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tests: check token redeclaration

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* src/symtab.c (symbol_class_set): Report previous definitions when
redeclared.
* tests/input.at (Symbol redeclared): New.
This commit is contained in:
Akim Demaille
2019-09-06 17:47:16 +02:00
parent d3a86f7b20
commit 375eb71489
4 changed files with 58 additions and 6 deletions
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9
tests/regression.at
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@@ -397,19 +397,18 @@ AT_BISON_OPTION_POPDEFS
# unnecessarily escaped here even though it would need to be if encoded in a
# C-string literal. Also notice that unnecessary escaping, such as "\?", from
# the user specification is eliminated.
AT_BISON_CHECK([-o input.c input.y], [[0]], [[]],
[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
input.y:22.16-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
]])
AT_BISON_CHECK([-fcaret -o input.c input.y], [[0]], [[]],
[[input.y:22.8-14: warning: symbol SPECIAL redeclared [-Wother]
22 | %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
| ^~~~~~~
input.y:21.8-14: previous declaration
21 | %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
| ^~~~~~~
input.y:22.16-63: warning: symbol "\\'?\"\a\b\f\n\r\t\v\001\201\001\201??!" used more than once as a literal string [-Wother]
22 | %token SPECIAL "\\\'\?\"\a\b\f\n\r\t\v\001\201\x001\x000081??!"
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
]])
AT_COMPILE([input])
# Checking the error message here guarantees that yytname, which does contain