Function makeCommandLineParser

src/catch2/internal/catch_commandline.cpp:24–374

namespace Catch {

    Clara::Parser makeCommandLineParser( ConfigData& config ) {

        using namespace Clara;

        auto const setWarning = [&]( std::string const& warning ) {
            if ( warning == "NoAssertions" ) {
                config.warnings = static_cast<WarnAbout::What>(config.warnings | WarnAbout::NoAssertions);
                return ParserResult::ok( ParseResultType::Matched );
            } else if ( warning == "UnmatchedTestSpec" ) {
                config.warnings = static_cast<WarnAbout::What>(config.warnings | WarnAbout::UnmatchedTestSpec);
                return ParserResult::ok( ParseResultType::Matched );
            } else if ( warning == "InfiniteGenerators" ) {
                config.warnings = static_cast<WarnAbout::What>(config.warnings | WarnAbout::InfiniteGenerator);
                return ParserResult::ok( ParseResultType::Matched );
            }

            return ParserResult ::runtimeError(
                "Unrecognised warning option: '" + warning + '\'' );
        };
        auto const loadTestNamesFromFile = [&]( std::string const& filename ) {
                std::ifstream f( filename.c_str() );
                if( !f.is_open() )
                    return ParserResult::runtimeError( "Unable to load input file: '" + filename + '\'' );

                std::string line;
                while( std::getline( f, line ) ) {
                    line = trim(line);
                    if( !line.empty() && !startsWith( line, '#' ) ) {
                        if( !startsWith( line, '"' ) )
                            line = '"' + CATCH_MOVE(line) + '"';
                        config.testsOrTags.push_back( line );
                        config.testsOrTags.emplace_back( "," );
                    }
                }
                //Remove comma in the end
                if(!config.testsOrTags.empty())
                    config.testsOrTags.erase( config.testsOrTags.end()-1 );

                return ParserResult::ok( ParseResultType::Matched );
            };
        auto const setTestOrder = [&]( std::string const& order ) {
                if( startsWith( "declared", order ) )
                    config.runOrder = TestRunOrder::Declared;
                else if( startsWith( "lexical", order ) )
                    config.runOrder = TestRunOrder::LexicographicallySorted;
                else if( startsWith( "random", order ) )
                    config.runOrder = TestRunOrder::Randomized;
                else
                    return ParserResult::runtimeError( "Unrecognised ordering: '" + order + '\'' );
                return ParserResult::ok( ParseResultType::Matched );
            };
        auto const setRngSeed = [&]( std::string const& seed ) {
                if( seed == "time" ) {
                    config.rngSeed = generateRandomSeed(GenerateFrom::Time);
                    return ParserResult::ok(ParseResultType::Matched);
                } else if (seed == "random-device") {
                    config.rngSeed = generateRandomSeed(GenerateFrom::RandomDevice);
                    return ParserResult::ok(ParseResultType::Matched);