construct_at.hpp

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#ifndef BSL_CONSTRUCT_AT_HPP
#define BSL_CONSTRUCT_AT_HPP

#include "discard.hpp"
#include "declval.hpp"
#include "forward.hpp"

#ifndef PERFORCE

constexpr void *
operator new(bsl::uintmax count, void *ptr) noexcept    // PRQA S 1-10000
{
    bsl::discard(count);
    return ptr;
}

namespace std    // NOLINT
{
    template<typename T, typename... ARGS>
    constexpr void
    construct_at_impl(void *const ptr, ARGS &&... args)    // --
        noexcept(noexcept(new (ptr) T{bsl::declval<ARGS>()...}))
    {
        if (nullptr == ptr) {
            return;
        }

        bsl::discard(new (ptr) T{bsl::forward<ARGS>(args)...});    // NOLINT // PRQA S 1-10000
    }
}

namespace bsl
{
    template<typename T, typename... ARGS>
    constexpr void
    construct_at(void *const ptr, ARGS &&... args)    // --
        noexcept(noexcept(std::construct_at_impl<T, ARGS...>(ptr, bsl::declval<ARGS>()...)))
    {
        std::construct_at_impl<T, ARGS...>(ptr, bsl::forward<ARGS>(args)...);
    }
}

#else

namespace bsl
{
    template<typename T, typename... ARGS>
    constexpr void
    construct_at(void *ptr, ARGS &&... args) noexcept
    {
        bsl::discard(ptr);
        bsl::discard(bsl::forward<ARGS>(args)...);
    }
}

#endif

#endif