X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b7226022b07fac385defbf2297892d8c3dc3cd18..b8a8cc42c6cf43c1a66b8efdcde2a2791c99d93a:/tests/conflicts.at diff --git a/tests/conflicts.at b/tests/conflicts.at index 3934a6cf..c7ed2fe4 100644 --- a/tests/conflicts.at +++ b/tests/conflicts.at @@ -1,7 +1,6 @@ # Exercising Bison on conflicts. -*- Autotest -*- -# Copyright (C) 2002-2005, 2007, 2009-2012 Free Software Foundation, -# Inc. +# Copyright (C) 2002-2005, 2007-2012 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 @@ -38,7 +37,13 @@ e: 'e' | /* Nothing. */; ]]) AT_BISON_CHECK([-o input.c input.y], 0, [], -[[input.y:4.9: warning: rule useless in parser due to conflicts: e: /* empty */ +[[input.y:4.9: warning: rule useless in parser due to conflicts: e: /* empty */ [-Wother] +]]) + +AT_BISON_CHECK([-fcaret -o input.c input.y], 0, [], +[[input.y:4.9: warning: rule useless in parser due to conflicts [-Wother] + e: 'e' | /* Nothing. */; + ^ ]]) AT_CLEANUP @@ -118,10 +123,10 @@ AT_NONASSOC_AND_EOF_CHECK([], [[incorrect]]) # We must disable default reductions in inconsistent states in order to # have an explicit list of all expected tokens. -AT_NONASSOC_AND_EOF_CHECK([[-Dlr.default-reductions=consistent]], +AT_NONASSOC_AND_EOF_CHECK([[-Dlr.default-reduction=consistent]], [[correct]]) -# lr.default-reductions=consistent happens to work for this test case. +# lr.default-reduction=consistent happens to work for this test case. # However, for other grammars, lookahead sets can be merged for # different left contexts, so it is still possible to have an incorrect # expected list. Canonical LR is almost a general solution (that is, it @@ -142,11 +147,11 @@ AT_CLEANUP -## -------------------------------------- ## -## %error-verbose and consistent errors. ## -## -------------------------------------- ## +## ------------------------------------------- ## +## parse.error=verbose and consistent errors. ## +## ------------------------------------------- ## -AT_SETUP([[%error-verbose and consistent errors]]) +AT_SETUP([[parse.error=verbose and consistent errors]]) m4_pushdef([AT_CONSISTENT_ERRORS_CHECK], [ @@ -164,7 +169,6 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y], }]], [[ %code {]AT_SKEL_CC_IF([[ - #include #include ]], [[ #include #include @@ -177,7 +181,7 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y], ]$1[ -%error-verbose +%define parse.error verbose %% @@ -312,12 +316,12 @@ AT_CONSISTENT_ERRORS_CHECK([[%define lr.type ielr # Even canonical LR doesn't foresee the error for 'a'! AT_CONSISTENT_ERRORS_CHECK([[%define lr.type ielr - %define lr.default-reductions consistent]], + %define lr.default-reduction consistent]], [AT_PREVIOUS_STATE_GRAMMAR], [AT_PREVIOUS_STATE_INPUT], [[$end]], [[ab]]) AT_CONSISTENT_ERRORS_CHECK([[%define lr.type ielr - %define lr.default-reductions accepting]], + %define lr.default-reduction accepting]], [AT_PREVIOUS_STATE_GRAMMAR], [AT_PREVIOUS_STATE_INPUT], [[$end]], [[ab]]) @@ -372,7 +376,7 @@ error-reduce: ; consistent-reduction: /*empty*/ { - assert (yychar == ]AT_SKEL_CC_IF([[yyempty_]], [[YYEMPTY]])[); + assert (yychar == YYEMPTY); yylval = 0; yychar = 'b'; } ; @@ -396,19 +400,15 @@ AT_CONSISTENT_ERRORS_CHECK([[%glr-parser]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [['b']], [[none]]) -AT_CONSISTENT_ERRORS_CHECK([[%language "c++"]], - [AT_USER_ACTION_GRAMMAR], - [AT_USER_ACTION_INPUT], - [['b']], [[none]]) -# No Java test because yychar cannot be manipulated by users. +# No C++ or Java test because yychar cannot be manipulated by users. -AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reductions