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calc lola-1.6/LICENSE 0000664 0000000 0000000 00000104513 14141267051 0013321 0 ustar 00root root 0000000 0000000 GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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lola-1.6/Makefile 0000664 0000000 0000000 00000003020 14141267051 0013743 0 ustar 00root root 0000000 0000000 #
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
CFLAGS=-g -O2 -I. -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs
DESTDIR =
PREFIX = /usr/local
BINDIR = $(PREFIX)/bin
MANDIR = $(PREFIX)/share/man
all: lola calc pycalc
lola: lola.py
cp lola.py lola
chmod +x lola
calc: calc.c calc-gram.h
cc $(CFLAGS) -o $@ calc.c
calc-gram.h: calc-gram.ll lola.py
python3 ./lola.py -o $@ calc-gram.ll
pycalc: pycalc.py pycalc_gram.py
cp pycalc.py $@
chmod +x pycalc
pycalc_gram.py: pycalc_gram.ll lola.py
python3 ./lola.py -o $@ --format=python pycalc_gram.ll
install: lola lola.1
install -d $(DESTDIR)$(BINDIR)
install lola $(DESTDIR)$(BINDIR)
install -d $(DESTDIR)$(MANDIR)/man1
install lola.1 $(DESTDIR)$(MANDIR)/man1
clean:
rm -f lola calc pycalc calc-gram.h pycalc_gram.py
lola-1.6/README.md 0000664 0000000 0000000 00000015533 14141267051 0013576 0 ustar 00root root 0000000 0000000 # Lola — an LL parser table generator
Lola is a parser generator along the lines of yacc or bison, but
instead of handling LALR grammars, it only supports LL grammars. This
simplification makes the resulting parser much smaller, but of course
is only suitable if the target language is actually LL.
Lola was originally written over thirty years ago in a long-lost
dialect of lisp called Kalypso. I've transliterated it into python,
but I haven't tried to make it look like reasonable code.
## Input Syntax
The original kalypso version just used lists for the input. Python
doesn't exactly make that easy to manage, so I create a simple parser
(written in python data structures), and a python parser engine to
generate suitable data structures from a more usable input format
which looks much like yacc. I've used the grammar of the input format
to demonstrate the input format:
start : non-term start
|
;
non-term : SYMBOL @NONTERM@ COLON rules @RULES@ SEMI
;
rules : rule rules-p
;
rules-p : VBAR rule rules-p
|
;
rule : symbols @RULE@
;
symbols : SYMBOL @SYMBOL@ symbols
|
;
## Actions
Instead of assuming C syntax for actions with matching curly braces,
actions are just sequences of characters bounded by @ signs, to
include a literal @ within the action, just use two @ signs. The goal
is to let you use lola with any language by creating a new parser
framework and inserting the actions as appropriate. Each parser can do
whatever is appropriate with the contents of the actions.
## Parser Operation
The generated parse tables map a (terminal, non-terminal) pair into
one of the productions in the grammar. The parser has two pieces of
state -- a stack of tokens and a current input terminal. The parser
works as follows:
1) If the parse stack is not empty, pop an entry from the parse
stack, call it 'top'.
2) If 'top' is an action, then execute it and go back to 1)
3) If we don't have an input token, read one from the lexer, call
this 'token'
4) If 'token' is end-of-file, then check if the parse stack is
empty. If so, we're done. Otherwise, we have a syntax error.
5) If 'top' is a terminal, then check if it matches 'token'. If so,
discard 'token' and go back to 1).
6) Otherwise, 'top' must be a non-terminal. Check in the parse table
for and entry matching ('token', 'top'). If one exists, push the
resulting production tokens on the stack and go back to
1). Otherwise, we have a syntax error.
Note that 'actions' are executed *before* a token is read from
input. This allows them to operate on the just-matched input token
value, and also at end-of-file.
## C Framework
The current C output code generates a header file that defines the
tokens, specifies a parser that includes the actions as case elements
of a switch statement. All of this is generated in a single C header
file, which makes incorporating it into build system straightforward.
### The Generated C Header
The header file has four parts. Each part is protected by #ifdefs, so
this single header file can be used multiple times, extracting the
desired information by selecting the desired bits.
1) An enum containing all of the tokens used in the grammar,
terminals non-terminals and actions. This is to be used by the
lexer to pass terminals into the parser. All of the terminals are
spelled as they appeared in the grammar. Non-terminals are
prefixed by 'NON_TERMINAL_', actions are 'ACTION_' followed by a
number. Both of those shouldn't be used outside of the parser
itself. In all cases, '-' characters are replaced by '_'. This
section is selected when no #defines naming other sections are specified.
2) The parse tables. This section is selected with #define GRAMMAR_TABLE
3) An array of token names, indexed by token value. This is useful
when debugging a grammar during development. This section is
selected with #define TOKEN_NAMES
4) The parser. This is a pile of C code which uses the other data
from the file to parse input. This section is selected with
#define PARSE_CODE
Actions in the parser are expected to be C fragments and are inserted
into the body of the parse function.
The parse function is declared as:
typedef enum {
parse_return_success,
parse_return_syntax,
parse_return_end,
parse_return_oom,
} parse_return_t;
token_t
lex(void *lex_context);
static parse_return_t
parse(void *lex_context);
It passes the 'lex_context' value to the lex function, which must be
declared by the enclosing application.
### Building a C Parser
Here's an outline of a C parser. For this example, assume that the
name of the generated header file is 'test-gram.h'.
#include "test-gram.h"
#define PARSE_STACK_SIZE 32
static token_t
lex(void *lex_context) { ... }
#define GRAMMAR_TABLE
#define PARSE_CODE
#include "test-gram.h"
bool my_parser(void) { return parse(NULL) == parse_return_success; }
If you add a '#define PARSE_DEBUG' before including the parse code,
then the parser operation will be printed to stdout during
operation. This code uses the token names, and so you will also need
to add '#define TOKEN_NAMES' as well.
## Calculator Example
This repository includes a simple 4-function calculator example that
demonstrates how to interpret the parse tables and use the rest of the
generated header file.
## Future Ideas
While lola is already useful, I've got some ideas on how to improve
it.
### Automatic Grammar Transformations
One of the restrictions of the current parser is that the selection of
a production can only depend on the current input token and
non-terminal on the top of the stack. This often requires inserting
additional non-terminals and productions into the grammar. There are a
set of grammar transformations which can be applied automatically to
simpify writing lola grammars.
The kalypso code includes a tool called 'flo' which does
left-common-subexpression factoring. That might be an interesting
place to start.
### Better Error Detection
Lola does only limited checking of the specified language; many non-LL
languages can be specified and will generate output. Of course, the
resulting output will only recognize an LL language related (in some
way) to the desired language. Incorporating additional checks within
lola to validate the input would help avoid errors here.
### Synthetic Attribute Tracking
Actions within a lola grammar get no help from the parser with
managing attributes. In yacc, each token in a production is assigned
an attribute value, making writing actions much clearer and more
straightforward. I'd like to do something similar in lola. I think
this would involve creating an attribute stack and then decorating the
parse tables with implicit actions to manage that during evaluation of
the parse tables, pushing values as tokens in the production are
processed, and popping a list of values when the final token for a
production is handled.
lola-1.6/calc-gram.ll 0000664 0000000 0000000 00000010203 14141267051 0014463 0 ustar 00root root 0000000 0000000 #
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
#
# The parser operation is table driven -- the parse table
# is a set of mappings from (terminal,non-terminal) to (token ...),
# with (token ...) including terminals, non-terminals and actions.
#
# There is a parse stack of tokens. Depending on the type of the token on the
# top of the parse stack, three different actions are taken.
#
# 1) When the top of the parse stack is a non-terminal, it is replaced
# by the contents of the parse table entry cooresponding to the
# current input terminal and top of stack non-terminal
#
# 2) When the top of the parse stack is a terminal, it must match
# the current input terminal. The top of stack is discarded and
# another input token read.
#
# 3) When the top of the parse stack is an action, it is executed
#
# Because of this operation, actions wanting to use the value of the
# current input terminal are placed *before* the token itself. This is
# guaranteed to work as the only way to get to the production is if
# the input terminal is of the correct type.
#
# Actions wanting to be executed after the actions within one of the productions
# of a non-terminal are placed *after* the non-terminal. Otherwise, they would
# be executed before the actions within the non-terminal production due to the
# order of tokens pulled from the stack.
#
# The syntax is pretty simple, and is designed to mirror the usual
# yacc syntax.
#
# Actions are any sequence of characters enclosed in
# @. Use two @ signs to include an actual @ in the action.
#
# What I'd like to figure out is how to automate the management
# of the value stack so that actions can associate values
# with the non-terminal associated with the production in which
# they occur. This would make them work more like yacc actions as
# values could then be synthesized upwards in the grammar
#
# Perhaps a special token could be placed on the stack at the end of
# each sequence of tokens that replace a non-terminal, and this token
# could signal suitable value stack handling? That would need to know
# the number of elements that had been in the production when it was
# placed on the parse stack to know how many values to remove from the
# value stack, it would then drop that number of elements from the
# value stack and push the value computed by the last action within
# the production
#
# A calculator session is a sequence of lines
start : line start
|
;
# A line is an expression followed by a newline, or just a newline
# alone.
#
# The C code implementing the calculator provides a numeric stack with
# push/pop functions. Note that this set of actions is responsible for
# maintaining that stack correctly; errors will terminate the parser, and so
# the stack could be re-initialized when the parser is restarted.
#
line : expr NL
@{
printf("%g\n", pop());
}@
| NL
;
# Three levels of precedence, (+ -), (* /) and then unary
# minus/parenthesized exprs
expr : term expr-p
;
expr-p : PLUS term
@{
double b = pop();
double a = pop();
push(a + b);
}@
expr-p
| MINUS term
@{
double b = pop();
double a = pop();
push(a - b);
}@
expr-p
|
;
term : fact term-p
;
term-p : TIMES fact
@{
double b = pop();
double a = pop();
push(a * b);
}@
term-p
| DIVIDE fact
@{
double b = pop();
double a = pop();
push(a / b);
}@
term-p
|
;
fact : OP expr CP
| MINUS fact
@{
double a = pop();
push(-a);
}@
| NUMBER
@{
push(lex_value);
}@
;
lola-1.6/calc.c 0000664 0000000 0000000 00000004722 14141267051 0013363 0 ustar 00root root 0000000 0000000 /*
* Copyright © 2019 Keith Packard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include
#include
#include
#include
#include
#include "calc-gram.h"
#define PARSE_STACK_SIZE 32
static int lex_c = 0;
static int in_c(void)
{
int c;
if (lex_c != 0) {
c = lex_c;
lex_c = 0;
} else {
c = getchar();
}
return c;
}
static void un_in_c(int c)
{
lex_c = c;
}
static double lex_value;
static token_t
lex(void *lex_context)
{
for (;;) {
int c = in_c();
switch (c) {
case EOF:
return END;
case '+':
return PLUS;
case '-':
return MINUS;
case '*':
return TIMES;
case '/':
return DIVIDE;
case '(':
return OP;
case ')':
return CP;
case '\n':
return NL;
}
if ('0' <= c && c <= '9') {
char num_buf[32];
int num_cnt = 0;
while (isdigit(c)) {
num_buf[num_cnt++] = c;
c = in_c();
}
if (c == '.') {
num_buf[num_cnt++] = c;
c = in_c();
while (isdigit(c)) {
num_buf[num_cnt++] = c;
c = in_c();
}
}
if (c == 'e') {
num_buf[num_cnt++] = c;
c = in_c();
if (c == '-' || c == '+') {
num_buf[num_cnt++] = c;
c = in_c();
}
while (isdigit(c)) {
num_buf[num_cnt++] = c;
c = in_c();
}
}
num_buf[num_cnt++] = '\0';
un_in_c(c);
lex_value = strtod(num_buf, NULL);
return NUMBER;
}
}
}
static double value_stack[32];
static int value_stack_p = 0;
static void push(double value)
{
value_stack[value_stack_p++] = value;
}
static double pop(void)
{
return value_stack[--value_stack_p];
}
#define GRAMMAR_TABLE
#define TOKEN_NAMES
#define PARSE_CODE
#include "calc-gram.h"
int main(int argc, char **argv)
{
parse(NULL);
return 0;
}
lola-1.6/flo 0000775 0000000 0000000 00000013456 14141267051 0013027 0 ustar 00root root 0000000 0000000 #!/local/bin/kalypso
;
; Copyright © 2019 Keith Packard
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License along
; with this program; if not, write to the Free Software Foundation, Inc.,
; 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
;
;
; flo
;
; factor left common expressions out of a grammar
;
;
; remove the first element from each of a list
; of productions (unless the production is nil)
;
(defun clip-firsts (productions)
(cond (productions
(cond ((car productions)
(cons (caar productions) (clip-firsts (cdr productions)))
)
(t (clip-firsts (cdr productions)))
)
)
(t nil)
)
)
;
; return the first duplicated element from a list of elements
;
(defun has-common (firsts)
(cond ((nil? firsts) nil)
((member? (car firsts) (cdr firsts)) (car firsts))
(t (has-common (cdr firsts)))
)
)
;
; return a list of productions which have the given
; element as their first member
;
(defun with-first (productions first)
(cond ((nil? productions) nil)
((= (caar productions) first)
(cons (car productions) (with-first (cdr productions) first))
)
(t (with-first (cdr productions) first))
)
)
;
; return a list of productions which *don't* have the given
; element as their first member
;
(defun without-first (productions first)
(cond ((nil? productions) nil)
((not (= (caar productions) first))
(cons (car productions) (without-first (cdr productions) first))
)
(t (without-first (cdr productions) first))
)
)
;
; strip the first 'count' elements off a list of productions
;
(defun remove-firsts (productions count)
(cond ((nil? productions) nil)
(t (cons (nthcdr count (car productions))
(remove-firsts (cdr productions)
count
)
)
)
)
)
;
; return 't if each production in the list has the same first
; element
;
(defun all-common-first (productions)
(cond ((and productions (cdr productions))
(cond ((or (and (nil? (car productions))
(nil? (cadr productions))
)
(and (car productions)
(cadr productions)
(= (caar productions) (caadr productions))
)
)
(all-common-first (cdr productions))
)
(t nil)
)
)
(t)
)
)
;
; return the maximal list of common first sub-lists
; from a set of productions
;
(defun max-common (productions)
(cond ((all-common-first productions)
(cons (caar productions)
(max-common (remove-firsts productions 1))
)
)
(t
nil)
)
)
;
; factor out common left sub-lists from the list
; of productions associated with a particular non-terminal
;
(defun eliminate-common (non-terminal dictionary)
(let ((productions (eval non-terminal))
(firsts)
(common)
(common-list)
(removed)
(new)
(new-name)
)
(setq firsts (clip-firsts productions))
(setq common (has-common firsts))
(cond (common
(setq removed (with-first productions common))
(setq common-list (max-common removed))
(setq new-name (get-name non-terminal))
(setq new t)
;
; generate a name for the new non-terminal
; keep appending "p" until it's new
;
(while new
(setq new-name (strcat new-name "p"))
(setq new (dictionary-lookup dictionary new-name))
)
(setq new (symbol new-name dictionary))
(set new (remove-firsts removed (length common-list)))
(set non-terminal (cons (conc common-list (list new))
(without-first productions common))
)
(cons new (conc (eliminate-common new dictionary)
(eliminate-common non-terminal dictionary)
)
)
)
(t nil)
)
)
)
;
; remove common left sub-expressions from each non-terminal
; in the grammar
;
(defun factor-left (non-terminals)
(let ((l) (new))
(setq l non-terminals)
(while l
(setq new (eliminate-common (car l) flo-dictionary))
(cond (new
(setq non-terminals (conc non-terminals new))
)
)
(setq l (cdr l))
)
non-terminals
)
)
(defun to-non-terminal-list (grammar)
(if grammar
(let ((name (caar grammar)))
(set name (cdar grammar))
(cons name (to-non-terminal-list (cdr grammar)))
)
else
nil
)
)
(defun from-non-terminal-list (non-terminals)
(cond (non-terminals
(cons (cons (car non-terminals) (eval (car non-terminals)))
(from-non-terminal-list (cdr non-terminals))
)
)
(nil)
)
)
(defun print-productions (productions)
(cond (productions
(patom "\t")
(cond ((car productions)
(print (car productions))
)
(t (patom "()"))
)
(terpr)
(print-productions (cdr productions))
)
)
)
(defun print-one-set (set)
(patom " (")
(print (car set)) (terpr)
(print-productions (cdr set))
(patom "\t)\n")
)
(defun print-grammars (grammar)
(cond (grammar
(print-one-set (car grammar))
(print-grammars (cdr grammar))
)
)
)
(defun print-grammar (grammar)
(patom "(\n")
(print-grammars grammar)
(patom " )\n")
)
(defun flo-file (fd)
(setq flo-dictionary (new-dictionary))
(setq grammar (fread-dictionary fd flo-dictionary))
(setq non-terminals (to-non-terminal-list grammar))
(setq result (from-non-terminal-list (factor-left non-terminals)))
(print-grammar result)
)
(setq file-in stdin)
(setq argv (cdr argv))
(if argv
(setq file-in (fopen (car argv) 'r))
(if (nil? file-in)
(error (strcat "flo: can't open " (sprint (car argv))))
)
)
(flo-file file-in)
lola-1.6/flo.py 0000664 0000000 0000000 00000011330 14141267051 0013440 0 ustar 00root root 0000000 0000000 #!/usr/bin/env python3
#
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
grammar = {
"lines" : (("line", "lines"),
()
),
"line" : (("expr", "#PRINT", "NL"),
("NL",),
),
"expr" : (("term", "PLUS", "expr", "#ADD"),
("term", "MINUS", "expr", "#SUBTRACT"),
("term",)
),
"term" : (("fact", "term-p"),
),
"term-p" : (("TIMES", "fact", "#TIMES", "term-p"),
("DIVIDE", "fact", "#DIVIDE", "term-p"),
(),
),
"fact" : (("OP", "expr", "CP"),
("MINUS", "fact", "#NEGATE"),
("#PUSH", "NUMBER"),
)
}
def productions(non_terminal):
return grammar[non_terminal]
# flo
#
# factor left common expressions out of a grammar
#
def head(list):
return list[0]
def rest(list):
return list[1:]
def nthrest(list, n):
return list[n:]
def error(msg):
print(msg)
exit(1)
#
# remove the first element from each of a list
# of productions (unless the production is nil)
#
def clip_firsts(prods):
ret = ()
for prod in prods:
if prod:
ret += (head(prod),)
return ret
#
# return the first duplicated element from a list of elements
#
def find_common(firsts):
while firsts:
f = head(firsts)
firsts = rest(firsts)
if f in firsts:
return f
#
# return a list of productions which have the given
# element as their first member
#
def with_first(prods, first):
ret = ()
for prod in prods:
if first == head(prod):
ret = ret + (prod,)
return ret
#
# return a list of productions which *don't* have the given
# element as their first member
#
def without_first (prods, first):
ret = ()
for prod in prods:
if first != head(prod):
ret = ret + (prod,)
return ret
#
# strip the first 'count' elements off a list of productions
#
def remove_firsts (prods, count):
ret = ()
for prod in prods:
ret = ret + (nthrest(prod, count),)
return ret
#
# return True if each production in the list has the same first
# element
#
def all_common_first(prods):
while len(prods) >= 2:
if head(prods[0]) != head(prods[1]):
return False
prods = rest(prods)
return True
#
# return the maximal list of common first sub-lists
# from a set of productions
#
def max_common(prods):
ret = ()
while all_common_first(prods):
ret = ret + (head(prods[0]),)
prods = remove_firsts(prods, 1)
return ret
#
# factor out common left sub-lists from the list
# of productions
#
def eliminate_common(non_terminal):
prods = productions(non_terminal)
firsts = clip_firsts(prods)
common = find_common(firsts)
if common:
removed = with_first(prods, common)
remain = without_first(prods, common)
common_list = max_common(removed)
new_non_terminal = non_terminal
while True:
new_non_terminal = new_non_terminal + "-p"
if new_non_terminal not in grammar:
break
grammar[new_non_terminal] = remove_firsts(removed, len(common_list))
grammar[non_terminal] = ((common_list + (new_non_terminal,)),) + remain
#
# remove common left sub-expressions from each non-terminal
# in the grammar
#
def factor_left(non_terminals):
for non_terminal in non_terminals:
eliminate_common(non_terminal)
def get_non_terminals(grammar):
non_terminals = ()
for e in grammar:
non_terminals += (e,)
return non_terminals
def dump_grammar(grammar):
for nt,prods in grammar.items():
print("%s" % nt)
started = False
for prod in prods:
label = ":"
if started:
label = "|"
print("\t%s %s" % (label, prod))
started = True
print("\t;")
def flo():
factor_left(get_non_terminals(grammar))
flo()
dump_grammar(grammar)
lola-1.6/lola-gram.ll 0000664 0000000 0000000 00000000336 14141267051 0014516 0 ustar 00root root 0000000 0000000 start : non-term start
|
;
non-term : SYMBOL @NONTERM@ COLON rules @RULES@ SEMI
;
rules : rule rules-p
;
rules-p : VBAR rule rules-p
|
;
rule : symbols @RULE@
;
symbols : SYMBOL @SYMBOL@ symbols
|
;
lola-1.6/lola.1 0000664 0000000 0000000 00000001671 14141267051 0013326 0 ustar 00root root 0000000 0000000 .\"
.\" Copyright © 2019 Keith Packard
.\"
.\" This program is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation, either version 2 of the License, or
.\" (at your option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful, but
.\" WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
.\" General Public License for more details.
