X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/5504898e82be0ce888fff5a28a48530fa156625f..5d614dfa8c3b98804a88239d1c80f3b20e56b7df:/tests/regression.at diff --git a/tests/regression.at b/tests/regression.at index d1d819e6..c2795f66 100644 --- a/tests/regression.at +++ b/tests/regression.at @@ -1,42 +1,187 @@ # Bison Regressions. -*- Autotest -*- -# Copyright (C) 2001, 2002 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) 2001-2012 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., 59 Temple Place - Suite 330, Boston, MA -# 02111-1307, USA. +# along with this program. If not, see . AT_BANNER([[Regression tests.]]) +## ------------------ ## +## Trivial grammars. ## +## ------------------ ## + +AT_SETUP([Trivial grammars]) + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ +#define YYSTYPE int * +%} + +%error-verbose + +%% + +program: 'x'; +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input.o]) +AT_COMPILE([input.o], [-DYYDEBUG -c input.c]) + +AT_CLEANUP + + + +## ----------------- ## +## YYSTYPE typedef. ## +## ----------------- ## + +AT_SETUP([YYSTYPE typedef]) + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ +typedef union { char const *val; } YYSTYPE; +%} + +%type program + +%% + +program: { $$ = ""; }; +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input.o]) + +AT_CLEANUP + + + +## ------------------------------------- ## +## Early token definitions with --yacc. ## +## ------------------------------------- ## + + +AT_SETUP([Early token definitions with --yacc]) + +# Found in GCJ: they expect the tokens to be defined before the user +# prologue, so that they can use the token definitions in it. + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ +%} + +%union +{ + int val; +}; +%{ +#ifndef MY_TOKEN +# error "MY_TOKEN not defined." +#endif +%} +%token MY_TOKEN +%% +exp: MY_TOKEN; +%% +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-y -o input.c input.y]) +AT_COMPILE([input.o]) + +AT_CLEANUP + + + +## ---------------------------------------- ## +## Early token definitions without --yacc. ## +## ---------------------------------------- ## + + +AT_SETUP([Early token definitions without --yacc]) + +# Found in GCJ: they expect the tokens to be defined before the user +# prologue, so that they can use the token definitions in it. + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ +#include +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ +void print_my_token (void); +%} + +%union +{ + int val; +}; +%{ +void +print_my_token (void) +{ + enum yytokentype my_token = MY_TOKEN; + printf ("%d\n", my_token); +} +%} +%token MY_TOKEN +%% +exp: MY_TOKEN; +%% +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input.o]) + +AT_CLEANUP + + + ## ---------------- ## ## Braces parsing. ## ## ---------------- ## -AT_SETUP([braces parsing]) +AT_SETUP([Braces parsing]) +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], -[[/* Bison used to swallow the character after `}'. */ +[[/* Bison used to swallow the character after '}'. */ %% exp: { tests = {{{{{{{{{{}}}}}}}}}}; }; %% ]]) +AT_BISON_OPTION_POPDEFS -AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore) +AT_BISON_CHECK([-v -o input.c input.y]) -AT_CHECK([fgrep 'tests = {{{{{{{{{{}}}}}}}}}};' input.c], 0, [ignore]) +AT_CHECK([grep 'tests = {{{{{{{{{{}}}}}}}}}};' input.c], 0, [ignore]) AT_CLEANUP @@ -48,8 +193,9 @@ AT_CLEANUP AT_SETUP([Duplicate string]) +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], -[[/* `Bison -v' used to dump core when two tokens are defined with the same +[[/* 'Bison -v' used to dump core when two tokens are defined with the same string, as LE and GE below. */ %token NUM @@ -60,8 +206,11 @@ AT_DATA([input.y], exp: '(' exp ')' | NUM ; %% ]]) +AT_BISON_OPTION_POPDEFS -AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore) +AT_BISON_CHECK([-v -o input.c input.y], 0, [], +[[input.y:6.8-14: warning: symbol "<=" used more than once as a literal string +]]) AT_CLEANUP @@ -72,6 +221,9 @@ AT_CLEANUP AT_SETUP([Rule Line Numbers]) +AT_KEYWORDS([report]) + +AT_BISON_OPTION_PUSHDEFS AT_DATA([input.y], [[%% expr: @@ -101,24 +253,28 @@ expr: }; ]]) +AT_BISON_OPTION_POPDEFS -AT_CHECK([bison input.y -o input.c -v], 0, [], []) +AT_BISON_CHECK([-o input.c -v input.y]) # Check the contents of the report. AT_CHECK([cat input.output], [], [[Grammar - Number, Line, Rule - 0 2 $axiom -> expr $ - 1 2 @1 -> /* empty */ - 2 2 expr -> 'a' @1 'b' - 3 15 @2 -> /* empty */ - 4 15 expr -> @2 'c' + 0 $accept: expr $end + + 1 $@1: /* empty */ + + 2 expr: 'a' $@1 'b' + + 3 $@2: /* empty */ + + 4 expr: $@2 'c' Terminals, with rules where they appear -$ (0) 0 +$end (0) 0 'a' (97) 2 'b' (98) 2 'c' (99) 4 @@ -127,86 +283,77 @@ error (256) Nonterminals, with rules where they appear -$axiom (6) +$accept (6) on left: 0 expr (7) on left: 2 4, on right: 0 -@1 (8) +$@1 (8) on left: 1, on right: 2 -@2 (9) +$@2 (9) on left: 3, on right: 4 state 0 - $axiom -> . expr $ (rule 0) - - 'a' shift, and go to state 1 + 0 $accept: . expr $end - $default reduce using rule 3 (@2) + 'a' shift, and go to state 1 - expr go to state 2 - @2 go to state 3 + $default reduce using rule 3 ($@2) + expr go to state 2 + $@2 go to state 3 state 1 - expr -> 'a' . @1 'b' (rule 2) + 2 expr: 'a' . $@1 'b' - $default reduce using rule 1 (@1) - - @1 go to state 4 + $default reduce using rule 1 ($@1) + $@1 go to state 4 state 2 - $axiom -> expr . $ (rule 0) - - $ shift, and go to state 5 + 0 $accept: expr . $end + $end shift, and go to state 5 state 3 - expr -> @2 . 'c' (rule 4) - - 'c' shift, and go to state 6 + 4 expr: $@2 . 'c' + 'c' shift, and go to state 6 state 4 - expr -> 'a' @1 . 'b' (rule 2) - - 'b' shift, and go to state 7 + 2 expr: 'a' $@1 . 'b' + 'b' shift, and go to state 7 state 5 - $axiom -> expr $ . (rule 0) + 0 $accept: expr $end . - $default accept + $default accept state 6 - expr -> @2 'c' . (rule 4) - - $default reduce using rule 4 (expr) + 4 expr: $@2 'c' . + $default reduce using rule 4 (expr) state 7 - expr -> 'a' @1 'b' . (rule 2) - - $default reduce using rule 2 (expr) - - + 2 expr: 'a' $@1 'b' . + $default reduce using rule 2 (expr) ]]) AT_CLEANUP @@ -230,7 +377,7 @@ exp: ; %% ]]) -AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore) +AT_BISON_CHECK([-v -o input.c input.y]) AT_CLEANUP @@ -247,40 +394,41 @@ AT_DATA([input.y], [[%% ? default: 'a' } -%{ %& -%a +%a-does-not-exist %- +%{ ]]) -AT_CHECK([bison input.y], [1], [], -[[input.y:2: invalid input: `?' -input.y:3: invalid input: `}' -input.y:4: invalid input: `%{' -input.y:5: invalid input: `%&' -input.y:6: invalid input: `%a' -input.y:7: invalid input: `%-' +AT_BISON_CHECK([input.y], [1], [], +[[input.y:2.1: invalid character: '?' +input.y:3.14: invalid character: '}' +input.y:4.1: invalid character: '%' +input.y:4.2: invalid character: '&' +input.y:5.1-17: invalid directive: '%a-does-not-exist' +input.y:6.1: invalid character: '%' +input.y:6.2: invalid character: '-' +input.y:7.1-8.0: missing '%}' at end of file +input.y:7.1-8.0: syntax error, unexpected %{...%} ]]) AT_CLEANUP - -## -------------------- ## -## Invalid %directive. ## -## -------------------- ## - - -AT_SETUP([Invalid %directive]) +AT_SETUP([Invalid inputs with {}]) AT_DATA([input.y], -[[%invalid +[[ +%destructor +%initial-action +%lex-param +%parse-param +%printer +%union ]]) -AT_CHECK([bison input.y], [1], [], -[[input.y:1: unrecognized: %invalid -input.y:1: Skipping to next % -input.y:2: fatal error: no input grammar +AT_BISON_CHECK([input.y], [1], [], +[[input.y:3.1-15: syntax error, unexpected %initial-action, expecting {...} ]]) AT_CLEANUP @@ -294,25 +442,84 @@ AT_CLEANUP AT_SETUP([Token definitions]) -# Bison managed, when fed with `%token 'f' "f"' to #define 'f'! -AT_DATA([input.y], +AT_BISON_OPTION_PUSHDEFS +# Bison managed, when fed with '%token 'f' "f"' to #define 'f'! +AT_DATA_GRAMMAR([input.y], [%{ -void yyerror (const char *s); -int yylex (void); +#include +#include +]AT_YYERROR_DECLARE[ +]AT_YYLEX_DECLARE[ %} -[%token "end of file" +[%error-verbose +%token MYEOF 0 "end of file" %token 'a' "a" -%token "b" 'b' -%token "c" c -%token d "d" -%token e 'e' -%token 'f' e +%token B_TOKEN "b" +%token C_TOKEN 'c' +%token 'd' D_TOKEN +%token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!" +%token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!" +%% +exp: "a" "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"; %% -exp: "a"; +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([{ SPECIAL }])[ + +int +main (void) +{ + return yyparse (); +} +]]) +AT_BISON_OPTION_POPDEFS + +# Checking the warning message guarantees that the trigraph "??!" isn't +# unnecessarily escaped here even though it would need to be if encoded in a +# C-string literal. Also notice that unnecessary escaping, such as "\?", from +# the user