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function(escape_string_as_regex _str_out _str_in)
string(REGEX REPLACE "\\\\" "\\\\\\\\" FILETEST2 "${_str_in}")
string(REGEX REPLACE "([.$+*?|-])" "\\\\\\1" FILETEST2 "${FILETEST2}")
string(REGEX REPLACE "\\^" "\\\\^" FILETEST2 "${FILETEST2}")
string(REGEX REPLACE "\\(" "\\\\(" FILETEST2 "${FILETEST2}")
string(REGEX REPLACE "\\)" "\\\\)" FILETEST2 "${FILETEST2}")
string(REGEX REPLACE "\\[" "\\\\[" FILETEST2 "${FILETEST2}")
string(REGEX REPLACE "\\]" "\\\\]" FILETEST2 "${FILETEST2}")
set(${_str_out} "${FILETEST2}" PARENT_SCOPE)
endfunction()
function(test_escape_string_as_regex)
set(test1 "\\.^$-+*()[]?|")
escape_string_as_regex(test2 "${test1}")
set(testRef "\\\\\\.\\^\\$\\-\\+\\*\\(\\)\\[\\]\\?\\|")
if(NOT test2 STREQUAL testRef)
message("Error in the escape_string_for_regex function : \n ${test1} was escaped as ${test2}, should be ${testRef}")
endif()
endfunction()
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