# Checking GLR Parsing. -*- Autotest -*-
-# Copyright (C) 2002, 2003, 2004, 2005 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.
+# Copyright (C) 2002-2013 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 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 Street, Fifth Floor, Boston, MA
-# 02110-1301, USA.
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
AT_BANNER([[C++ Type Syntax (GLR).]])
# 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_BISON_OPTION_PUSHDEFS([%glr-parser $1])
AT_DATA_GRAMMAR([types.y],
[[/* Simplified C++ Type and Expression Grammar. */
$1
-%{
+%code requires
+{
#include <stdio.h>
- #define YYSTYPE char *
+ 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;
+ #define YYSTYPE Node *
+}
+
+%code
+{
+ 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 *);
]m4_bmatch([$2], [stmtMerge],
[ static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1);])[
#define YYINITDEPTH 10
#define YYSTACKEXPANDABLE 1
- static char *format (char const *, ...);
- 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);
-%}
+ ]AT_YYERROR_DECLARE[
+ ]AT_YYLEX_DECLARE[
+}
%token TYPENAME ID
%glr-parser
-%destructor { free ($$); } TYPENAME ID
+%destructor { free_node ($$); } stmt expr decl declarator TYPENAME ID
%%
prog :
| prog stmt {
-]AT_LOCATION_IF([
- printf ("%d.%d-%d.%d: ",
- @2.first_line, @2.first_column,
- @2.last_line, @2.last_column);])[
- printf ("%s\n", ]$[2);
- }
+ char *output;]AT_LOCATION_IF([
+ printf ("%d.%d-%d.%d: ",
+ @2.first_line, @2.first_column,
+ @2.last_line, @2.last_column);])[
+ output = node_to_string (]$[2);
+ printf ("%s\n", output);
+ free (output);
+ free_node (]$[2);
+ }
;
-stmt : expr ';' $2 { $$ = ]$[1; }
+stmt : expr ';' $2 { $$ = ]$[1; }
| decl $3
- | error ';' { static char error_msg[] = "<error>"; $$ = error_msg; }
- | '@' { YYACCEPT; }
+ | error ';' { $$ = new_nterm ("<error>", YY_NULL, YY_NULL, YY_NULL); }
+ | '@' { YYACCEPT; }
;
expr : ID
- | TYPENAME '(' expr ')' { $$ = format ("<cast>(%s,%s)", ]$[3, ]$[1); }
- | expr '+' expr { $$ = format ("+(%s,%s)", ]$[1, ]$[3); }
- | expr '=' expr { $$ = format ("=(%s,%s)", ]$[1, ]$[3); }
+ | TYPENAME '(' expr ')'
+ { $$ = new_nterm ("<cast>(%s,%s)", ]$[3, ]$[1, YY_NULL); }
+ | expr '+' expr { $$ = new_nterm ("+(%s,%s)", ]$[1, ]$[3, YY_NULL); }
+ | expr '=' expr { $$ = new_nterm ("=(%s,%s)", ]$[1, ]$[3, YY_NULL); }
;
decl : TYPENAME declarator ';'
- { $$ = format ("<declare>(%s,%s)", ]$[1, ]$[2); }
+ { $$ = new_nterm ("<declare>(%s,%s)", ]$[1, ]$[2, YY_NULL); }
| TYPENAME declarator '=' expr ';'
- { $$ = format ("<init-declare>(%s,%s,%s)", ]$[1, ]$[2, ]$[4); }
+ { $$ = new_nterm ("<init-declare>(%s,%s,%s)", ]$[1,
+ ]$[2, ]$[4); }
;
declarator : ID
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
+#include <assert.h>
int
main (int argc, char **argv)
{
- if (argc != 2)
- abort ();
+ assert (argc == 2);
if (!freopen (argv[1], "r", stdin))
return 3;
return yyparse ();
}
-int
-yylex (LEX_PARAMETERS)
+]AT_YYERROR_DEFINE[
+
+]AT_YYLEX_PROTOTYPE[
{
char buffer[256];
int c;
static int colNum = 0;
#if YYPURE
+# undef yylloc
# define yylloc (*llocp)
+# undef yylval
# define yylval (*lvalp)
#endif
while (1)
{
+ assert (!feof (stdin));
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 = strcpy ((char *) malloc (i), buffer);
- }
- else
- {
- static char empty_string[] = "";
- colNum += 1;
- tok = c;
- yylval = empty_string;
- }
-#if YYLSP_NEEDED
- yylloc.last_column = colNum-1;
-#endif
- return tok;
- }
- }
+ {
+ 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;]AT_LOCATION_IF([[
+ yylloc.first_line = yylloc.last_line = lineNum;
+ yylloc.first_column = colNum;]])[