.\"
.TH LOLA 1 "lola" ""
.SH NAME
lola \- LL parser generator
.SH SYNOPSIS
.B "lola" [--format c|python] [--output filename] [-Dname] grammar.ll
.SH DESCRIPTION
.I lola
is a general purpose parser generator for context-free LL
languages. It can generate a C program or Python data structure to
parse the language represented by context-free LL grammars.
.SH AUTHOR
Keith Packard
lola-1.6/lola.py 0000775 0000000 0000000 00000114026 14141267051 0013620 0 ustar 00root root 0000000 0000000 #!/usr/bin/env python3
# coding: utf-8
#
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
import argparse
import collections
import pprint
import re
import sys
actions_marker = "@@ACTIONS@@"
parse_code = """
static token_t parse_stack[PARSE_STACK_SIZE];
#if PARSE_STACK_SIZE < 256
typedef uint8_t parse_stack_p_t;
#else
#if PARSE_STACK_SIZE < 65536
typedef uint16_t parse_stack_p_t;
#else
typedef uint32_t parse_stack_p_t;
#endif
#endif
#if NON_TERMINAL_SIZE < 256
typedef uint8_t non_terminal_index_t;
#else
#if NON_TERMINAL_SIZE < 65536
typedef uint16_t non_terminal_index_t;
#else
typedef uint32_t non_terminal_index_t;
#endif
#endif
#ifndef PARSE_TABLE_FETCH_TOKEN
#define PARSE_TABLE_FETCH_TOKEN(addr) (*(addr))
#endif
#ifndef PARSE_TABLE_FETCH_INDEX
#define PARSE_TABLE_FETCH_INDEX(addr) (*(addr))
#endif
static const token_t *
match_state(token_t terminal, token_t non_terminal)
{
token_key_t terminal_key = terminal;
if (terminal_key >= sizeof(terminal_table) / sizeof(terminal_table[0]))
return NULL;
non_terminal_index_t non_term = non_terminal_index(PARSE_TABLE_FETCH_INDEX(&terminal_table[terminal_key]));
for (;;) {
uint8_t i = PARSE_TABLE_FETCH_INDEX(&non_terminal_table[non_term]);
if (i == 0xfe) {
i = PARSE_TABLE_FETCH_INDEX(&non_terminal_table[non_term+1]);
non_term = non_terminal_index(i);
} else if (i == 0xff) {
break;
} else {
const token_t *production = &production_table[production_index(i)];
if (PARSE_TABLE_FETCH_TOKEN(production) == non_terminal) {
return production + 1;
}
non_term++;
}
}
return NULL;
}
static inline token_t
parse_pop(int *parse_stack_p)
{
if ((*parse_stack_p) == 0)
return TOKEN_NONE;
return parse_stack[--(*parse_stack_p)];
}
static inline bool
parse_push(const token_t *tokens, int *parse_stack_p)
{
token_t token;
while ((token = PARSE_TABLE_FETCH_TOKEN(tokens++)) != TOKEN_NONE) {
if ((*parse_stack_p) >= PARSE_STACK_SIZE)
return false;
parse_stack[(*parse_stack_p)++] = token;
}
return true;
}
static inline bool
is_terminal(token_t token)
{
return token < FIRST_NON_TERMINAL;
}
static inline bool
is_action(token_t token)
{
return token >= FIRST_ACTION;
}
static inline bool
is_non_terminal(token_t token)
{
return !is_terminal(token) && !is_action(token);
}
typedef enum {
parse_return_success,
parse_return_syntax,
parse_return_end,
parse_return_oom,
parse_return_error,
} __attribute__((packed)) parse_return_t;
static parse_return_t
parse(void *lex_context)
{
token_t token = TOKEN_NONE;
int parse_stack_p = 0;
#ifdef PARSE_TOP
PARSE_TOP
#endif
parse_stack[parse_stack_p++] = NON_TERMINAL_start;
for (;;) {
token_t top = parse_pop(&parse_stack_p);
if (is_action(top)) {
switch(top) {
@@ACTIONS@@
default:
break;
}
#ifdef PARSE_ACTION_BOTTOM
PARSE_ACTION_BOTTOM;
#endif
continue;
}
if (token == TOKEN_NONE)
token = lex(lex_context);
if (top == TOKEN_NONE) {
if (token != END)
return parse_return_syntax;
return parse_return_success;
}
#ifdef PARSE_DEBUG
{
int i;
#ifdef token_name
printf("%-15s : %s", token_names[token], token_names[top]);
for (i = parse_stack_p-1; i >= 0; i--) {
if (!is_action(parse_stack[i]))
printf(" %s", token_names[parse_stack[i]]);
else
printf(" <%d>", parse_stack[i]);
}
#else
printf("token %d stack %d", token, top);
for (i = parse_stack_p-1; i >= 0; i--)
printf(" %d", parse_stack[i]);
#endif
printf("\\n");
}
#endif
if (is_terminal(top)) {
if (top != token) {
if (token == END)
return parse_return_end;
return parse_return_syntax;
}
token = TOKEN_NONE;
} else {
const token_t *tokens = match_state(token, top);
if (!tokens)
return parse_return_syntax;
if (!parse_push(tokens, &parse_stack_p))
return parse_return_oom;
}
}
}
"""
# ll parser table generator
#
# the format of the grammar is:
#
# {"non-terminal": (("SYMBOL", "non-terminal", "@action"), (production), (production)),
# "non-terminal": ((production), (production), (production)),
# }
#
# The start symbol must be named "start", the EOF token must be named "END"
#
end_token="END"
def productions(grammar, non_terminal):
if non_terminal not in grammar:
error("Undefined non-terminal %s" % non_terminal)
return grammar[non_terminal]
# data abstraction
#
# a non terminal is a string starting with lower case
# a terminal is a string starting with upper case
# an action is a string starting with '@'
#
def is_non_terminal(item):
return item[0].islower()
def is_terminal(item):
return item[0].isupper()
def is_action(item):
return item[0] == '@'
def is_null_production(p):
if len(p) == 0:
return True
elif is_action(p[0]):
return is_null_production(p[1:])
else:
return False
start_symbol = "start"
def is_start_symbol(item):
global start_symbol
return item == start_symbol
def head(list):
return list[0]
def rest(list):
return list[1:]
def fprint(msg, end='\n', file=sys.stdout):
file.write(msg)
file.write(end)
def error(msg):
fprint(msg, file=sys.stderr)
exit(1)
#
# generate the first set for the productions
# of a non-terminal
#
def first_set(grammar, non_terminal):
ret=()
for prod in productions(grammar, non_terminal):
if is_null_production(prod):
ret += ((),)
else:
ret += first(grammar, prod)
return ret
first_list = ()
def unique(list):
if not list:
return list
f = head(list)
r = rest(list)
if f in r:
return unique(r)
else:
return (f,) + unique(r)
def delete(elt, list):
ret = ()
for i in list:
if i != elt:
ret = ret + (i,)
return ret
#
# generate the first set for a single symbol This is easy for a
# terminal -- the result is the item itself. For non-terminals, the
# first set is the union of the first sets of all the productions
# that derive the non-terminal
#
# Note that this also checks to see if the grammar is left-recursive.
# This will succeed because a left recursive grammar will always
# re-reference a particular non-terminal when trying to generate a
# first set containing it.
#
def first_for_symbol(grammar, item):
global first_list
if item in first_list:
error("lola: left-recursive grammar for symbol %s" % item)
first_list = (item,) + first_list
ret = False
if is_terminal(item):
ret = (item,)
elif is_non_terminal(item):
set = first_set(grammar, item)
ret = unique(set)
first_list = rest(first_list)
return ret
#
# generate the first list for a production.
#
# the first list is the set of symbols which are legal
# as the first symbols in some possible expansion of the
# production. The cases are simple:
#
# if the (car production) is a terminal, then obviously
# the only possible first symbol is that terminal
#
# Otherwise, generate the first lists for *all* expansions
# of the non-terminal (car production). If that list doesn't
# contain an epsilon production 'nil, the we're done. Otherwise,
# this set must be added to the first set of (cdr production) because
# some of the possible expansions of the production will not have any
# terminals at all from (car production).
#
# Note the crufty use of dictionaries to save old expansion of first
# sets. This is because both ll and follow call first quite often,
# frequently for the same production
#
first_dictionary = {}
def reset_first():
global first_dictionary
global first_list
first_dictionary = {}
first_list = ()
def first(grammar, production):
global first_dictionary
while production and is_action(head(production)):
production = rest(production)
if production in first_dictionary:
ret = first_dictionary[production]
else:
if production:
ret = first_for_symbol(grammar, head(production))
if () in ret:
ret = delete((), ret) + first(grammar, rest(production))
else:
ret = ((),)
first_dictionary[production] = ret
return ret
#
# generate the follow set of a for an item in a particular
# production which derives a particular non-terminal.
#
# This is nil if the production does
# not contain the item.
#
# Otherwise, it is the first set for the portion of the production
# which follows the item -- if that first set contains nil, then the
# follow set also contains the follow set for the non-terminal which
# is derived by the production
#
def follow_in_production(grammar, item, non_terminal, production, non_terminals):
# Find all instances of the item in this production; it
# may be repeated
f = ()
for i in range(len(production)):
if production[i] == item:
f += first(grammar, production[i+1:])
if () in f:
f = delete((), f) + follow(grammar, non_terminal, non_terminals)
return f
#
# loop through the productions of a non-terminal adding
# the follow sets for each one. Note that this will often
# generate duplicate entries -- as possibly many of the
# follow sets for productions will contain the entire follow
# set for the non-terminal
#
def follow_in_non_terminal (grammar, item, non_terminal, non_terminals):
ret = ()
for prod in productions(grammar, non_terminal):
ret += follow_in_production(grammar, item, non_terminal, prod, non_terminals)
return ret
#
# generate the follow set for a particular non-terminal
# The only special case is for the
# start symbol who's follow set also contains the
# end-token
#
follow_dictionary = {}
def reset_follow():
global follow_dictionary
follow_dictionary = {}
#
# A list of in-process follow calls
# Use this to avoid recursing into the same
# non-terminal
#
follow_stack = []
def follow(grammar, item, non_terminals):
global follow_dictionary, follow_stack
if item in follow_dictionary:
ret = follow_dictionary[item]
else:
ret = ()
follow_stack.append(item)
for non_terminal in non_terminals:
if non_terminal not in follow_stack:
ret += follow_in_non_terminal(grammar, item, non_terminal, non_terminals)
follow_stack.pop()
if is_start_symbol(item):
ret = (end_token,) + ret
ret = unique(ret)
follow_dictionary[item] = ret
return ret
#
# this makes an entry in the output list, this is just one
# of many possible formats
#
def make_entry(terminal, non_terminal, production):
return {(terminal, non_terminal): production}
def add_dict(a,b):
for key,value in b.items():
if key in a:
fprint("multiple productions match %r - %r and %r" % (key, value, a[key]), file=sys.stderr)
if len(value) < len(a[key]):
continue
a[key] = value
#
# generate the table entries for a particular production
# this is taken directly from Aho, Ullman and Seti
#
# Note: this function uses dynamic scoping -- both non-terminal
# and non-terminals are expected to have been set by the caller
#
def ll_one_production(grammar, production, non_terminal, non_terminals):
firsts = first(grammar, production)
ret = {}
for f in firsts:
if not f:
follows = follow(grammar, non_terminal, non_terminals)
for f in follows:
add_dict(ret, make_entry(f, non_terminal, production))
elif is_terminal(f):
add_dict(ret, make_entry(f, non_terminal, production))
return ret
#
# generate the table entries for all productions of
# a particular non-terminal
#
def ll_one_non_terminal(grammar, non_terminal, non_terminals):
ret = {}
# print("ll_one_non_terminal %r" % non_terminal)
for p in productions(grammar, non_terminal):
add_dict(ret, ll_one_production(grammar, p, non_terminal, non_terminals))
# print("ll for %r is %r" % (non_terminal, ret))
return ret
#
# generate the table entries for all the non-terminals
#
def ll_non_terminals(grammar, non_terminals):
ret = {}
for non_terminal in non_terminals:
add_dict(ret, ll_one_non_terminal(grammar, non_terminal, non_terminals))
return ret
def get_non_terminals(grammar):
non_terminals = ()
for non_terminal in grammar:
non_terminals += (non_terminal,)
return non_terminals
def get_terminals(grammar):
terminals = ("END",)
for non_terminal, prods in grammar.items():
for prod in prods:
for token in prod:
if is_terminal(token) and not token in terminals:
terminals += (token,)
return terminals
def count_actions(grammar):
actions = 0
for non_terminal, prods in grammar.items():
for prod in prods:
for token in prod:
if is_action(token):
actions += 1
return actions
def compress_action(action):
# trailing comments
action = re.sub("//.*\n", "\n", action)
# embedded comments
action = re.sub("/\*.*?\*/", " ", action)
# compress whitespace
action = re.sub("\s+", " ", action)
# remove leading and trailing whitespace and braces
action = action.strip('@ \t\n{}')
return action
def has_action(actions, action):
for a in actions:
if compress_action(a) == compress_action(action):
return True
return False
def action_sort(action):
return len(compress_action(action))
def get_actions(grammar):
actions = ()
for non_terminal, prods in grammar.items():
for prod in prods:
for token in prod:
if is_action(token) and not has_action(actions, token):
actions += (token,)
return sorted(actions, key=action_sort)
#
# produce a parse table for the given grammar
#
def ll (grammar):
reset_first()
reset_follow()
non_terminals = get_non_terminals(grammar)
return ll_non_terminals(grammar, non_terminals)
def dump_table(table, file=sys.stdout):
fprint("Parse table", file=file)
for key,value in table.items():
fprint("\t%r -> %r" % (key, value), file=file)
def dump_grammar(grammar, file=sys.stdout):
for non_term, prods in grammar.items():
fprint("%-20.20s" % non_term, end='', file=file)
first=True
for prod in prods:
if first:
fprint(":", end='', file=file)
first = False
else:
fprint(" |", end='', file=file)
for token in prod:
fprint(" %s" % token, end='', file=file)
fprint("", file=file)
fprint(" ;", file=file)
grammar = {
start_symbol: (("non-term", start_symbol),
()
),
"non-term" : (("SYMBOL", "@NONTERM", "COLON", "rules", "@RULES", "SEMI"),
),
"rules" : (("rule", "rules-p"),
),
"rules-p" : (("VBAR", "rule", "rules-p"),
(),
),
"rule" : (("symbols", "@RULE"),
),
"symbols" : (("SYMBOL", "@SYMBOL", "symbols"),
(),
),
}
lex_c = False
lex_file = sys.stdin
lex_file_name = ""
lex_line = 1
def onec():
global lex_line
global lex_file
c = lex_file.read(1)
if c == '\n':
lex_line = lex_line + 1
return c
def getc():
global lex_c
if lex_c:
c = lex_c
lex_c = False
else:
c = onec()
if c == '#':
while c != '\n':
c = onec()
return c
def ungetc(c):
global lex_c
lex_c = c
lex_value = False
def is_symbol_start(c):
return c.isalpha() or c == '_' or c == '-'
def is_symbol_cont(c):
return is_symbol_start(c) or c.isdigit()
action_lines = {}
def action_line(action):
global action_lines
return action_lines[action]
def mark_action_line(action, line):
global action_lines
action_lines[action] = line
ppsyms = {}
def lex_sym(c):
v = c
while True:
c = getc()
if is_symbol_cont(c):
v += c
else:
ungetc(c)
break;
return v
