Quoting Bill Hoffman <[EMAIL PROTECTED]>:
Pau Garcia i Quiles wrote:
I took a quick look a few weeks ago and replacing the current regex
library with PCRE seems "easy" (most of the work would be
replacing the regexp's in current .cmake files with their POSIX
equivalents). Is Kitware or anyone else already working on that?
Sounds like a backwards compatibility problem.... I am sure we would
break tons of projects if we changed the REGEX format in cmake.
-Bill
That was my first thought, too, but we could keep backwards
compatibility easily.
It'd just be a matter of having something like:
SET( REGULAR_EXPRESSIONS CMAKE_CLASSICAL)
or
SET( REGULAR_EXPRESSIONS POSIX)
Even better, prepending an unusual-enough character we could have both
regular expressions at once in the same project. Say we decide "~" is
that character. If we write STRING( REGEX_MATCH "whatever" MYOUTVAR
${MYINPUTTEXT} ) CMake uses current regular expressions, if we write
STRING( REGEX_MATCH "~whatever" MYOUTVAR ${MYINPUTTEXT} ) CMake uses
POSIX regular epxressions. To match "~" we would use it escaped: "\~".
Another option would be to have something like STRING(
POSIX_REGEX_MATCH ...), etc but I like the "~" better.
--
Pau Garcia i Quiles
http://www.elpauer.org
(Due to my workload, I may need 10 days to answer)
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