specification is eliminated. +AT_BISON_CHECK([-o input.c input.y], [[0]], [[]], +[[input.y:22.8-14: warning: symbol SPECIAL redeclared +input.y:22.8-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string +]]) +AT_COMPILE([input]) + +# Checking the error message here guarantees that yytname, which does contain +# C-string literals, does have the trigraph escaped correctly. Thus, the +# symbol name reported by the parser is exactly the same as that reported by +# Bison itself. +AT_DATA([experr], +[[syntax error, unexpected "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!", expecting a ]]) +AT_PARSER_CHECK([./input], 1, [], [experr]) +AT_CLEANUP + + -AT_CHECK([bison input.y -o input.c]) -AT_CHECK([$CC $CFLAGS $CPPFLAGS input.c -c]) +## -------------------- ## +## Characters Escapes. ## +## -------------------- ## + + +AT_SETUP([Characters Escapes]) + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[%{ +]AT_YYERROR_DECLARE_EXTERN[ +]AT_YYLEX_DECLARE_EXTERN[ +%} +[%% +exp: + '\'' "\'" +| '\"' "\"" +| '"' "'" /* Pacify font-lock-mode: ". */ +; +]]) + +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input.o]) AT_CLEANUP @@ -323,11 +530,13 @@ AT_CLEANUP # The generation of the reduction was once wrong in Bison, and made it # miss some reductions. In the following test case, the reduction on -# `undef_id_tok' in state 1 was missing. This is stripped down from +# 'undef_id_tok' in state 1 was missing. This is stripped down from # the actual web2c.y. AT_SETUP([Web2c Report]) +AT_KEYWORDS([report]) + AT_DATA([input.y], [[%token undef_id_tok const_id_tok @@ -347,29 +556,37 @@ CONST_DEC: { } undef_id_tok '=' const_id_tok ';' ; %% - ]]) -AT_CHECK([bison -v input.y]) - -AT_CHECK([sed -n 's/ *$//;/^$/!p' input.output], 0, +AT_BISON_CHECK([-v input.y]) +AT_CHECK([cat input.output], 0, [[Grammar - Number, Line, Rule - 0 6 $axiom -> CONST_DEC_PART $ - 1 6 CONST_DEC_PART -> CONST_DEC_LIST - 2 10 CONST_DEC_LIST -> CONST_DEC - 3 12 CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC - 4 15 @1 -> /* empty */ - 5 15 CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';' + + 0 $accept: CONST_DEC_PART $end + + 1 CONST_DEC_PART: CONST_DEC_LIST + + 2 CONST_DEC_LIST: CONST_DEC + 3 | CONST_DEC_LIST CONST_DEC + + 4 $@1: /* empty */ + + 5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' + + Terminals, with rules where they appear -$ (0) 0 + +$end (0) 0 ';' (59) 5 '=' (61) 5 error (256) undef_id_tok (258) 5 const_id_tok (259) 5 + + Nonterminals, with rules where they appear -$axiom (7) + +$accept (7) on left: 0 CONST_DEC_PART (8) on left: 1, on right: 0 @@ -377,49 +594,95 @@ CONST_DEC_LIST (9) on left: 2 3, on right: 1 3 CONST_DEC (10) on left: 5, on right: 2 3 -@1 (11) +$@1 (11) on left: 4, on right: 5 + + state 0 - $axiom -> . CONST_DEC_PART $ (rule 0) - $default reduce using rule 4 (@1) - CONST_DEC_PART go to state 1 - CONST_DEC_LIST go to state 2 - CONST_DEC go to state 3 - @1 go to state 4 + + 0 $accept: . CONST_DEC_PART $end + + $default reduce using rule 4 ($@1) + + CONST_DEC_PART go to state 1 + CONST_DEC_LIST go to state 2 + CONST_DEC go to state 3 + $@1 go to state 4 + + state 1 - $axiom -> CONST_DEC_PART . $ (rule 0) - $ shift, and go to state 5 + + 0 $accept: CONST_DEC_PART . $end + + $end shift, and go to state 5 + + state 2 - CONST_DEC_PART -> CONST_DEC_LIST . (rule 1) - CONST_DEC_LIST -> CONST_DEC_LIST . CONST_DEC (rule 3) - undef_id_tok reduce using rule 4 (@1) - $default reduce using rule 1 (CONST_DEC_PART) - CONST_DEC go to state 6 - @1 go to state 4 + + 1 CONST_DEC_PART: CONST_DEC_LIST . + 3 CONST_DEC_LIST: CONST_DEC_LIST . CONST_DEC + + undef_id_tok reduce using rule 4 ($@1) + $default reduce using rule 1 (CONST_DEC_PART) + + CONST_DEC go to state 6 + $@1 go to state 4 + + state 3 - CONST_DEC_LIST -> CONST_DEC . (rule 2) - $default reduce using rule 2 (CONST_DEC_LIST) + + 2 CONST_DEC_LIST: CONST_DEC . + + $default reduce using rule 2 (CONST_DEC_LIST) + + state 4 - CONST_DEC -> @1 . undef_id_tok '=' const_id_tok ';' (rule 5) - undef_id_tok shift, and go to state 7 + + 5 CONST_DEC: $@1 . undef_id_tok '=' const_id_tok ';' + + undef_id_tok shift, and go to state 7 + + state 5 - $axiom -> CONST_DEC_PART $ . (rule 0) - $default accept + + 0 $accept: CONST_DEC_PART $end . + + $default accept + + state 6 - CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC . (rule 3) - $default reduce using rule 3 (CONST_DEC_LIST) + + 3 CONST_DEC_LIST: CONST_DEC_LIST CONST_DEC . + + $default reduce using rule 3 (CONST_DEC_LIST) + + state 7 - CONST_DEC -> @1 undef_id_tok . '=' const_id_tok ';' (rule 5) - '=' shift, and go to state 8 + + 5 CONST_DEC: $@1 undef_id_tok . '=' const_id_tok ';' + + '=' shift, and go to state 8 + + state 8 - CONST_DEC -> @1 undef_id_tok '=' . const_id_tok ';' (rule 5) - const_id_tok shift, and go to state 9 + + 5 CONST_DEC: $@1 undef_id_tok '=' . const_id_tok ';' + + const_id_tok shift, and go to state 9 + + state 9 - CONST_DEC -> @1 undef_id_tok '=' const_id_tok . ';' (rule 5) - ';' shift, and go to state 10 + + 5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok . ';' + + ';' shift, and go to state 10 + + state 10 - CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';' . (rule 5) - $default reduce using rule 5 (CONST_DEC) + + 5 CONST_DEC: $@1 undef_id_tok '=' const_id_tok ';' . + + $default reduce using rule 5 (CONST_DEC) ]]) AT_CLEANUP @@ -429,7 +692,7 @@ AT_CLEANUP ## Web2c Actions. ## ## --------------- ## -# The generation of the mapping `state -> action' was once wrong in +# The generation of the mapping 'state -> action' was once wrong in # extremely specific situations. web2c.y exhibits this situation. # Below is a stripped version of the grammar. It looks like one can # simplify it further, but just don't: it is tuned to exhibit a bug, @@ -437,7 +700,7 @@ AT_CLEANUP # # It used to be wrong on yydefact only: # -# static const short yydefact[] = +# static const yytype_uint8 yydefact[] = # { # - 2, 0, 1, 0, 0, 2, 3, 2, 5, 4, # + 2, 0, 1, 0, 0, 0, 3, 2, 5, 4, @@ -449,6 +712,8 @@ AT_CLEANUP AT_SETUP([Web2c Actions]) +AT_KEYWORDS([report]) + AT_DATA([input.y], [[%% statement: struct_stat; @@ -458,12 +723,13 @@ else: "else" statement; %% ]]) -AT_CHECK([bison -v input.y -o input.c]) +AT_BISON_CHECK([-v -o input.c input.y]) + +# Check only the tables. +[sed -n 's/ *$//;/^static const.*\[\] =/,/^}/p' input.c >tables.c] -# Check only the tables. We don't use --no-parser, because it is -# still to be implemented in the experimental branch of Bison. -AT_CHECK([[sed -n 's/ *$//;/^static const.*\[\] =/,/^}/p' input.c]], 0, -[[static const unsigned char yytranslate[] = +AT_CHECK([[cat tables.c]], 0, +[[static const yytype_uint8 yytranslate[] = { 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, @@ -493,63 +759,63 @@ AT_CHECK([[sed -n 's/ *$//;/^static const.*\[\] =/,/^}/p' input.c]], 0, 2, 2, 2, 2, 2, 2, 1, 2, 3, 4, 5, 6 }; -static const unsigned char yyprhs[] = +static const yytype_uint8 yyprhs[] = { 0, 0, 3, 5, 6, 9, 14 }; -static const signed char yyrhs[] = +static const yytype_int8 yyrhs[] = { 8, 0, -1, 9, -1, -1, 10, 11, -1, 3, 4, 5, 8, -1, 6, 8, -1 }; -static const unsigned char yyrline[] = +static const yytype_uint8 yyrline[] = { 0, 2, 2, 3, 3, 4, 5 }; static const char *const yytname[] = { - "$", "error", "$undefined.", "\"if\"", "\"const\"", "\"then\"", - "\"else\"", "$axiom", "statement", "struct_stat", "if", "else", 0 + "$end", "error", "$undefined", "\"if\"", "\"const\"", "\"then\"", + "\"else\"", "$accept", "statement", "struct_stat", "if", "else", YY_NULL }; -static const short yytoknum[] = +static const yytype_uint16 yytoknum[] = { - 0, 256, 257, 258, 259, 260, 261, -1 + 0, 256, 257, 258, 259, 260, 261 }; -static const unsigned char yyr1[] = +static const yytype_uint8 yyr1[] = { 0, 7, 8, 9, 9, 10, 11 }; -static const unsigned char yyr2[] = +static const yytype_uint8 yyr2[] = { 0, 2, 1, 0, 2, 4, 2 }; -static const short yydefact[] = +static const yytype_uint8 yydefact[] = { - 3, 0, 0, 2, 0, 0, 0, 3, 4, 3, + 3, 0, 0, 2, 0, 0, 1, 3, 4, 3, 6, 5 }; -static const short yydefgoto[] = +static const yytype_int8 yydefgoto[] = { -1, 2, 3, 4, 8 }; -static const short yypact[] = +static const yytype_int8 yypact[] = { - -2, -1, 4,-32768, 0, 2,-32768, -2,-32768, -2, - -32768,-32768 + -2, -1, 4, -8, 0, 2, -8, -2, -8, -2, + -8, -8 }; -static const short yypgoto[] = +static const yytype_int8 yypgoto[] = { - -32768, -7,-32768,-32768,-32768 + -8, -7, -8, -8, -8 }; -static const short yytable[] = +static const yytype_uint8 yytable[] = { 10, 1, 11, 5, 6, 0, 7, 9 }; -static const short yycheck[] = +static const yytype_int8 yycheck[] = { 7, 3, 9, 4, 0, -1, 6, 5 }; -static const unsigned char yystos[] = +static const yytype_uint8 yystos[] = { 0, 3, 8, 9, 10, 4, 0, 6, 11, 5, 8, 8 @@ -557,3 +823,765 @@ static const