def define_pp(name):
ppsyms[name] = True
def defined_pp(name):
return name in ppsyms
pp_stack = []
def include_pp():
global pp_stack
return len(pp_stack) == 0 or pp_stack[-1]
def push_pp():
global pp_stack
name = lex_sym(getc())
pp_stack.append(include_pp() and defined_pp(name))
def pop_pp():
global pp_stack
if len(pp_stack):
pp_stack.pop()
def lex():
global lex_value
lex_value = False
while True:
c = getc()
if c == '{':
push_pp()
continue
if c == '}':
pop_pp()
continue
if not include_pp():
continue
if c == '':
return 'END'
if c == '|':
return "VBAR"
if c == ':':
return "COLON"
if c == ';':
return "SEMI"
if c == '@':
v = c
at_line = lex_line
while True:
c = getc()
if c == '':
error("Missing @, token started at line %d" % at_line)
elif c == '@':
c = getc()
if c != '@':
ungetc(c)
break
v += c
lex_value = v
mark_action_line(v, at_line)
return "SYMBOL"
if is_symbol_start(c):
lex_value = lex_sym(c)
return "SYMBOL"
def lola():
global lex_value
global value_stack
# Construct the parser for lola input files
table = ll(grammar)
# Run the lola parser
stack = (start_symbol,)
token = False
result = {}
non_term = False
prod = ()
prods = ()
while True:
if stack:
top = head(stack)
stack = rest(stack)
else:
top = False
if top and is_action(top):
if top == "@NONTERM":
non_term = lex_value
elif top == "@RULES":
result[non_term] = prods
prods = ()
non_term = False
elif top == "@RULE":
prods = prods + (prod,)
prod = ()
elif top == "@SYMBOL":
prod = prod + (lex_value,)
continue
if not token:
token = lex()
# print("token %r top %r stack %r" % (token, top, stack))
if not top:
if token == end_token:
return result
error("parse stack empty at %r" % token)
if is_terminal(top):
if top == token:
token = False
else:
error("%s:%d: parse error. got %r expected %r" % (lex_file_name, lex_line, token, top))
else:
key = (token, top)
if key not in table:
error("%s:%d: parse error at %r %r" % (lex_file_name, lex_line, token, top))
stack = table[key] + stack
def to_c(string):
return string.replace("-", "_")
def action_has_name(action):
return action[1].isalpha()
def action_name(token_values, action):
if action_has_name(action):
action = to_c(action)[1:]
end = action.find(' ')
if end != -1:
action = action[0:end]
return "ACTION_" + action
else:
return "ACTION_%d" % token_values[compress_action(action)]
def action_value(action):
if action_has_name(action):
end = action.find(' ')
if end == -1:
return ""
else:
end = 0
return action[end+1:]
def terminal_name(terminal):
return to_c(terminal)
def terminal_names(terminals):
names = None
for terminal in terminals:
name = terminal_name(terminal)
if names:
names += " " + name
else:
names = name
return names
def non_terminal_name(non_terminal):
return "NON_TERMINAL_" + to_c(non_terminal)
def token_name(token_values, token):
if is_action(token):
return action_name(token_values, token)
elif is_terminal(token):
return terminal_name(token)
else:
return non_terminal_name(token)
def dump_python(grammar, parse_table, file=sys.stdout):
fprint('parse_table = \\', file=file)
pp = pprint.PrettyPrinter(indent=4, stream=file)
pp.pprint(parse_table)
def pad(value, round):
p = value % round
if p != 0:
return round - p
return 0
c_line = 1
def print_c(string, end='\n', file=None):
global c_line
c_line += string.count("\n") + end.count("\n")
fprint(string, file=file, end=end)
def pretty(title, a):
print("%s" % title)
pp = pprint.PrettyPrinter(indent=4, stream=sys.stdout)
pp.pprint(a)
def is_subset(sub,sup):
return set(sub) - set(sup) == set()
def pick_binding(possibles, n):
binding = {}
for sub, supers in possibles.items():
pick = n % len(supers)
n //= len(supers)
binding[sub] = supers[pick]
if n:
return None
return binding
def pick_binding_simple(possibles, indices):
binding = {}
for sub, supers in possibles.items():
pick = indices[sub]
binding[sub] = supers[pick]
return binding
def total_bindings(possibles):
n = 1
for sub, supers in possibles.items():
n *= len(supers)
return n
def lookup_optimized(table, binding, terminal, non_terminal):
terms = (terminal,)
while True:
if not terms in table:
return False
for prod in table[terms]:
if prod[0] == non_terminal:
return prod
if not terms in binding:
return False
terms = binding[terms]
def non_terminal_table(terminals, terminal_map, binding):
table = collections.OrderedDict()
finished = {}
for terminal in terminals:
while True:
terms = (terminal,)
if not terms in terminal_map:
break
if terms in finished:
break
# Now follow that to the end of the list of bindings
while terms in binding and not binding[terms] in finished:
terms = binding[terms]
table[terms] = terminal_map[terms]
finished[terms] = True
for terms, prods in terminal_map.items():
for term in terms:
ts = (term,)
for prod in prods:
if not lookup_optimized(table, binding, term, prod[0]):
if not ts in table:
table[ts] = ()
table[ts] += (prod,)
return table
def prod_size(prod):
return len(prod) + 1
def non_terminal_size(table):
l = 0
for terms, prods in table.items():
l += len(prods) + 2
return l
def optimize(grammar, parse_table, terminals, non_terminals, output):
#
# Walk over the parse table
# and figure out which non-terminal → production
# mappings are shared between terminals
#
non_terminal_map = {}
for terminal in terminals:
for non_terminal in non_terminals:
parse_key = (terminal, non_terminal)
if parse_key in parse_table:
prod = parse_table[parse_key]
prod_key = (non_terminal, prod)
if prod_key not in non_terminal_map:
non_terminal_map[prod_key] = ()
non_terminal_map[prod_key] = non_terminal_map[prod_key] + (terminal,)
# Now flip that over to generate a map from a set of terminals to the
# non-terminal/productions they match
terminal_map = {}
for prod, terms in non_terminal_map.items():
if terms not in terminal_map:
terminal_map[terms] = ()
terminal_map[terms] += (prod,)
possibles = {}
# Build possible terminals mappings for each entry in
# non_terminal_map. This means, for each set of terminals,
# find the list of all supersets
for prod_sub, term_sub in non_terminal_map.items():
for prod_sup, term_sup in non_terminal_map.items():
if term_sub != term_sup and is_subset(term_sub, term_sup):
# add this set to the list of possible first bindings
if not term_sub in possibles:
possibles[term_sub] = ()
if not term_sup in possibles[term_sub]:
possibles[term_sub] = possibles[term_sub] + (term_sup,)
# Trim possible terminal mappings so that only the smallest subset
# along each path is present. This should leave the few entries
# for each terminal set which offers real options
new_possibles = {}
for sub, sups in possibles.items():
new_sups = ()
for sup in sups:
for check in sups:
if sup != check and is_subset(check, sup):
break
else:
new_sups = new_sups + (sup,)
new_possibles[sub] = new_sups
print_c("/*", file=output)
print_c(" * Possible graph edges %d total %d minimal" %
(total_bindings(possibles),
total_bindings(new_possibles)),
file=output)
if False:
print_c(" *", file=output)
for terms in possibles:
print_c(" *", file=output)
print_c(" * all mappings for %s" % (terms,), file=output)
for poss in possibles[terms]:
print_c(" * %r -> %r" % (terms, poss), file=output)
print_c(" *", file=output)
print_c(" * minimal mappings for %s" % (terms,), file=output)
for poss in new_possibles[terms]:
print_c(" * %r -> %r" % (terms, poss), file=output)
print_c(" *", file=output)
print_c(" */", file=output)
possibles = new_possibles
# Select a binding using the heuristic that binding to smaller
# supersets will be better than larger supersets. An exhaustive
# search is 'too expensive' at this point.
binding_map = {}
for terms in possibles:
binding_map[terms] = 0
for terms in possibles:
best_i = 0
best_len = -1
possible_len = len(possibles[terms])
# If we have a choice of binding for this
# set of terminals, select the one with
# the smallest superset
if possible_len > 1:
for i in range(len(possibles[terms])):
super = possibles[terms][i]
# Heuristic - select smaller superset
l = len(super)
if best_len == -1 or l < best_len:
best_i = i
best_len = l
binding_map[terms] = best_i
# Construct the final binding and non-terminal table
best_binding_simple = pick_binding_simple(possibles, binding_map)
best_table_simple = non_terminal_table(terminals, terminal_map, best_binding_simple)
best_len_simple = non_terminal_size(best_table_simple)
return (best_binding_simple, best_table_simple)
def dump_c(grammar, parse_table, file=sys.stdout, filename=""):
output=file
terminals = get_terminals(grammar)
num_terminals = len(terminals)
non_terminals = get_non_terminals(grammar)
num_non_terminals = len(non_terminals)
actions = get_actions(grammar)
num_actions = len(actions)
print_c("/* %d terminals %d non_terminals %d actions (%d duplicates) %d parse table entries */" %
(num_terminals, num_non_terminals, num_actions, count_actions(grammar) - num_actions, len(parse_table)), file=output)
print_c("", file=output)
print_c("#if !defined(GRAMMAR_TABLE) && !defined(TOKEN_NAMES) && !defined(PARSE_CODE)", file=output)
print_c("typedef enum {", file=output)
print_c(" TOKEN_NONE = 0,", file=output)
token_value = {}
value = 1
first_terminal = value
for terminal in terminals:
token_value[terminal] = value
print_c(" %s = %d," % (terminal_name(terminal), value), file=output)
value += 1
first_non_terminal = value
print_c(" FIRST_NON_TERMINAL = %d," % first_non_terminal, file=output)
for non_terminal in non_terminals:
token_value[non_terminal] = value
print_c(" %s = %d," % (non_terminal_name(non_terminal), value), file=output)
value += 1
print_c(" FIRST_ACTION = %d," % value, file=output)
for action in actions:
token_value[compress_action(action)] = value
print_c(" %s = %d, // %s" %
(action_name(token_value, action), value, compress_action(action)), file=output)
value += 1
print_c("} __attribute__((packed)) token_t;", file=output)
print_c("#endif", file=output)
print_c("", file=output)
print_c("#ifdef GRAMMAR_TABLE", file=output)
print_c("#undef GRAMMAR_TABLE", file=output)
prod_map = {};
# Compute total size of production table to know what padding we'll need
prod_handled = {}
total_tokens = 0;
for key in parse_table:
if len(parse_table[key]) == 0:
continue
prod = parse_table[key] + (key[1],)
if prod not in prod_handled:
total_tokens += 2 + len(prod)
prod_handled[prod] = True
prod_shift = 0
while 1 << (8 + prod_shift) < total_tokens:
prod_shift += 1
prod_round = 1 << prod_shift
print_c("#ifndef PARSE_TABLE_DECLARATION", file=output)
print_c("#define PARSE_TABLE_DECLARATION(n) n", file=output)
print_c("#endif", file=output)
#
# Dump production table.
#
# This table contains all of the productions in the grammar.
# When the top of the parse stack is a non-terminal, the
# production matching that non-terminal and the current input
# token replaces the top of the parse stack.
#
# Each production is stored in reverse order so that the
# tokens can be simply pushed in order. The productions are
# terminated with TOKEN_NONE, and then padded to a multiple
# of a power of two tokens so that the index into this
# table can be stored in a single byte.
#
print_c("/*", file=output);
print_c(" * Parse table", file=output);
print_c(" *", file=output);
for key in parse_table:
terminal = key[0]
non_terminal = key[1]
print_c(" * %-12s, %-12s" % (terminal, non_terminal), end='', file=output)
prod = parse_table[key]
if not prod:
print_c("()", end='', file=output)
for token in prod:
name = token
if is_action(token):
name = action_name(token_value, token)
print_c(" %s," % name, end='', file=output)
print_c("", file=output)
print_c(" */", file=output)
print_c("static const token_t PARSE_TABLE_DECLARATION(production_table)[] = {", file=output);
prod_index = 0
for key in parse_table:
prod = parse_table[key] + (key[1],)
if prod not in prod_map:
prod_map[prod] = prod_index
print_c(" /* %4d */ " % prod_index, end='', file=output)
for token in prod[::-1]:
print_c(" %s," % token_name(token_value, token), end='', file=output)
prod_index += 1
# Pad the production with TOKEN_NONE to
# allow a single byte to index this table
#
p = pad(prod_index + 1, prod_round)
for i in range(0,p):
print_c(" TOKEN_NONE,", end='', file=output)
prod_index += 1
print_c(" TOKEN_NONE,", file=output)
prod_index += 1
print_c("};", file=output)
if num_non_terminals < 255 and num_terminals < 255:
token_key_type = "uint8_t"
else:
token_key_type = "uint16_t"
print_c("typedef %s token_key_t;" % token_key_type, file=output)
print_c("#define production_index(i) ((i) << %d)" % prod_shift, file=output)
best_binding, best_table = optimize(grammar, parse_table, terminals, non_terminals, output)
best_len = non_terminal_size(best_table)
best_shift = 0
while ((256 - 2) << best_shift) < best_len:
best_shift += 1
best_round = 1 << best_shift
print_c("#define non_terminal_index(i) ((i) << %d)" % best_shift, file=output)
print_c("static const uint8_t PARSE_TABLE_DECLARATION(non_terminal_table)[] = {", file=output)
#
# Dump the table mapping non-terminals to productions
#
# This table is indexed by the terminal table so that
# the entries need not include the terminal value as well
#
best_indices = {}
best_index = 0
for terms, prods in best_table.items():
best_indices[terms] = best_index
# Add a comment marking the start of the table
# entries for this terminal set
print_c(" /* %d: (%s) */" %
(best_index, terminal_names(terms)),
file=output)
# Dump out production table indices
#
for prod_ent in prods:
non_terminal, prod = prod_ent
key = prod + (non_terminal,)
print_c(" %3d, /* %18s:" %
(prod_map[key] >> prod_shift,
non_terminal),
end='', file=output)
for t in prod:
name = t
if is_action(t):
name = action_name(token_value, t)
print_c(" %s" % name, end='', file=output)
print_c(" */", file=output)
best_index += 1
if terms in best_binding:
next_terms = best_binding[terms]
print_c(" 0xfe, %3d, /* %s */" %
(best_indices[next_terms] >> best_shift,
terminal_names(next_terms)),
file=output)
best_index += 2
else:
print_c(" 0xff,", file=output)
best_index += 1
p = pad(best_index, best_round)
for i in range(p):
print_c(" 0xff,", file=output)
best_index += 1
print_c("", file=output)
print_c("};", file=output)
print_c("#define NON_TERMINAL_SIZE %d" % best_index, file=output)
#
# Dump the table mapping each terminal to a set of
# non-terminal/production bindings
#
# This table holds indices into the non-terminal table cooresponding
# to each terminal.
#
print_c("static const uint8_t PARSE_TABLE_DECLARATION(terminal_table)[] = {", file=output)
for terminal in terminals:
terms = (terminal,)
if terms in best_indices:
print_c(" [%s] = %d," %
(terminal_name(terminal),
best_indices[terms] >> best_shift),
file=output)
print_c(" [TOKEN_NONE] = %d," % (best_index >> best_shift), file=output)
print_c("};", file=output);
print_c("#endif /* GRAMMAR_TABLE */", file=output)
print_c("", file=output)
