qtutil.h

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/**********************************************************************
 * LeechCraft - modular cross-platform feature rich internet client.
 * Copyright (C) 2006-2014  Georg Rudoy
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
 * works are solely in the form of machine-executable object code generated by
 * a source language processor.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
 * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 **********************************************************************/

#pragma once

#include <tuple>
#include <boost/range.hpp>
#include "sllconfig.h"

namespace LeechCraft
{
namespace Util
{
    namespace detail
    {
        template<template<typename> class F, typename V>
        using MF = typename F<V>::type;

        template<typename T>
        struct Identity
        {
            using type = T;
        };

        template<
                template<template<typename> class, template<typename> class, typename, template<typename, typename> class> class This,
                template<typename> class KeyMF,
                template<typename> class ValueMF,
                typename Iter,
                template<typename, typename> class PairType,
                typename KeyType = MF<KeyMF, decltype (Iter {}.key ())>,
                typename ValueType = MF<ValueMF, decltype (Iter {}.value ())>
            >
        using IteratorAdaptorBase = boost::iterator_adaptor<
                This<KeyMF, ValueMF, Iter, PairType>,
                Iter,
                PairType<KeyType, ValueType>,
                boost::use_default,
                PairType<KeyType, ValueType>
            >;

        template<
                template<typename> class KeyMF,
                template<typename> class ValueMF,
                typename Iter,
                template<typename, typename> class PairType
            >
        class StlAssocIteratorAdaptor : public IteratorAdaptorBase<StlAssocIteratorAdaptor, KeyMF, ValueMF, Iter, PairType>
        {
            friend class boost::iterator_core_access;

            using Super_t = IteratorAdaptorBase<detail::StlAssocIteratorAdaptor, KeyMF, ValueMF, Iter, PairType>;
        public:
            StlAssocIteratorAdaptor () = default;

            StlAssocIteratorAdaptor (Iter it)
            : Super_t { it }
            {
            }
        private:
            typename Super_t::reference dereference () const
            {
                return { this->base ().key (), this->base ().value () };
            }
        };

        template<
                template<typename> class KeyMF,
                template<typename> class ValueMF,
                typename Iter,
                typename Assoc,
                template<typename K, typename V> class PairType
            >
        struct StlAssocRange : private std::tuple<Assoc>
                             , public boost::iterator_range<StlAssocIteratorAdaptor<KeyMF, ValueMF, Iter, PairType>>
        {
        public:
            StlAssocRange (Assoc&& assoc)
            : std::tuple<Assoc> { std::move (assoc) }
            , boost::iterator_range<StlAssocIteratorAdaptor<KeyMF, ValueMF, Iter, PairType>> { std::get<0> (*this).begin (), std::get<0> (*this).end () }
            {
            }
        };

        template<
                template<typename> class KeyMF,
                template<typename> class ValueMF,
                typename Iter,
                typename Assoc,
                template<typename K, typename V> class PairType
            >
        struct StlAssocRange<KeyMF, ValueMF, Iter, Assoc&, PairType> : public boost::iterator_range<StlAssocIteratorAdaptor<KeyMF, ValueMF, Iter, PairType>>
        {
        public:
            StlAssocRange (Assoc& assoc)
            : boost::iterator_range<StlAssocIteratorAdaptor<KeyMF, ValueMF, Iter, PairType>> { assoc.begin (), assoc.end () }
            {
            }
        };
    }

    template<template<typename K, typename V> class PairType = std::pair, typename Assoc>
    auto Stlize (Assoc&& assoc) -> detail::StlAssocRange<detail::Identity, detail::Identity, decltype (assoc.begin ()), Assoc, PairType>
    {
        return { std::forward<Assoc> (assoc) };
    }

    template<template<typename K, typename V> class PairType = std::pair, typename Assoc>
    auto StlizeCopy (Assoc&& assoc) -> detail::StlAssocRange<std::decay, std::decay, decltype (assoc.begin ()), Assoc, PairType>
    {
        return { std::forward<Assoc> (assoc) };
    }

    UTIL_SLL_API QString Escape (const QString&);
}
}