X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/95361618dee181507d53f47de2dd50c667b84007..ab96bb245789d1c24a68d637d48ffab889be3152:/tests/conflicts.at diff --git a/tests/conflicts.at b/tests/conflicts.at index a46acc5a..0dea0f89 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, 2007-2014 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 @@ -18,6 +17,248 @@ AT_BANNER([[Conflicts.]]) +## ------------------------- ## +## Token declaration order. ## +## ------------------------- ## + +# This test checks that token are declared left to right when in a precedence +# statement. + +AT_SETUP([Token declaration order]) + +AT_BISON_OPTION_PUSHDEFS + +AT_DATA_GRAMMAR([[input.y]], +[[%code { + #include + ]AT_YYERROR_DECLARE[ + ]AT_YYLEX_DECLARE[ +} +%token A B C +%token D +%right E F G +%right H I +%right J +%left K +%left L M N +%nonassoc O P Q +%precedence R S T U +%precedence V W +%% +exp: A +%% +]AT_YYERROR_DEFINE[ +]AT_YYLEX_DEFINE[ +int main (void) +{ + assert (A < B); + assert (B < C); + assert (C < D); + assert (D < E); + assert (E < F); + assert (F < G); + assert (G < H); + assert (H < I); + assert (I < J); + assert (J < K); + assert (K < L); + assert (L < M); + assert (M < N); + assert (N < O); + assert (O < P); + assert (P < Q); + assert (Q < R); + assert (R < S); + assert (S < T); + assert (T < U); + assert (U < V); + assert (V < W); + return 0; +} +]]) + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input]) + +AT_PARSER_CHECK([./input]) + +AT_BISON_OPTION_POPDEFS + +AT_CLEANUP + + +## --------------------------------------------------- ## +## Token declaration order: literals vs. identifiers. ## +## --------------------------------------------------- ## + +# This test checks that when several tokens are declared by the same keyword, +# some of them defined as a character ('a'), others as simple textual reference +# (A), they are declared correctly left to right. +# Previously, the following test would declare the states in the order 'o' 'p' +# M N, instead of M N 'o' 'p'. + +AT_SETUP([Token declaration order: literals vs. identifiers]) + +AT_DATA_GRAMMAR([[input.y]], +[[%token 'a' 'b' C D +%token E F 'g' 'h' +%right 'i' 'j' K L +%right M N 'o' 'p' +%% +exp: 'a' + | 'b' + | C + | D + | E + | F + | 'g' + | 'h' + | 'i' + | 'j' + | K + | L + | M + | N + | 'o' + | 'p' +; +%% +]]) + +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 + + 0 $accept: . exp $end + 1 exp: . 'a' + 2 | . 'b' + 3 | . C + 4 | . D + 5 | . E + 6 | . F + 7 | . 'g' + 8 | . 'h' + 9 | . 'i' + 10 | . 'j' + 11 | . K + 12 | . L + 13 | . M + 14 | . N + 15 | . 'o' + 16 | . 'p' + + 'a' shift, and go to state 1 + 'b' shift, and go to state 2 + C shift, and go to state 3 + D shift, and go to state 4 + E shift, and go to state 5 + F shift, and go to state 6 + 'g' shift, and go to state 7 + 'h' shift, and go to state 8 + 'i' shift, and go to state 9 + 'j' shift, and go to state 10 + K shift, and go to state 11 + L shift, and go to state 12 + M shift, and go to state 13 + N shift, and go to state 14 + 'o' shift, and go to state 15 + 'p' shift, and go to state 16 + + exp go to state 17 + + +State 1 +]]) + +AT_CLEANUP + + +## ------------------------------- ## +## Useless associativity warning. ## +## ------------------------------- ## + +AT_SETUP([Useless associativity warning]) + +AT_DATA([[input.y]], +[[%token EQ "=" PL "+" ST "*" LP "(" +%nonassoc "=" +%left "+" +%left "*" +%precedence "(" +%% +stmt: + exp +| "var" "=" exp +; + +exp: + exp "+" exp +| exp "*" "num" +| "(" exp ")" +| "num" +; +]]) + +AT_BISON_CHECK([-Wprecedence input.y], 0, [], +[[input.y:2.1-9: warning: useless precedence and associativity for "=" [-Wprecedence] +input.y:4.1-5: warning: useless associativity for "*", use %precedence [-Wprecedence] +input.y:5.1-11: warning: useless precedence for "(" [-Wprecedence] +]]) + +AT_CLEANUP + + +## ---------------------------- ## +## Useless precedence warning. ## +## ---------------------------- ## + +AT_SETUP([Useless precedence warning]) + +AT_DATA([[input.y]], +[[%token A B U V W X Y Z +%precedence Z +%left X +%precedence Y +%left