2021-03-06 23:14:48 +08:00
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// sol2
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2017-12-20 17:58:32 +08:00
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2017-09-13 14:46:56 +08:00
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// The MIT License (MIT)
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2016-03-03 10:02:12 +08:00
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2022-06-25 16:00:53 +08:00
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// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
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2016-03-03 10:02:12 +08:00
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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_PROTECTED_FUNCTION_RESULT_HPP
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#define SOL_PROTECTED_FUNCTION_RESULT_HPP
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2020-08-10 05:17:06 +08:00
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#include <sol/reference.hpp>
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#include <sol/tuple.hpp>
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#include <sol/stack.hpp>
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#include <sol/proxy_base.hpp>
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#include <sol/stack_iterator.hpp>
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#include <sol/stack_proxy.hpp>
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#include <sol/error.hpp>
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#include <sol/stack.hpp>
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2016-04-17 14:32:51 +08:00
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#include <cstdint>
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2016-03-03 10:02:12 +08:00
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namespace sol {
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2016-06-20 05:59:40 +08:00
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struct protected_function_result : public proxy_base<protected_function_result> {
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private:
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lua_State* L;
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int index;
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int returncount;
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int popcount;
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call_status err;
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public:
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2017-11-10 06:41:46 +08:00
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typedef stack_proxy reference_type;
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typedef stack_proxy value_type;
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typedef stack_proxy* pointer;
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typedef std::ptrdiff_t difference_type;
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typedef std::size_t size_type;
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typedef stack_iterator<stack_proxy, false> iterator;
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typedef stack_iterator<stack_proxy, true> const_iterator;
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typedef std::reverse_iterator<iterator> reverse_iterator;
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
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2022-06-24 19:43:54 +08:00
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protected_function_result() noexcept : protected_function_result(nullptr) {}
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2017-09-13 14:46:56 +08:00
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protected_function_result(lua_State* Ls, int idx = -1, int retnum = 0, int popped = 0, call_status pferr = call_status::ok) noexcept
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: L(Ls), index(idx), returncount(retnum), popcount(popped), err(pferr) {
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2016-06-20 05:59:40 +08:00
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}
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2020-09-26 18:47:20 +08:00
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// We do not want anyone to copy these around willy-nilly
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// Will likely break people, but also will probably get rid of quiet bugs that have
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// been lurking. (E.g., Vanilla Lua will just quietly discard over-pops and under-pops:
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// LuaJIT and other Lua engines will implode and segfault at random later times.)
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protected_function_result(const protected_function_result&) = delete;
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protected_function_result& operator=(const protected_function_result&) = delete;
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2017-09-13 14:46:56 +08:00
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protected_function_result(protected_function_result&& o) noexcept
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: L(o.L), index(o.index), returncount(o.returncount), popcount(o.popcount), err(o.err) {
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2016-06-20 05:59:40 +08:00
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// Must be manual, otherwise destructor will screw us
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// return count being 0 is enough to keep things clean
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// but we will be thorough
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o.abandon();
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2016-06-20 05:59:40 +08:00
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}
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protected_function_result& operator=(protected_function_result&& o) noexcept {
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L = o.L;
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index = o.index;
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returncount = o.returncount;
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popcount = o.popcount;
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err = o.err;
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// Must be manual, otherwise destructor will screw us
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// return count being 0 is enough to keep things clean
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// but we will be thorough
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2017-08-07 00:20:32 +08:00
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o.abandon();
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2016-06-20 05:59:40 +08:00
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return *this;
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}
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2017-11-08 09:19:36 +08:00
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protected_function_result(const unsafe_function_result& o) = delete;
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protected_function_result& operator=(const unsafe_function_result& o) = delete;
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protected_function_result(unsafe_function_result&& o) noexcept;
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protected_function_result& operator=(unsafe_function_result&& o) noexcept;
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2017-08-27 12:05:35 +08:00
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2016-06-20 05:59:40 +08:00
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call_status status() const noexcept {
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return err;
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}
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bool valid() const noexcept {
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return status() == call_status::ok || status() == call_status::yielded;
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}
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2022-06-24 21:51:09 +08:00
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#if SOL_IS_ON(SOL_COMPILER_GCC)
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#pragma GCC diagnostic push
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2022-11-05 01:47:13 +08:00
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#if !SOL_IS_ON(SOL_COMPILER_CLANG)
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2022-06-24 21:51:09 +08:00
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#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
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2022-11-05 01:47:13 +08:00
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#endif
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2022-06-24 21:51:09 +08:00
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#endif
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2017-09-13 14:46:56 +08:00
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template <typename T>
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2017-11-08 09:19:36 +08:00
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decltype(auto) get(int index_offset = 0) const {
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2020-05-22 21:38:53 +08:00
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using UT = meta::unqualified_t<T>;
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int target = index + index_offset;
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if constexpr (meta::is_optional_v<UT>) {
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using ValueType = typename UT::value_type;
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if constexpr (std::is_same_v<ValueType, error>) {
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if (valid()) {
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2020-05-27 08:08:38 +08:00
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return UT();
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2020-05-22 21:38:53 +08:00
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}
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return UT(error(detail::direct_error, stack::get<std::string>(L, target)));
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}
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else {
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if (!valid()) {
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return UT();
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}
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2020-05-27 08:08:38 +08:00