unsigned char yystos[] = ]]) AT_CLEANUP + + +## ------------------------- ## +## yycheck Bound Violation. ## +## ------------------------- ## + + +# _AT_DATA_DANCER_Y(BISON-OPTIONS) +# -------------------------------- +# The following grammar, taken from Andrew Suffield's GPL'd implementation +# of DGMTP, the Dancer Generic Message Transport Protocol, used to violate +# yycheck's bounds where issuing a verbose error message. Keep this test +# so that possible bound checking compilers could check all the skeletons. +m4_define([_AT_DATA_DANCER_Y], +[AT_DATA_GRAMMAR([dancer.y], +[[%code provides +{ + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ +} +$1 +%token ARROW INVALID NUMBER STRING DATA +%defines +%verbose +%error-verbose +/* Grammar follows */ +%% +line: header body + ; + +header: '<' from ARROW to '>' type ':' + | '<' ARROW to '>' type ':' + | ARROW to type ':' + | type ':' + | '<' '>' + ; + +from: DATA + | STRING + | INVALID + ; + +to: DATA + | STRING + | INVALID + ; + +type: DATA + | STRING + | INVALID + ; + +body: /* empty */ + | body member + ; + +member: STRING + | DATA + | '+' NUMBER + | '-' NUMBER + | NUMBER + | INVALID + ; +%% +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([":"])[ +]AT_LALR1_CC_IF( +[int +yyparse () +{ + yy::parser parser; +#if YYDEBUG + parser.set_debug_level (YYDEBUG); +#endif + return parser.parse (); +} +])[ + +int +main (void) +{ + return yyparse (); +} +]]) +])# _AT_DATA_DANCER_Y + + +# AT_CHECK_DANCER(BISON-OPTIONS) +# ------------------------------ +# Generate the grammar, compile it, run it. +m4_define([AT_CHECK_DANCER], +[AT_SETUP([Dancer $1]) +AT_BISON_OPTION_PUSHDEFS([$1]) +_AT_DATA_DANCER_Y([$1]) +AT_BISON_CHECK([-o dancer.c dancer.y]) +AT_FULL_COMPILE([dancer]) +AT_PARSER_CHECK([./dancer], 1, [], +[syntax error, unexpected ':' +]) +AT_BISON_OPTION_POPDEFS +AT_CLEANUP +]) + +AT_CHECK_DANCER() +AT_CHECK_DANCER([%glr-parser]) +AT_CHECK_DANCER([%skeleton "lalr1.cc"]) + + +## ------------------------------------------ ## +## Diagnostic that expects two alternatives. ## +## ------------------------------------------ ## + + +# _AT_DATA_EXPECT2_Y(BISON-OPTIONS) +# -------------------------------- +m4_define([_AT_DATA_EXPECT2_Y], +[AT_DATA_GRAMMAR([expect2.y], +[[%{ +static int yylex (]AT_LALR1_CC_IF([int *], [void])); +AT_LALR1_CC_IF([], +[[#include +#include +]AT_YYERROR_DECLARE])[ +%} +$1 +%defines +%error-verbose +%token A 1000 +%token B + +%% +program: /* empty */ + | program e ';' + | program error ';'; + +e: e '+' t | t; +t: A | B; + +%% +]AT_YYERROR_DEFINE[ +]AT_LALR1_CC_IF( +[int +yyparse () +{ + yy::parser parser; + return parser.parse (); +} +])[ + +#include +static int +yylex (]AT_LALR1_CC_IF([int *lval], [void])[) +{ + static int const tokens[] = + { + 1000, '+', '+', -1 + }; + static size_t toknum; + ]AT_LALR1_CC_IF([*lval = 0; /* Pacify GCC. */])[ + assert (toknum < sizeof tokens / sizeof *tokens); + return tokens[toknum++]; +} + +int +main (void) +{ + return yyparse (); +} +]]) +])# _AT_DATA_EXPECT2_Y + + +# AT_CHECK_EXPECT2(BISON-OPTIONS) +# ------------------------------- +# Generate the grammar, compile it, run it. +m4_define([AT_CHECK_EXPECT2], +[AT_SETUP([Expecting two tokens $1]) +AT_BISON_OPTION_PUSHDEFS([$1]) +_AT_DATA_EXPECT2_Y([$1]) +AT_BISON_CHECK([-o expect2.c expect2.y]) +AT_FULL_COMPILE([expect2]) +AT_PARSER_CHECK([./expect2], 1, [], +[syntax error, unexpected '+', expecting A or B +]) +AT_BISON_OPTION_POPDEFS +AT_CLEANUP +]) + +AT_CHECK_EXPECT2() +AT_CHECK_EXPECT2([%glr-parser]) +AT_CHECK_EXPECT2([%skeleton "lalr1.cc"]) + + + +## --------------------------------------------- ## +## Braced code in declaration in rules section. ## +## --------------------------------------------- ## + +AT_SETUP([Braced code in declaration in rules section]) + +# Bison once mistook braced code in a declaration in the rules section to be a +# rule action. +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ +#include +]AT_YYERROR_DECLARE[ +]AT_YYLEX_DECLARE[ +%} + +%error-verbose + +%% + +start: + { + printf ("Bison would once convert this action to a midrule because of the" + " subsequent braced code.