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https://github.com/ThePhD/sol2.git
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105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_STACK_CHECK_GET_HPP
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#define SOL_STACK_CHECK_GET_HPP
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#include "stack_core.hpp"
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#include "stack_get.hpp"
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#include "stack_check.hpp"
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#include "optional.hpp"
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namespace sol {
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namespace stack {
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template <typename T, typename>
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struct check_getter {
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typedef stack_detail::strip_t<T> U;
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typedef std::conditional_t<is_proxy_primitive<T>::value, U, U&> R;
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template <typename Handler>
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static optional<R> get(lua_State* L, int index, Handler&& handler) {
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if (!check<T>(L, index, std::forward<Handler>(handler)))
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return nullopt;
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return stack_detail::unchecked_get<T>(L, index);
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}
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};
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template <typename T>
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struct check_getter<optional<T>> {
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template <typename Handler>
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static decltype(auto) get(lua_State* L, int index, Handler&&) {
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return check_get<T>(L, index, no_panic);
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}
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};
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template <typename T>
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struct check_getter<T, std::enable_if_t<std::is_integral<T>::value && lua_type_of<T>::value == type::number>> {
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template <typename Handler>
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static optional<T> get(lua_State* L, int index, Handler&& handler) {
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int isnum = 0;
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lua_Integer value = lua_tointegerx(L, index, &isnum);
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if (isnum == 0) {
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handler(L, index, type::number, type_of(L, index));
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return nullopt;
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}
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return static_cast<T>(value);
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}
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};
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template <typename T>
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struct check_getter<T, std::enable_if_t<std::is_enum<T>::value && !meta::any_same<T, meta_function, type>::value>> {
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template <typename Handler>
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static optional<T> get(lua_State* L, int index, Handler&& handler) {
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int isnum = 0;
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lua_Integer value = lua_tointegerx(L, index, &isnum);
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if (isnum == 0) {
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handler(L, index, type::number, type_of(L, index));
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return nullopt;
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}
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return static_cast<T>(value);
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}
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};
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template <typename T>
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struct check_getter<T, std::enable_if_t<std::is_floating_point<T>::value>> {
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template <typename Handler>
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static optional<T> get(lua_State* L, int index, Handler&& handler) {
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int isnum = 0;
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lua_Number value = lua_tonumberx(L, index, &isnum);
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if (isnum == 0) {
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handler(L, index, type::number, type_of(L, index));
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return nullopt;
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}
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return static_cast<T>(value);
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}
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};
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template <typename T>
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struct getter<optional<T>> {
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static decltype(auto) get(lua_State* L, int index) {
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return check_get<T>(L, index);
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}
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};
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} // stack
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} // sol
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#endif // SOL_STACK_CHECK_GET_HPP
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