string(REPLACE "\t" " " lines "${lines}")
string(REGEX REPLACE "/\\*([^*]/|\\*[^/]|[^*/])*\\*/" "" lines "${lines}") # multiline comments
+ string(REGEX REPLACE "/\\*([^\n])*\\*/" "" lines "${lines}") # single-line comments
string(REGEX REPLACE "[ ]*//[^\n]*\n" "\n" lines "${lines}") # single-line comments
string(REGEX REPLACE "\n[ ]*(\n[ ]*)*" "\n" lines "${lines}") # empty lines & leading whitespace
string(REGEX REPLACE "^\n" "" lines "${lines}") # leading new line