Trass3r wrote:
Am 02.04.2011, 10:11 Uhr, schrieb Rainer Schuetze <r.sagita...@gmx.de>:
Do we want to allow spaces and comments between these tokens?
- extern ( C ++ )
Well we would have to introduce C++ as a keyword just for that purpose.
Not worth it.
It does not have to be a keyword, but the parser can just verify there
are no spaces, if a lexer token keeps that information. But I agree, not
worth changing anything.
- @ Property (safe, trusted, disable, etc)
safe, trusted etc. aren't keywords.
dmd handles it as ('@' identifier) and that's exactly what the grammar
should be to support user-defined attributes in the future.
Although it is not the current behaviour, I think it would be cleaner if
the lexer would generate a token "Property" that always starts with '@'
and continues as an identifer. This would replace the current token "@",
simply moving the rule "Property: '@' Identifier" from the parser into
the lexer.
This still includes any user-defined attributes for future extensions.
I hope, we agree on !in and !is, as the current lexing introduces the
shown parsing problems. But !is needs to be added to the IsExpression
rules then.
