68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
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// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2022 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_GUARD_HPP
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#define SOL_STACK_GUARD_HPP
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#include <sol/compatibility/lua_version.hpp>
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#include <sol/error.hpp>
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#include <functional>
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namespace sol {
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namespace detail {
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inline void stack_fail(int, int) {
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#if SOL_IS_ON(SOL_EXCEPTIONS)
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throw error(detail::direct_error, "imbalanced stack after operation finish");
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#else
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// Lol, what do you want, an error printout? :3c
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// There's no sane default here. The right way would be C-style abort(), and that's not acceptable, so
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// hopefully someone will register their own stack_fail thing for the `fx` parameter of stack_guard.
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#endif // No Exceptions
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}
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} // namespace detail
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struct stack_guard {
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lua_State* L;
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int top;
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std::function<void(int, int)> on_mismatch;
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stack_guard(lua_State* L) : stack_guard(L, lua_gettop(L)) {
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}
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stack_guard(lua_State* L, int top, std::function<void(int, int)> fx = detail::stack_fail) : L(L), top(top), on_mismatch(std::move(fx)) {
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}
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bool check_stack(int modification = 0) const {
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int bottom = lua_gettop(L) + modification;
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if (top == bottom) {
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return true;
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}
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on_mismatch(top, bottom);
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return false;
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}
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~stack_guard() {
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check_stack();
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}
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};
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} // namespace sol
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#endif // SOL_STACK_GUARD_HPP
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