I'm writing a CMakeFile that has the following lines:
configure_file(version.hpp.in version.hpp @ONLY)
file(READ "${CMAKE_CURRENT_BINARY_DIR}/version.hpp" ver)
string(REGEX MATCH "APP_DESCRIPTION ([^\n]*)" _ ${ver})
message("app description: ${APP_DESCRIPTION}")
The version.hpp.in:
#define APP_DESCRIPTION ("this is a demo application")
which will be parsed into version.hpp with the same content.
The output of cmake:
app description: ("this is a demo application")
Although the string(REGEX MATCH "APP_DESCRIPTION ([^\n]*)" _ ${ver}) did exactly what I need it to do, I still don't understand why [^\n]* could work (this line is written by IDE auto-completion).
As my understanding, ^\n means the word starts with a new line character, how is it matching the content in my version.hpp? And why my IDE suggested this line?
