# Checking GLR Parsing. -*- Autotest -*-
# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
# 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, 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 Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
AT_BANNER([[C++ Type Syntax (GLR).]])
# _AT_TEST_GLR_CXXTYPES(DECL, RESOLVE1, RESOLVE2)
# -----------------------------------------------
# Store into types.y the calc program, with DECL inserted as a declaration,
# and with RESOLVE1 and RESOLVE2 as annotations on the conflicted rule for
# stmt. Then compile the result.
m4_define([_AT_TEST_GLR_CXXTYPES],
[
AT_BISON_OPTION_PUSHDEFS([$1])
AT_DATA_GRAMMAR([types.y],
[[/* Simplified C++ Type and Expression Grammar. */
$1
%{
#include <stdio.h>
union Node {
struct {
int isNterm;
int parents;
} nodeInfo;
struct {
int isNterm; /* 1 */
int parents;
char const *form;
union Node *children[3];
} nterm;
struct {
int isNterm; /* 0 */
int parents;
char *text;
} term;
};
typedef union Node Node;
static Node *new_nterm (char const *, Node *, Node *, Node *);
static Node *new_term (char *);
static void free_node (Node *);
static char *node_to_string (Node *);
#define YYSTYPE Node *
]m4_bmatch([$2], [stmtMerge],
[ static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1);])[
#define YYINITDEPTH 10
#define YYSTACKEXPANDABLE 1
struct YYLTYPE;
#if YYPURE
# if YYLSP_NEEDED
# define LEX_PARAMETERS YYSTYPE *lvalp, struct YYLTYPE *llocp
# define ERROR_PARAMETERS struct YYLTYPE *llocp, char const *s
# else
# define LEX_PARAMETERS YYSTYPE *lvalp
# endif
#endif
#ifndef LEX_PARAMETERS
# define LEX_PARAMETERS void
#endif
#ifndef ERROR_PARAMETERS
# define ERROR_PARAMETERS char const *s
#endif
int yylex (LEX_PARAMETERS);
void yyerror (ERROR_PARAMETERS);
%}
%token TYPENAME ID
%right '='
%left '+'
%glr-parser
%destructor { free_node ($$); } stmt expr decl declarator TYPENAME ID
%%
prog :
| prog stmt {
char *output;]AT_LOCATION_IF([
printf ("%d.%d-%d.%d: ",
@2.first_line, @2.first_column,
@2.last_line, @2.last_column);])[
output = node_to_string (]$[2);
printf ("%s\n", output);
free (output);
free_node (]$[2);
}
;
stmt : expr ';' $2 { $$ = ]$[1; }
| decl $3
| error ';' { $$ = new_nterm ("<error>", 0, 0, 0); }
| '@' { YYACCEPT; }
;
expr : ID
| TYPENAME '(' expr ')'
{ $$ = new_nterm ("<cast>(%s,%s)", ]$[3, ]$[1, 0); }
| expr '+' expr { $$ = new_nterm ("+(%s,%s)", ]$[1, ]$[3, 0); }
| expr '=' expr { $$ = new_nterm ("=(%s,%s)", ]$[1, ]$[3, 0); }
;
decl : TYPENAME declarator ';'
{ $$ = new_nterm ("<declare>(%s,%s)", ]$[1, ]$[2, 0); }
| TYPENAME declarator '=' expr ';'
{ $$ = new_nterm ("<init-declare>(%s,%s,%s)", ]$[1,
]$[2, ]$[4); }
;
declarator : ID
| '(' declarator ')' { $$ = ]$[2; }
;
%%
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
int
main (int argc, char **argv)
{
if (argc != 2)
abort ();
if (!freopen (argv[1], "r", stdin))
return 3;
return yyparse ();
}
int
yylex (LEX_PARAMETERS)
{
char buffer[256];
int c;
unsigned int i;
static int lineNum = 1;
static int colNum = 0;
#if YYPURE
# undef yylloc
# define yylloc (*llocp)
# undef yylval
# define yylval (*lvalp)
#endif
while (1)
{
c = getchar ();
switch (c)
{
case EOF:
return 0;
case '\t':
colNum = (colNum + 7) & ~7;
break;
case ' ': case '\f':
colNum += 1;
break;
case '\n':
lineNum += 1;
colNum = 0;
break;
default:
{
int tok;
#if YYLSP_NEEDED
yylloc.first_line = yylloc.last_line = lineNum;
yylloc.first_column = colNum;
#endif
if (isalpha (c))
{
i = 0;
do
{
buffer[i++] = c;
colNum += 1;
if (i == sizeof buffer - 1)
abort ();
c = getchar ();
}
while (isalnum (c) || c == '_');
ungetc (c, stdin);
buffer[i++] = 0;
tok = isupper ((unsigned char) buffer[0]) ? TYPENAME : ID;
yylval = new_term (strcpy ((char *) malloc (i), buffer));
}
else
{
colNum += 1;
tok = c;
yylval = 0;
}
#if YYLSP_NEEDED
yylloc.last_column = colNum-1;
#endif
return tok;
}
}
}
}
void
yyerror (ERROR_PARAMETERS)
{
#if YYPURE && YYLSP_NEEDED
/* Pacify GCC by using llocp. */
if (! llocp)
abort ();
#endif
fprintf (stderr, "%s\n", s);
}
static Node *
new_nterm (char const *form, Node *child0, Node *child1, Node *child2)
{
Node *node = (Node *) malloc (sizeof (Node));
node->nterm.isNterm = 1;
node->nterm.parents = 0;
node->nterm.form = form;
node->nterm.children[0] = child0;
if (child0)
child0->nodeInfo.parents += 1;
