libostd/ostd/initializer_list.hh

/* Initializer list support for OctaSTD.
 *
 * This file is part of OctaSTD. See COPYING.md for futher information.
 */

#ifndef OSTD_INITIALIZER_LIST_HH
#define OSTD_INITIALIZER_LIST_HH

#include <stddef.h>

#include "ostd/range.hh"

#ifndef OSTD_ALLOW_CXXSTD
/* must be in std namespace otherwise the compiler won't know about it */
namespace std {

template<typename T>
class initializer_list {
    T const *p_buf;
    ostd::Size p_len;

    constexpr initializer_list(T const *v, ostd::Size n) noexcept:
        p_buf(v), p_len(n)
    {}
public:
    constexpr initializer_list() noexcept: p_buf(nullptr), p_len(0) {}

    constexpr ostd::Size size() const noexcept { return p_len; }

    constexpr T const *begin() const noexcept { return p_buf; }
    constexpr T const *end() const noexcept { return p_buf + p_len; }
};

}
#else
#include <initializer_list>
#endif

namespace ostd {

template<typename T>
using InitializerList = std::initializer_list<T>;

template<typename T>
PointerRange<T const> iter(std::initializer_list<T> init) noexcept {
    return PointerRange<T const>(init.begin(), init.end());
}

template<typename T>
PointerRange<T const> citer(std::initializer_list<T> init) noexcept {
    return PointerRange<T const>(init.begin(), init.end());
}

}

#endif