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https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
e342c3beaf
Introduce another definition to address simple location arrays. (yyGLRStack): New member: yyerror_range. (yyrecoverSyntaxError, yyparse): Update it. (yyrecoverSyntaxError): Use it when shifting the error token to have an accurate range, equivalent to the one computed by both yacc.c and lalr1.cc. * tests/cxx-type.at (_AT_TEST_GLR_CXXTYPES): Change its yylex so that column numbers start at column 0, as per GNU Coding Standards, the others tests, and the doc. (_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_AMBIG_GLR_OUTPUT_WITH_LOC): Adjust to the above change (first column is 0). And adjust the location of the "<error>", now covering the whole line.
376 lines
8.6 KiB
Plaintext
376 lines
8.6 KiB
Plaintext
# Checking GLR Parsing. -*- Autotest -*-
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# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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# 02111-1307, USA.
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AT_BANNER([[C++ Type Syntax (GLR).]])
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# _AT_TEST_GLR_CXXTYPES(DECL, RESOLVE1, RESOLVE2)
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# -----------------------------------------------
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# Store into types.y the calc program, with DECL inserted as a declaration,
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# and with RESOLVE1 and RESOLVE2 as annotations on the conflicted rule for
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# stmt. Then compile the result.
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m4_define([_AT_TEST_GLR_CXXTYPES],
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[
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AT_BISON_OPTION_PUSHDEFS([$1])
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AT_DATA_GRAMMAR([types.y],
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[[/* Simplified C++ Type and Expression Grammar. */
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$1
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%{
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#include <stdio.h>
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#define YYSTYPE char const *
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]m4_bmatch([$2], [stmtMerge],
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[ static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1);])[
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#define YYINITDEPTH 10
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static char *format (char const *, ...);
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struct YYLTYPE;
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#if YYPURE
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# if YYLSP_NEEDED
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# define LEX_PARAMETERS YYSTYPE *lvalp, struct YYLTYPE *llocp
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# define ERROR_PARAMETERS struct YYLTYPE *llocp, char const *s
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# else
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# define LEX_PARAMETERS YYSTYPE *lvalp
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# endif
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#endif
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#ifndef LEX_PARAMETERS
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# define LEX_PARAMETERS void
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#endif
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#ifndef ERROR_PARAMETERS
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# define ERROR_PARAMETERS char const *s
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#endif
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int yylex (LEX_PARAMETERS);
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int yyerror (ERROR_PARAMETERS);
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%}
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%token TYPENAME ID
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%right '='
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%left '+'
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%glr-parser
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%%
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prog :
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| prog stmt {
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]AT_LOCATION_IF([
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printf ("%d.%d-%d.%d: ",
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@2.first_line, @2.first_column,
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@2.last_line, @2.last_column);])[
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printf ("%s\n", ]$[2);
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}
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;
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stmt : expr ';' $2 { $$ = ]$[1; }
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| decl $3
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| error ';' { $$ = "<error>"; }
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| '@' { YYACCEPT; }
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;
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expr : ID
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| TYPENAME '(' expr ')' { $$ = format ("<cast>(%s,%s)", ]$[3, ]$[1); }
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| expr '+' expr { $$ = format ("+(%s,%s)", ]$[1, ]$[3); }
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| expr '=' expr { $$ = format ("=(%s,%s)", ]$[1, ]$[3); }
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;
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decl : TYPENAME declarator ';'
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{ $$ = format ("<declare>(%s,%s)", ]$[1, ]$[2); }
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| TYPENAME declarator '=' expr ';'
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{ $$ = format ("<init-declare>(%s,%s,%s)", ]$[1, ]$[2, ]$[4); }
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;
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declarator : ID
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| '(' declarator ')' { $$ = ]$[2; }
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;
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%%
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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int
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main (int argc, char **argv)
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{
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if (argc != 2)
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abort ();
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if (!freopen (argv[1], "r", stdin))
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abort ();
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exit (yyparse ());
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}
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int
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yylex (LEX_PARAMETERS)
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{
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char buffer[256];
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int c;
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unsigned int i;
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static int lineNum = 1;
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static int colNum = 0;
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#if YYPURE
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# define yylloc (*llocp)
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# define yylval (*lvalp)
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#endif
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while (1)
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{
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c = getchar ();
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switch (c)
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{
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case EOF:
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return 0;
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case '\t':
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colNum = (colNum + 7) & ~7;
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break;
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case ' ': case '\f':
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colNum += 1;
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break;
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case '\n':
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lineNum += 1;
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colNum = 0;
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break;
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default:
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{
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int tok;
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#if YYLSP_NEEDED
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yylloc.first_line = yylloc.last_line = lineNum;
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yylloc.first_column = colNum;
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#endif
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if (isalpha (c))
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{
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i = 0;
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do
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{
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buffer[i++] = c;
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colNum += 1;
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if (i == sizeof buffer - 1)
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abort ();
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c = getchar ();
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}
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while (isalnum (c) || c == '_');
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ungetc (c, stdin);
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buffer[i++] = 0;
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tok = isupper ((unsigned char) buffer[0]) ? TYPENAME : ID;
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yylval = strcpy (malloc (i), buffer);
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}
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else
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{
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colNum += 1;
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tok = c;
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yylval = "";
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}
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#if YYLSP_NEEDED
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yylloc.last_column = colNum-1;
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#endif
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return tok;
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}
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}
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}
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}
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int
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yyerror (ERROR_PARAMETERS)
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{
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#if YYPURE && YYLSP_NEEDED
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/* Pacify GCC by using llocp. */
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if (! llocp)
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abort ();
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#endif
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fprintf (stderr, "%s\n", s);
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return 0;
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}
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static char *
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format (char const *form, ...)
