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warnings: used but undeclared symbols are warnings

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We used to raise an error if a symbol appears only in a %printer or
%destructor.  Make it a warning.

* src/symtab.h (status): New enum.
(symbol): Replace the binary "declared" with the three-state "status".
Adjust dependencies.
* src/symtab.c (symbol_check_defined): Needed symbols are an error,
whereas "used" are simply warnings.
* src/symlist.c (symbol_list_destructor_set, symbol_list_printer): Set
symbol status to 'used' when associated to destructors or printers.
* input.at (Undeclared symbols used for a printer or destructor): New.
This commit is contained in:
Victor Santet
2012-06-19 16:14:55 +02:00
committed by Akim Demaille
parent dda2c1adba
commit b921d92fcb
6 changed files with 66 additions and 10 deletions
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2
src/reader.c
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@@ -333,7 +333,7 @@ grammar_rule_check (const symbol_list *r)
it for char literals and strings, which are always tokens. */
if (r->ruleprec
&& r->ruleprec->tag[0] != '\'' && r->ruleprec->tag[0] != '"'
&& !r->ruleprec->declared && !r->ruleprec->prec)
&& r->ruleprec->status != declared && !r->ruleprec->prec)
warn_at (r->location, _("token for %%prec is not defined: %s"),
r->ruleprec->tag);
}