# Bison Regressions. -*- Autotest -*- # Copyright 2001 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., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. AT_BANNER([[Regression tests.]]) ## ------------------ ## ## Duplicate string. ## ## ------------------ ## AT_SETUP([Duplicate string]) AT_DATA([input.y], [[/* `Bison -v' used to dump core when two tokens are defined with the same string, as LE and GE below. */ %token NUM %token LE "<=" %token GE "<=" %% exp: '(' exp ')' | NUM ; %% ]]) AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore) AT_CLEANUP ## ------------------------- ## ## Unresolved SR Conflicts. ## ## ------------------------- ## AT_SETUP([Unresolved SR Conflicts]) AT_DATA([input.y], [[%token NUM OP %% exp: exp OP exp | NUM; ]]) AT_CHECK([bison input.y -o input.c -v], 0, [], [input.y contains 1 shift/reduce conflict. ]) # Check the contents of the report. AT_CHECK([cat input.output], [], [[State 4 contains 1 shift/reduce conflict. Grammar Number, Line, Rule 1 3 exp -> exp OP exp 2 3 exp -> NUM Terminals, with rules where they appear $ (-1) error (256) NUM (257) 2 OP (258) 1 Nonterminals, with rules where they appear exp (5) on left: 1 2, on right: 1 state 0 NUM shift, and go to state 1 exp go to state 2 state 1 exp -> NUM . (rule 2) $default reduce using rule 2 (exp) state 2 exp -> exp . OP exp (rule 1) $ shift, and go to state 5 OP shift, and go to state 3 state 3 exp -> exp OP . exp (rule 1) NUM shift, and go to state 1 exp go to state 4 state 4 exp -> exp . OP exp (rule 1) exp -> exp OP exp . (rule 1) OP shift, and go to state 3 OP [reduce using rule 1 (exp)] $default reduce using rule 1 (exp) state 5 $ shift, and go to state 6 state 6 $default accept ]]) AT_CLEANUP ## --------------------- ## ## Solved SR Conflicts. ## ## --------------------- ## AT_SETUP([Solved SR Conflicts]) AT_DATA([input.y], [[%token NUM OP %right OP %% exp: exp OP exp | NUM; ]]) AT_CHECK([bison input.y -o input.c -v], 0, [], []) # Check the contents of the report. AT_CHECK([cat input.output], [], [[Conflict in state 4 between rule 1 and token OP resolved as shift. Grammar Number, Line, Rule 1 4 exp -> exp OP exp 2 4 exp -> NUM Terminals, with rules where they appear $ (-1) error (256) NUM (257) 2 OP (258) 1 Nonterminals, with rules where they appear exp (5) on left: 1 2, on right: 1 state 0 NUM shift, and go to state 1 exp go to state 2 state 1 exp -> NUM . (rule 2) $default reduce using rule 2 (exp) state 2 exp -> exp . OP exp (rule 1) $ shift, and go to state 5 OP shift, and go to state 3 state 3 exp -> exp OP . exp (rule 1) NUM shift, and go to state 1 exp go to state 4 state 4 exp -> exp . OP exp (rule 1) exp -> exp OP exp . (rule 1) OP shift, and go to state 3 $default reduce using rule 1 (exp) state 5 $ shift, and go to state 6 state 6 $default accept ]]) AT_CLEANUP ## ------------------- ## ## Rule Line Numbers. ## ## ------------------- ## AT_SETUP([Rule Line Numbers]) AT_DATA([input.y], [[%% expr: 'a' { } 'b' { } | { } 'c' { } ]]) AT_CHECK([bison input.y -o input.c -v], 0, [], []) # Check the contents of the report. AT_CHECK([cat input.output], [], [[Grammar Number, Line, Rule 1 2 @1 -> /* empty */ 2 2 expr -> 'a' @1 'b' 3 15 @2 -> /* empty */ 4 15 expr -> @2 'c' Terminals, with rules where they appear $ (-1) 'a' (97) 2 'b' (98) 2 'c' (99) 4 error (256) Nonterminals, with rules where they appear expr (6) on left: 2 4 @1 (7) on left: 1, on right: 2 @2 (8) on left: 3, on right: 4 state 0 'a' shift, and go to state 1 $default reduce using rule 3 (@2) expr go to state 6 @2 go to state 2 state 1 expr -> 'a' . @1 'b' (rule 2) $default reduce using rule 1 (@1) @1 go to state 3 state 2 expr -> @2 . 