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/*
This file is part of Android File Transfer For Linux.
Copyright (C) 2015-2020 Vladimir Menshakov
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AFTL_CLI_MAKETUPLE_H
#define AFTL_CLI_MAKETUPLE_H
#include <sstream>
#include <functional>
#include <mtp/types.h>
#include <mtp/Demangle.h>
namespace cli
{
namespace impl
{
template<typename T>
struct ValueConverter;
template<typename T>
struct StringStreamConverter
{
static T Convert(const std::string &text)
{
std::stringstream ss(text);
T value;
ss >> std::noskipws >> value;
return value;
}
};
template<>
struct ValueConverter<mtp::u32> : StringStreamConverter<mtp::u32>
{ };
template<>
struct ValueConverter<std::string>
{
static std::string Convert(const std::string &text)
{ return text; }
};
template<typename IteratorType, typename ... Tail>
struct TupleBuilder
{
std::tuple<> Result;
TupleBuilder(IteratorType begin, IteratorType end) { }
};
template<typename IteratorType, typename First, typename ... Tail>
struct TupleBuilder<IteratorType, First, Tail...>
{
typedef typename std::decay<First>::type ValueType;
std::string _text;
TupleBuilder<IteratorType, Tail...> _next;
typedef std::tuple<ValueType, typename std::decay<Tail>::type ... > ResultType;
ResultType Result;
static IteratorType Next(IteratorType & begin, IteratorType end)
{
if (begin == end)
throw std::runtime_error("not enough arguments");
return begin++;
}
TupleBuilder(IteratorType begin, IteratorType end):
_text(*Next(begin, end)), _next(begin, end)
{ Result = std::tuple_cat(std::make_tuple(ValueConverter<ValueType>::Convert(_text)), _next.Result); }
};
}
template<typename IteratorType>
std::tuple<> MakeTuple(IteratorType, IteratorType)
{ return std::tuple<>(); }
template<typename IteratorType, typename ...FuncArgs>
auto MakeTuple(IteratorType begin, IteratorType end) -> typename impl::TupleBuilder<IteratorType, FuncArgs...>::ResultType
{
impl::TupleBuilder<IteratorType, FuncArgs...> b(begin, end);
return b.Result;
}
};
#endif
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