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[94f52a]: / parser / try.hpp Maximize Restore History

32 lines (26 with data), 670 Bytes

#ifndef CHILON_PARSER_TRY_HPP
#define CHILON_PARSER_TRY_HPP

#include <chilon/parser/parse.hpp>
#include <chilon/parser/unskippable.hpp>

namespace chilon { namespace parser {

template <class T>
struct try_ {
    template <class Stream>
    inline static bool skip(Stream& stream) {
        auto bak = stream.begin();
        if (T::skip(stream)) {
            stream.begin() = bak;
            return true;
        }
        else return false;
    }
};

template <class T>
struct parse<try_<T>> : unskippable< try_<T> > {
    template <class Stream, class O>
    inline static bool skip(Stream& stream, O&) {
        return try_<T>::skip(stream);
    }
};

} }
#endif

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[94f52a]: / parser / try.hpp Maximize Restore History

32 lines (26 with data), 670 Bytes