#
# Dump a table of token names.
#
# This is not usually included in the resulting program,
# but can be useful for debugging
#
print_c("#ifdef TOKEN_NAMES", file=output)
print_c("#undef TOKEN_NAMES", file=output)
print_c("#define token_name(a) token_names[a]", file=output);
print_c("static const char *const token_names[] = {", file=output)
print_c(' 0,', file=output);
for terminal in terminals:
print_c(' "%s",' % (terminal), file=output)
for non_terminal in non_terminals:
print_c(' "%s",' % (non_terminal), file=output)
print_c("};", file=output)
print_c("#endif /* TOKEN_NAMES */", file=output)
print_c("", file=output)
#
# Dump the parsing code
#
# This is the parse_code from above with
# all of the actions included at the right spot
#
print_c("#ifdef PARSE_CODE", file=output)
print_c("#undef PARSE_CODE", file=output)
actions_loc = parse_code.find(actions_marker)
first_bit = parse_code[:actions_loc]
last_bit = parse_code[actions_loc + len(actions_marker):]
print_c("%s" % first_bit, end='', file=output)
for action in actions:
print_c(" case %s:" % action_name(token_value, action), file=output)
print_c('#line %d "%s"' % (action_line(action), lex_file_name), file=output)
print_c(" %s; break;" % action_value(action), file=output)
print_c('#line %d "%s"' % (c_line + 1, filename), file=output)
print_c("%s" % last_bit, end='', file=output)
print_c("#endif /* PARSE_CODE */", file=output)
def main():
global lex_file
global lex_file_name
parser = argparse.ArgumentParser()
parser.add_argument("input", help="Grammar input file")
parser.add_argument("-o", "--output", help="Parser data output file")
parser.add_argument("-f", "--format", help="Parser output format (c, python)")
parser.add_argument("-D", "--define", action='append', help="Define pre-processor symbol")
args = parser.parse_args()
if args.define:
for name in args.define:
define_pp(name)
lex_file = open(args.input, 'r')
lex_file_name = args.input
output = sys.stdout
outputname = ""
format = 'c'
if not args.format or args.format == 'c':
format='c'
elif args.format == 'python':
format='python'
else:
error("Invalid output format %r" % args.format)
grammar = lola()
parse_table = ll(grammar)
if args.output:
outputname = args.output
output = open(args.output, 'w')
if format == 'c':
dump_c(grammar, parse_table, file=output, filename=outputname)
elif format == 'python':
dump_python(grammar, parse_table, file=output)
main()
lola-1.6/pycalc.py 0000664 0000000 0000000 00000007552 14141267051 0014146 0 ustar 00root root 0000000 0000000 #!/usr/bin/env python3
#
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
import sys
lex_c = False
def getc():
global lex_c
if lex_c:
c = lex_c
lex_c = False
else:
c = sys.stdin.read(1)
return c
def ungetc(c):
global lex_c
lex_c = c
lex_value = False
def lex():
global lex_value
while True:
c = getc()
if c == '':
return 'END'
if c == '+':
return "PLUS"
if c == '-':
return "MINUS"
if c == '*':
return "TIMES"
if c == '/':
return "DIVIDE"
if c == '(':
return "OP"
if c == ')':
return "CP"
if c == '\n':
return "NL"
if '0' <= c and c <= '9':
v = ord(c) - ord('0')
while True:
c = getc()
if '0' <= c and c <= '9':
v = v * 10 + ord(c) - ord('0')
else:
ungetc(c)
break;
lex_value = v
return "NUMBER"
value_stack = ()
def head(s):
return s[0]
def rest(s):
return s[1:]
def push(v):
global value_stack
value_stack = (v,) + value_stack
def pop():
global value_stack
v = head(value_stack)
value_stack = rest(value_stack)
return v
#
# lines : line lines
# |
#
# expr : term PLUS expr
# | term MINUS expr
# | term
#
# expr : term expr-p
# expr-p: PLUS expr
# | MINUS expr
# |
from pycalc_gram import *
def is_non_terminal(item):
return item[0].islower()
def is_terminal(item):
return item[0].isupper()
def is_action(item):
return item[0] == '@'
def error(msg):
print(msg)
exit(1)
def test():
global lex_value
global value_stack
global parse_table
table = parse_table
stack = ('start',)
token = False
while True:
if stack:
top = head(stack)
stack = rest(stack)
else:
top = False
if top and is_action(top):
if top == "@PUSH":
push(lex_value)
elif top == "@ADD":
push(pop() + pop())
elif top == "@SUBTRACT":
a = pop()
b = pop()
push(b - a)
elif top == "@TIMES":
push(pop() * pop())
elif top == "@DIVIDE":
a = pop()
b = pop()
push(b / a)
elif top == "@NEGATE":
a = pop()
push(-a)
elif top == "@PRINT":
print("= %r" % pop())
continue
if not token:
token = lex()
if not top:
if token == 'END':
return
error("parse stack empty at %r" % token)
if is_terminal(top):
if top == token:
token = False
else:
error("parse error. got %r expected %r" % (token, top))
else:
key = (token, top)
if key not in table:
error("parse error at %r %r" % (token, top))
stack = table[key] + stack
test()
lola-1.6/pycalc_gram.ll 0000664 0000000 0000000 00000002052 14141267051 0015121 0 ustar 00root root 0000000 0000000 #
# Copyright © 2019 Keith Packard
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#
start : line start
|
;
line : expr @PRINT@ NL
| NL
;
expr : term expr-p
;
expr-p : PLUS term @ADD@ expr-p
| MINUS term @SUBTRACT@ expr-p
|
;
term : fact term-p
;
term-p : TIMES fact @TIMES@ term-p
| DIVIDE fact @DIVIDE@ term-p
|
;
fact : OP expr CP
| MINUS fact @NEGATE@
| NUMBER @PUSH@
;
lola-1.6/test/ 0000775 0000000 0000000 00000000000 14141267051 0013267 5 ustar 00root root 0000000 0000000 lola-1.6/test/badgram 0000664 0000000 0000000 00000000312 14141267051 0014603 0 ustar 00root root 0000000 0000000 ;
; this grammar is left recursive through the null production
; in bar -- it should elicit the error
;
; lola: left-recursive grammar for symbol foo
;
(
(foo (bar foo)
)
(bar (A B)
()
)
)
lola-1.6/test/calc.l,v 0000664 0000000 0000000 00000010535 14141267051 0014614 0 ustar 00root root 0000000 0000000 head 1.1;
access;
symbols;
locks
keithp:1.1; strict;
comment @ * @;
1.1
date 94.12.13.17.40.05; author keithp; state Exp;
branches;
next ;
desc
@@
1.1
log
@Initial revision
@
text
@#!/usr/local/klisp
;
; calc - lisp 4 function calculator
;
;
; data abstraction
;
; a non terminal is a symbol bound to a list of lists
; a terminal is a symbol not bound to a list
; an action is a string
;
(defun non-terminalp (item)
(and (symbolp item)
(boundp item)
(listp (eval item))
)
)
(defun terminalp (item)
(or (null item)
(and (symbolp item)
(not (non-terminalp item))
)
)
)
(defun actionp (item)
(stringp item)
)
(defun null-production (p)
(if (null p)
t
elseif (stringp (car p))
(null-production (cdr p))
else
nil
)
)
(defun start-symbolp (item) (equal item start-symbol))
(defun parser (parse-table start-symbol end-token)
(let ((stack (list start-symbol end-token))
(input-token (lex))
(table-entry)
(tos)
)
(while stack
; (patom "stack is ")
; (print stack)
(setq tos (car stack)) (setq stack (cdr stack))
(if (non-terminalp tos)
(setq table-entry (dictionary-lookup parse-table
(list input-token tos))
)
(if (null table-entry)
(error (strcat "parser: error on " (sprint input-token)))
)
; (patom " pushing production ") (print (cadr table-entry)) (terpr)
(cond ((cadr table-entry)
(setq stack (conc (cadr table-entry) stack))
)
)
elseif (actionp tos)
; (patom "token is ") (print input-token)
; (patom " performing action ") (print tos) (terpr)
(action tos input-token)
elseif (terminalp tos)
(if (= tos input-token)
; (patom " matching token ") (print tos) (terpr)
(if (not (= tos end-token))
(setq input-token (lex))
)
else
(error (strcat "parser error on " (sprint input-token)))
)
)
)
)
)
(defun lex ()
(let ((char (getchar)))
(cond ((or (= char ~ )
(= char ~\t )
)
(lex)
)
((or (= char nil)
(= char -1)
)
(symbol "$" parse-dictionary)
)
(t
(symbol (scons char nil) parse-dictionary)
)
)
)
)
(setq value-stack nil)
(defun pop-stack ()
(let ((t (car value-stack)))
(setq value-stack (cdr value-stack))
t)
)
(defun push-stack (t)
(setq value-stack (cons t value-stack))
t
)
(setq value-temp 0)
(defun action (name value)
(let ((t1) (t2))
(cond ((= "ADD" name)
(push-stack (+ (pop-stack) (pop-stack)))
)
((= "SUBTRACT" name)
(setq t1 (pop-stack))
(setq t2 (pop-stack))
(push-stack (- t2 t1))
)
((= "MULTIPLY" name)
(push-stack (* (pop-stack) (pop-stack)))
)
((= "DIVIDE" name)
(setq t1 (pop-stack))
(setq t2 (pop-stack))
(push-stack (/ t2 t1))
)
((= "PUSH" name)
(push-stack value-temp)
)
((= "NEGATE" name)
(push-stack (- 0 (pop-stack)))
)
((= "CLEAR" name)
(setq value-temp 0)
)
((= "ADD-DIGIT" name)
(setq value-temp (+ (* value-temp 10)
(- (scar (get-name value)) ~0)
)
)
)
((= "PRINT" name)
(print (pop-stack)) (terpr)
)
)
)
)
(defun init ()
(setq parse-table (new-dictionary))
(setq parse-dictionary (new-dictionary))
(setq end-token (symbol "$" parse-dictionary))
)
(defun cadaar (l) (car (cdr (car (car l)))))
(defun bind-to-lists (atoms)
(cond (atoms (set (car atoms) '(foo)) (bind-to-lists (cdr atoms)))
(t nil)
)
)
(defun put-lists-into-parse-table (lists parse-table)
(cond (lists
(dictionary-insert parse-table (caar lists) (car lists))
(put-lists-into-parse-table (cdr lists) parse-table)
)
(t nil)
)
)
(defun setup-calc (file-in)
(init)
(setq terminals (fread-dictionary file-in parse-dictionary))
(setq non-terminals (fread-dictionary file-in parse-dictionary))
(setq table (fread-dictionary file-in parse-dictionary))
(bind-to-lists non-terminals)
(setq start-symbol (cadaar table))
(put-lists-into-parse-table table parse-table)
)
(defun calc ()
(cond ((not (boundp 'start-symbol))
(let ((file-in (fopen (strcat klisp-lib "/calc.parsetable") 'r)))
(setup-calc file-in)
(fclose file-in)
)
)
)
(parser parse-table (cadaar table) end-token)
)
@
lola-1.6/test/calc.parsetable 0000664 0000000 0000000 00000006741 14141267051 0016245 0 ustar 00root root 0000000 0000000 ($ |(| |)| |\n| - + / * |0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
(lines expr exprp term termp fact int digits more-digits digit)
(
((+ lines) (expr "PRINT" |\n| lines))
((- lines) (expr "PRINT" |\n| lines))
((|9| lines) (expr "PRINT" |\n| lines))
((|8| lines) (expr "PRINT" |\n| lines))
((|7| lines) (expr "PRINT" |\n| lines))
((|6| lines) (expr "PRINT" |\n| lines))
((|5| lines) (expr "PRINT" |\n| lines))
((|4| lines) (expr "PRINT" |\n| lines))
((|3| lines) (expr "PRINT" |\n| lines))
((|2| lines) (expr "PRINT" |\n| lines))
((|1| lines) (expr "PRINT" |\n| lines))
((|0| lines) (expr "PRINT" |\n| lines))
((|(| lines) (expr "PRINT" |\n| lines))
((|\n| lines) (|\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int "PUSH"))
((|8| fact) (int "PUSH"))
((|7| fact) (int "PUSH"))
((|6| fact) (int "PUSH"))
((|5| fact) (int "PUSH"))
((|4| fact) (int "PUSH"))
((|3| fact) (int "PUSH"))
((|2| fact) (int "PUSH"))
((|1| fact) (int "PUSH"))
((|0| fact) (int "PUSH"))
((- fact) (- fact "NEGATE"))
((+ fact) (+ fact))
((|9| int) ("CLEAR" digits))
((|8| int) ("CLEAR" digits))
((|7| int) ("CLEAR" digits))
((|6| int) ("CLEAR" digits))
((|5| int) ("CLEAR" digits))
((|4| int) ("CLEAR" digits))
((|3| int) ("CLEAR" digits))
((|2| int) ("CLEAR" digits))
((|1| int) ("CLEAR" digits))
((|0| int) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit more-digits))
((|8| digits) ("ADD-DIGIT" digit more-digits))
((|7| digits) ("ADD-DIGIT" digit more-digits))
((|6| digits) ("ADD-DIGIT" digit more-digits))
((|5| digits) ("ADD-DIGIT" digit more-digits))
((|4| digits) ("ADD-DIGIT" digit more-digits))
((|3| digits) ("ADD-DIGIT" digit more-digits))
((|2| digits) ("ADD-DIGIT" digit more-digits))
((|1| digits) ("ADD-DIGIT" digit more-digits))
((|0| digits) ("ADD-DIGIT" digit more-digits))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
)
lola-1.6/test/digits 0000664 0000000 0000000 00000000346 14141267051 0014500 0 ustar 00root root 0000000 0000000 ;
; this is the simplest case of a
; grammar which elicits the recursive
; follow-set warning. This must be
; run through flo before lola to
; factor out the common left sub-
; expression
;
(
(digits (digit digits)
(digit)
)
)
lola-1.6/test/dtest 0000664 0000000 0000000 00000000443 14141267051 0014336 0 ustar 00root root 0000000 0000000 ;
; this is the simplest case of a
; grammar which elicits the recursive
; follow-set warning. This must be
; run through flo before lola to
; factor out the common left sub-
; expression
;
(
(digits (digit digits)
(digit)
)
(digit (|0|)(|1|)(|2|)(|3|)(|4|)(|5|)(|6|)(|7|)(|8|)(|9|)
)
)
lola-1.6/test/dtest.t 0000664 0000000 0000000 00000001520 14141267051 0014575 0 ustar 00root root 0000000 0000000 (|9| |8| |7| |6| |5| |4| |3| |2| |1| |0| $)
(digits digit digitsp)
(
((|9| digits) (digit digitsp))
((|8| digits) (digit digitsp))
((|7| digits) (digit digitsp))
((|6| digits) (digit digitsp))
((|5| digits) (digit digitsp))
((|4| digits) (digit digitsp))
((|3| digits) (digit digitsp))
((|2| digits) (digit digitsp))
((|1| digits) (digit digitsp))
((|0| digits) (digit digitsp))
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
((|9| digitsp) (digits))
((|8| digitsp) (digits))
((|7| digitsp) (digits))
((|6| digitsp) (digits))
((|5| digitsp) (digits))
((|4| digitsp) (digits))
((|3| digitsp) (digits))
((|2| digitsp) (digits))
((|1| digitsp) (digits))
((|0| digitsp) (digits))
(($ digitsp) ())
)
lola-1.6/test/float 0000664 0000000 0000000 00000001510 14141267051 0014314 0 ustar 00root root 0000000 0000000 ;
; this grammar recognises floating point
; expressions involving +,-,*,/ and unary -
;
(
(expr (term exprp)
)
(exprp (+ term "ADD" exprp)
(- term "SUBTRACT" exprp)
()
)
(term (fact termp)
)
(termp (* fact "MULTIPLY" termp)
(/ fact "DIVIDE" termp)
()
)
(fact (|(| expr |)|)
(float "PUSH")
(- fact "NEGATE")
)
(float (opt-sign . "CLEAR" "POINT" digits opt-exp)
(opt-sign "CLEAR" digits opt-. opt-exp)
)
(opt-sign ("POSITIVE" +)
("NEGATIVE" -)
()
)
(opt-digits (digits)
()
)
(digits ("ADD-DIGIT" digit more-digits)
("ADD-DIGIT" digit)
)
(more-digits ("ADD-DIGIT" digit more-digits)
()
)
(digit (|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|) (|8|) (|9|)
)
(opt-exp ("EXP" exp)
()
)
(exp (eE opt-sign "CLEAR" digits)
)
(eE (e)
(E)
)
(opt-. (. "POINT" opt-digits)
()
)
)
lola-1.6/test/float.g 0000664 0000000 0000000 00000013035 14141267051 0014546 0 ustar 00root root 0000000 0000000 (|(| |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| |)| $ - + / * E e .)
(expr exprp term termp fact float opt-sign opt-digits digits more-digits digit opt-exp exp eE opt-. floatp digitsp)
(
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((. expr) (term exprp))
((+ expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
(($ exprp) ())
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((. term) (fact termp))
((+ term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
(($ termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (float "PUSH"))
((|8| fact) (float "PUSH"))
((|7| fact) (float "PUSH"))
((|6| fact) (float "PUSH"))
((|5| fact) (float "PUSH"))
((|4| fact) (float "PUSH"))
((|3| fact) (float "PUSH"))
((|2| fact) (float "PUSH"))
((|1| fact) (float "PUSH"))
((|0| fact) (float "PUSH"))
((. fact) (float "PUSH"))
((- fact) (float "PUSH"))
((+ fact) (float "PUSH"))
((- fact) (- fact "NEGATE"))
((|9| float) (opt-sign floatp))
((|8| float) (opt-sign floatp))
((|7| float) (opt-sign floatp))
((|6| float) (opt-sign floatp))
((|5| float) (opt-sign floatp))
((|4| float) (opt-sign floatp))
((|3| float) (opt-sign floatp))
((|2| float) (opt-sign floatp))
((|1| float) (opt-sign floatp))
((|0| float) (opt-sign floatp))
((. float) (opt-sign floatp))
((- float) (opt-sign floatp))
((+ float) (opt-sign floatp))
((+ opt-sign) ("POSITIVE" +))
((- opt-sign) ("NEGATIVE" -))
((|9| opt-sign) ())
((|8| opt-sign) ())
((|7| opt-sign) ())
((|6| opt-sign) ())
((|5| opt-sign) ())
((|4| opt-sign) ())
((|3| opt-sign) ())
((|2| opt-sign) ())
((|1| opt-sign) ())
((|0| opt-sign) ())
((. opt-sign) ())
((|9| opt-digits) (digits))
((|8| opt-digits) (digits))
((|7| opt-digits) (digits))
((|6| opt-digits) (digits))
((|5| opt-digits) (digits))
((|4| opt-digits) (digits))
((|3| opt-digits) (digits))
((|2| opt-digits) (digits))
((|1| opt-digits) (digits))
((|0| opt-digits) (digits))
((|)| opt-digits) ())
(($ opt-digits) ())
((- opt-digits) ())
((+ opt-digits) ())
((/ opt-digits) ())
((* opt-digits) ())
((E opt-digits) ())
((e opt-digits) ())
((|9| digits) ("ADD-DIGIT" digit digitsp))
((|8| digits) ("ADD-DIGIT" digit digitsp))
((|7| digits) ("ADD-DIGIT" digit digitsp))
((|6| digits) ("ADD-DIGIT" digit digitsp))
((|5| digits) ("ADD-DIGIT" digit digitsp))
((|4| digits) ("ADD-DIGIT" digit digitsp))
((|3| digits) ("ADD-DIGIT" digit digitsp))
((|2| digits) ("ADD-DIGIT" digit digitsp))
((|1| digits) ("ADD-DIGIT" digit digitsp))
((|0| digits) ("ADD-DIGIT" digit digitsp))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
(($ more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((E more-digits) ())
((e more-digits) ())
((. more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
((E opt-exp) ("EXP" exp))
((e opt-exp) ("EXP" exp))
((|)| opt-exp) ())
(($ opt-exp) ())
((- opt-exp) ())
((+ opt-exp) ())
((/ opt-exp) ())
((* opt-exp) ())
((E exp) (eE opt-sign "CLEAR" digits))
((e exp) (eE opt-sign "CLEAR" digits))
((e eE) (e))
((E eE) (E))
((. opt-.) (. "POINT" opt-digits))
((|)| opt-.) ())
(($ opt-.) ())
((- opt-.) ())
((+ opt-.) ())
((/ opt-.) ())
((* opt-.) ())
((E opt-.) ())
((e opt-.) ())
((. floatp) (. "CLEAR" "POINT" digits opt-exp))
((|9| floatp) ("CLEAR" digits opt-. opt-exp))
((|8| floatp) ("CLEAR" digits opt-. opt-exp))
((|7| floatp) ("CLEAR" digits opt-. opt-exp))
((|6| floatp) ("CLEAR" digits opt-. opt-exp))
((|5| floatp) ("CLEAR" digits opt-. opt-exp))
((|4| floatp) ("CLEAR" digits opt-. opt-exp))
((|3| floatp) ("CLEAR" digits opt-. opt-exp))
((|2| floatp) ("CLEAR" digits opt-. opt-exp))
((|1| floatp) ("CLEAR" digits opt-. opt-exp))
((|0| floatp) ("CLEAR" digits opt-. opt-exp))
((|)| digitsp) (more-digits))
(($ digitsp) (more-digits))
((- digitsp) (more-digits))
((+ digitsp) (more-digits))
((/ digitsp) (more-digits))
((* digitsp) (more-digits))
((E digitsp) (more-digits))
((e digitsp) (more-digits))
((. digitsp) (more-digits))
((|9| digitsp) (more-digits))
((|8| digitsp) (more-digits))
((|7| digitsp) (more-digits))
((|6| digitsp) (more-digits))
((|5| digitsp) (more-digits))
((|4| digitsp) (more-digits))
((|3| digitsp) (more-digits))
((|2| digitsp) (more-digits))
((|1| digitsp) (more-digits))
((|0| digitsp) (more-digits))
((|)| digitsp) ())
(($ digitsp) ())
((- digitsp) ())
((+ digitsp) ())
((/ digitsp) ())
((* digitsp) ())
((E digitsp) ())
((e digitsp) ())
((. digitsp) ())
)
lola-1.6/test/foofram 0000664 0000000 0000000 00000006741 14141267051 0014653 0 ustar 00root root 0000000 0000000 ($ |(| |)| |\n| - + / * |0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
(lines expr exprp term termp fact int digits more-digits digit)
(
((+ lines) (expr "PRINT" |\n| lines))
((- lines) (expr "PRINT" |\n| lines))
((|9| lines) (expr "PRINT" |\n| lines))
((|8| lines) (expr "PRINT" |\n| lines))
((|7| lines) (expr "PRINT" |\n| lines))
((|6| lines) (expr "PRINT" |\n| lines))
((|5| lines) (expr "PRINT" |\n| lines))
((|4| lines) (expr "PRINT" |\n| lines))
((|3| lines) (expr "PRINT" |\n| lines))
((|2| lines) (expr "PRINT" |\n| lines))
((|1| lines) (expr "PRINT" |\n| lines))
((|0| lines) (expr "PRINT" |\n| lines))
((|(| lines) (expr "PRINT" |\n| lines))
((|\n| lines) (|\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int "PUSH"))
((|8| fact) (int "PUSH"))
((|7| fact) (int "PUSH"))
((|6| fact) (int "PUSH"))
((|5| fact) (int "PUSH"))
((|4| fact) (int "PUSH"))
((|3| fact) (int "PUSH"))
((|2| fact) (int "PUSH"))
((|1| fact) (int "PUSH"))
((|0| fact) (int "PUSH"))
((- fact) (- fact "NEGATE"))
((+ fact) (+ fact))
((|9| int) ("CLEAR" digits))
((|8| int) ("CLEAR" digits))
((|7| int) ("CLEAR" digits))
((|6| int) ("CLEAR" digits))
((|5| int) ("CLEAR" digits))
((|4| int) ("CLEAR" digits))
((|3| int) ("CLEAR" digits))
((|2| int) ("CLEAR" digits))
((|1| int) ("CLEAR" digits))
((|0| int) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit more-digits))
((|8| digits) ("ADD-DIGIT" digit more-digits))
((|7| digits) ("ADD-DIGIT" digit more-digits))
((|6| digits) ("ADD-DIGIT" digit more-digits))
((|5| digits) ("ADD-DIGIT" digit more-digits))
((|4| digits) ("ADD-DIGIT" digit more-digits))
((|3| digits) ("ADD-DIGIT" digit more-digits))
((|2| digits) ("ADD-DIGIT" digit more-digits))
((|1| digits) ("ADD-DIGIT" digit more-digits))
((|0| digits) ("ADD-DIGIT" digit more-digits))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
)
lola-1.6/test/grammar 0000664 0000000 0000000 00000000375 14141267051 0014645 0 ustar 00root root 0000000 0000000 ((E (T Ep) )
(Ep (+ T "ADD" Ep) (- T "SUBTRACT" Ep) () )
(T (F Tp) )
(Tp (* F "TIMES" Tp) (/ F "DIVIDE" Tp) () )
(F ( |(| E |)| ) (- F "NEGATE") ("PUSH" id) )
)
lola-1.6/test/in 0000664 0000000 0000000 00000001401 14141267051 0013614 0 ustar 00root root 0000000 0000000 (
(expr
(term exprp)
)
(exprp
(+ term "ADD" exprp)
(- term "SUBTRACT" exprp)
()
)
(term
(fact termp)
)
(termp
(* fact "MULTIPLY" termp)
(/ fact "DIVIDE" termp)
()
)
(fact
(|(| expr |)|)
(float "PUSH")
(- fact "NEGATE")
)
(float
(opt-sign floatp)
)
(opt-sign
("POSITIVE" +)
("NEGATIVE" -)
()
)
(opt-digits
(digits)
()
)
(digits
("ADD-DIGIT" digit digitsp)
)
(more-digits
("ADD-DIGIT" digit more-digits)
()
)
(digit
(|0|)
(|1|)
(|2|)
(|3|)
(|4|)
(|5|)
(|6|)
(|7|)
(|8|)
(|9|)
)
(opt-exp
("EXP" exp)
()
)
(exp
(eE opt-sign "CLEAR" digits)
)
(eE
(e)
(E)
)
(opt-.
