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356 lines
5.6 KiB
Plaintext
356 lines
5.6 KiB
Plaintext
# Exercising Bison on counterexamples. -*- Autotest -*-
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# Copyright (C) 2020 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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AT_BANNER([[Counterexamples.]])
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## --------------------- ##
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## Simple Unifying S/R. ##
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## --------------------- ##
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AT_SETUP([Unifying S/R])
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AT_DATA([[input.y]],
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[[%token A B C
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%%
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s: a x | y c;
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a: A;
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c: C;
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x: B | B C;
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y: A | A B;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------- ##
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## Deep Unifying S/R. ##
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## ------------------- ##
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AT_SETUP([Deep Unifying S/R])
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AT_DATA([[input.y]],
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[[%token A B C
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%%
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s: ac | a bc;
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ac: A ac C | b;
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b: B | B b;
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a: A | A a;
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bc: B bc C | B C;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------------------------ ##
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## S/R Conflict with Nullable Symbols. ##
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## ------------------------------------ ##
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AT_SETUP([S/R Conflict with Nullable Symbols])
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AT_DATA([[input.y]],
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[[%token A B X Y
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%%
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s: ax by | A xby;
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ax: A x;
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x: %empty | X x;
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by: B y;
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y: %empty | Y y;
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xby: B | X xby Y;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ---------------------------- ##
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## Non-unifying Ambiguous S/R. ##
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## ---------------------------- ##
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AT_SETUP([Non-unifying Ambiguous S/R])
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AT_DATA([[input.y]],
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[[%token A B C D E
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%%
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g: s | x;
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s: A x E | A x D E;
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x: b cd | bc;
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b: B;
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cd: C D;
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bc: B C;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------------------ ##
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## Non-unifying Unambiguous S/R. ##
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## ------------------------------ ##
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AT_SETUP([Non-unifying Unambiguous S/R])
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AT_DATA([[input.y]],
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[[%token A B
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%%
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s: t | s t;
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t: x | y;
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x: A;
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y: A A B;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ----------------------- ##
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## S/R after first token. ##
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## ----------------------- ##
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AT_SETUP([S/R after first token])
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AT_DATA([[input.y]],
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[[%token A B X Y
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%%
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a: r t | s;
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r: b;
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b: B;
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t: A xx | A x xy;
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s: b A xx y;
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x: X;
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xx: X X;
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xy: X Y;
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y: Y;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ----------------------------- ##
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## Unifying R/R counterexample. ##
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## ----------------------------- ##
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AT_SETUP([Unifying R/R counterexample])
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AT_DATA([[input.y]],
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[[%token A
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%%
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a : A b ;
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b : A | b;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------------------- ##
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## Non-unifying R/R lr1 conflict. ##
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## ------------------------------- ##
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AT_SETUP([Non-unifying R/R lr1 conflict])
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AT_DATA([[input.y]],
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[[%token A B C D
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%%
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s: a A | B a C | b C | B b A;
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a: D;
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b: D;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------------------- ##
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## Non-unifying R/R lr2 conflict. ##
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## ------------------------------- ##
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AT_SETUP([Non-unifying R/R lr2 conflict])
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AT_DATA([[input.y]],
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[[%token H J K X
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%%
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s: a J;
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a: H i;
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i: X | i J K;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## -------------------- ##
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## Cex Search Prepend. ##
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## -------------------- ##
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# Tests prepend steps in uniying counterexample
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# graph search
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AT_SETUP([Cex Search Prepend])
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AT_DATA([[input.y]],
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[[%token N A B C D
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%%
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s: n | n C;
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n: N n D | N n C | N a B | N b;
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a: A;
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b: A B C | A B D;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------- ##
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## R/R cex with prec. ##
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## ------------------- ##
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# Tests that counterexamples containing rules using
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# precedence/associativity directives work.
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AT_SETUP([R/R cex with prec])
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AT_DATA([[input.y]],
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[[%left b
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%right c
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%%
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S: B C | C B;
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A : B | C | %empty;
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B : A b A;
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C : A c A;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------- ##
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## Null nonterminals. ##
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## ------------------- ##
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AT_SETUP([Null nonterminals])
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AT_DATA([[input.y]],
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[[%token A
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%%
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a : b d | c d ;
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b : ;
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c : ;
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d : a | c A | d;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## --------------------------- ##
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## Non-unifying Prefix Share. ##
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## --------------------------- ##
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AT_SETUP([Non-unifying Prefix Share])
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# Tests for a counterexample which should start its derivation
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# at a shared symbol rather than the start symbol.
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AT_DATA([[input.y]],
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[[%token H J
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%%
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s: a | a J;
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a: H i J J
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i: %empty | i J;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## -------------------- ##
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## Deep Null Unifying. ##
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## ---------------------##
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# Tests that nested nullable nonterminals
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# are derived correctly.
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AT_SETUP([Deep Null Unifying])
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AT_DATA([[input.y]],
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[[%token a d
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%%
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S: a A D | a A A D;
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A: B;
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B: C
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C: %empty
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D: d;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP
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## ------------------------ ##
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## Deep Null Non-unifying. ##
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## -------------------------##
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# Tests that expand_to_conflict works with nullable sybols
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AT_SETUP([Deep Null Non-unifying])
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AT_DATA([[input.y]],
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[[%token a d e
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%%
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S: a A D | a A A D e;
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A: B;
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B: C
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C: %empty
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D: d;
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]])
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AT_BISON_CHECK([-Wcounterexample input.y], 0, [],
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[[
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]])
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AT_CLEANUP |