[cmake-developers] [CMake 0014336]: REGEX REPLACE does not give correct results for a left anchor (^) combined with careted brackets

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://www.cmake.org/Bug/view.php?id=14336 
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Reported By:                irwin
Assigned To:                
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Project:                    CMake
Issue ID:                   14336
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2013-08-03 02:18 EDT
Last Modified:              2013-08-03 02:18 EDT
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Summary:                    REGEX REPLACE does not give correct results for a
left anchor (^) combined with careted brackets
Description: 
# Test code to show the issue.
set(filename "whatever")
string(REGEX REPLACE "(^[e])" "/\\1" CATALOG_filename  "${filename}")
message(STATUS "filename=${filename}")
message(STATUS "CATALOG_filename=${CATALOG_filename}")
string(REGEX REPLACE "(^[^e])" "/\\1" CATALOG_filename  "${filename}")
message(STATUS "filename=${filename}")
message(STATUS "CATALOG_filename=${CATALOG_filename}")

The first REGEX REPLACE gives a correct result (no match because of the anchor
so no replacement is done) while the second REGEX REPLACE produces an incorrect
result (anchor ignored until the "e" is hit in whatever).


Steps to Reproduce: 
Run the above code using cmake -P.  The results are

-- filename=whatever
-- CATALOG_filename=whatever
-- filename=whatever
-- CATALOG_filename=/w/h/a/tever

That last one should be

-- CATALOG_filename=/whatever

because the anchor should limit the match to just the first character (so long
as that first character is not an "e" as in this case) so the "/" should be
prepended only to the first character.

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Issue History 
Date Modified    Username       Field                    Change               
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2013-08-03 02:18 irwin          New Issue                                    
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