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// sol3
// The MIT License (MIT)
// Copyright (c) 2013-2019 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_LUA_VALUE_HPP
#define SOL_LUA_VALUE_HPP
#include "stack.hpp"
#include "reference.hpp"
#include "make_reference.hpp"
namespace sol {
struct lua_value {
public:
struct arr : detail::ebco<std::initializer_list<lua_value>> {
private:
using base_t = detail::ebco<std::initializer_list<lua_value>>;
public:
using base_t::base_t;
};
private:
template <typename T>
using is_reference_or_lua_value_init_list
= meta::any<meta::is_specialization_of<T, std::initializer_list>, std::is_same<T, reference>, std::is_same<T, arr>>;
template <typename T>
using is_lua_value_single_constructible = meta::any<std::is_same<T, lua_value>, is_reference_or_lua_value_init_list<T>>;
static lua_State*& thread_local_lua_state() {
static thread_local lua_State* L = nullptr;
return L;
}
reference ref_value;
public:
static void set_lua_state(lua_State* L) {
thread_local_lua_state() = L;
}
template <typename T, meta::disable<is_reference_or_lua_value_init_list<meta::unqualified_t<T>>> = meta::enabler>
lua_value(lua_State* L_, T&& value) : lua_value(((set_lua_state(L_)), std::forward<T>(value))) {
}
template <typename T, meta::disable<is_lua_value_single_constructible<meta::unqualified_t<T>>> = meta::enabler>
lua_value(T&& value) : ref_value(make_reference(thread_local_lua_state(), std::forward<T>(value))) {
}
lua_value(lua_State* L_, std::initializer_list<std::pair<lua_value, lua_value>> il)
: lua_value([&L_, &il]() {
set_lua_state(L_);
return std::move(il);
}()) {
}
lua_value(std::initializer_list<std::pair<lua_value, lua_value>> il) : ref_value(make_reference(thread_local_lua_state(), std::move(il))) {
}
lua_value(lua_State* L_, arr il)
: lua_value([&L_, &il]() {
set_lua_state(L_);
return std::move(il);
}()) {
}
lua_value(arr il) : ref_value(make_reference(thread_local_lua_state(), std::move(il.value()))) {
}
lua_value(lua_State* L_, reference r)
: lua_value([&L_, &r]() {
set_lua_state(L_);
return std::move(r);
}()) {
}
lua_value(reference r) : ref_value(std::move(r)) {
}
lua_value(const lua_value&) noexcept = default;
lua_value(lua_value&&) = default;
lua_value& operator=(const lua_value&) = default;
lua_value& operator=(lua_value&&) = default;
const reference& value() const& {
return ref_value;
}
reference& value() & {
return ref_value;
}
reference&& value() && {
return std::move(ref_value);
}
template <typename T>
decltype(auto) as() const {
ref_value.push();
return stack::pop<T>(ref_value.lua_state());
}
template <typename T>
bool is() const {
int r = ref_value.registry_index();
if (r == LUA_REFNIL)
return meta::any_same<meta::unqualified_t<T>, lua_nil_t, nullopt_t, std::nullptr_t>::value ? true : false;
if (r == LUA_NOREF)
return false;
auto pp = stack::push_pop(ref_value);
return stack::check<T>(ref_value.lua_state(), -1, no_panic);
}
};
using array_value = typename lua_value::arr;
namespace stack {
template <>
struct unqualified_pusher<lua_value> {
static int push(lua_State* L, const lua_value& lv) {
return stack::push(L, lv.value());
}
static int push(lua_State* L, lua_value&& lv) {
return stack::push(L, std::move(lv).value());
}
};
template <>
struct unqualified_getter<lua_value> {
static lua_value get(lua_State* L, int index, record& tracking) {
return lua_value(L, stack::get<reference>(L, index, tracking));
}
};
}
} // namespace sol
#endif // SOL_LUA_VALUE_HPP
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