-Wuseless-action #8
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akimd
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* src/complain.h, src/complain.c: Add support for -Wuseless-action.
* tests/glr-regression.at, tests/java.at, tests/torture.at, * examples/c/lexcalc/parse.y, examples/c/reccalc/parse.y: here. * src/parse-gram.y: Likewise. Style changes.
In order for the useless chain productions to work properly, there should not be actions that make explicit the default behavior. * src/scan-code.l (strspacecmp, useless_default_action): New. (translate_action): Report useless actions. * src/reader.c (grammar_rule_check_and_complete): Don't trigger this warning when generating explicit actions for C++. * tests/actions.at (Useless default actions): New.
* doc/bison.texi, src/getargs.c, NEWS: here.
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@akimd: Was there a reason to not include this in one of the last releases? |
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Introduce
-Wuseless-actionto warn about rules with a useless{ $$ = $1; }action.