84 lines
2.0 KiB
C++
Vendored
84 lines
2.0 KiB
C++
Vendored
// https://github.com/kunitoki/LuaBridge3
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// Copyright 2020, kunitoki
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// Copyright 2020, Dmitry Tarakanov
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "detail/Stack.h"
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#include <array>
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namespace luabridge {
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//=================================================================================================
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/**
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* @brief Stack specialization for `std::array`.
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*/
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template <class T, std::size_t Size>
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struct Stack<std::array<T, Size>>
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{
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using Type = std::array<T, Size>;
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[[nodiscard]] static Result push(lua_State* L, const Type& array)
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{
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#if LUABRIDGE_SAFE_STACK_CHECKS
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if (! lua_checkstack(L, 3))
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return makeErrorCode(ErrorCode::LuaStackOverflow);
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#endif
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StackRestore stackRestore(L);
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lua_createtable(L, static_cast<int>(Size), 0);
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const int tableIndex = lua_gettop(L);
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for (std::size_t i = 0; i < Size; ++i)
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{
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auto result = Stack<T>::push(L, array[i]);
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if (! result)
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return result;
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lua_rawseti(L, tableIndex, static_cast<int>(i + 1));
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}
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stackRestore.reset();
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return {};
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}
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[[nodiscard]] static TypeResult<Type> get(lua_State* L, int index)
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{
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if (!lua_istable(L, index))
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return makeErrorCode(ErrorCode::InvalidTypeCast);
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if (get_length(L, index) != Size)
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return makeErrorCode(ErrorCode::InvalidTableSizeInCast);
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const StackRestore stackRestore(L);
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Type array;
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int absIndex = lua_absindex(L, index);
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lua_pushnil(L);
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int arrayIndex = 0;
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while (lua_next(L, absIndex) != 0)
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{
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auto item = Stack<T>::get(L, -1);
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if (!item)
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return makeErrorCode(ErrorCode::InvalidTypeCast);
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array[arrayIndex++] = *item;
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lua_pop(L, 1);
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}
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return array;
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}
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[[nodiscard]] static bool isInstance(lua_State* L, int index)
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{
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return lua_istable(L, index) && get_length(L, index) == Size;
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}
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};
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} // namespace luabridge
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