W +%right V +%nonassoc U +%% +a: b + | a U b + | f +; +b: c + | b V c +; +c: d + | c W d +; +d: A + | d X d + | d Y A +; +f: B + | f Z B +; +]]) + +AT_BISON_CHECK([-Wprecedence -fcaret -o input.c input.y], 0, [], +[[input.y:7.1-9: warning: useless precedence and associativity for U [-Wprecedence] + %nonassoc U + ^^^^^^^^^ +input.y:6.1-6: warning: useless precedence and associativity for V [-Wprecedence] + %right V + ^^^^^^ +input.y:5.1-5: warning: useless precedence and associativity for W [-Wprecedence] + %left W + ^^^^^ +input.y:2.1-11: warning: useless precedence for Z [-Wprecedence] + %precedence Z + ^^^^^^^^^^^ +]]) + +AT_CLEANUP + ## ---------------- ## ## S/R in initial. ## @@ -38,7 +279,13 @@ 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 [-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 +365,10 @@ 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 +389,11 @@ 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 +411,6 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y], }]], [[ %code {]AT_SKEL_CC_IF([[ - #include #include ]], [[ #include #include @@ -177,7 +423,7 @@ AT_SKEL_JAVA_IF([AT_DATA], [AT_DATA_GRAMMAR])([input.y], ]$1[ -%error-verbose +%define parse.error verbose %% @@ -217,30 +463,9 @@ public Object getLVal () /*-------. | main. | -`-------*/]AT_SKEL_JAVA_IF([[ - -class input -{ - public static void main (String args[]) throws IOException - { - YYParser p = new YYParser (); - p.parse (); - } -}]], [AT_SKEL_CC_IF([[ - -int -main (void) -{ - yy::parser parser; - return parser.parse (); -}]], [[ - -int -main (void) -{ - return yyparse (); -}]])])[ -]]) +`-------*/ +]AT_MAIN_DEFINE +]) AT_FULL_COMPILE([[input]]) @@ -312,12 +537,12 @@ AT_CONSISTENT_ERRORS_CHECK([[%define lr.type ielr # Even canonical LR doesn't foresee the error for 'a'! AT_CONSISTENT_ERRORS_CHECK([[%define lr.type ielr - %define lr.default-reductions consistent]], + %define lr.default-reduction consistent]], [AT_PREVIOUS_STATE_GRAMMAR], [AT_PREVIOUS_STATE_INPUT], [[$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], [[$end]], [[ab]]) @@ -372,7 +597,7 @@ error-reduce: ; consistent-reduction: /*empty*/ { - assert (yychar == ]AT_SKEL_CC_IF([[yyempty_]], [[YYEMPTY]])[); + assert (yychar == YYEMPTY); yylval = 0; yychar = 'b'; } ; @@ -396,19 +621,15 @@ AT_CONSISTENT_ERRORS_CHECK([[%glr-parser]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [['b']], [[none]]) -AT_CONSISTENT_ERRORS_CHECK([[%language "c++"]], - [AT_USER_ACTION_GRAMMAR], - [AT_USER_ACTION_INPUT], - [['b']], [[none]]) -# No Java test because yychar cannot be manipulated by users. +# No C++ or Java test because yychar cannot be manipulated by users. -AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reductions consistent]], +AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reduction consistent]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [['b']], [[none]]) # Canonical LR doesn't foresee the error for 'a'! -AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reductions accepting]], +AT_CONSISTENT_ERRORS_CHECK([[%define lr.default-reduction accepting]], [AT_USER_ACTION_GRAMMAR], [AT_USER_ACTION_INPUT], [[$end]], [[a]]) @@ -422,7 +643,7 @@ 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]]) @@ -492,19 +713,14 @@ reduce-nonassoc: %prec 'a'; %% ]AT_YYERROR_DEFINE[ ]AT_YYLEX_DEFINE(["aaa"])[ - -int -main (void) -{ - return yyparse (); -} -]]) +]AT_MAIN_DEFINE +]) 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 +730,7 @@ 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 +740,7 @@ 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 +764,8 @@ 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 +796,7 @@ 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 +807,14 @@ 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 +823,14 @@ state 2 OP shift, and go to state 4 -state 3 +State 3 0 $accept: exp $end . $default accept -state 4 +State 4 1 exp: . exp OP exp 1 | exp OP . exp @@ -625,7 +841,7 @@ state 4 exp go to state 5 -state 5 +State 5 1 exp: exp . OP exp 1 | exp OP exp . [$end, OP] @@ -683,7 +899,7 @@ 