+ if (isalpha (c))
+ {
+ i = 0;
+
+ do
+ {
+ buffer[i++] = c;
+ colNum += 1;
+ assert (i != sizeof buffer - 1);
+ 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 = YY_NULL;
+ }]AT_LOCATION_IF([[
+ yylloc.last_column = colNum-1;]])[
+ return tok;
+ }
+ }
}
}
-void
-yyerror (ERROR_PARAMETERS)
+static Node *
+new_nterm (char const *form, Node *child0, Node *child1, Node *child2)
{
-#if YYPURE && YYLSP_NEEDED
- /* Pacify GCC by using llocp. */
- if (! llocp)
- abort ();
-#endif
- fprintf (stderr, "%s\n", s);
+ 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 *
-format (char const *form, ...)
+node_to_string (Node *node)
{
- char buffer[1024];
- va_list args;
- va_start (args, form);
- vsprintf (buffer, form, args);
- va_end (args);
- return strcpy ((char *) malloc (strlen (buffer) + 1), buffer);
+ 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;
}
]]
[[static YYSTYPE
stmtMerge (YYSTYPE x0, YYSTYPE x1)
{
- return format ("<OR>(%s,%s)", x0, x1);
+ return new_nterm ("<OR>(%s,%s)", x0, x1, YY_NULL);
}
]])
)
This is total garbage, but it should be ignored.
]])
-AT_CHECK([bison -o types.c types.y], 0, [], ignore)
+AT_BISON_CHECK([-o types.c types.y], 0, [], ignore)
AT_COMPILE([types])
AT_BISON_OPTION_POPDEFS
])
[[syntax error
]])
+m4_define([_AT_GLR_STDERR_WITH_LOC],
+[[17.5: syntax error
+]])
+
m4_define([_AT_VERBOSE_GLR_STDERR],
[[syntax error, unexpected ID, expecting '=' or '+' or ')'
]])
+m4_define([_AT_VERBOSE_GLR_STDERR_WITH_LOC],
+[[17.5: syntax error, unexpected ID, expecting '=' or '+' or ')'
+]])
+
## ---------------------------------------------------- ##
## Compile the grammar described in the documentation. ##
## ---------------------------------------------------- ##
_AT_TEST_GLR_CXXTYPES([],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
- _AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
+ [_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_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
AT_CLEANUP
AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
-_AT_TEST_GLR_CXXTYPES([%pure-parser],
+_AT_TEST_GLR_CXXTYPES([%define api.pure],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
- _AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
+ [_AT_RESOLVED_GLR_OUTPUT], [_AT_GLR_STDERR])
AT_CLEANUP
AT_SETUP([GLR: Resolve ambiguity, pure, locations])
-_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
+_AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
[%dprec 1], [%dprec 2])
AT_PARSER_CHECK([[./types test-input]], 0,
- _AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
+ [_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
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_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_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
-_AT_TEST_GLR_CXXTYPES([%pure-parser],
+_AT_TEST_GLR_CXXTYPES([%define api.pure],
[%merge <stmtMerge>], [%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
- _AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
+ [_AT_AMBIG_GLR_OUTPUT], [_AT_GLR_STDERR])
AT_CLEANUP
AT_SETUP([GLR: Merge conflicting parses, pure, locations])
-_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
+_AT_TEST_GLR_CXXTYPES([%define api.pure %locations],
[%merge <stmtMerge>],[%merge <stmtMerge>])
AT_PARSER_CHECK([[./types test-input]], 0,
- _AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
+ [_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [_AT_GLR_STDERR_WITH_LOC])
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_AMBIG_GLR_OUTPUT], [_AT_VERBOSE_GLR_STDERR])
AT_CLEANUP
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