consistent]], +AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reduction consistent]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [['b']], [[none]]) # Canonical LR doesn't foresee the error for 'a'! -AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reductions accepting]], +AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reduction accepting]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [[$end]], [[a]]) @@ -422,7 +422,7 @@ AT_CONSISTENT_ERRORS_CHECK([[%define parse.lac full]], [AT_USER_ACTION_INPUT], [['b']], [[none]]) AT_CONSISTENT_ERRORS_CHECK([[%define parse.lac full - %define lr.default-reductions accepting]], + %define lr.default-reduction accepting]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [[$end]], [[none]]) @@ -504,7 +504,7 @@ AT_BISON_OPTION_POPDEFS # Show canonical LR's failure. AT_BISON_CHECK([[-Dlr.type=canonical-lr -o input.c input.y]], [[0]], [[]], -[[input.y: conflicts: 2 shift/reduce +[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] ]]) AT_COMPILE([[input]]) AT_PARSER_CHECK([[./input]], [[1]], [[]], @@ -514,7 +514,7 @@ AT_PARSER_CHECK([[./input]], [[1]], [[]], # It's corrected by LAC. AT_BISON_CHECK([[-Dlr.type=canonical-lr -Dparse.lac=full \ -o input.c input.y]], [[0]], [[]], -[[input.y: conflicts: 2 shift/reduce +[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] ]]) AT_COMPILE([[input]]) AT_PARSER_CHECK([[./input]], [[1]], [[]], @@ -524,7 +524,7 @@ AT_PARSER_CHECK([[./input]], [[1]], [[]], # IELR is sufficient when LAC is used. AT_BISON_CHECK([[-Dlr.type=ielr -Dparse.lac=full -o input.c input.y]], [[0]], [[]], -[[input.y: conflicts: 2 shift/reduce +[[input.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] ]]) AT_COMPILE([[input]]) AT_PARSER_CHECK([[./input]], [[1]], [[]], @@ -548,8 +548,8 @@ exp: exp OP exp | NUM; ]]) AT_BISON_CHECK([-o input.c --report=all input.y], 0, [], -[input.y: conflicts: 1 shift/reduce -]) +[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] +]]) # Check the contents of the report. AT_CHECK([cat input.output], [], @@ -580,7 +580,7 @@ exp (6) on left: 1 2, on right: 0 1 -state 0 +State 0 0 $accept: . exp $end 1 exp: . exp OP exp @@ -591,14 +591,14 @@ state 0 exp go to state 2 -state 1 +State 1 2 exp: NUM . $default reduce using rule 2 (exp) -state 2 +State 2 0 $accept: exp . $end 1 exp: exp . OP exp @@ -607,14 +607,14 @@ state 2 OP shift, and go to state 4 -state 3 +State 3 0 $accept: exp $end . $default accept -state 4 +State 4 1 exp: . exp OP exp 1 | exp OP . exp @@ -625,7 +625,7 @@ state 4 exp go to state 5 -state 5 +State 5 1 exp: exp . OP exp 1 | exp OP exp . [$end, OP] @@ -683,7 +683,7 @@ exp (6) on left: 1 2, on right: 0 1 -state 0 +State 0 0 $accept: . exp $end 1 exp: . exp OP exp @@ -694,14 +694,14 @@ state 0 exp go to state 2 -state 1 +State 1 2 exp: NUM . $default reduce using rule 2 (exp) -state 2 +State 2 0 $accept: exp . $end 1 exp: exp . OP exp @@ -710,14 +710,14 @@ state 2 OP shift, and go to state 4 -state 3 +State 3 0 $accept: exp $end . $default accept -state 4 +State 4 1 exp: . exp OP exp 1 | exp OP . exp @@ -728,7 +728,7 @@ state 4 exp go to state 5 -state 5 +State 5 1 exp: exp . OP exp 1 | exp OP exp . [$end, OP] @@ -741,6 +741,62 @@ state 5 AT_CLEANUP +## ---------------------- ## +## %precedence suffices. ## +## ---------------------- ## + +AT_SETUP([%precedence suffices]) + +AT_DATA([input.y], +[[%precedence "then" +%precedence "else" +%% +stmt: + "if" cond "then" stmt +| "if" cond "then" stmt "else" stmt +| "stmt" +; + +cond: + "exp" +; +]]) + +AT_BISON_CHECK([-o input.c input.y]) + +AT_CLEANUP + + +## ------------------------------ ## +## %precedence does not suffice. ## +## ------------------------------ ## + +AT_SETUP([%precedence does not suffice]) + +AT_DATA([input.y], +[[%precedence "then" +%precedence "else" +%% +stmt: + "if" cond "then" stmt +| "if" cond "then" stmt "else" stmt +| "stmt" +; + +cond: + "exp" +| cond "then" cond +; +]]) + +AT_BISON_CHECK([-o input.c input.y], 0, [], +[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] +input.y:12.3-18: warning: rule useless in parser due to conflicts: cond: cond "then" cond [-Wother] +]]) + +AT_CLEANUP + + ## -------------------------------- ## ## Defaulted Conflicted Reduction. ## ## -------------------------------- ## @@ -778,8 +834,8 @@ id : '0'; ]]) AT_BISON_CHECK([-o input.c --report=all input.y], 0, [], -[[input.y: conflicts: 1 reduce/reduce -input.y:4.6-8: warning: rule useless in parser due to conflicts: id: '0' +[[input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] +input.y:4.6-8: warning: rule useless in parser due to conflicts: id: '0' [-Wother] ]]) # Check the contents of the report. @@ -823,7 +879,7 @@ id (7) on left: 4, on right: 2 -state 0 +State 0 0 $accept: . exp $end 1 exp: . num @@ -838,7 +894,7 @@ state 0 id go to state 4 -state 1 +State 1 3 num: '0' . [$end] 4 id: '0' . [$end] @@ -848,28 +904,28 @@ state 1 $default reduce using rule 3 (num) -state 2 +State 2 0 $accept: exp . $end $end shift, and go to state 5 -state 3 +State 3 1 exp: num . $default reduce using rule 1 (exp) -state 4 +State 4 2 exp: id . $default reduce using rule 2 (exp) -state 5 +State 5 0 $accept: exp $end . @@ -895,9 +951,8 @@ exp: exp OP exp | NUM; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 shift/reduce -input.y: error: expected 0 shift/reduce conflicts -]) +[[input.y: error: shift/reduce conflicts: 1 found, 0 expected +]]) AT_CLEANUP @@ -932,9 +987,8 @@ exp: exp OP exp | NUM; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 shift/reduce -input.y: error: expected 2 shift/reduce conflicts -]) +[[input.y: error: shift/reduce conflicts: 1 found, 2 expected +]]) AT_CLEANUP @@ -952,9 +1006,8 @@ a: 'a'; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 reduce/reduce -input.y: error: expected 0 reduce/reduce conflicts -]) +[[input.y: error: reduce/reduce conflicts: 1 found, 0 expected +]]) AT_CLEANUP @@ -996,7 +1049,7 @@ e: e '+' e ]]) AT_BISON_CHECK([-o input.c input.y], 0, [], -[[input.y: conflicts: 4 shift/reduce +[[input.y: warning: 4 shift/reduce conflicts [-Wconflicts-sr] ]]) AT_CLEANUP @@ -1098,14 +1151,15 @@ reported_conflicts: ]]) AT_BISON_CHECK([[--report=all input.y]], 0, [], -[[input.y: conflicts: 1 shift/reduce, 1 reduce/reduce -input.y:12.5-20: warning: rule useless in parser due to conflicts: resolved_conflict: 'a' unreachable1 -input.y:20.5-20: warning: rule useless in parser due to conflicts: unreachable1: 'a' unreachable2 -input.y:21.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */ -input.y:25.13: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ -input.y:25.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ -input.y:31.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a' -input.y:32.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */ +[[input.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] +input.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] +input.y:12.5-20: warning: rule useless in parser due to conflicts: resolved_conflict: 'a' unreachable1 [-Wother] +input.y:20.5-20: warning: rule useless in parser due to conflicts: unreachable1: 'a' unreachable2 [-Wother] +input.y:21.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */ [-Wother] +input.y:25.13: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ [-Wother] +input.y:25.