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 +910,14 @@ 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 +926,14 @@ state 2 OP shift, and go to state 4 -state 3 +State 3 0 $accept: exp $end . $default accept -state 4 +State 4 1 exp: . exp OP exp 1 | exp OP . exp @@ -728,7 +944,7 @@ state 4 exp go to state 5 -state 5 +State 5 1 exp: exp . OP exp 1 | exp OP exp . [$end, OP] @@ -741,6 +957,62 @@ 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 [-Wother] +]]) + +AT_CLEANUP + + ## -------------------------------- ## ## Defaulted Conflicted Reduction. ## ## -------------------------------- ## @@ -751,13 +1023,13 @@ AT_CLEANUP # $end reduce using rule 3 (num) # $end [reduce using rule 4 (id)] # -# But when `reduce 3' is the default action, we'd produce: +# But when 'reduce 3' is the default action, we'd produce: # # $end [reduce using rule 4 (id)] # $default reduce using rule 3 (num) # # In this precise case (a reduction is masked by the default -# reduction), we make the `reduce 3' explicit: +# reduction), we make the 'reduce 3' explicit: # # $end reduce using rule 3 (num) # $end [reduce using rule 4 (id)] @@ -778,8 +1050,8 @@ 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 [-Wother] ]]) # Check the contents of the report. @@ -823,7 +1095,7 @@ id (7) on left: 4, on right: 2 -state 0 +State 0 0 $accept: . exp $end 1 exp: . num @@ -838,7 +1110,7 @@ state 0 id go to state 4 -state 1 +State 1 3 num: '0' . [$end] 4 id: '0' . [$end] @@ -848,28 +1120,28 @@ 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 +1167,8 @@ exp: exp OP exp | NUM; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 shift/reduce -input.y: expected 0 shift/reduce conflicts -]) +[[input.y: error: shift/reduce conflicts: 1 found, 0 expected +]]) AT_CLEANUP @@ -932,9 +1203,8 @@ exp: exp OP exp | NUM; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 shift/reduce -input.y: expected 2 shift/reduce conflicts -]) +[[input.y: error: shift/reduce conflicts: 1 found, 2 expected +]]) AT_CLEANUP @@ -952,9 +1222,8 @@ a: 'a'; ]]) AT_BISON_CHECK([-o input.c input.y], 1, [], -[input.y: conflicts: 1 reduce/reduce -input.y: expected 0 reduce/reduce conflicts -]) +[[input.y: error: reduce/reduce conflicts: 1 found, 0 expected +]]) AT_CLEANUP @@ -995,8 +1264,10 @@ e: e '+' e ; ]]) -AT_BISON_CHECK([-o input.c input.y], 0, [], -[[input.y: conflicts: 4 shift/reduce +AT_BISON_CHECK([-Wall -o input.c input.y], 0, [], +[[input.y: warning: 4 shift/reduce conflicts [-Wconflicts-sr] +input.y:1.1-5: warning: useless precedence and associativity for '+' [-Wprecedence] +input.y:2.1-5: warning: useless precedence and associativity for '*' [-Wprecedence] ]]) AT_CLEANUP @@ -1098,14 +1369,15 @@ 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 [-Wother] +input.y:20.5-20: warning: rule useless in parser due to conflicts [-Wother] +input.y:21.4: warning: rule useless in parser due to conflicts [-Wother] +input.y:25.13: warning: rule useless in parser due to conflicts [-Wother] +input.y:25.16: warning: rule useless in parser due to conflicts [-Wother] +input.y:31.5-7: warning: rule useless in parser due to conflicts [-Wother] +input.y:32.4: warning: rule useless in parser due to conflicts [-Wother] ]]) AT_CHECK([[cat input.output]], 0, @@ -1114,13 +1386,13 @@ AT_CHECK([[cat input.output]], 0, 2 resolved_conflict: 'a' unreachable1 4 unreachable1: 'a' unreachable2 - 5 | /* empty */ + 5 | %empty - 6 unreachable2: /* empty */ - 7 | /* empty */ + 6 unreachable2: %empty + 7 | %empty 9 reported_conflicts: 'a' - 10 | /* empty */ + 10 | %empty State 4 conflicts: 1 shift/reduce @@ -1134,17 +1406,17 @@ Grammar 1 start: resolved_conflict 'a' reported_conflicts 'a' 2 resolved_conflict: 'a' unreachable1 - 3 | /* empty */ + 3 | %empty 4 unreachable1: 'a' unreachable2 - 5 | /* empty */ + 5 | %empty - 6 unreachable2: /* empty */ - 7 | /* empty */ + 6 unreachable2: %empty + 7 | %empty 8 reported_conflicts: 'a' 9 | 'a' - 10 | /* empty */ + 10 | %empty Terminals, with rules where they appear @@ -1170,12 +1442,12 @@ 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' 2 resolved_conflict: . 