'c' (rule 4) 'c' shift, and go to state 4 state 3 expr -> 'a' @1 . 'b' (rule 2) 'b' shift, and go to state 5 state 4 expr -> @2 'c' . (rule 4) $default reduce using rule 4 (expr) state 5 expr -> 'a' @1 'b' . (rule 2) $default reduce using rule 2 (expr) state 6 $ shift, and go to state 7 state 7 $default accept ]]) AT_CLEANUP ## -------------------- ## ## %expect not enough. ## ## -------------------- ## AT_SETUP([%expect not enough]) AT_DATA([input.y], [[%token NUM OP %expect 0 %% exp: exp OP exp | NUM; ]]) AT_CHECK([bison input.y -o input.c], 1, [], [input.y contains 1 shift/reduce conflict. expected 0 shift/reduce conflicts ]) AT_CLEANUP ## --------------- ## ## %expect right. ## ## --------------- ## AT_SETUP([%expect right]) AT_DATA([input.y], [[%token NUM OP %expect 1 %% exp: exp OP exp | NUM; ]]) AT_CHECK([bison input.y -o input.c], 0) AT_CLEANUP ## ------------------ ## ## %expect too much. ## ## ------------------ ## AT_SETUP([%expect too much]) AT_DATA([input.y], [[%token NUM OP %expect 2 %% exp: exp OP exp | NUM; ]]) AT_CHECK([bison input.y -o input.c], 1, [], [input.y contains 1 shift/reduce conflict. expected 2 shift/reduce conflicts ]) AT_CLEANUP ## ---------------------- ## ## Mixing %token styles. ## ## ---------------------- ## AT_SETUP([Mixing %token styles]) # Taken from the documentation. AT_DATA([input.y], [[%token OR "||" %token LE 134 "<=" %left OR "<=" %% exp: ; %% ]]) AT_CHECK([bison -v input.y -o input.c], 0, ignore, ignore) AT_CLEANUP ## ---------------------- ## ## %union and --defines. ## ## ---------------------- ## AT_SETUP([%union and --defines]) AT_DATA([input.y], [%union { int integer; char *string ; } %% exp: {}; ]) AT_CHECK([bison --defines input.y]) AT_CLEANUP ## --------------------------------------- ## ## Duplicate '/' in C comments in %union ## ## --------------------------------------- ## AT_SETUP([%union and C comments]) AT_DATA([input.y], [%union { /* The int. */ int integer; /* The string. */ char *string ; } %% exp: {}; ]) AT_CHECK([bison input.y -o input.c]) AT_CHECK([fgrep '//*' input.c], [1], []) AT_CLEANUP ## ----------------- ## ## Invalid input 1. ## ## ----------------- ## AT_SETUP([Invalid input: 1]) AT_DATA([input.y], [[%% ? ]]) AT_CHECK([bison input.y], [1], [], [[input.y:2: invalid input: `?' input.y:3: fatal error: no rules in the input grammar ]]) AT_CLEANUP ## ----------------- ## ## Invalid input 2. ## ## ----------------- ## AT_SETUP([Invalid input: 2]) AT_DATA([input.y], [[%% default: 'a' } ]]) AT_CHECK([bison input.y], [1], [], [[input.y:2: invalid input: `}' ]]) AT_CLEANUP ## -------------------- ## ## Invalid %directive. ## ## -------------------- ## AT_SETUP([Invalid %directive]) AT_DATA([input.y], [[%invalid ]]) 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_CLEANUP ## --------------------- ## ## Invalid CPP headers. ## ## --------------------- ## # AT_TEST_CPP_GUARD_H([INPUT-FILE-BASE) # ------------------------------------- m4_define([AT_TEST_CPP_GUARD_H], [AT_SETUP([Invalid CPP guards: $1]) # Possibly create inner directories. dirname=`AS_DIRNAME([$1])` AS_MKDIR_P([$dirname]) AT_DATA([$1.y], [%% dummy: ]) AT_CHECK([bison --defines=$1.h $1.y]) # CPP should be happy with it. AT_CHECK([$CC -E $1.h], 0, [ignore]) AT_CLEANUP ]) AT_TEST_CPP_GUARD_H([input/input]) AT_TEST_CPP_GUARD_H([9foo]) ## -------------- ## ## Web2c Report. ## ## -------------- ## # The generation of the reduction was once wrong in Bison, and made it # miss some reductions. In the following test case, the reduction on # `undef_id_tok' in state 1 was missing. This is stripped down from # the actual web2c.y. AT_SETUP([Web2c Report]) AT_DATA([input.y], [[%token undef_id_tok const_id_tok %start CONST_DEC_PART %% CONST_DEC_PART: CONST_DEC_LIST ; CONST_DEC_LIST: CONST_DEC | CONST_DEC_LIST CONST_DEC ; CONST_DEC: { } undef_id_tok '=' const_id_tok ';' ; %% ]]) AT_CHECK([bison -v input.y]) AT_CHECK([sed -n 's/ *$//;/^$/!p' input.output], 0, [[Grammar Number, Line, Rule 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 ';' Terminals, with rules where they appear $ (-1) ';' (59) 5 '=' (61) 5 error (256) undef_id_tok (257) 5 const_id_tok (258) 5 Nonterminals, with rules where they appear CONST_DEC_PART (7) on left: 1 CONST_DEC_LIST (8) on left: 2 3, on right: 1 3 CONST_DEC (9) on left: 5, on right: 2 3 @1 (10) on left: 4, on right: 5 state 0 $default reduce using rule 4 (@1) CONST_DEC_PART go to state 9 CONST_DEC_LIST go to state 1 CONST_DEC go to state 2 @1 go to state 3 state 1 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 4 @1 go to state 3 state 2 CONST_DEC_LIST -> CONST_DEC . (rule 2) $default reduce using rule 2 (CONST_DEC_LIST) state 3 CONST_DEC -> @1 . undef_id_tok '=' const_id_tok ';' (rule 5) undef_id_tok shift, and go to state 5 state 4 CONST_DEC_LIST -> CONST_DEC_LIST CONST_DEC . (rule 3) $default reduce using rule 3 (CONST_DEC_LIST) state 5 CONST_DEC -> @1 undef_id_tok . '=' const_id_tok ';' (rule 5) '=' shift, and go to state 6 state 6 CONST_DEC -> @1 undef_id_tok '=' . const_id_tok ';' (rule 5) const_id_tok shift, and go to state 7 state 7 CONST_DEC -> @1 undef_id_tok '=' const_id_tok . ';' (rule 5) ';' shift, and go to state 8 state 8 CONST_DEC -> @1 undef_id_tok '=' const_id_tok ';' . (rule 5) $default reduce using rule 5 (CONST_DEC) state 9 $ shift, and go to state 10 state 10 $default accept ]]) AT_CLEANUP ## --------------- ## ## Web2c Actions. ## ## --------------- ## # The generation of the mapping `state -> action' was once wrong in # extremely specific situations. web2c.y exhibits this situation. # Below is a stripped version of the grammar. It looks like one can # simplify it further, but just don't: it is tuned to exhibit a bug, # which disapears when applying sane grammar transformations. # # It used to be wrong on yydefact only: # # static const short yydefact[] = # { # - 2, 0, 1, 0, 0, 2, 3, 2, 5, 4, # + 2, 0, 1, 0, 0, 0, 3, 2, 5, 4, # 0, 0 # }; # # but let's check all the tables. AT_SETUP([Web2c Actions]) AT_DATA([input.y], [[%% statement: struct_stat; struct_stat: /* empty. */ | if else; if: "if" "const" "then" statement; else: "else" statement; %% ]]) AT_CHECK([bison -v input.y -o input.c]) # Check only the tables. We don't use --no-parser, because it is # still to be implemented in the experimental branch of Bison. AT_CHECK([[sed -n 's/ *$//;/^static const.*\[\] =/,/^}/p' input.c]], 0, [[static const char yytranslate[] = { 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 3, 4, 5, 6 }; static const short yyprhs[] = { 0, 0, 2, 3, 6, 11 }; static const short yyrhs[] = { 8, 0, 0, 9, 10, 0, 3, 4, 5, 7, 0, 6, 7, 0 }; static const short yyrline[] = { 0, 2, 3, 3, 4, 5 }; static const char *const yytname[] = { "$", "error", "$undefined.", "\"if\"", "\"const\"", "\"then\"", "\"else\"", "statement", "struct_stat", "if", "else", NULL }; static const short yytoknum[] = { 0, 256, 2, 257, 258, 259, 260, -1 }; static const short yyr1[] = { 0, 7, 8, 8, 9, 10 }; static const short yyr2[] = { 0, 1, 0, 2, 4, 2 }; static const short yydefact[] = { 2, 0, 1, 0, 0, 2, 3, 2, 5, 4, 0, 0 }; static const short yydefgoto[] = { 8, 2, 3, 6 }; static const short yypact[] = { -2, -1,-32768, -4, 1, -2,-32768, -2,-32768,-32768, 4,-32768 }; static const short yypgoto[] = { 0,-32768,-32768,-32768 }; static const short yytable[] = { 10, 1, 5, 4, 11, 0, 7, 9 }; static const short yycheck[] = { 0, 3, 6, 4, 0, -1, 5, 7 }; ]]) AT_CLEANUP