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