[Issue 15112] !is not highlighted

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15112

Rainer Schuetze <r.sagitario at gmx.de> changed:

           What    |Removed                     |Added
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                 CC|                            |r.sagitario at gmx.de

--- Comment #1 from Rainer Schuetze <r.sagitario at gmx.de> ---
The problem here is that the lexer cannot determine whether "is" or "!is" are
operators or "is" is part of an is-expression.

In the dmd frontend, this is done by the parser by recombining tokens, you can
even write:

> if(ptr !    is null)

The Visual D lexer doesn't have that interaction with the parser (it used to
work with the original semantic analyzer) and considers "!is" an operator and
"is" a keyword.

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