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identifiers: dashes are letters.

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Dashes can now start identifiers (symbols and directives).

	* src/scan-gram.l ({letter}): Add dash.
	({id}): Remove it.
	* tests/input.at (Symbols): Adjust.
	Remove stray comment.
	* tests/regression.at (Invalid inputs): Adjust error message.
	* doc/bison.texinfo (Symbols): Update.
This commit is contained in:
Akim Demaille
2009-05-04 21:15:17 +02:00
parent 98a345a219
commit cdf3f11338
6 changed files with 33 additions and 18 deletions
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4
doc/bison.texinfo
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@@ -3050,8 +3050,8 @@ A @dfn{nonterminal symbol} stands for a class of syntactically
equivalent groupings. The symbol name is used in writing grammar rules.
By convention, it should be all lower case.
Symbol names can contain letters, underscores, period, and (not at the
beginning) digits and dashes. Dashes in symbol names are a GNU
Symbol names can contain letters, underscores, periods, dashes, and (not
at the beginning) digits. Dashes in symbol names are a GNU
extension, incompatible with @acronym{POSIX} Yacc. Terminal symbols
that contain periods or dashes make little sense: since they are not
valid symbols (in most programming languages) they are not exported as