node->nterm.children[1] = child1;
if (child1)
child1->nodeInfo.parents += 1;
node->nterm.children[2] = child2;
if (child2)
child2->nodeInfo.parents += 1;
return node;
}
static Node *
new_term (char *text)
{
Node *node = (Node *) malloc (sizeof (Node));
node->term.isNterm = 0;
node->term.parents = 0;
node->term.text = text;
return node;
}
static void
free_node (Node *node)
{
if (!node)
return;
node->nodeInfo.parents -= 1;
/* Free only if 0 (last parent) or -1 (no parents). */
if (node->nodeInfo.parents > 0)
return;
if (node->nodeInfo.isNterm == 1)
{
free_node (node->nterm.children[0]);
free_node (node->nterm.children[1]);
free_node (node->nterm.children[2]);
}
else
free (node->term.text);
free (node);
}
static char *
node_to_string (Node *node)
{
char *child0;
char *child1;
char *child2;
char *buffer;
if (!node)
{
buffer = (char *) malloc (1);
buffer[0] = 0;
}
else if (node->nodeInfo.isNterm == 1)
{
child0 = node_to_string (node->nterm.children[0]);
child1 = node_to_string (node->nterm.children[1]);
child2 = node_to_string (node->nterm.children[2]);
buffer = (char *) malloc (strlen (node->nterm.form) + strlen (child0)
+ strlen (child1) + strlen (child2) + 1);
sprintf (buffer, node->nterm.form, child0, child1, child2);
free (child0);
free (child1);
free (child2);
}
else
buffer = strdup (node->term.text);
return buffer;
}
]]
m4_bmatch([$2], [stmtMerge],
[[static YYSTYPE
stmtMerge (YYSTYPE x0, YYSTYPE x1)
{
return new_nterm ("<OR>(%s,%s)", x0, x1, 0);
}
]])
)
AT_DATA([test-input],
[[
z + q;
T x;
T x = y;
x = y;
T (x) + y;
T (x);
T (y) = z + q;
T (y y) = z + q;
z + q;
@
This is total garbage, but it should be ignored.
]])
AT_CHECK([bison -o types.c types.y], 0, [], ignore)
AT_COMPILE([types])
AT_BISON_OPTION_POPDEFS
])
m4_define([_AT_RESOLVED_GLR_OUTPUT],
[[+(z,q)
<declare>(T,x)
<init-declare>(T,x,y)
=(x,y)
+(<cast>(x,T),y)
<declare>(T,x)
<init-declare>(T,y,+(z,q))
<error>
+(z,q)
]])
m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC],
[[3.0-3.5: +(z,q)
5.0-5.3: <declare>(T,x)
7.0-7.7: <init-declare>(T,x,y)
9.0-9.5: =(x,y)
11.0-11.9: +(<cast>(x,T),y)
13.0-13.5: <declare>(T,x)
15.0-15.13: <init-declare>(T,y,+(z,q))
17.0-17.15: <error>
19.0-19.5: +(z,q)
]])
m4_define([_AT_AMBIG_GLR_OUTPUT],
[[+(z,q)
<declare>(T,x)
<init-declare>(T,x,y)
=(x,y)
+(<cast>(x,T),y)
<OR>(<declare>(T,x),<cast>(x,T))
<OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
<error>
+(z,q)
]])
m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC],
[[3.0-3.5: +(z,q)
5.0-5.3: <declare>(T,x)
7.0-7.7: <init-declare>(T,x,y)
9.0-9.5: =(x,y)
11.0-11.9: +(<cast>(x,T),y)
13.0-13.5: <OR>(<declare>(T,x),<cast>(x,T))
15.0-15.13: <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
17.0-17.15: <error>
19.0-19.5: +(z,q)
]])
m4_define([_AT_GLR_STDERR],
[[syntax error
]])
m4_define([_AT_VERBOSE_GLR_STDERR],
[[syntax error, unexpected ID, expecting '=' or '+' or ')'
]])
## ---------------------------------------------------- ##
## Compile the grammar described in the documentation. ##
## ---------------------------------------------------- ##
AT_SETUP([GLR: Resolve ambiguity, impure, no locations])
_AT_TEST_GLR_CXXTYPES([],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Resolve ambiguity, impure, locations])
_AT_TEST_GLR_CXXTYPES([%locations],[%dprec 1],[%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
_AT_TEST_GLR_CXXTYPES([%pure-parser],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Resolve ambiguity, pure, locations])
_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, impure, no locations])
_AT_TEST_GLR_CXXTYPES([],
[%merge <stmtMerge>], [%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, impure, locations])
_AT_TEST_GLR_CXXTYPES([%locations],
[%merge <stmtMerge>], [%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
_AT_TEST_GLR_CXXTYPES([%pure-parser],
[%merge <stmtMerge>], [%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, pure, locations])
_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
[%merge <stmtMerge>],[%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
AT_CLEANUP
AT_SETUP([GLR: Verbose messages, resolve ambiguity, impure, no locations])
_AT_TEST_GLR_CXXTYPES([%error-verbose],
[%merge <stmtMerge>], [%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
_AT_AMBIG_GLR_OUTPUT, _AT_VERBOSE_GLR_STDERR)
AT_CLEANUP