'a' unreachable1 - 3 | . ['a'] + 3 | . %empty ['a'] $default reduce using rule 3 (resolved_conflict) @@ -1185,33 +1457,33 @@ 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' 9 | . 'a' - 10 | . ['a'] + 10 | . %empty ['a'] 'a' shift, and go to state 5 @@ -1220,7 +1492,7 @@ state 4 reported_conflicts go to state 6 -state 5 +State 5 8 reported_conflicts: 'a' . ['a'] 9 | 'a' . ['a'] @@ -1230,14 +1502,14 @@ state 5 $default reduce using rule 8 (reported_conflicts) -state 6 +State 6 1 start: resolved_conflict 'a' reported_conflicts . 'a' 'a' shift, and go to state 7 -state 7 +State 7 1 start: resolved_conflict 'a' reported_conflicts 'a' . @@ -1245,16 +1517,17 @@ state 7 ]]) AT_DATA([[input-keep.y]], -[[%define lr.keep-unreachable-states +[[%define lr.keep-unreachable-state ]]) AT_CHECK([[cat input.y >> input-keep.y]]) AT_BISON_CHECK([[input-keep.y]], 0, [], -[[input-keep.y: conflicts: 2 shift/reduce, 2 reduce/reduce -input-keep.y:22.4: warning: rule useless in parser due to conflicts: unreachable1: /* empty */ -input-keep.y:26.16: warning: rule useless in parser due to conflicts: unreachable2: /* empty */ -input-keep.y:32.5-7: warning: rule useless in parser due to conflicts: reported_conflicts: 'a' -input-keep.y:33.4: warning: rule useless in parser due to conflicts: reported_conflicts: /* empty */ +[[input-keep.y: warning: 2 shift/reduce conflicts [-Wconflicts-sr] +input-keep.y: warning: 2 reduce/reduce conflicts [-Wconflicts-rr] +input-keep.y:22.4: warning: rule useless in parser due to conflicts [-Wother] +input-keep.y:26.16: warning: rule useless in parser due to conflicts [-Wother] +input-keep.y:32.5-7: warning: rule useless in parser due to conflicts [-Wother] +input-keep.y:33.4: warning: rule useless in parser due to conflicts [-Wother] ]]) AT_CLEANUP @@ -1291,8 +1564,8 @@ empty_c2: %prec 'c' ; empty_c3: %prec 'd' ; ]]) AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore]) -AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, -[[state 0 +AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0, +[[State 0 0 $accept: . start $end 1 start: . 'a' @@ -1303,11 +1576,11 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, 6 | . empty_c1 'c' 7 | . empty_c2 'c' 8 | . empty_c3 'c' - 9 empty_a: . ['a'] - 10 empty_b: . [] - 11 empty_c1: . [] - 12 empty_c2: . [] - 13 empty_c3: . ['c'] + 9 empty_a: . %empty ['a'] + 10 empty_b: . %empty [] + 11 empty_c1: . %empty [] + 12 empty_c2: . %empty [] + 13 empty_c3: . %empty ['c'] 'b' shift, and go to state 1 @@ -1328,7 +1601,7 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, Conflict between rule 13 and token 'c' resolved as reduce ('c' < 'd'). -state 1 +State 1 ]]) AT_CLEANUP @@ -1367,8 +1640,8 @@ empty_c3: %prec 'c' ; ]]) AT_BISON_CHECK([[--report=all -o input.c input.y]], 0, [], [ignore]) -AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, -[[state 0 +AT_CHECK([[cat input.output | sed -n '/^State 0$/,/^State 1$/p']], 0, +[[State 0 0 $accept: . start $end 1 start: . 'a' @@ -1379,11 +1652,11 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^state 1$/p']], 0, 6 | . empty_c1 'c' 7 | . empty_c2 'c' 8 | . empty_c3 'c' - 9 empty_a: . [] - 10 empty_b: . [] - 11 empty_c1: . [] - 12 empty_c2: . ['c'] - 13 empty_c3: . ['c'] + 9 empty_a: . %empty [] + 10 empty_b: . %empty [] + 11 empty_c1: . %empty [] + 12 empty_c2: . %empty ['c'] + 13 empty_c3: . %empty ['c'] 'a' error (nonassociative) 'b' error (nonassociative) @@ -1404,14 +1677,45 @@ AT_CHECK([[cat input.output | sed -n '/^state 0$/,/^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 [-Wother] +]]) + +AT_CLEANUP + + +## ---------------------------------- ## +## -W versus %expect and %expect-rr. ## +## ---------------------------------- ## AT_SETUP([[-W versus %expect and %expect-rr]]) @@ -1437,17 +1741,27 @@ 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 "$rr_exp_i" && continue @@ -1470,36 +1784,38 @@ AT_BISON_CHECK([[-Wno-conflicts-rr sr-rr.y]], [[0]], [[]], echo "$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: 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: 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