(. "POINT" opt-digits)
()
)
(floatp
(. "CLEAR" "POINT" digits opt-exp)
("CLEAR" digits opt-. opt-exp)
)
(digitsp
(more-digits)
()
)
)
lola-1.6/test/int 0000664 0000000 0000000 00000001121 14141267051 0013777 0 ustar 00root root 0000000 0000000 ;
; this grammar recognises integer
; expressions involving +,-,*,/ and unary -
;
(
(lines (expr "PRINT" \n lines)
(\n lines)
()
)
(expr (term exprp)
)
(exprp (+ term "ADD" exprp)
(- term "SUBTRACT" exprp)
()
)
(term (fact termp)
)
(termp (* fact "MULTIPLY" termp)
(/ fact "DIVIDE" termp)
()
)
(fact (|(| expr |)|)
(int "PUSH")
(- fact "NEGATE")
(+ fact)
)
(int ("CLEAR" digits)
)
(digits ("ADD-DIGIT" digit more-digits)
)
(more-digits ("ADD-DIGIT" digit more-digits)
()
)
(digit (|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|) (|8|) (|9|)
)
)
lola-1.6/test/int.f 0000664 0000000 0000000 00000001022 14141267051 0014223 0 ustar 00root root 0000000 0000000 (
(lines
(expr "PRINT" |\n| lines)
()
)
(expr
(term exprp)
)
(exprp
(+ term "ADD" exprp)
(- term "SUBTRACT" exprp)
()
)
(term
(fact termp)
)
(termp
(* fact "MULTIPLY" termp)
(/ fact "DIVIDE" termp)
()
)
(fact
(|(| expr |)|)
(int "PUSH")
(- fact "NEGATE")
(+ fact)
)
(int
("CLEAR" digits)
)
(digits
("ADD-DIGIT" digit digitsp)
)
(more-digits
("ADD-DIGIT" digit more-digits)
()
)
(digit
(|0|)
(|1|)
(|2|)
(|3|)
(|4|)
(|5|)
(|6|)
(|7|)
(|8|)
(|9|)
)
(digitsp
(more-digits)
()
)
)
lola-1.6/test/int.g 0000664 0000000 0000000 00000006741 14141267051 0014241 0 ustar 00root root 0000000 0000000 ($ |(| |)| |\n| - + / * |0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
(lines expr exprp term termp fact int digits more-digits digit)
(
((+ lines) (expr "PRINT" |\n| lines))
((- lines) (expr "PRINT" |\n| lines))
((|9| lines) (expr "PRINT" |\n| lines))
((|8| lines) (expr "PRINT" |\n| lines))
((|7| lines) (expr "PRINT" |\n| lines))
((|6| lines) (expr "PRINT" |\n| lines))
((|5| lines) (expr "PRINT" |\n| lines))
((|4| lines) (expr "PRINT" |\n| lines))
((|3| lines) (expr "PRINT" |\n| lines))
((|2| lines) (expr "PRINT" |\n| lines))
((|1| lines) (expr "PRINT" |\n| lines))
((|0| lines) (expr "PRINT" |\n| lines))
((|(| lines) (expr "PRINT" |\n| lines))
((|\n| lines) (|\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int "PUSH"))
((|8| fact) (int "PUSH"))
((|7| fact) (int "PUSH"))
((|6| fact) (int "PUSH"))
((|5| fact) (int "PUSH"))
((|4| fact) (int "PUSH"))
((|3| fact) (int "PUSH"))
((|2| fact) (int "PUSH"))
((|1| fact) (int "PUSH"))
((|0| fact) (int "PUSH"))
((- fact) (- fact "NEGATE"))
((+ fact) (+ fact))
((|9| int) ("CLEAR" digits))
((|8| int) ("CLEAR" digits))
((|7| int) ("CLEAR" digits))
((|6| int) ("CLEAR" digits))
((|5| int) ("CLEAR" digits))
((|4| int) ("CLEAR" digits))
((|3| int) ("CLEAR" digits))
((|2| int) ("CLEAR" digits))
((|1| int) ("CLEAR" digits))
((|0| int) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit more-digits))
((|8| digits) ("ADD-DIGIT" digit more-digits))
((|7| digits) ("ADD-DIGIT" digit more-digits))
((|6| digits) ("ADD-DIGIT" digit more-digits))
((|5| digits) ("ADD-DIGIT" digit more-digits))
((|4| digits) ("ADD-DIGIT" digit more-digits))
((|3| digits) ("ADD-DIGIT" digit more-digits))
((|2| digits) ("ADD-DIGIT" digit more-digits))
((|1| digits) ("ADD-DIGIT" digit more-digits))
((|0| digits) ("ADD-DIGIT" digit more-digits))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
)
lola-1.6/test/int.g2 0000664 0000000 0000000 00000006741 14141267051 0014323 0 ustar 00root root 0000000 0000000 ($ |(| |)| |\n| - + / * |0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
(lines expr exprp term termp fact int digits more-digits digit)
(
((+ lines) (expr "PRINT" |\n| lines))
((- lines) (expr "PRINT" |\n| lines))
((|9| lines) (expr "PRINT" |\n| lines))
((|8| lines) (expr "PRINT" |\n| lines))
((|7| lines) (expr "PRINT" |\n| lines))
((|6| lines) (expr "PRINT" |\n| lines))
((|5| lines) (expr "PRINT" |\n| lines))
((|4| lines) (expr "PRINT" |\n| lines))
((|3| lines) (expr "PRINT" |\n| lines))
((|2| lines) (expr "PRINT" |\n| lines))
((|1| lines) (expr "PRINT" |\n| lines))
((|0| lines) (expr "PRINT" |\n| lines))
((|(| lines) (expr "PRINT" |\n| lines))
((|\n| lines) (|\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int "PUSH"))
((|8| fact) (int "PUSH"))
((|7| fact) (int "PUSH"))
((|6| fact) (int "PUSH"))
((|5| fact) (int "PUSH"))
((|4| fact) (int "PUSH"))
((|3| fact) (int "PUSH"))
((|2| fact) (int "PUSH"))
((|1| fact) (int "PUSH"))
((|0| fact) (int "PUSH"))
((- fact) (- fact "NEGATE"))
((+ fact) (+ fact))
((|9| int) ("CLEAR" digits))
((|8| int) ("CLEAR" digits))
((|7| int) ("CLEAR" digits))
((|6| int) ("CLEAR" digits))
((|5| int) ("CLEAR" digits))
((|4| int) ("CLEAR" digits))
((|3| int) ("CLEAR" digits))
((|2| int) ("CLEAR" digits))
((|1| int) ("CLEAR" digits))
((|0| int) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit more-digits))
((|8| digits) ("ADD-DIGIT" digit more-digits))
((|7| digits) ("ADD-DIGIT" digit more-digits))
((|6| digits) ("ADD-DIGIT" digit more-digits))
((|5| digits) ("ADD-DIGIT" digit more-digits))
((|4| digits) ("ADD-DIGIT" digit more-digits))
((|3| digits) ("ADD-DIGIT" digit more-digits))
((|2| digits) ("ADD-DIGIT" digit more-digits))
((|1| digits) ("ADD-DIGIT" digit more-digits))
((|0| digits) ("ADD-DIGIT" digit more-digits))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
)
lola-1.6/test/intn 0000664 0000000 0000000 00000000757 14141267051 0014173 0 ustar 00root root 0000000 0000000 ;
; this grammar recognises integer
; expressions involving +,-,*,/ and unary -
;
(
(lines (expr |\n| lines)
()
)
(expr (term exprp)
)
(exprp (+ term exprp)
(- term exprp)
()
)
(term (fact termp)
)
(termp (* fact termp)
(/ fact termp)
()
)
(fact (|(| expr |)|)
(int )
(- fact )
(+ fact)
)
(int (digits)
)
(digits (digit more-digits)
)
(more-digits (digit more-digits)
()
)
(digit (|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|) (|8|) (|9|)
)
)
lola-1.6/test/intn.f 0000664 0000000 0000000 00000000665 14141267051 0014415 0 ustar 00root root 0000000 0000000 (
(lines
(expr |\n| lines)
()
)
(expr
(term exprp)
)
(exprp
(+ term exprp)
(- term exprp)
()
)
(term
(fact termp)
)
(termp
(* fact termp)
(/ fact termp)
()
)
(fact
(|(| expr |)|)
(int)
(- fact)
(+ fact)
)
(int
(digits)
)
(digits
(digit digitsp)
)
(more-digits
(digit more-digits)
()
)
(digit
(|0|)
(|1|)
(|2|)
(|3|)
(|4|)
(|5|)
(|6|)
(|7|)
(|8|)
(|9|)
)
(digitsp
(more-digits)
()
)
)
lola-1.6/test/intn.g 0000664 0000000 0000000 00000011312 14141267051 0014405 0 ustar 00root root 0000000 0000000 non-terminal lines
first-set for production (expr |\n| lines):
(|(| |0| |1| |2| |3| |4| |5| |6| |7| |8| |9| - +)
first-set for production nil:
(nil)
follow-set for production nil:
($)
non-terminal expr
first-set for production (term exprp):
(|(| |0| |1| |2| |3| |4| |5| |6| |7| |8| |9| - +)
non-terminal exprp
first-set for production (+ term exprp):
(+)
first-set for production (- term exprp):
(-)
first-set for production nil:
(nil)
follow-set for production nil:
(|\n| |)|)
non-terminal term
first-set for production (fact termp):
(|(| |0| |1| |2| |3| |4| |5| |6| |7| |8| |9| - +)
non-terminal termp
first-set for production (* fact termp):
(*)
first-set for production (/ fact termp):
(/)
first-set for production nil:
(nil)
follow-set for production nil:
(+ - |\n| |)|)
non-terminal fact
first-set for production (|(| expr |)|):
(|(|)
first-set for production (int):
(|0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
first-set for production (- fact):
(-)
first-set for production (+ fact):
(+)
non-terminal int
first-set for production (digits):
(|0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
non-terminal digits
first-set for production (digit more-digits):
(|0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
non-terminal more-digits
first-set for production (digit more-digits):
(|0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
first-set for production nil:
(nil)
follow-set for production nil:
(* / + - |\n| |)|)
non-terminal digit
first-set for production (|0|):
(|0|)
first-set for production (|1|):
(|1|)
first-set for production (|2|):
(|2|)
first-set for production (|3|):
(|3|)
first-set for production (|4|):
(|4|)
first-set for production (|5|):
(|5|)
first-set for production (|6|):
(|6|)
first-set for production (|7|):
(|7|)
first-set for production (|8|):
(|8|)
first-set for production (|9|):
(|9|)
($ |(| |)| |\n| - + / * |0| |1| |2| |3| |4| |5| |6| |7| |8| |9|)
(lines expr exprp term termp fact int digits more-digits digit)
(
((+ lines) (expr |\n| lines))
((- lines) (expr |\n| lines))
((|9| lines) (expr |\n| lines))
((|8| lines) (expr |\n| lines))
((|7| lines) (expr |\n| lines))
((|6| lines) (expr |\n| lines))
((|5| lines) (expr |\n| lines))
((|4| lines) (expr |\n| lines))
((|3| lines) (expr |\n| lines))
((|2| lines) (expr |\n| lines))
((|1| lines) (expr |\n| lines))
((|0| lines) (expr |\n| lines))
((|(| lines) (expr |\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term exprp))
((- exprp) (- term exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact termp))
((/ termp) (/ fact termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int))
((|8| fact) (int))
((|7| fact) (int))
((|6| fact) (int))
((|5| fact) (int))
((|4| fact) (int))
((|3| fact) (int))
((|2| fact) (int))
((|1| fact) (int))
((|0| fact) (int))
((- fact) (- fact))
((+ fact) (+ fact))
((|9| int) (digits))
((|8| int) (digits))
((|7| int) (digits))
((|6| int) (digits))
((|5| int) (digits))
((|4| int) (digits))
((|3| int) (digits))
((|2| int) (digits))
((|1| int) (digits))
((|0| int) (digits))
((|9| digits) (digit more-digits))
((|8| digits) (digit more-digits))
((|7| digits) (digit more-digits))
((|6| digits) (digit more-digits))
((|5| digits) (digit more-digits))
((|4| digits) (digit more-digits))
((|3| digits) (digit more-digits))
((|2| digits) (digit more-digits))
((|1| digits) (digit more-digits))
((|0| digits) (digit more-digits))
((|9| more-digits) (digit more-digits))
((|8| more-digits) (digit more-digits))
((|7| more-digits) (digit more-digits))
((|6| more-digits) (digit more-digits))
((|5| more-digits) (digit more-digits))
((|4| more-digits) (digit more-digits))
((|3| more-digits) (digit more-digits))
((|2| more-digits) (digit more-digits))
((|1| more-digits) (digit more-digits))
((|0| more-digits) (digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
)
lola-1.6/test/intr 0000664 0000000 0000000 00000000764 14141267051 0014175 0 ustar 00root root 0000000 0000000 ;
; this grammar recognises integer
; expressions involving +,-,*,/ and unary -
;
(
(lines (expr "PRINT" \n lines)
(\n lines)
()
)
(expr (term + term "ADD")
(term - term "SUBTRACT")
(term)
)
(term (fact * fact "MULTIPLY")
(fact / fact "DIVIDE")
(fact)
)
(fact (|(| expr |)|)
(int "PUSH")
(- fact "NEGATE")
)
(int ("CLEAR" "ADD-DIGIT" digit digits)
)
(digits ("ADD-DIGIT" digit digits)
()
)
(digit (|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|) (|8|) (|9|)
)
)
lola-1.6/test/intr-leftfactor 0000664 0000000 0000000 00000001057 14141267051 0016320 0 ustar 00root root 0000000 0000000 ;
; this grammar recognises integer
; expressions involving +,-,*,/ and unary -
;
(
(lines (expr "PRINT" \n lines)
(\n lines)
()
)
(expr (term + term "ADD")
(term - term "SUBTRACT")
(term)
)
(term (fact * fact "MULTIPLY" termp)
(fact / fact "DIVIDE" termp)
(fact)
)
(fact (|(| expr |)|)
(int "PUSH")
(- fact "NEGATE")
(+ fact)
)
(int ("CLEAR" digits)
)
(digits ("ADD-DIGIT" digit more-digits)
)
(more-digits ("ADD-DIGIT" digit more-digits)
()
)
(digit (|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|) (|8|) (|9|)
)
)
lola-1.6/test/iparser 0000775 0000000 0000000 00000010346 14141267051 0014666 0 ustar 00root root 0000000 0000000 #!/usr/local/calypso
;
; parser - test a parse table
;
;
; data abstraction
;
; a non terminal is a symbol bound to a list of lists
; a terminal is a symbol not bound to a list
; an action is a string
;
(defun non-terminalp (item)
(and (symbolp item)
(boundp item)
(listp (eval item))
)
)
(defun terminalp (item)
(or (null item)
(and (symbolp item)
(not (non-terminalp item))
)
)
)
(defun actionp (item)
(stringp item)
)
(defun null-production (p)
(if (null p)
t
elseif (stringp (car p))
(null-production (cdr p))
else
nil
)
)
(defun start-symbolp (item) (equal item start-symbol))
(defun parser (parse-table start-symbol end-token)
(let ((stack (list start-symbol end-token))
(input-token (lex))
(table-entry)
(tos)
)
(while stack
(patom "stack is ")
(print stack)
(setq tos (car stack)) (setq stack (cdr stack))
(if (non-terminalp tos)
(setq table-entry (dictionary-lookup parse-table
(list input-token tos))
)
(if (null table-entry)
(error (strcat "parser: error on " (sprint input-token)))
)
(patom " pushing production ") (print (cadr table-entry)) (terpr)
(cond ((cadr table-entry)
(setq stack (conc (cadr table-entry) stack))
)
)
elseif (actionp tos)
(patom "token is ") (print input-token)
(patom " performing action ") (print tos) (terpr)
(action tos input-token)
elseif (terminalp tos)
(if (= tos input-token)
(patom " matching token ") (print tos) (terpr)
(if (not (= tos end-token))
(setq input-token (lex))
)
else
(error (strcat "parser error on " (sprint input-token)))
)
)
)
)
)
(defun lex ()
(let ((char (getchar)))
(cond ((or (= char ~ )
(= char ~\t )
)
(lex)
)
((or (= char nil)
(= char -1)
)
(symbol "$" parse-dictionary)
)
(t
(symbol (scons char nil) parse-dictionary)
)
)
)
)
(setq value-stack nil)
(defun pop-stack ()
(let ((t (car value-stack)))
(setq value-stack (cdr value-stack))
t)
)
(defun push-stack (t)
(setq value-stack (cons t value-stack))
t
)
(setq value-temp 0)
(defun action (name value)
(let ((t1) (t2))
(cond ((= "ADD" name)
(push-stack (+ (pop-stack) (pop-stack)))
)
((= "SUBTRACT" name)
(setq t1 (pop-stack))
(setq t2 (pop-stack))
(push-stack (- t2 t1))
)
((= "MULTIPLY" name)
(push-stack (* (pop-stack) (pop-stack)))
)
((= "DIVIDE" name)
(setq t1 (pop-stack))
(setq t2 (pop-stack))
(push-stack (/ t2 t1))
)
((= "PUSH" name)
(push-stack value-temp)
)
((= "NEGATE" name)
(push-stack (- 0 (pop-stack)))
)
((= "CLEAR" name)
(setq value-temp 0)
)
((= "ADD-DIGIT" name)
(setq value-temp (+ (* value-temp 10)
(- (scar (get-name value)) ~0)
)
)
)
((= "PRINT" name)
(print (pop-stack)) (terpr)
)
)
)
)
(defun init ()
(setq parse-table (new-dictionary))
(setq parse-dictionary (new-dictionary))
(setq end-token (symbol "$" parse-dictionary))
)
(defun cadaar (l) (car (cdr (car (car l)))))
(defun bind-to-lists (atoms)
(cond (atoms (set (car atoms) '(foo)) (bind-to-lists (cdr atoms)))
(t nil)
)
)
(defun put-lists-into-parse-table (lists parse-table)
(cond (lists
(dictionary-insert parse-table (caar lists) (car lists))
(put-lists-into-parse-table (cdr lists) parse-table)
)
(t nil)
)
)
(defun process-file (file-in)
(init)
(setq terminals (fread-dictionary file-in parse-dictionary))
(setq non-terminals (fread-dictionary file-in parse-dictionary))
(bind-to-lists non-terminals)
(setq table (fread-dictionary file-in parse-dictionary))
(setq start-symbol (cadaar table))
(put-lists-into-parse-table table parse-table)
(parser parse-table (cadaar table) end-token)
)
(defun main-parser ()
(setq file-in stdin)
(if argv
(setq file-in (fopen (car argv) 'r))
(if (null file-in)
(error (strcat "parser: can't open " (sprint (car argv))))
)
)
(process-file file-in)
(fclose file-in)
)
(main-parser)
lola-1.6/test/lcalc 0000775 0000000 0000000 00000000064 14141267051 0014273 0 ustar 00root root 0000000 0000000 #!/home/keithp/bin/kalypso
(include 'calc.l)
(calc)
lola-1.6/test/leftgrammar 0000664 0000000 0000000 00000000256 14141267051 0015516 0 ustar 00root root 0000000 0000000 ;
; this is an ambiguous grammar and must
; be run through flo before lola to factor
; out the common left sub-expressions
;
((foo (a b c)
(a b d)
(e f g)
(e f h i)
)
)
lola-1.6/test/lisp.profile 0000664 0000000 0000000 00000000000 14141267051 0015606 0 ustar 00root root 0000000 0000000 lola-1.6/test/nf.g 0000664 0000000 0000000 00000000273 14141267051 0014044 0 ustar 00root root 0000000 0000000 (|(| |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| |)| $ - + / * E e .)
