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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 966aba6583
commit c046698e6e
6 changed files with 36 additions and 21 deletions
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10
doc/bison.texinfo
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@@ -3048,8 +3048,8 @@ 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
@@ -9008,7 +9008,7 @@ The first, inclusive, position of the range, and the first beyond.
@end deftypeivar
@deftypeop {Constructor} {Location} {} Location (Position @var{loc})
Create a @code{Location} denoting an empty range located at a given point.
Create a @code{Location} denoting an empty range located at a given point.
@end deftypeop
@deftypeop {Constructor} {Location} {} Location (Position @var{begin}, Position @var{end})
@@ -9222,12 +9222,12 @@ Return immediately from the parser, indicating success.
@end deffn
@deffn {Statement} {return YYERROR;}
Start error recovery without printing an error message.
Start error recovery without printing an error message.
@xref{Error Recovery}.
@end deffn
@deffn {Statement} {return YYFAIL;}
Print an error message and start error recovery.
Print an error message and start error recovery.
@xref{Error Recovery}.
@end deffn