\n"); + } + ; + +%destructor { fprintf (stderr, "DESTRUCTOR\n"); } 'a'; +%printer { fprintf (yyoutput, "PRINTER"); } 'a'; + +%% +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE(["a"])[ + +int +main (void) +{ + yydebug = 1; + return !yyparse (); +} +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([-t -o input.c input.y]) +AT_COMPILE([input]) +AT_PARSER_CHECK([./input], 0, +[[Bison would once convert this action to a midrule because of the subsequent braced code. +]], +[[Starting parse +Entering state 0 +Reducing stack by rule 1 (line 20): +-> $$ = nterm start () +Stack now 0 +Entering state 1 +Reading a token: Next token is token 'a' (PRINTER) +syntax error, unexpected 'a', expecting $end +Error: popping nterm start () +Stack now 0 +Cleanup: discarding lookahead token 'a' (PRINTER) +DESTRUCTOR +Stack now 0 +]]) + +AT_CLEANUP + + + +## --------------------------------- ## +## String alias declared after use. ## +## --------------------------------- ## + +AT_SETUP([String alias declared after use]) + +# Bison once incorrectly asserted that the symbol number for either a token or +# its alias was the highest symbol number so far at the point of the alias +# declaration. That was true unless the declaration appeared after their first +# uses and other tokens appeared in between. + +AT_DATA([input.y], +[[%% +start: 'a' "A" 'b'; +%token 'a' "A"; +]]) + +AT_BISON_CHECK([-t -o input.c input.y]) + +AT_CLEANUP + + + +## -------------------------------- ## +## Extra lookahead sets in report. ## +## -------------------------------- ## + +AT_SETUP([[Extra lookahead sets in report]]) + +# Bison prints each reduction's lookahead set only next to the associated +# state's one item that (1) is associated with the same rule as the reduction +# and (2) has its dot at the end of its RHS. Previously, Bison also +# erroneously printed the lookahead set next to all of the state's other items +# associated with the same rule. This bug affected only the '.output' file and +# not the generated parser source code. + +AT_DATA([[input.y]], +[[%% +start: a | 'a' a 'a' ; +a: 'a' ; +]]) + +AT_BISON_CHECK([[--report=all input.y]]) +AT_CHECK([[sed -n '/^state 1$/,/^state 2$/p' input.output]], [[0]], +[[state 1 + + 2 start: 'a' . a 'a' + 3 a: . 'a' + 3 | 'a' . [$end] + + 'a' shift, and go to state 4 + + $default reduce using rule 3 (a) + + a go to state 5 + + +state 2 +]]) + +AT_CLEANUP + + + +## ---------------------------------------- ## +## Token number in precedence declaration. ## +## ---------------------------------------- ## + +AT_SETUP([[Token number in precedence declaration]]) + +# POSIX says token numbers can be declared in %left, %right, and %nonassoc, but +# we lost this in Bison 1.50. +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%{ + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ +%} + +%error-verbose +%right END 0 +%left TK1 1 TK2 2 "tok alias" 3 + +%% + +start: + TK1 sr_conflict "tok alias" + | start %prec END + ; +sr_conflict: + TK2 + | TK2 "tok alias" + ; + +%% + +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE([{ 1, 2, 3, 0 }])[ + +int +main (void) +{ + return yyparse (); +} +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([[-o input.c input.y]], [[0]],, +[[input.y:23.5-19: warning: rule useless in parser due to conflicts: start: start +input.y:27.5-19: warning: rule useless in parser due to conflicts: sr_conflict: TK2 "tok alias" +]]) +AT_COMPILE([[input]]) +AT_PARSER_CHECK([[./input]]) + +AT_CLEANUP + + + +## --------------------------- ## +## parse-gram.y: LALR = IELR. ## +## --------------------------- ## + +# If parse-gram.y's LALR and IELR parser tables ever begin to differ, we +# need to fix parse-gram.y or start using IELR. + +AT_SETUP([[parse-gram.y: LALR = IELR]]) + +# Avoid differences in synclines by telling bison that the output files +# have the same name. +[cp $abs_top_srcdir/src/parse-gram.y input.y] +AT_BISON_CHECK([[-o input.c -Dlr.type=lalr input.y]]) +[mv input.c lalr.c] +AT_CAPTURE_FILE([lalr.c]) +AT_BISON_CHECK([[-o input.c -Dlr.type=ielr input.y]]) +[mv input.c ielr.c] +AT_CAPTURE_FILE([ielr.c]) +AT_CHECK([[diff lalr.c ielr.c]], [[0]]) + +AT_CLEANUP + + + +## --------------------------------------- ## +## %error-verbose and YYSTACK_USE_ALLOCA. ## +## --------------------------------------- ## + +AT_SETUP([[%error-verbose and YYSTACK_USE_ALLOCA]]) + +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ + #define YYSTACK_USE_ALLOCA 1 +} + +%error-verbose + +%% + +start: check syntax_error syntax_error ; + +check: +{ + if (128 < sizeof yymsgbuf) + { + fprintf (stderr, + "The initial size of yymsgbuf in yyparse has increased\n" + "since this test group was last updated. As a result,\n" + "this test group may no longer manage to induce a\n" + "reallocation of the syntax error message buffer.