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{
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char buffer[1024];
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va_list args;
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va_start (args, form);
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vsprintf (buffer, form, args);
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va_end (args);
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return strcpy (malloc (strlen (buffer) + 1), buffer);
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}
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]]
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m4_bmatch([$2], [stmtMerge],
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[[static YYSTYPE
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stmtMerge (YYSTYPE x0, YYSTYPE x1)
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{
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return format ("<OR>(%s,%s)", x0, x1);
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}
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]])
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)
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AT_DATA([test-input],
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[[
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z + q;
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T x;
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T x = y;
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x = y;
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T (x) + y;
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T (x);
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T (y) = z + q;
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T (y y) = z + q;
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z + q;
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@
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This is total garbage, but it should be ignored.
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]])
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AT_CHECK([bison -o types.c types.y], 0, [], ignore)
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AT_COMPILE([types])
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AT_BISON_OPTION_POPDEFS
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])
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m4_define([_AT_RESOLVED_GLR_OUTPUT],
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[[+(z,q)
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<declare>(T,x)
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<init-declare>(T,x,y)
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=(x,y)
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+(<cast>(x,T),y)
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<declare>(T,x)
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<init-declare>(T,y,+(z,q))
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<error>
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+(z,q)
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]])
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m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC],
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[[3.0-3.5: +(z,q)
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5.0-5.3: <declare>(T,x)
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7.0-7.7: <init-declare>(T,x,y)
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9.0-9.5: =(x,y)
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11.0-11.9: +(<cast>(x,T),y)
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13.0-13.5: <declare>(T,x)
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15.0-15.13: <init-declare>(T,y,+(z,q))
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17.0-17.15: <error>
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19.0-19.5: +(z,q)
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]])
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m4_define([_AT_AMBIG_GLR_OUTPUT],
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[[+(z,q)
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<declare>(T,x)
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<init-declare>(T,x,y)
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=(x,y)
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+(<cast>(x,T),y)
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<OR>(<declare>(T,x),<cast>(x,T))
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<OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
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<error>
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+(z,q)
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]])
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m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC],
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[[3.0-3.5: +(z,q)
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5.0-5.3: <declare>(T,x)
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7.0-7.7: <init-declare>(T,x,y)
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9.0-9.5: =(x,y)
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11.0-11.9: +(<cast>(x,T),y)
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13.0-13.5: <OR>(<declare>(T,x),<cast>(x,T))
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15.0-15.13: <OR>(<init-declare>(T,y,+(z,q)),=(<cast>(y,T),+(z,q)))
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17.0-17.15: <error>
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19.0-19.5: +(z,q)
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]])
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m4_define([_AT_GLR_STDERR],
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[[syntax error
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]])
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m4_define([_AT_VERBOSE_GLR_STDERR],
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[[syntax error, unexpected ID, expecting '=' or '+' or ')'
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]])
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## ---------------------------------------------------- ##
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## Compile the grammar described in the documentation. ##
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## ---------------------------------------------------- ##
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AT_SETUP([GLR: Resolve ambiguity, impure, no locations])
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_AT_TEST_GLR_CXXTYPES([],
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[%dprec 1], [%dprec 2])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Resolve ambiguity, impure, locations])
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_AT_TEST_GLR_CXXTYPES([%locations],[%dprec 1],[%dprec 2])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Resolve ambiguity, pure, no locations])
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_AT_TEST_GLR_CXXTYPES([%pure-parser],
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[%dprec 1], [%dprec 2])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_RESOLVED_GLR_OUTPUT, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Resolve ambiguity, pure, locations])
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_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
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[%dprec 1], [%dprec 2])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_RESOLVED_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Merge conflicting parses, impure, no locations])
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_AT_TEST_GLR_CXXTYPES([],
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[%merge <stmtMerge>], [%merge <stmtMerge>])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Merge conflicting parses, impure, locations])
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_AT_TEST_GLR_CXXTYPES([%locations],
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[%merge <stmtMerge>], [%merge <stmtMerge>])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Merge conflicting parses, pure, no locations])
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_AT_TEST_GLR_CXXTYPES([%pure-parser],
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[%merge <stmtMerge>], [%merge <stmtMerge>])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_AMBIG_GLR_OUTPUT, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Merge conflicting parses, pure, locations])
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_AT_TEST_GLR_CXXTYPES([%pure-parser %locations],
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[%merge <stmtMerge>],[%merge <stmtMerge>])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_AMBIG_GLR_OUTPUT_WITH_LOC, _AT_GLR_STDERR)
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AT_CLEANUP
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AT_SETUP([GLR: Verbose messages, resolve ambiguity, impure, no locations])
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_AT_TEST_GLR_CXXTYPES([%error-verbose],
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[%merge <stmtMerge>], [%merge <stmtMerge>])
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AT_PARSER_CHECK([[./types test-input | sed 's/ *$//']], 0,
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_AT_AMBIG_GLR_OUTPUT, _AT_VERBOSE_GLR_STDERR)
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AT_CLEANUP
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