Alien-catch

 view release on metacpan or  search on metacpan

src/catch.hpp  view on Meta::CPAN

        }
    };

    enum class Optionality { Optional, Required };

    struct Parser;

    class ParserBase {
    public:
        virtual ~ParserBase() = default;
        virtual auto validate() const -> Result { return Result::ok(); }
        virtual auto parse( std::string const& exeName, TokenStream const &tokens) const -> InternalParseResult  = 0;
        virtual auto cardinality() const -> size_t { return 1; }

        auto parse( Args const &args ) const -> InternalParseResult {
            return parse( args.exeName(), TokenStream( args ) );
        }
    };

    template<typename DerivedT>
    class ComposableParserImpl : public ParserBase {

src/catch.hpp  view on Meta::CPAN

            else
                return ParserResult::ok( ParseResultType::Matched );
        }
    };

    class Arg : public ParserRefImpl<Arg> {
    public:
        using ParserRefImpl::ParserRefImpl;

        auto parse( std::string const &, TokenStream const &tokens ) const -> InternalParseResult override {
            auto validationResult = validate();
            if( !validationResult )
                return InternalParseResult( validationResult );

            auto remainingTokens = tokens;
            auto const &token = *remainingTokens;
            if( token.type != TokenType::Argument )
                return InternalParseResult::ok( ParseState( ParseResultType::NoMatch, remainingTokens ) );

            assert( !m_ref->isFlag() );
            auto valueRef = static_cast<detail::BoundValueRefBase*>( m_ref.get() );

src/catch.hpp  view on Meta::CPAN

            for( auto const &name : m_optNames ) {
                if( normaliseOpt( name ) == normalisedToken )
                    return true;
            }
            return false;
        }

        using ParserBase::parse;

        auto parse( std::string const&, TokenStream const &tokens ) const -> InternalParseResult override {
            auto validationResult = validate();
            if( !validationResult )
                return InternalParseResult( validationResult );

            auto remainingTokens = tokens;
            if( remainingTokens && remainingTokens->type == TokenType::Option ) {
                auto const &token = *remainingTokens;
                if( isMatch(token.token ) ) {
                    if( m_ref->isFlag() ) {
                        auto flagRef = static_cast<detail::BoundFlagRefBase*>( m_ref.get() );
                        auto result = flagRef->setFlag( true );

src/catch.hpp  view on Meta::CPAN

                            return InternalParseResult( result );
                        if( result.value() == ParseResultType::ShortCircuitAll )
                            return InternalParseResult::ok( ParseState( result.value(), remainingTokens ) );
                    }
                    return InternalParseResult::ok( ParseState( ParseResultType::Matched, ++remainingTokens ) );
                }
            }
            return InternalParseResult::ok( ParseState( ParseResultType::NoMatch, remainingTokens ) );
        }

        auto validate() const -> Result override {
            if( m_optNames.empty() )
                return Result::logicError( "No options supplied to Opt" );
            for( auto const &name : m_optNames ) {
                if( name.empty() )
                    return Result::logicError( "Option name cannot be empty" );
#ifdef CATCH_PLATFORM_WINDOWS
                if( name[0] != '-' && name[0] != '/' )
                    return Result::logicError( "Option name must begin with '-' or '/'" );
#else
                if( name[0] != '-' )
                    return Result::logicError( "Option name must begin with '-'" );
#endif
            }
            return ParserRefImpl::validate();
        }
    };

    struct Help : Opt {
        Help( bool &showHelpFlag )
        :   Opt([&]( bool flag ) {
                showHelpFlag = flag;
                return ParserResult::ok( ParseResultType::ShortCircuitAll );
            })
        {

src/catch.hpp  view on Meta::CPAN

                        TextFlow::Column( cols.right ).width( consoleWidth - 7 - optWidth );
                os << row << std::endl;
            }
        }

        friend auto operator<<( std::ostream &os, Parser const &parser ) -> std::ostream& {
            parser.writeToStream( os );
            return os;
        }

        auto validate() const -> Result override {
            for( auto const &opt : m_options ) {
                auto result = opt.validate();
                if( !result )
                    return result;
            }
            for( auto const &arg : m_args ) {
                auto result = arg.validate();
                if( !result )
                    return result;
            }
            return Result::ok();
        }

        using ParserBase::parse;

        auto parse( std::string const& exeName, TokenStream const &tokens ) const -> InternalParseResult override {