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ [-Wother] +input.y:31.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a' [-Wother] +input.y:32.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */ [-Wother] ]]) AT_CHECK([[cat input.output]], 0, @@ -1170,7 +1224,7 @@ reported_conflicts (9) on left: 8 9 10, on right: 1 -state 0 +State 0 0 $accept: . start $end 1 start: . resolved_conflict 'a' reported_conflicts 'a' @@ -1185,28 +1239,28 @@ state 0 Conflict between rule 3 and token 'a' resolved as reduce (%left 'a'). -state 1 +State 1 0 $accept: start . $end $end shift, and go to state 3 -state 2 +State 2 1 start: resolved_conflict . 'a' reported_conflicts 'a' 'a' shift, and go to state 4 -state 3 +State 3 0 $accept: start $end . $default accept -state 4 +State 4 1 start: resolved_conflict 'a' . reported_conflicts 'a' 8 reported_conflicts: . 'a' @@ -1220,7 +1274,7 @@ state 4 reported_conflicts go to state 6 -state 5 +State 5 8 reported_conflicts: 'a' . ['a'] 9 | 'a' . ['a'] @@ -1230,14 +1284,14 @@ state 5 $default reduce using rule 8 (reported_conflicts) -state 6 +State 6 1 start: resolved_conflict 'a' reported_conflicts . 'a' 'a' shift, and go to state 7 -state 7 +State 7 1 start: resolved_conflict 'a' reported_conflicts 'a' . @@ -1245,16 +1299,17 @@ state 7 ]]) AT_DATA([[input-keep.y]], -[[%define lr.keep-unreachable-states +[[%define lr.keep-unreachable-state ]]) AT_CHECK([[cat input.y >> input-keep.y]]) AT_BISON_CHECK([[input-keep.y]], 0, [], -[[input-keep.y: conflicts: 2 shift/reduce, 2 reduce/reduce -input-keep.y:22.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */ -input-keep.y:26.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ -input-keep.y:32.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a' -input-keep.y:33.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */ +[[input-keep.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] +input-keep.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr] +input-keep.y:22.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */ [-Wother] +input-keep.y:26.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ [-Wother] +input-keep.y:32.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a' [-Wother] +input-keep.y:33.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */ [-Wother] ]]) AT_CLEANUP @@ -1291,8 +1346,8 @@ empty_c2: %prec 'c' ; empty_c3: %prec 'd' ; ]]) AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore]) -AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, -[[state 0 +AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0, +[[State 0 0 $accept: . start $end 1 start: . 'a' @@ -1328,7 +1383,7 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, Conflict between rule 13 and token 'c' resolved as reduce ('c' < 'd'). -state 1 +State 1 ]]) AT_CLEANUP @@ -1367,8 +1422,8 @@ empty_c3: %prec 'c' ; ]]) AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore]) -AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, -[[state 0 +AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0, +[[State 0 0 $accept: . start $end 1 start: . 'a' @@ -1404,14 +1459,45 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, Conflict between rule 11 and token 'c' resolved as an error (%nonassoc 'c'). -state 1 +State 1 ]]) AT_CLEANUP -## --------------------------------- ## -## -W versus %expect and %expect-rr ## -## --------------------------------- ## +## -------------------- ## +## %expect-rr non GLR. ## +## -------------------- ## + +AT_SETUP([[%expect-rr non GLR]]) + +AT_DATA([[1.y]], +[[%expect-rr 0 +%% +exp: 'a' +]]) + +AT_BISON_CHECK([[1.y]], [[0]], [], +[[1.y: warning: %expect-rr applies only to GLR parsers [-Wother] +]]) + +AT_DATA([[2.y]], +[[%expect-rr 1 +%% +exp: 'a' | 'a'; +]]) + +AT_BISON_CHECK([[2.y]], [[0]], [], +[[2.y: warning: %expect-rr applies only to GLR parsers [-Wother] +2.