[CMake] matching a literal '+' in a regular expression

[David Cole]

Try "g\\+\\+.*$" -- the backslashes themselves need to be escaped inside a
CMake string first... (Then the regex parser will see it as your original
"g\+\+.*$")

The error is because CMake doesn't recognize "\+" as a string escape
sequence.

On 5/11/07, James Bigler <bigler at cs.utah.edu> wrote:
>
> How do I match a literal '+' in a regular expression?
>
> This matches in grep (because it doesn't treat '+' as a special
> character), but CMake says it can't compile it (for good reason if '+'
> is a special character).
>
> "g++.*$"
>
> I tried escaping the '+', but that didn't work either:
>
> "g\+\+.*$"
>
> syntax error, unexpected cal_ERROR, expecting $end (3), when parsing
> string "g\+\+.*$"
>
> I'm trying to match string g++, g++-4.0 etc.
>
> Thanks,
> James
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