# 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. # 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 #define YYSTYPE char * ]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); %} %token TYPENAME ID %right '=' %left '+' %glr-parser %destructor { free ($$); } TYPENAME ID %% prog : | prog stmt { ]AT_LOCATION_IF([ printf ("%d.%d-%d.%d: ", @2.first_line, @2.first_column, @2.last_line, @2.last_column);])[ printf ("%s\n", ]$[2); } ; stmt : expr ';' $2 { $$ = ]$[1; } | decl $3 | error ';' { static char error_msg[] = ""; $$ = error_msg; } | '@' { YYACCEPT; } ; expr : ID | TYPENAME '(' expr ')' { $$ = format ("(%s,%s)", ]$[3, ]$[1); } | expr '+' expr { $$ = format ("+(%s,%s)", ]$[1, ]$[3); } | expr '=' expr { $$ = format ("=(%s,%s)", ]$[1, ]$[3); } ; decl : TYPENAME declarator ';' { $$ = format ("(%s,%s)", ]$[1, ]$[2); } | TYPENAME declarator '=' expr ';' { $$ = format ("(%s,%s,%s)", ]$[1, ]$[2, ]$[4); } ; declarator : ID | '(' declarator ')' { $$ = ]$[2; } ; %% #include #include #include #include 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 # define yylloc (*llocp) # 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 = 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; } } } } void yyerror (ERROR_PARAMETERS) { #if YYPURE && YYLSP_NEEDED /* Pacify GCC by using llocp. */ if (! llocp) abort (); #endif fprintf (stderr, "%s\n", s); } static char * format (char const *form, ...) { 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); } ]] m4_bmatch([$2], [stmtMerge], [[static YYSTYPE stmtMerge (YYSTYPE x0, YYSTYPE x1) { return format ("(%s,%s)", x0, x1); } ]]) ) 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) (T,x) (T,x,y) =(x,y) +((x,T),y) (T,x) (T,y,+(z,q)) +(z,q) ]]) m4_define([_AT_RESOLVED_GLR_OUTPUT_WITH_LOC], [[3.0-3.5: +(z,q) 5.0-5.3: (T,x) 7.0-7.7: (T,x,y) 9.0-9.5: =(x,y) 11.0-11.9: +((x,T),y) 13.0-13.5: (T,x) 15.0-15.13: (T,y,+(z,q)) 17.0-17.15: 19.0-19.5: +(z,q) ]]) m4_define([_AT_AMBIG_GLR_OUTPUT], [[+(z,q) (T,x) (T,x,y) =(x,y) +((x,T),y) ((T,x),(x,T)) ((T,y,+(z,q)),=((y,T),+(z,q))) +(z,q) ]]) m4_define([_AT_AMBIG_GLR_OUTPUT_WITH_LOC], [[3.0-3.5: +(z,q) 5.0-5.3: (T,x) 7.0-7.7: (T,x,y) 9.0-9.5: =(x,y) 11.0-11.9: +((x,T),y) 13.0-13.5: ((T,x),(x,T)) 15.0-15.13: ((T,y,+(z,q)),=((y,T),+(z,q))) 17.0-17.15: 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 ], [%merge ]) 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 ], [%merge ]) 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 ], [%merge ]) 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 ],[%merge ]) 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 ], [%merge ]) AT_PARSER_CHECK([[./types test-input]], 0, _AT_AMBIG_GLR_OUTPUT, _AT_VERBOSE_GLR_STDERR) AT_CLEANUP