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] +2.y:3.12-14: warning: rule useless in parser due to conflicts: exp: 'a' [-Wother] +]]) + +AT_CLEANUP + + +## ---------------------------------- ## +## -W versus %expect and %expect-rr. ## +## ---------------------------------- ## AT_SETUP([[-W versus %expect and %expect-rr]]) @@ -1437,17 +1523,27 @@ B: ; ]]) AT_BISON_CHECK([[sr-rr.y]], [[0]], [[]], -[[sr-rr.y: conflicts: 1 shift/reduce, 1 reduce/reduce +[[sr-rr.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] +sr-rr.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] ]]) AT_BISON_CHECK([[-Wno-conflicts-sr sr-rr.y]], [[0]], [[]], -[[sr-rr.y: conflicts: 1 reduce/reduce +[[sr-rr.y: warning: 1 reduce/reduce conflict [-Wconflicts-rr] ]]) AT_BISON_CHECK([[-Wno-conflicts-rr sr-rr.y]], [[0]], [[]], -[[sr-rr.y: conflicts: 1 shift/reduce +[[sr-rr.y: warning: 1 shift/reduce conflict [-Wconflicts-sr] ]]) -[for gram in sr-rr sr rr; do +[ +# This is piece of code is rather complex for a simple task: try every +# combinaison of (0 or 1 real SR) x (0 or 1 real RR) x (don't %expect +# or %expect 0, 1, or 2 SR) x (don't %expect-rr or %expect-rr 0, 1, or 2 +# RR). + +# Number and types of genuine conflicts in the grammar. +for gram in sr-rr sr rr; do + # Number of expected s/r conflicts. for sr_exp_i in '' 0 1 2; do + # Number of expected r/r conflicts. for rr_exp_i in '' 0 1 2; do test -z "$sr_exp_i" && test -z "$rr_exp_i" && continue @@ -1470,36 +1566,38 @@ AT_BISON_CHECK([[-Wno-conflicts-rr sr-rr.y]], [[0]], [[]], echo "$directives" > $file cat $gram.y >> $file - # Count actual conflicts. - conflicts= - sr_count=0 - rr_count=0 - if test $gram = sr || test $gram = sr-rr; then - conflicts="1 shift/reduce" - sr_count=1 - fi - if test $gram = rr || test $gram = sr-rr; then - if test -n "$conflicts"; then - conflicts="$conflicts, " - fi - conflicts="${conflicts}1 reduce/reduce" - rr_count=1 - fi + # Number of found conflicts. + case $gram in + (sr) sr_count=1; rr_count=0;; + (rr) sr_count=0; rr_count=1;; + (sr-rr) sr_count=1; rr_count=1;; + esac + + # Update number of expected conflicts: if %expect is given then + # %expect-rr defaults to 0, and vice-versa. Leave empty if + # nothing expected. + case $sr_exp_i:$rr_exp_i in + ?:) rr_exp_i=0;; + :?) sr_exp_i=0;; + esac # Run tests. if test $sr_count -eq $sr_exp && test $rr_count -eq $rr_exp; then ]AT_BISON_CHECK([[-Wnone $file]])[ ]AT_BISON_CHECK([[-Werror $file]])[ else - echo "$file: conflicts: $conflicts" > experr - if test $sr_count -ne $sr_exp; then - if test $sr_exp -ne 1; then s=s; else s= ; fi - echo "$file: error: expected $sr_exp shift/reduce conflict$s" >> experr - fi - if test $rr_count -ne $rr_exp; then - if test $rr_exp -ne 1; then s=s; else s= ; fi - echo "$file: error: expected $rr_exp reduce/reduce conflict$s" >> experr - fi + { + if test -z "$sr_exp_i" && test "$sr_count" -ne 0; then + echo "warning: $sr_count shift/reduce conflicts" + elif test "$sr_exp_i" -ne "$sr_count"; then + echo "error: shift/reduce conflicts: $sr_count found, $sr_exp_i expected" + fi + if test -z "$rr_exp_i" && test "$rr_count" -ne 0; then + echo "warning: $rr_count reduce/reduce conflicts" + elif test "$rr_exp_i" -ne "$rr_count"; then + echo "error: reduce/reduce conflicts: $rr_count found, $rr_exp_i expected" + fi + } | sed -e "s/^/$file: /" > experr ]AT_BISON_CHECK([[-Wnone $file]], [[1]], [[]], [[experr]])[ ]AT_BISON_CHECK([[-Werror $file]], [[1]], [[]], [[experr]])[ fi