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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 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_LOAD_RESULT_HPP
#define SOL_LOAD_RESULT_HPP
#include <sol/stack.hpp>
#include <sol/function.hpp>
#include <sol/proxy_base.hpp>
#include <cstdint>
namespace sol {
struct load_result : public proxy_base<load_result> {
private:
lua_State* L;
int index;
int returncount;
int popcount;
load_status err;
public:
load_result() noexcept : load_result(nullptr) {}
load_result(lua_State* Ls, int stackindex = -1, int retnum = 0, int popnum = 0, load_status lerr = load_status::ok) noexcept
: L(Ls), index(stackindex), returncount(retnum), popcount(popnum), err(lerr) {
}
// We do not want anyone to copy these around willy-nilly
// Will likely break people, but also will probably get rid of quiet bugs that have
// been lurking. (E.g., Vanilla Lua will just quietly discard over-pops and under-pops:
// LuaJIT and other Lua engines will implode and segfault at random later times.)
load_result(const load_result&) = delete;
load_result& operator=(const load_result&) = delete;
load_result(load_result&& o) noexcept : L(o.L), index(o.index), returncount(o.returncount), popcount(o.popcount), err(o.err) {
// Must be manual, otherwise destructor will screw us
// return count being 0 is enough to keep things clean
// but we will be thorough
o.L = nullptr;
o.index = 0;
o.returncount = 0;
o.popcount = 0;
o.err = load_status::syntax;
}
load_result& operator=(load_result&& o) noexcept {
L = o.L;
index = o.index;
returncount = o.returncount;
popcount = o.popcount;
err = o.err;
// Must be manual, otherwise destructor will screw us
// return count being 0 is enough to keep things clean
// but we will be thorough
o.L = nullptr;
o.index = 0;
o.returncount = 0;
o.popcount = 0;
o.err = load_status::syntax;
return *this;
}
load_status status() const noexcept {
return err;
}
bool valid() const noexcept {
return status() == load_status::ok;
}
template <typename T>
T get() const {
using UT = meta::unqualified_t<T>;
if constexpr (meta::is_optional_v<UT>) {
using ValueType = typename UT::value_type;
if constexpr (std::is_same_v<ValueType, error>) {
if (valid()) {
return UT(nullopt);
}
return stack::stack_detail::get_error(L, index);
}
else {
if (!valid()) {
return UT(nullopt);
}
return stack::get<UT>(L, index);
}
}
else {
if constexpr (std::is_same_v<T, error>) {
#if SOL_IS_ON(SOL_SAFE_PROXIES)
if (valid()) {
type_panic_c_str(L, index, type_of(L, index), type::none, "expecting an error type (a string, from Lua)");
}
#endif // Check proxy type's safety
return stack::stack_detail::get_error(L, index);
}
else {
#if SOL_IS_ON(SOL_SAFE_PROXIES)
if (!valid()) {
type_panic_c_str(L, index, type_of(L, index), type::none);
}
#endif // Check proxy type's safety
return stack::get<T>(L, index);
}
}
}
template <typename... Ret, typename... Args>
decltype(auto) call(Args&&... args) {
return get<protected_function>().template call<Ret...>(std::forward<Args>(args)...);
}
template <typename... Args>
decltype(auto) operator()(Args&&... args) {
return call<>(std::forward<Args>(args)...);
}
lua_State* lua_state() const noexcept {
return L;
};
int stack_index() const noexcept {
return index;
};
~load_result() {
if (L != nullptr) {
stack::remove(L, index, popcount);
}
}
};
} // namespace sol
#endif // SOL_LOAD_RESULT_HPP
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