(expr exprp term termp fact float opt-sign opt-digits digits more-digits digit opt-exp exp eE opt-. floatp digitsp)
(
((( lola-1.6/test/nfg 0000664 0000000 0000000 00000013035 14141267051 0013766 0 ustar 00root root 0000000 0000000 (|(| |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| |)| $ - + / * E e .)
(expr exprp term termp fact float opt-sign opt-digits digits more-digits digit opt-exp exp eE opt-. floatp digitsp)
(
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((. expr) (term exprp))
((+ expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
(($ exprp) ())
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((. term) (fact termp))
((+ term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
(($ termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (float "PUSH"))
((|8| fact) (float "PUSH"))
((|7| fact) (float "PUSH"))
((|6| fact) (float "PUSH"))
((|5| fact) (float "PUSH"))
((|4| fact) (float "PUSH"))
((|3| fact) (float "PUSH"))
((|2| fact) (float "PUSH"))
((|1| fact) (float "PUSH"))
((|0| fact) (float "PUSH"))
((. fact) (float "PUSH"))
((- fact) (float "PUSH"))
((+ fact) (float "PUSH"))
((- fact) (- fact "NEGATE"))
((|9| float) (opt-sign floatp))
((|8| float) (opt-sign floatp))
((|7| float) (opt-sign floatp))
((|6| float) (opt-sign floatp))
((|5| float) (opt-sign floatp))
((|4| float) (opt-sign floatp))
((|3| float) (opt-sign floatp))
((|2| float) (opt-sign floatp))
((|1| float) (opt-sign floatp))
((|0| float) (opt-sign floatp))
((. float) (opt-sign floatp))
((- float) (opt-sign floatp))
((+ float) (opt-sign floatp))
((+ opt-sign) ("POSITIVE" +))
((- opt-sign) ("NEGATIVE" -))
((|9| opt-sign) ())
((|8| opt-sign) ())
((|7| opt-sign) ())
((|6| opt-sign) ())
((|5| opt-sign) ())
((|4| opt-sign) ())
((|3| opt-sign) ())
((|2| opt-sign) ())
((|1| opt-sign) ())
((|0| opt-sign) ())
((. opt-sign) ())
((|9| opt-digits) (digits))
((|8| opt-digits) (digits))
((|7| opt-digits) (digits))
((|6| opt-digits) (digits))
((|5| opt-digits) (digits))
((|4| opt-digits) (digits))
((|3| opt-digits) (digits))
((|2| opt-digits) (digits))
((|1| opt-digits) (digits))
((|0| opt-digits) (digits))
((|)| opt-digits) ())
(($ opt-digits) ())
((- opt-digits) ())
((+ opt-digits) ())
((/ opt-digits) ())
((* opt-digits) ())
((E opt-digits) ())
((e opt-digits) ())
((|9| digits) ("ADD-DIGIT" digit digitsp))
((|8| digits) ("ADD-DIGIT" digit digitsp))
((|7| digits) ("ADD-DIGIT" digit digitsp))
((|6| digits) ("ADD-DIGIT" digit digitsp))
((|5| digits) ("ADD-DIGIT" digit digitsp))
((|4| digits) ("ADD-DIGIT" digit digitsp))
((|3| digits) ("ADD-DIGIT" digit digitsp))
((|2| digits) ("ADD-DIGIT" digit digitsp))
((|1| digits) ("ADD-DIGIT" digit digitsp))
((|0| digits) ("ADD-DIGIT" digit digitsp))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
(($ more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((E more-digits) ())
((e more-digits) ())
((. more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
((E opt-exp) ("EXP" exp))
((e opt-exp) ("EXP" exp))
((|)| opt-exp) ())
(($ opt-exp) ())
((- opt-exp) ())
((+ opt-exp) ())
((/ opt-exp) ())
((* opt-exp) ())
((E exp) (eE opt-sign "CLEAR" digits))
((e exp) (eE opt-sign "CLEAR" digits))
((e eE) (e))
((E eE) (E))
((. opt-.) (. "POINT" opt-digits))
((|)| opt-.) ())
(($ opt-.) ())
((- opt-.) ())
((+ opt-.) ())
((/ opt-.) ())
((* opt-.) ())
((E opt-.) ())
((e opt-.) ())
((. floatp) (. "CLEAR" "POINT" digits opt-exp))
((|9| floatp) ("CLEAR" digits opt-. opt-exp))
((|8| floatp) ("CLEAR" digits opt-. opt-exp))
((|7| floatp) ("CLEAR" digits opt-. opt-exp))
((|6| floatp) ("CLEAR" digits opt-. opt-exp))
((|5| floatp) ("CLEAR" digits opt-. opt-exp))
((|4| floatp) ("CLEAR" digits opt-. opt-exp))
((|3| floatp) ("CLEAR" digits opt-. opt-exp))
((|2| floatp) ("CLEAR" digits opt-. opt-exp))
((|1| floatp) ("CLEAR" digits opt-. opt-exp))
((|0| floatp) ("CLEAR" digits opt-. opt-exp))
((|)| digitsp) (more-digits))
(($ digitsp) (more-digits))
((- digitsp) (more-digits))
((+ digitsp) (more-digits))
((/ digitsp) (more-digits))
((* digitsp) (more-digits))
((E digitsp) (more-digits))
((e digitsp) (more-digits))
((. digitsp) (more-digits))
((|9| digitsp) (more-digits))
((|8| digitsp) (more-digits))
((|7| digitsp) (more-digits))
((|6| digitsp) (more-digits))
((|5| digitsp) (more-digits))
((|4| digitsp) (more-digits))
((|3| digitsp) (more-digits))
((|2| digitsp) (more-digits))
((|1| digitsp) (more-digits))
((|0| digitsp) (more-digits))
((|)| digitsp) ())
(($ digitsp) ())
((- digitsp) ())
((+ digitsp) ())
((/ digitsp) ())
((* digitsp) ())
((E digitsp) ())
((e digitsp) ())
((. digitsp) ())
)
lola-1.6/test/nint.g 0000664 0000000 0000000 00000007751 14141267051 0014421 0 ustar 00root root 0000000 0000000 ($ |(| |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| |)| |\n| - + / *)
(lines expr exprp term termp fact int digits more-digits digit digitsp)
(
((+ lines) (expr "PRINT" |\n| lines))
((- lines) (expr "PRINT" |\n| lines))
((|9| lines) (expr "PRINT" |\n| lines))
((|8| lines) (expr "PRINT" |\n| lines))
((|7| lines) (expr "PRINT" |\n| lines))
((|6| lines) (expr "PRINT" |\n| lines))
((|5| lines) (expr "PRINT" |\n| lines))
((|4| lines) (expr "PRINT" |\n| lines))
((|3| lines) (expr "PRINT" |\n| lines))
((|2| lines) (expr "PRINT" |\n| lines))
((|1| lines) (expr "PRINT" |\n| lines))
((|0| lines) (expr "PRINT" |\n| lines))
((|(| lines) (expr "PRINT" |\n| lines))
(($ lines) ())
((+ expr) (term exprp))
((- expr) (term exprp))
((|9| expr) (term exprp))
((|8| expr) (term exprp))
((|7| expr) (term exprp))
((|6| expr) (term exprp))
((|5| expr) (term exprp))
((|4| expr) (term exprp))
((|3| expr) (term exprp))
((|2| expr) (term exprp))
((|1| expr) (term exprp))
((|0| expr) (term exprp))
((|(| expr) (term exprp))
((+ exprp) (+ term "ADD" exprp))
((- exprp) (- term "SUBTRACT" exprp))
((|)| exprp) ())
((|\n| exprp) ())
((+ term) (fact termp))
((- term) (fact termp))
((|9| term) (fact termp))
((|8| term) (fact termp))
((|7| term) (fact termp))
((|6| term) (fact termp))
((|5| term) (fact termp))
((|4| term) (fact termp))
((|3| term) (fact termp))
((|2| term) (fact termp))
((|1| term) (fact termp))
((|0| term) (fact termp))
((|(| term) (fact termp))
((* termp) (* fact "MULTIPLY" termp))
((/ termp) (/ fact "DIVIDE" termp))
((|)| termp) ())
((|\n| termp) ())
((- termp) ())
((+ termp) ())
((|(| fact) (|(| expr |)|))
((|9| fact) (int "PUSH"))
((|8| fact) (int "PUSH"))
((|7| fact) (int "PUSH"))
((|6| fact) (int "PUSH"))
((|5| fact) (int "PUSH"))
((|4| fact) (int "PUSH"))
((|3| fact) (int "PUSH"))
((|2| fact) (int "PUSH"))
((|1| fact) (int "PUSH"))
((|0| fact) (int "PUSH"))
((- fact) (- fact "NEGATE"))
((+ fact) (+ fact))
((|9| int) ("CLEAR" digits))
((|8| int) ("CLEAR" digits))
((|7| int) ("CLEAR" digits))
((|6| int) ("CLEAR" digits))
((|5| int) ("CLEAR" digits))
((|4| int) ("CLEAR" digits))
((|3| int) ("CLEAR" digits))
((|2| int) ("CLEAR" digits))
((|1| int) ("CLEAR" digits))
((|0| int) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit digitsp))
((|8| digits) ("ADD-DIGIT" digit digitsp))
((|7| digits) ("ADD-DIGIT" digit digitsp))
((|6| digits) ("ADD-DIGIT" digit digitsp))
((|5| digits) ("ADD-DIGIT" digit digitsp))
((|4| digits) ("ADD-DIGIT" digit digitsp))
((|3| digits) ("ADD-DIGIT" digit digitsp))
((|2| digits) ("ADD-DIGIT" digit digitsp))
((|1| digits) ("ADD-DIGIT" digit digitsp))
((|0| digits) ("ADD-DIGIT" digit digitsp))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
((|0| more-digits) ("ADD-DIGIT" digit more-digits))
((|)| more-digits) ())
((|\n| more-digits) ())
((- more-digits) ())
((+ more-digits) ())
((/ more-digits) ())
((* more-digits) ())
((|0| digit) (|0|))
((|1| digit) (|1|))
((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
((|)| digitsp) (more-digits))
((|\n| digitsp) (more-digits))
((- digitsp) (more-digits))
((+ digitsp) (more-digits))
((/ digitsp) (more-digits))
((* digitsp) (more-digits))
((|9| digitsp) (more-digits))
((|8| digitsp) (more-digits))
((|7| digitsp) (more-digits))
((|6| digitsp) (more-digits))
((|5| digitsp) (more-digits))
((|4| digitsp) (more-digits))
((|3| digitsp) (more-digits))
((|2| digitsp) (more-digits))
((|1| digitsp) (more-digits))
((|0| digitsp) (more-digits))
((|)| digitsp) ())
((|\n| digitsp) ())
((- digitsp) ())
((+ digitsp) ())
((/ digitsp) ())
((* digitsp) ())
)
lola-1.6/test/paren 0000664 0000000 0000000 00000000125 14141267051 0014315 0 ustar 00root root 0000000 0000000 ((S (|(| Sp) () )
(Sp (|)| S) (|(| Sp) )
)
lola-1.6/test/parser,v 0000775 0000000 0000000 00000006345 14141267051 0014763 0 ustar 00root root 0000000 0000000 head 1.1;
access;
symbols;
locks
keithp:1.1; strict;
comment @# @;
1.1
date 94.12.13.17.49.30; author keithp; state Exp;
branches;
next ;
desc
@@
1.1
log
@Initial revision
@
text
@#!/usr/local/klisp
;
; parser - test a parse table
;
;
; data abstraction
;
; a non terminal is a symbol bound to a list of lists
; a terminal is a symbol not bound to a list
; an action is a string
;
(defun non-terminalp (item)
(and (symbolp item)
(boundp item)
(listp (eval item))
)
)
(defun terminalp (item)
(or (null item)
(and (symbolp item)
(not (non-terminalp item))
)
)
)
(defun actionp (item)
(stringp item)
)
(defun null-production (p)
(if (null p)
t
elseif (stringp (car p))
(null-production (cdr p))
else
nil
)
)
(defun start-symbolp (item) (equal item start-symbol))
(defun parser (parse-table start-symbol end-token)
(patom "starting\n")
(let ((stack (list start-symbol end-token))
(input-token (lex))
(table-entry)
(tos)
)
(while stack
; (patom "stack is ")
; (print stack)
(setq tos (car stack)) (setq stack (cdr stack))
(if (non-terminalp tos)
(setq table-entry (dictionary-lookup parse-table
(list input-token tos))
)
(if (null table-entry)
(error (strcat "parser: error on " (sprint input-token)))
)
; (patom " pushing production ") (print (cadr table-entry)) (terpr)
(cond ((cadr table-entry)
(setq stack (conc (cadr table-entry) stack))
)
)
elseif (actionp tos)
(patom "token is ") (print input-token)
(patom " performing action ") (print tos) (terpr)
elseif (terminalp tos)
(if (= tos input-token)
(patom " matching token ") (print tos) (terpr)
(if (not (= tos end-token))
(setq input-token (lex))
)
else
(error (strcat "parser error on " (sprint input-token)))
)
)
)
)
)
(defun lex ()
(let ((char (getchar)))
(symbol (scons char nil) parse-dictionary)
)
)
(defun init ()
(setq parse-dictionary (new-dictionary))
(setq parse-table (new-dictionary))
(setq end-token (symbol "$" parse-dictionary))
)
(defun cadaar (l) (car (cdr (car (car l)))))
(defun bind-to-lists (atoms)
(cond (atoms (set (car atoms) '(foo)) (bind-to-lists (cdr atoms)))
(t nil)
)
)
(defun put-lists-into-parse-table (lists parse-table)
(cond (lists
(dictionary-insert parse-table (caar lists) (car lists))
(put-lists-into-parse-table (cdr lists) parse-table)
)
(t nil)
)
)
(defun process-file (file-in)
(init)
(setq terminals (fread-dictionary file-in parse-dictionary))
(setq non-terminals (fread-dictionary file-in parse-dictionary))
(bind-to-lists non-terminals)
(setq table (fread-dictionary file-in parse-dictionary))
(setq start-symbol (cadaar table))
(put-lists-into-parse-table table parse-table)
(parser parse-table (cadaar table) end-token)
)
(defun main-parser ()
(setq file-in stdin)
(if argv
(setq file-in (fopen (car argv) 'r))
(if (null file-in)
(error (strcat "parser: can't open " (sprint (car argv))))
)
)
(process-file file-in)
(fclose file-in)
)
(main-parser)
@
lola-1.6/test/pparen 0000664 0000000 0000000 00000000144 14141267051 0014476 0 ustar 00root root 0000000 0000000 ((S (Op Sp) () )
(Sp (Cp E) (Op Sp) () )
(E (Op Ep) () )
(Ep (Cp E) (Op Ep) )
)
lola-1.6/test/pparen.y 0000664 0000000 0000000 00000000175 14141267051 0014751 0 ustar 00root root 0000000 0000000 %token OP CP
%%
sentence : matched_parens
| OP sentence
;
matched_parens : OP matched_parens CP matched_parens
;
lola-1.6/test/prof 0000664 0000000 0000000 00000002703 14141267051 0014162 0 ustar 00root root 0000000 0000000 ;
; this grammer recognises klisp profile output
;
(
(profile-file (opt-whites opt-header opt-profiles)
)
(opt-header (name name name)
()
)
(opt-whites (whites)
()
)
(opt-profiles (profile opt-profiles)
()
)
(profile (number profile-p)
)
(profile-p (callee)
(caller)
)
(callee (number class name)
)
(caller (name)
)
;
; the rest of the grammar is actually the lexer
;
(class (|U| whites)
(|B| whites)
)
(number ("CLEAR" digits "PUSH" whites)
)
(name ("START-NAME" letters "END-NAME" whites)
)
(digits ("ADD-DIGIT" digit more-digits)
)
(more-digits ("ADD-DIGIT" digit more-digits)
()
)
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lola-1.6/test/prof.g 0000664 0000000 0000000 00000104226 14141267051 0014412 0 ustar 00root root 0000000 0000000 ($ |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| | | |\n| ! |"| |#| % & |'| |(| |)| * + , - . / : |;| < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |[| |\\| |]| ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z |{| |\|| |}| |~| \177)
(profile-file opt-header opt-whites opt-profiles profile profile-p callee caller class number name digits more-digits digit letters more-letters whites more-whites white letter)
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((k letter) (k))
((l letter) (l))
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((n letter) (n))
((o letter) (o))
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((u letter) (u))
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((w letter) (w))
((x letter) (x))
((y letter) (y))
((z letter) (z))
((|{| letter) (|{|))
((|\|| letter) (|\||))
((|}| letter) (|}|))
((|~| letter) (|~|))
((\177 letter) (\177))
)
lola-1.6/test/prof.h 0000664 0000000 0000000 00000064006 14141267051 0014414 0 ustar 00root root 0000000 0000000 (\177 |~| |}| |\|| |{| z y x w v u t s r q p o n m l k j i h g f e d c b a ` _ ^ |]| |\\| |[| Z Y X W V U T S R Q P O N M L K J I H G F E D C B A @ ? > = < |;| : / . - , + * |)| |(| |'| & % $ |#| |"| ! |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| |\n| | |)
(profile-file opt-profiles profiles profile callee callers caller class number digits more-digits digit name name-end opt-white whites white printable letter opt-header profilesp digitsp)
(
