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use iterator based regex replace

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This commit is contained in:
Dennis Luxen 2013-10-21 11:46:17 +02:00
parent cf69f43166
commit a1ab2232f3
1 changed files with 13 additions and 7 deletions
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18
Util/ProgramOptions.h
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@ -52,7 +52,7 @@ namespace boost {
// Validator for boost::filesystem::path, that verifies that the file // Validator for boost::filesystem::path, that verifies that the file
// exists. The validate() function must be defined in the same namespace // exists. The validate() function must be defined in the same namespace
// as the target type, (boost::filesystem::path in this case), otherwise // as the target type, (boost::filesystem::path in this case), otherwise
// it is not be called // it is not called
inline void validate( inline void validate(
boost::any & v, boost::any & v,
const std::vector<std::string> & values, const std::vector<std::string> & values,
@ -71,21 +71,27 @@ namespace boost {
} }
} }
// support old capitalized option names by downcasing them with a regex replace // support old capitalized option names by down-casing them with a regex replace
// read from file and store in a stringstream that can be passed to
// boost::program_options
inline void PrepareConfigFile( inline void PrepareConfigFile(
const boost::filesystem::path& path, const boost::filesystem::path& path,
std::string& output std::string& output
) { ) {
BOOST_ASSERT_MSG( output.empty(), "output string not empty");
std::ifstream config_stream( path.string().c_str() ); std::ifstream config_stream( path.string().c_str() );
std::string input_str( std::string input_string(
(std::istreambuf_iterator<char>(config_stream)), (std::istreambuf_iterator<char>(config_stream)),
std::istreambuf_iterator<char>() std::istreambuf_iterator<char>()
); );
boost::regex regex( "^([^=]*)" ); //match from start of line to '=' boost::regex regex( "^([^=]*)" ); //match from start of line to '='
std::string format( "\\L$1\\E" ); //replace with downcased substring std::string format( "\\L$1\\E" ); //replace with downcased substring
output = boost::regex_replace( input_str, regex, format );
boost::regex_replace(
output.begin(),
input_string.begin(),
input_string.end(),
regex,
format
);
} }