\n" + "This test group must be adjusted to produce a longer\n" + "error message.\n"); + YYABORT; + } +} +; + +// Induce a syntax error message whose total length is more than +// sizeof yymsgbuf in yyparse. Each token here is 64 bytes. +syntax_error: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| error 'a' 'b' 'c' +; + +%% + +]AT_YYERROR_DEFINE[ +/* Induce two syntax error messages (which requires full error + recovery by shifting 3 tokens) in order to detect any loss of the + reallocated buffer. */ +]AT_YYLEX_DEFINE(["abc"])[ +int +main (void) +{ + return yyparse (); +} +]]) +AT_BISON_OPTION_POPDEFS + +AT_BISON_CHECK([[-o input.c input.y]]) +AT_COMPILE([[input]]) +AT_PARSER_CHECK([[./input]], [[1]], [], +[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B +syntax error, unexpected $end, expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B +]]) + +AT_CLEANUP + + + +## ------------------------- ## +## %error-verbose overflow. ## +## ------------------------- ## + +# Imagine the case where YYSTACK_ALLOC_MAXIMUM = YYSIZE_MAXIMUM and an +# invocation of yysyntax_error has caused yymsg_alloc to grow to exactly +# YYSTACK_ALLOC_MAXIMUM (perhaps because the normal doubling of size had +# to be clipped to YYSTACK_ALLOC_MAXIMUM). In an old version of yacc.c, +# a subsequent invocation of yysyntax_error that overflows during its +# size calculation would return YYSIZE_MAXIMUM to yyparse. Then, +# yyparse would invoke yyerror using the old contents of yymsg. + +AT_SETUP([[%error-verbose overflow]]) +AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ + + /* This prevents this test case from having to induce error messages + large enough to overflow size_t. */ + #define YYSIZE_T unsigned char + + /* Bring in malloc and set EXIT_SUCCESS so yacc.c doesn't try to + provide a malloc prototype using our YYSIZE_T. */ + #include + #ifndef EXIT_SUCCESS + # define EXIT_SUCCESS 0 + #endif + + /* Max depth is usually much smaller than YYSTACK_ALLOC_MAXIMUM, and + we don't want gcc to warn everywhere this constant would be too big + to make sense for our YYSIZE_T. */ + #define YYMAXDEPTH 100 +} + +%error-verbose + +%% + +start: syntax_error1 check syntax_error2 ; + +// Induce a syntax error message whose total length causes yymsg in +// yyparse to be reallocated to size YYSTACK_ALLOC_MAXIMUM, which +// should be 255. Each token here is 64 bytes. +syntax_error1: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| "123456789112345678921234567893123456789412345678951234567896123C" +| error 'a' 'b' 'c' +; + +check: +{ + if (yymsg_alloc != YYSTACK_ALLOC_MAXIMUM + || YYSTACK_ALLOC_MAXIMUM != YYSIZE_MAXIMUM + || YYSIZE_MAXIMUM != 255) + { + fprintf (stderr, + "The assumptions of this test group are no longer\n" + "valid, so it may no longer catch the error it was\n" + "designed to catch. Specifically, the following\n" + "values should all be 255:\n\n"); + fprintf (stderr, " yymsg_alloc = %d\n", yymsg_alloc); + fprintf (stderr, " YYSTACK_ALLOC_MAXIMUM = %d\n", + YYSTACK_ALLOC_MAXIMUM); + fprintf (stderr, " YYSIZE_MAXIMUM = %d\n", YYSIZE_MAXIMUM); + YYABORT; + } +} +; + +// Now overflow. +syntax_error2: + "123456789112345678921234567893123456789412345678951234567896123A" +| "123456789112345678921234567893123456789412345678951234567896123B" +| "123456789112345678921234567893123456789412345678951234567896123C" +| "123456789112345678921234567893123456789412345678951234567896123D" +| "123456789112345678921234567893123456789412345678951234567896123E" +; + +%% + +]AT_YYERROR_DEFINE[ +/* Induce two syntax error messages (which requires full error + recovery by shifting 3 tokens). */ +]AT_YYLEX_DEFINE(["abc"])[ +int +main (void) +{ + /* Push parsers throw away the message buffer between tokens, so skip + this test under maintainer-push-check. */ + if (YYPUSH) + return 77; + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-o input.c input.y]]) + +# gcc warns about tautologies and fallacies involving comparisons for +# unsigned char. However, it doesn't produce these same warnings for +# size_t and many other types when the warnings would seem to make just +# as much sense. We ignore the warnings. +[CFLAGS="$NO_WERROR_CFLAGS"] +AT_COMPILE([[input]]) + +AT_PARSER_CHECK([[./input]], [[2]], [], +[[syntax