Method set

tests/catch.h:4124–4128

        struct BoundBinaryFunction : IArgFunction<C>{
            BoundBinaryFunction( void (*_function)( C&, T ) ) : function( _function ) {}
            virtual void set( C& obj, std::string const& stringValue ) const {
                typename RemoveConstRef<T>::type value;
                convertInto( stringValue, value );
                function( obj, value );
            }
            virtual void setFlag( C& obj ) const {
                typename RemoveConstRef<T>::type value;
                convertInto( true, value );