[CMake] Regex help: multi-line matching and matching backslashes

[David Cole]

It should work.

But I'm pretty sure we don't recognize "\s" for white space. Try "[
\\t\\n\\r]" instead of \\s.

But..... watch out for white space after "(" and before ")" too. You might
miss some lines if they have spaces there.


On Fri, Jan 7, 2011 at 2:55 PM, Ben Medina <ben.medina at gmail.com> wrote:

> I need to parse a C++ file for Google Test macros. (I'm aware the
> GTEST_ADD_TESTS provided by FindGtest.cmake, but I need the test list
> for my own purposes). I had been using a regex similar to the one in
> GTEST_ADD_TESTS to match tests:
>
> string (REGEX MATCHALL "TEST_?F?\\([A-Za-z_0-9 ,]+)\\)" found_tests
> ${contents})
>
> But this doesn't work when the test is split onto two lines, like this:
>
> TEST(SampleTest,\
>     MultilineTest)
>
> So, I've been trying to build a regex that will match tests split onto
> multiple lines. This should work:
>
> string (REGEX MATCHALL "TEST_?F?\\([A-Za-z_0-9
> ]+,[\\s\\\\]*[A-Za-z_0-9 ]+\\)" found_tests ${contents})
>
> After the comma, the regex should greedily match all whitespace
> (including newlines) via the "\\s" and backslashes via the "\\\\"
> (Note that all special characters are escaped). This works in other
> regex engines, but fails in CMake.
>
> Is this possible in CMake, or do I need to use another tool?
>
> Here is my test file (named tests.cpp):
>
> TEST(SampleTest, SingleLineTest)
> TEST(SampleTest,\
>     MultilineTest)
> TEST_F(SampleTest, SingleLineFixtureTest)
> TEST_F(SampleTest,\
>     MultilineFixtureTest)
>
> And my CMakeLists.txt:
>
> cmake_minimum_required (VERSION 2.8)
>
> file (READ "tests.cpp" contents)
> string (REGEX MATCHALL "TEST_?F?\\([A-Za-z_0-9
> ]+,[\\s\\\\]*[A-Za-z_0-9 ]+\\)" found_tests ${contents})
> message ("Found tests:")
> foreach (test ${found_tests})
>    message ("${test}")
> endforeach ()
>
> Thanks,
> Ben
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