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return stack::get<UT>(L, target);
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2020-05-22 21:38:53 +08:00
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}
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}
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else {
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if constexpr (std::is_same_v<T, error>) {
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2022-06-23 04:32:13 +08:00
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#if SOL_IS_ON(SOL_SAFE_PROXIES)
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2020-05-22 21:38:53 +08:00
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if (valid()) {
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type t = type_of(L, target);
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type_panic_c_str(L, target, t, type::none, "bad get from protected_function_result (is an error)");
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}
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#endif // Check Argument Safety
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return error(detail::direct_error, stack::get<std::string>(L, target));
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}
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else {
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2022-06-23 04:32:13 +08:00
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#if SOL_IS_ON(SOL_SAFE_PROXIES)
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2020-05-22 21:38:53 +08:00
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if (!valid()) {
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type t = type_of(L, target);
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type_panic_c_str(L, target, t, type::none, "bad get from protected_function_result (is not an error)");
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}
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#endif // Check Argument Safety
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return stack::get<T>(L, target);
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}
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}
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2016-06-20 05:59:40 +08:00
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}
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2022-06-24 21:51:09 +08:00
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#if SOL_IS_ON(SOL_COMPILER_GCC)
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#pragma GCC diagnostic pop
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#endif
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2020-03-31 12:22:46 +08:00
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type get_type(int index_offset = 0) const noexcept {
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2017-11-10 06:41:46 +08:00
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return type_of(L, index + static_cast<int>(index_offset));
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}
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stack_proxy operator[](difference_type index_offset) const {
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return stack_proxy(L, index + static_cast<int>(index_offset));
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}
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iterator begin() {
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return iterator(L, index, stack_index() + return_count());
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}
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iterator end() {
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return iterator(L, stack_index() + return_count(), stack_index() + return_count());
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}
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const_iterator begin() const {
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return const_iterator(L, index, stack_index() + return_count());
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}
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const_iterator end() const {
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return const_iterator(L, stack_index() + return_count(), stack_index() + return_count());
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}
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const_iterator cbegin() const {
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return begin();
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}
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const_iterator cend() const {
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return end();
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}
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reverse_iterator rbegin() {
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return std::reverse_iterator<iterator>(begin());
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}
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reverse_iterator rend() {
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return std::reverse_iterator<iterator>(end());
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}
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const_reverse_iterator rbegin() const {
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return std::reverse_iterator<const_iterator>(begin());
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}
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const_reverse_iterator rend() const {
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return std::reverse_iterator<const_iterator>(end());
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}
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const_reverse_iterator crbegin() const {
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return std::reverse_iterator<const_iterator>(cbegin());
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}
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const_reverse_iterator crend() const {
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return std::reverse_iterator<const_iterator>(cend());
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}
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2017-09-13 14:46:56 +08:00
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lua_State* lua_state() const noexcept {
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return L;
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};
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int stack_index() const noexcept {
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return index;
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};
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int return_count() const noexcept {
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return returncount;
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};
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int pop_count() const noexcept {
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return popcount;
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};
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2017-08-07 00:20:32 +08:00
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void abandon() noexcept {
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2020-03-31 12:22:46 +08:00
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// L = nullptr;
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2017-08-07 00:20:32 +08:00
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index = 0;
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returncount = 0;
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popcount = 0;
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err = call_status::runtime;
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}
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2016-06-20 05:59:40 +08:00
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~protected_function_result() {
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2021-10-24 06:13:25 +08:00
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if (L == nullptr)
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return;
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2016-06-20 05:59:40 +08:00
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stack::remove(L, index, popcount);
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}
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};
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2017-08-06 07:20:28 +08:00
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namespace stack {
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template <>
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2018-12-23 04:36:42 +08:00
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struct unqualified_pusher<protected_function_result> {
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2017-08-06 07:20:28 +08:00
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static int push(lua_State* L, const protected_function_result& pfr) {
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2022-06-23 04:32:13 +08:00
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#if SOL_IS_ON(SOL_SAFE_STACK_CHECK)
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2018-12-20 12:17:15 +08:00
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luaL_checkstack(L, static_cast<int>(pfr.pop_count()), detail::not_enough_stack_space_generic);
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#endif // make sure stack doesn't overflow
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2017-08-06 07:20:28 +08:00
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int p = 0;
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for (int i = 0; i < pfr.pop_count(); ++i) {
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lua_pushvalue(L, i + pfr.stack_index());
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++p;
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}
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return p;
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}
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};
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2017-09-13 14:46:56 +08:00
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} // namespace stack
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} // namespace sol
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2016-03-03 10:02:12 +08:00
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2016-04-24 06:18:02 +08:00
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#endif // SOL_PROTECTED_FUNCTION_RESULT_HPP
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