error, unexpected 'a', expecting 123456789112345678921234567893123456789412345678951234567896123A or 123456789112345678921234567893123456789412345678951234567896123B or 123456789112345678921234567893123456789412345678951234567896123C +syntax error +memory exhausted +]]) +AT_BISON_OPTION_POPDEFS +AT_CLEANUP + + + +## ------------------------ ## +## LAC: Exploratory stack. ## +## ------------------------ ## + +AT_SETUP([[LAC: Exploratory stack]]) + +m4_pushdef([AT_LAC_CHECK], [ + +AT_BISON_OPTION_PUSHDEFS([$1]) + +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + int yylex (]AT_PURE_IF([[YYSTYPE *]], [[void]])[); +} + +]$1[ +%error-verbose +%token 'c' + +%% + +// default reductions in inconsistent states +// v v v v v v v v v v v v v v +S: A B A A B A A A A B A A A A A A A B C C A A A A A A A A A A A A B ; +// ^ ^ ^ +// LAC reallocs + +A: 'a' | /*empty*/ { printf ("inconsistent default reduction\n"); } ; +B: 'b' ; +C: /*empty*/ { printf ("consistent default reduction\n"); } ; + +%% +]AT_YYERROR_DEFINE[ +int +yylex (]AT_PURE_IF([[YYSTYPE *v]], [[void]])[) +{ + static char const *input = "bbbbc";]AT_PURE_IF([[ + *v = 0;]])[ + return *input++; +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \ + -Dparse.lac.memory-trace=full \ + -t -o input.c input.y]], [[0]], [], +[[input.y: conflicts: 21 shift/reduce +]]) +AT_COMPILE([[input]]) +AT_PARSER_CHECK([[./input > stdout.txt 2> stderr.txt]], [[1]]) + +# Make sure syntax error doesn't forget that 'a' is expected. It would +# be forgotten without lookahead correction. +AT_CHECK([[grep 'syntax error,' stderr.txt]], [[0]], +[[syntax error, unexpected 'c', expecting 'a' or 'b' +]]) + +# Check number of default reductions in inconsistent states to be sure +# syntax error is detected before unnecessary reductions are performed. +AT_CHECK([[perl -0777 -ne 'print s/inconsistent default reduction//g;' \ + < stdout.txt || exit 77]], [[0]], [[14]]) + +# Check number of default reductions in consistent states to be sure +# it is performed before the syntax error is detected. +AT_CHECK([[perl -0777 -ne 'print s/\bconsistent default reduction//g;' \ + < stdout.txt || exit 77]], [[0]], [[2]]) + +# Check number of reallocs to be sure reallocated memory isn't somehow +# lost between LAC invocations. +AT_CHECK([[perl -0777 -ne 'print s/\(realloc//g;' < stderr.txt \ + || exit 77]], [[0]], [[3]]) + +AT_BISON_OPTION_POPDEFS +]) + +AT_LAC_CHECK([[%define api.push-pull pull]]) +AT_LAC_CHECK([[%define api.push-pull pull %define api.pure]]) +AT_LAC_CHECK([[%define api.push-pull both]]) +AT_LAC_CHECK([[%define api.push-pull both %define api.pure]]) + +m4_popdef([AT_LAC_CHECK]) + +AT_CLEANUP + + + +## ------------------------ ## +## LAC: Memory exhaustion. ## +## ------------------------ ## + +AT_SETUP([[LAC: Memory exhaustion]]) + +m4_pushdef([AT_LAC_CHECK], +[AT_BISON_OPTION_PUSHDEFS +AT_DATA_GRAMMAR([input.y], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ + #define YYMAXDEPTH 8 +} + +%error-verbose + +%% + +S: A A A A A A A A A ; +A: /*empty*/ | 'a' ; + +%% +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE(["$1"])[ +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-Dparse.lac=full -Dparse.lac.es-capacity-initial=1 \ + -t -o input.c input.y]], [[0]], [], +[[input.y: conflicts: 8 shift/reduce +]]) +AT_COMPILE([[input]]) +AT_BISON_OPTION_POPDEFS +]) + +# Check for memory exhaustion during parsing. +AT_LAC_CHECK([]) +AT_PARSER_CHECK([[./input]], [[2]], [], +[[Starting parse +Entering state 0 +Reading a token: Now at end of input. +LAC: initial context established for $end +LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded) +memory exhausted +Cleanup: discarding lookahead token $end () +Stack now 0 +]]) + +# Induce an immediate syntax error with an undefined token, and check +# for memory exhaustion while building syntax error message. +AT_LAC_CHECK([z], [[0]]) +AT_PARSER_CHECK([[./input]], [[2]], [], +[[Starting parse +Entering state 0 +Reading a token: Next token is token $undefined () +LAC: initial context established for $undefined +LAC: checking lookahead $undefined: Always Err +Constructing syntax error message +LAC: checking lookahead $end: R2 G3 R2 G5 R2 G6 R2 G7 R2 G8 R2 G9 R2 G10 R2 G11 R2 (max size exceeded) +syntax error +memory exhausted +Cleanup: discarding lookahead token $undefined () +Stack now 0 +]]) + +m4_popdef([AT_LAC_CHECK]) + +AT_CLEANUP