((\177 profile-file) (opt-header opt-white opt-profiles))
((|~| profile-file) (opt-header opt-white opt-profiles))
((|}| profile-file) (opt-header opt-white opt-profiles))
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((|{| profile-file) (opt-header opt-white opt-profiles))
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((q profile-file) (opt-header opt-white opt-profiles))
((p profile-file) (opt-header opt-white opt-profiles))
((o profile-file) (opt-header opt-white opt-profiles))
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((l profile-file) (opt-header opt-white opt-profiles))
((k profile-file) (opt-header opt-white opt-profiles))
((j profile-file) (opt-header opt-white opt-profiles))
((i profile-file) (opt-header opt-white opt-profiles))
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((d profile-file) (opt-header opt-white opt-profiles))
((c profile-file) (opt-header opt-white opt-profiles))
((b profile-file) (opt-header opt-white opt-profiles))
((a profile-file) (opt-header opt-white opt-profiles))
((` profile-file) (opt-header opt-white opt-profiles))
((_ profile-file) (opt-header opt-white opt-profiles))
((^ profile-file) (opt-header opt-white opt-profiles))
((|]| profile-file) (opt-header opt-white opt-profiles))
((|\\| profile-file) (opt-header opt-white opt-profiles))
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((X profile-file) (opt-header opt-white opt-profiles))
((W profile-file) (opt-header opt-white opt-profiles))
((V profile-file) (opt-header opt-white opt-profiles))
((U profile-file) (opt-header opt-white opt-profiles))
((T profile-file) (opt-header opt-white opt-profiles))
((S profile-file) (opt-header opt-white opt-profiles))
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((F profile-file) (opt-header opt-white opt-profiles))
((E profile-file) (opt-header opt-white opt-profiles))
((D profile-file) (opt-header opt-white opt-profiles))
((C profile-file) (opt-header opt-white opt-profiles))
((B profile-file) (opt-header opt-white opt-profiles))
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((? profile-file) (opt-header opt-white opt-profiles))
((> profile-file) (opt-header opt-white opt-profiles))
((= profile-file) (opt-header opt-white opt-profiles))
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((/ profile-file) (opt-header opt-white opt-profiles))
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((! profile-file) (opt-header opt-white opt-profiles))
((|\n| profile-file) (opt-header opt-white opt-profiles))
((| | profile-file) (opt-header opt-white opt-profiles))
((|9| opt-profiles) (profiles))
((|8| opt-profiles) (profiles))
((|7| opt-profiles) (profiles))
((|6| opt-profiles) (profiles))
((|5| opt-profiles) (profiles))
((|4| opt-profiles) (profiles))
((|3| opt-profiles) (profiles))
((|2| opt-profiles) (profiles))
((|1| opt-profiles) (profiles))
((|0| opt-profiles) (profiles))
((|\n| opt-profiles) (profiles))
((| | opt-profiles) (profiles))
(($ opt-profiles) ())
((|9| profiles) (profile profilesp))
((|8| profiles) (profile profilesp))
((|7| profiles) (profile profilesp))
((|6| profiles) (profile profilesp))
((|5| profiles) (profile profilesp))
((|4| profiles) (profile profilesp))
((|3| profiles) (profile profilesp))
((|2| profiles) (profile profilesp))
((|1| profiles) (profile profilesp))
((|0| profiles) (profile profilesp))
((|\n| profiles) (profile profilesp))
((| | profiles) (profile profilesp))
((|9| profile) (callee callers))
((|8| profile) (callee callers))
((|7| profile) (callee callers))
((|6| profile) (callee callers))
((|5| profile) (callee callers))
((|4| profile) (callee callers))
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((|2| profile) (callee callers))
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((|9| callee) (opt-white number whites number whites class whites name))
((|8| callee) (opt-white number whites number whites class whites name))
((|7| callee) (opt-white number whites number whites class whites name))
((|6| callee) (opt-white number whites number whites class whites name))
((|5| callee) (opt-white number whites number whites class whites name))
((|4| callee) (opt-white number whites number whites class whites name))
((|3| callee) (opt-white number whites number whites class whites name))
((|2| callee) (opt-white number whites number whites class whites name))
((|1| callee) (opt-white number whites number whites class whites name))
((|0| callee) (opt-white number whites number whites class whites name))
((|\n| callee) (opt-white number whites number whites class whites name))
((| | callee) (opt-white number whites number whites class whites name))
((|\n| callers) (whites caller callers))
((| | callers) (whites caller callers))
(($ callers) ())
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((|9| caller) (number whites name))
((|8| caller) (number whites name))
((|7| caller) (number whites name))
((|6| caller) (number whites name))
((|5| caller) (number whites name))
((|4| caller) (number whites name))
((|3| caller) (number whites name))
((|2| caller) (number whites name))
((|1| caller) (number whites name))
((|0| caller) (number whites name))
((U class) (U))
((B class) (B))
((|9| number) ("CLEAR" digits))
((|8| number) ("CLEAR" digits))
((|7| number) ("CLEAR" digits))
((|6| number) ("CLEAR" digits))
((|5| number) ("CLEAR" digits))
((|4| number) ("CLEAR" digits))
((|3| number) ("CLEAR" digits))
((|2| number) ("CLEAR" digits))
((|1| number) ("CLEAR" digits))
((|0| number) ("CLEAR" digits))
((|9| digits) ("ADD-DIGIT" digit digitsp))
((|8| digits) ("ADD-DIGIT" digit digitsp))
((|7| digits) ("ADD-DIGIT" digit digitsp))
((|6| digits) ("ADD-DIGIT" digit digitsp))
((|5| digits) ("ADD-DIGIT" digit digitsp))
((|4| digits) ("ADD-DIGIT" digit digitsp))
((|3| digits) ("ADD-DIGIT" digit digitsp))
((|2| digits) ("ADD-DIGIT" digit digitsp))
((|1| digits) ("ADD-DIGIT" digit digitsp))
((|0| digits) ("ADD-DIGIT" digit digitsp))
((|9| more-digits) ("ADD-DIGIT" digit more-digits))
((|8| more-digits) ("ADD-DIGIT" digit more-digits))
((|7| more-digits) ("ADD-DIGIT" digit more-digits))
((|6| more-digits) ("ADD-DIGIT" digit more-digits))
((|5| more-digits) ("ADD-DIGIT" digit more-digits))
((|4| more-digits) ("ADD-DIGIT" digit more-digits))
((|3| more-digits) ("ADD-DIGIT" digit more-digits))
((|2| more-digits) ("ADD-DIGIT" digit more-digits))
((|1| more-digits) ("ADD-DIGIT" digit more-digits))
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((|\n| more-digits) ())
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((|2| digit) (|2|))
((|3| digit) (|3|))
((|4| digit) (|4|))
((|5| digit) (|5|))
((|6| digit) (|6|))
((|7| digit) (|7|))
((|8| digit) (|8|))
((|9| digit) (|9|))
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((|\n| opt-white) (white opt-white))
((| | opt-white) (white opt-white))
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((_ opt-white) ())
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((|\n| opt-white) ())
((| | opt-white) ())
((|\n| whites) (white opt-white))
((| | whites) (white opt-white))
((| | white) (| |))
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((! printable) (!))
((|"| printable) (|"|))
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((N printable) (N))
((O printable) (O))
((P printable) (P))
((Q printable) (Q))
((R printable) (R))
((S printable) (S))
((T printable) (T))
((U printable) (U))
((V printable) (V))
((W printable) (W))
((X printable) (X))
((Y printable) (Y))
((Z printable) (Z))
((|[| printable) (|[|))
((|\\| printable) (|\\|))
((|]| printable) (|]|))
((^ printable) (^))
((_ printable) (_))
((` printable) (`))
((a printable) (a))
((b printable) (b))
((c printable) (c))
((d printable) (d))
((e printable) (e))
((f printable) (f))
((g printable) (g))
((h printable) (h))
((i printable) (i))
((j printable) (j))
((k printable) (k))
((l printable) (l))
((m printable) (m))
((n printable) (n))
((o printable) (o))
((p printable) (p))
((q printable) (q))
((r printable) (r))
((s printable) (s))
((t printable) (t))
((u printable) (u))
((v printable) (v))
((w printable) (w))
((x printable) (x))
((y printable) (y))
((z printable) (z))
((|{| printable) (|{|))
((|\|| printable) (|\||))
((|}| printable) (|}|))
((|~| printable) (|~|))
((\177 printable) (\177))
((! letter) (!))
((|"| letter) (|"|))
((|#| letter) (|#|))
(($ letter) ($))
((% letter) (%))
((& letter) (&))
((|'| letter) (|'|))
((|(| letter) (|(|))
((|)| letter) (|)|))
((* letter) (*))
((+ letter) (+))
((, letter) (,))
((- letter) (-))
((. letter) (.))
((/ letter) (/))
((: letter) (:))
((|;| letter) (|;|))
((< letter) (<))
((= letter) (=))
((> letter) (>))
((? letter) (?))
((@ letter) (@))
((A letter) (A))
((B letter) (B))
((C letter) (C))
((D letter) (D))
((E letter) (E))
((F letter) (F))
((G letter) (G))
((H letter) (H))
((I letter) (I))
((J letter) (J))
((K letter) (K))
((L letter) (L))
((M letter) (M))
((N letter) (N))
((O letter) (O))
((P letter) (P))
((Q letter) (Q))
((R letter) (R))
((S letter) (S))
((T letter) (T))
((U letter) (U))
((V letter) (V))
((W letter) (W))
((X letter) (X))
((Y letter) (Y))
((Z letter) (Z))
((|[| letter) (|[|))
((|\\| letter) (|\\|))
((|]| letter) (|]|))
((^ letter) (^))
((_ letter) (_))
((` letter) (`))
((a letter) (a))
((b letter) (b))
((c letter) (c))
((d letter) (d))
((e letter) (e))
((f letter) (f))
((g letter) (g))
((h letter) (h))
((i letter) (i))
((j letter) (j))
((k letter) (k))
((l letter) (l))
((m letter) (m))
((n letter) (n))
((o letter) (o))
((p letter) (p))
((q letter) (q))
((r letter) (r))
((s letter) (s))
((t letter) (t))
((u letter) (u))
((v letter) (v))
((w letter) (w))
((x letter) (x))
((y letter) (y))
((z letter) (z))
((|{| letter) (|{|))
((|\|| letter) (|\||))
((|}| letter) (|}|))
((|~| letter) (|~|))
((\177 letter) (\177))
((\177 opt-header) (opt-white name whites name whites name))
((|~| opt-header) (opt-white name whites name whites name))
((|}| opt-header) (opt-white name whites name whites name))
((|\|| opt-header) (opt-white name whites name whites name))
((|{| opt-header) (opt-white name whites name whites name))
((z opt-header) (opt-white name whites name whites name))
((y opt-header) (opt-white name whites name whites name))
((x opt-header) (opt-white name whites name whites name))
((w opt-header) (opt-white name whites name whites name))
((v opt-header) (opt-white name whites name whites name))
((u opt-header) (opt-white name whites name whites name))
((t opt-header) (opt-white name whites name whites name))
((s opt-header) (opt-white name whites name whites name))
((r opt-header) (opt-white name whites name whites name))
((q opt-header) (opt-white name whites name whites name))
((p opt-header) (opt-white name whites name whites name))
((o opt-header) (opt-white name whites name whites name))
((n opt-header) (opt-white name whites name whites name))
((m opt-header) (opt-white name whites name whites name))
((l opt-header) (opt-white name whites name whites name))
((k opt-header) (opt-white name whites name whites name))
((j opt-header) (opt-white name whites name whites name))
((i opt-header) (opt-white name whites name whites name))
((h opt-header) (opt-white name whites name whites name))
((g opt-header) (opt-white name whites name whites name))
((f opt-header) (opt-white name whites name whites name))
((e opt-header) (opt-white name whites name whites name))
((d opt-header) (opt-white name whites name whites name))
((c opt-header) (opt-white name whites name whites name))
((b opt-header) (opt-white name whites name whites name))
((a opt-header) (opt-white name whites name whites name))
((` opt-header) (opt-white name whites name whites name))
((_ opt-header) (opt-white name whites name whites name))
((^ opt-header) (opt-white name whites name whites name))
((|]| opt-header) (opt-white name whites name whites name))
((|\\| opt-header) (opt-white name whites name whites name))
((|[| opt-header) (opt-white name whites name whites name))
((Z opt-header) (opt-white name whites name whites name))
((Y opt-header) (opt-white name whites name whites name))
((X opt-header) (opt-white name whites name whites name))
((W opt-header) (opt-white name whites name whites name))
((V opt-header) (opt-white name whites name whites name))
((U opt-header) (opt-white name whites name whites name))
((T opt-header) (opt-white name whites name whites name))
((S opt-header) (opt-white name whites name whites name))
((R opt-header) (opt-white name whites name whites name))
((Q opt-header) (opt-white name whites name whites name))
((P opt-header) (opt-white name whites name whites name))
((O opt-header) (opt-white name whites name whites name))
((N opt-header) (opt-white name whites name whites name))
((M opt-header) (opt-white name whites name whites name))
((L opt-header) (opt-white name whites name whites name))
((K opt-header) (opt-white name whites name whites name))
((J opt-header) (opt-white name whites name whites name))
((I opt-header) (opt-white name whites name whites name))
((H opt-header) (opt-white name whites name whites name))
((G opt-header) (opt-white name whites name whites name))
((F opt-header) (opt-white name whites name whites name))
((E opt-header) (opt-white name whites name whites name))
((D opt-header) (opt-white name whites name whites name))
((C opt-header) (opt-white name whites name whites name))
((B opt-header) (opt-white name whites name whites name))
((A opt-header) (opt-white name whites name whites name))
((@ opt-header) (opt-white name whites name whites name))
((? opt-header) (opt-white name whites name whites name))
((> opt-header) (opt-white name whites name whites name))
((= opt-header) (opt-white name whites name whites name))
((< opt-header) (opt-white name whites name whites name))
((|;| opt-header) (opt-white name whites name whites name))
((: opt-header) (opt-white name whites name whites name))
((/ opt-header) (opt-white name whites name whites name))
((. opt-header) (opt-white name whites name whites name))
((- opt-header) (opt-white name whites name whites name))
((, opt-header) (opt-white name whites name whites name))
((+ opt-header) (opt-white name whites name whites name))
