[Cmake] Regex question

[Dekeyser, Kris]

I cannot get a regular expression to work the way I want. I've read both the
on-line FAQ and the book, but I cannot figure out what I'm doing wrong.

I have the following string:
"\b\t\bSTL\t\b\t"

(\b stands for space, \t for tab)

When I'm parsing the string with:
STRING(REGEX REPLACE "^[ \t]*([A-Za-z_]*)[ \t]*$" "\\1" Dependency ${line})

CMake errors with:
CMake Error: Error in cmake code at
:0:
STRING sub-command REGEX, mode REPLACE regex "^[        ]*([A-Za-z_]*)[
]*$" matched an empty string.

and the Dependency variable is not set. Why? What am I doing wrong?

Parsing "\b\t\bpublic\t:\bSTL\b\t" with STRING(REGEX REPLACE "^[ \t]*public[
\t]*:[ \t]*([A-Za-z_]*)[ \t]*$" "\\1" Dependency ${line}) yields the correct
result, though.

- Kris

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