((* opt-header) (opt-white name whites name whites name))
((|)| opt-header) (opt-white name whites name whites name))
((|(| opt-header) (opt-white name whites name whites name))
((|'| opt-header) (opt-white name whites name whites name))
((& opt-header) (opt-white name whites name whites name))
((% opt-header) (opt-white name whites name whites name))
(($ opt-header) (opt-white name whites name whites name))
((|#| opt-header) (opt-white name whites name whites name))
((|"| opt-header) (opt-white name whites name whites name))
((! opt-header) (opt-white name whites name whites name))
((|\n| opt-header) (opt-white name whites name whites name))
((| | opt-header) (opt-white name whites name whites name))
((|\n| profilesp) (whites profiles))
((| | profilesp) (whites profiles))
((|\n| digitsp) (more-digits))
((| | digitsp) (more-digits))
((|9| digitsp) (more-digits))
((|8| digitsp) (more-digits))
((|7| digitsp) (more-digits))
((|6| digitsp) (more-digits))
((|5| digitsp) (more-digits))
((|4| digitsp) (more-digits))
((|3| digitsp) (more-digits))
((|2| digitsp) (more-digits))
((|1| digitsp) (more-digits))
((|0| digitsp) (more-digits))
((|\n| digitsp) ())
((| | digitsp) ())
)
lola-1.6/test/prof.log 0000664 0000000 0000000 00000000000 14141267051 0014726 0 ustar 00root root 0000000 0000000 lola-1.6/test/resgram 0000775 0000000 0000000 00000004721 14141267051 0014661 0 ustar 00root root 0000000 0000000 #!/usr/local/klisp
;
; resgram
;
; create a resource file from an ll parser table
;
(defun cadaar (l) (car (cdr (car (car l)))))
(defun production-list (table)
(let ((rest))
(cond (table
(setq rest (production-list (cdr table)))
(cond ((member (cadar table) rest)
rest
)
(t (cons (cadar table) rest)
)
)
)
(t nil)
)
)
)
(defun enter-symbol (table value index)
(set (symbol index table) value)
)
(defun production-table (productions)
(let ((table (new-dictionary)) (map nil) (count 0) (p))
(while productions
(setq p (car productions))
(setq map (cons (list p count) map))
(while p
(enter-symbol table (car p) count)
(++ count)
(setq p (cdr p))
)
(enter-symbol table nil count)
(++ count)
(setq productions (cdr productions))
)
(list table map)
)
)
(defun dict-to-table (d count)
(let ((s))
(setq s (lookup count d))
(cond (s
(cons (eval s) (dict-to-table d (+ count 1)))
)
(t nil)
)
)
)
(defun print-parse-table (prod-table map table terminals non-terminals)
(let ((term) (index) (table-ent))
(while non-terminals
(setq term terminals)
(while term
(setq table-ent (assoc (list (car term) (car non-terminals))
table
)
)
(patom "/* ")
(print (car term))
(patom ", ")
(print (car non-terminals))
(patom " */ ")
(cond (table-ent
(setq index (cadr (assoc (cadr table-ent)
map
)
)
)
(patom index ",\n")
)
(t
(patom -1 ",\n")
)
)
(setq term (cdr term))
)
(setq non-terminals (cdr non-terminals))
)
)
)
(defun process-file (file-in)
(setq parse-dictionary (new-dictionary))
(setq terminals (fread-dictionary file-in parse-dictionary))
(setq non-terminals (fread-dictionary file-in parse-dictionary))
(setq table (fread-dictionary file-in parse-dictionary))
(setq list-of-productions (production-list table))
(setq start-symbol (cadaar table))
(setq temp (production-table list-of-productions))
(setq map (cadr temp))
(setq prod-table (dict-to-table (car temp) 0))
(print terminals)
(print non-terminals)
(print-parse-table prod-table map table terminals non-terminals)
(print prod-table)
)
(setq file-in stdin)
(if argv
(setq file-in (fopen (car argv) 'r))
(if (null file-in)
(error (strcat "parser: can't open " (sprint (car argv))))
)
)
(process-file file-in)
(fclose file-in)
lola-1.6/test/tekgram 0000664 0000000 0000000 00000004213 14141267051 0014644 0 ustar 00root root 0000000 0000000 ;
; 4012 grammar at the character level
;
(
(alpha ("PRINT" printable alpha)
(|\033| |\014| "CLEAR" alpha)
(|\r| "CR" alpha)
(|\n| "LF" alpha)
(|\t| "HT" alpha)
(|\b| "BS" alpha)
(|\013| "VT" alpha)
(graph alpha)
)
(graph (|\035| line graph)
(|\035| line exit-graph)
)
(exit-graph (|\037|)
(|\033| |\014| "CLEAR")
(|\r| "CR")
)
(line (move draws)
()
)
(move (coord "MOVE")
)
(draws (draw draws)
()
)
(draw (coord "DRAW")
)
(coord (HIADDR LOY HIADDR LOX "fourAddr")
(LOY HIADDR LOX "threeAddr")
(HIADDR LOX "twoAddr")
(LOY LOX "loLoAddr")
(LOX "oneAddr")
)
(HIADDR (|\40|) (|\41|) (|\42|) (|\43|)
(|\44|) (|\45|) (|\46|) (|\47|)
(|\50|) (|\51|) (|\52|) (|\53|)
(|\54|) (|\55|) (|\56|) (|\57|)
(|\60|) (|\61|) (|\62|) (|\63|)
(|\64|) (|\65|) (|\66|) (|\67|)
(|\70|) (|\71|) (|\72|) (|\73|)
(|\74|) (|\75|) (|\76|) (|\77|)
)
(LOY (|\140|) (|\141|) (|\142|) (|\143|)
(|\144|) (|\145|) (|\146|) (|\147|)
(|\150|) (|\151|) (|\152|) (|\153|)
(|\154|) (|\155|) (|\156|) (|\157|)
(|\160|) (|\161|) (|\162|) (|\163|)
(|\164|) (|\165|) (|\166|) (|\167|)
(|\170|) (|\171|) (|\172|) (|\173|)
(|\174|) (|\175|) (|\176|) (|\177|)
)
(LOX (|\100|) (|\101|) (|\102|) (|\103|)
(|\104|) (|\105|) (|\106|) (|\107|)
(|\110|) (|\111|) (|\112|) (|\113|)
(|\114|) (|\115|) (|\116|) (|\117|)
(|\120|) (|\121|) (|\122|) (|\123|)
(|\124|) (|\125|) (|\126|) (|\127|)
(|\130|) (|\131|) (|\132|) (|\133|)
(|\134|) (|\135|) (|\136|) (|\137|)
)
(printable
(| |) (|!|) (|"|) (|#|) (|$|) (|%|) (|&|) (|'|)
(|(|) (|)|) (|*|) (|+|) (|,|) (|-|) (|.|) (|/|)
(|0|) (|1|) (|2|) (|3|) (|4|) (|5|) (|6|) (|7|)
(|8|) (|9|) (|:|) (|;|) (|<|) (|=|) (|>|) (|?|)
(|@|) (|A|) (|B|) (|C|) (|D|) (|E|) (|F|) (|G|)
(|H|) (|I|) (|J|) (|K|) (|L|) (|M|) (|N|) (|O|)
(|P|) (|Q|) (|R|) (|S|) (|T|) (|U|) (|V|) (|W|)
(|X|) (|Y|) (|Z|) (|[|) (|\\|) (|]|) (|^|) (|_|)
(|`|) (|a|) (|b|) (|c|) (|d|) (|e|) (|f|) (|g|)
(|h|) (|i|) (|j|) (|k|) (|l|) (|m|) (|n|) (|o|)
(|p|) (|q|) (|r|) (|s|) (|t|) (|u|) (|v|) (|w|)
(|x|) (|y|) (|z|) (|{|) (|\||) (|}|) (|~|) (|\177|)
)
)
lola-1.6/test/tekgram.g 0000664 0000000 0000000 00000061466 14141267051 0015106 0 ustar 00root root 0000000 0000000 (|\013| \035 |\n| \033 \037 \177 |~| |}| |\|| |{| z y x w v u t s r q p o n m l k j i h g f e d c b a ` ? > = < |;| : |9| |8| |7| |6| |5| |4| |3| |2| |1| |0| / . - , + * |)| |(| |'| & % $ |#| |"| ! | | _ ^ |]| |\\| |[| Z Y X W V U T S R Q P O N M L K J I H G F E D C B A @)
(alpha graph exit-graph line move draws draw coord HIADDR LOY LOX printable graphp coordp coordpp)
(
((\177 alpha) (printable "PRINT" alpha))
((|~| alpha) (printable "PRINT" alpha))
((|}| alpha) (printable "PRINT" alpha))
((|\|| alpha) (printable "PRINT" alpha))
((|{| alpha) (printable "PRINT" alpha))
((z alpha) (printable "PRINT" alpha))
((y alpha) (printable "PRINT" alpha))
((x alpha) (printable "PRINT" alpha))
((w alpha) (printable "PRINT" alpha))
((v alpha) (printable "PRINT" alpha))
((u alpha) (printable "PRINT" alpha))
((t alpha) (printable "PRINT" alpha))
((s alpha) (printable "PRINT" alpha))
((r alpha) (printable "PRINT" alpha))
((q alpha) (printable "PRINT" alpha))
((p alpha) (printable "PRINT" alpha))
((o alpha) (printable "PRINT" alpha))
((n alpha) (printable "PRINT" alpha))
((m alpha) (printable "PRINT" alpha))
((l alpha) (printable "PRINT" alpha))
((k alpha) (printable "PRINT" alpha))
((j alpha) (printable "PRINT" alpha))
((i alpha) (printable "PRINT" alpha))
((h alpha) (printable "PRINT" alpha))
((g alpha) (printable "PRINT" alpha))
((f alpha) (printable "PRINT" alpha))
((e alpha) (printable "PRINT" alpha))
((d alpha) (printable "PRINT" alpha))
((c alpha) (printable "PRINT" alpha))
((b alpha) (printable "PRINT" alpha))
((a alpha) (printable "PRINT" alpha))
((` alpha) (printable "PRINT" alpha))
((_ alpha) (printable "PRINT" alpha))
((^ alpha) (printable "PRINT" alpha))
((|]| alpha) (printable "PRINT" alpha))
((|\\| alpha) (printable "PRINT" alpha))
((|[| alpha) (printable "PRINT" alpha))
((Z alpha) (printable "PRINT" alpha))
((Y alpha) (printable "PRINT" alpha))
((X alpha) (printable "PRINT" alpha))
((W alpha) (printable "PRINT" alpha))
((V alpha) (printable "PRINT" alpha))
((U alpha) (printable "PRINT" alpha))
((T alpha) (printable "PRINT" alpha))
((S alpha) (printable "PRINT" alpha))
((R alpha) (printable "PRINT" alpha))
((Q alpha) (printable "PRINT" alpha))
((P alpha) (printable "PRINT" alpha))
((O alpha) (printable "PRINT" alpha))
((N alpha) (printable "PRINT" alpha))
((M alpha) (printable "PRINT" alpha))
((L alpha) (printable "PRINT" alpha))
((K alpha) (printable "PRINT" alpha))
((J alpha) (printable "PRINT" alpha))
((I alpha) (printable "PRINT" alpha))
((H alpha) (printable "PRINT" alpha))
((G alpha) (printable "PRINT" alpha))
((F alpha) (printable "PRINT" alpha))
((E alpha) (printable "PRINT" alpha))
((D alpha) (printable "PRINT" alpha))
((C alpha) (printable "PRINT" alpha))
((B alpha) (printable "PRINT" alpha))
((A alpha) (printable "PRINT" alpha))
((@ alpha) (printable "PRINT" alpha))
((? alpha) (printable "PRINT" alpha))
((> alpha) (printable "PRINT" alpha))
((= alpha) (printable "PRINT" alpha))
((< alpha) (printable "PRINT" alpha))
((|;| alpha) (printable "PRINT" alpha))
((: alpha) (printable "PRINT" alpha))
((|9| alpha) (printable "PRINT" alpha))
((|8| alpha) (printable "PRINT" alpha))
((|7| alpha) (printable "PRINT" alpha))
((|6| alpha) (printable "PRINT" alpha))
((|5| alpha) (printable "PRINT" alpha))
((|4| alpha) (printable "PRINT" alpha))
((|3| alpha) (printable "PRINT" alpha))
((|2| alpha) (printable "PRINT" alpha))
((|1| alpha) (printable "PRINT" alpha))
((|0| alpha) (printable "PRINT" alpha))
((/ alpha) (printable "PRINT" alpha))
((. alpha) (printable "PRINT" alpha))
((- alpha) (printable "PRINT" alpha))
((, alpha) (printable "PRINT" alpha))
((+ alpha) (printable "PRINT" alpha))
((* alpha) (printable "PRINT" alpha))
((|)| alpha) (printable "PRINT" alpha))
((|(| alpha) (printable "PRINT" alpha))
((|'| alpha) (printable "PRINT" alpha))
((& alpha) (printable "PRINT" alpha))
((% alpha) (printable "PRINT" alpha))
(($ alpha) (printable "PRINT" alpha))
((|#| alpha) (printable "PRINT" alpha))
((|"| alpha) (printable "PRINT" alpha))
((! alpha) (printable "PRINT" alpha))
((| | alpha) (printable "PRINT" alpha))
((\033 alpha) (\033 |\n| "CLEAR" alpha))
((|\n| alpha) (|\n| "CR" alpha))
((|\n| alpha) (|\n| "LF" alpha))
((|\n| alpha) (|\n| "HT" alpha))
((|\n| alpha) (|\n| "BS" alpha))
((|\013| alpha) (|\013| "VT" alpha))
((\035 alpha) (graph alpha))
((\035 graph) (\035 line graphp))
((\037 exit-graph) (\037))
((\033 exit-graph) (\033 |\n| "CLEAR"))
((|\n| exit-graph) (|\n| "CR"))
((_ line) (move draws))
((^ line) (move draws))
((|]| line) (move draws))
((|\\| line) (move draws))
((|[| line) (move draws))
((Z line) (move draws))
((Y line) (move draws))
((X line) (move draws))
((W line) (move draws))
((V line) (move draws))
((U line) (move draws))
((T line) (move draws))
((S line) (move draws))
((R line) (move draws))
((Q line) (move draws))
((P line) (move draws))
((O line) (move draws))
((N line) (move draws))
((M line) (move draws))
((L line) (move draws))
((K line) (move draws))
((J line) (move draws))
((I line) (move draws))
((H line) (move draws))
((G line) (move draws))
((F line) (move draws))
((E line) (move draws))
((D line) (move draws))
((C line) (move draws))
((B line) (move draws))
((A line) (move draws))
((@ line) (move draws))
((? line) (move draws))
((> line) (move draws))
((= line) (move draws))
((< line) (move draws))
((|;| line) (move draws))
((: line) (move draws))
((|9| line) (move draws))
((|8| line) (move draws))
((|7| line) (move draws))
((|6| line) (move draws))
((|5| line) (move draws))
((|4| line) (move draws))
((|3| line) (move draws))
((|2| line) (move draws))
((|1| line) (move draws))
((|0| line) (move draws))
((/ line) (move draws))
((. line) (move draws))
((- line) (move draws))
((, line) (move draws))
((+ line) (move draws))
((* line) (move draws))
((|)| line) (move draws))
((|(| line) (move draws))
((|'| line) (move draws))
((& line) (move draws))
((% line) (move draws))
(($ line) (move draws))
((|#| line) (move draws))
((|"| line) (move draws))
((! line) (move draws))
((| | line) (move draws))
((\177 line) (move draws))
((|~| line) (move draws))
((|}| line) (move draws))
((|\|| line) (move draws))
((|{| line) (move draws))
((z line) (move draws))
((y line) (move draws))
((x line) (move draws))
((w line) (move draws))
((v line) (move draws))
((u line) (move draws))
((t line) (move draws))
((s line) (move draws))
((r line) (move draws))
((q line) (move draws))
((p line) (move draws))
((o line) (move draws))
((n line) (move draws))
((m line) (move draws))
((l line) (move draws))
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((|2| coordpp) (HIADDR LOX "threeAddr"))
((|1| coordpp) (HIADDR LOX "threeAddr"))
((|0| coordpp) (HIADDR LOX "threeAddr"))
((/ coordpp) (HIADDR LOX "threeAddr"))
((. coordpp) (HIADDR LOX "threeAddr"))
((- coordpp) (HIADDR LOX "threeAddr"))
((, coordpp) (HIADDR LOX "threeAddr"))
((+ coordpp) (HIADDR LOX "threeAddr"))
((* coordpp) (HIADDR LOX "threeAddr"))
((|)| coordpp) (HIADDR LOX "threeAddr"))
((|(| coordpp) (HIADDR LOX "threeAddr"))
((|'| coordpp) (HIADDR LOX "threeAddr"))
((& coordpp) (HIADDR LOX "threeAddr"))
((% coordpp) (HIADDR LOX "threeAddr"))
(($ coordpp) (HIADDR LOX "threeAddr"))
((|#| coordpp) (HIADDR LOX "threeAddr"))
((|"| coordpp) (HIADDR LOX "threeAddr"))
((! coordpp) (HIADDR LOX "threeAddr"))
((| | coordpp) (HIADDR LOX "threeAddr"))
((_ coordpp) (LOX "loLoAddr"))
((^ coordpp) (LOX "loLoAddr"))
((|]| coordpp) (LOX "loLoAddr"))
((|\\| coordpp) (LOX "loLoAddr"))
((|[| coordpp) (LOX "loLoAddr"))
((Z coordpp) (LOX "loLoAddr"))
((Y coordpp) (LOX "loLoAddr"))
((X coordpp) (LOX "loLoAddr"))
((W coordpp) (LOX "loLoAddr"))
((V coordpp) (LOX "loLoAddr"))
((U coordpp) (LOX "loLoAddr"))
((T coordpp) (LOX "loLoAddr"))
((S coordpp) (LOX "loLoAddr"))
((R coordpp) (LOX "loLoAddr"))
((Q coordpp) (LOX "loLoAddr"))
((P coordpp) (LOX "loLoAddr"))
((O coordpp) (LOX "loLoAddr"))
((N coordpp) (LOX "loLoAddr"))
((M coordpp) (LOX "loLoAddr"))
((L coordpp) (LOX "loLoAddr"))
((K coordpp) (LOX "loLoAddr"))
((J coordpp) (LOX "loLoAddr"))
((I coordpp) (LOX "loLoAddr"))
((H coordpp) (LOX "loLoAddr"))
((G coordpp) (LOX "loLoAddr"))
((F coordpp) (LOX "loLoAddr"))
((E coordpp) (LOX "loLoAddr"))
((D coordpp) (LOX "loLoAddr"))
((C coordpp) (LOX "loLoAddr"))
((B coordpp) (LOX "loLoAddr"))
((A coordpp) (LOX "loLoAddr"))
((@ coordpp) (LOX "loLoAddr"))
)