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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_UNSAFE_FUNCTION_RESULT_HPP
#define SOL_UNSAFE_FUNCTION_RESULT_HPP
#include <sol/reference.hpp>
#include <sol/tuple.hpp>
#include <sol/stack.hpp>
#include <sol/proxy_base.hpp>
#include <sol/stack_iterator.hpp>
#include <sol/stack_proxy.hpp>
#include <cstdint>
namespace sol {
struct unsafe_function_result : public proxy_base<unsafe_function_result> {
private:
lua_State* L;
int index;
int returncount;
public:
typedef stack_proxy reference_type;
typedef stack_proxy value_type;
typedef stack_proxy* pointer;
typedef std::ptrdiff_t difference_type;
typedef std::size_t size_type;
typedef stack_iterator<stack_proxy, false> iterator;
typedef stack_iterator<stack_proxy, true> const_iterator;
typedef std::reverse_iterator<iterator> reverse_iterator;
typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
unsafe_function_result() noexcept : unsafe_function_result(nullptr) {}
unsafe_function_result(lua_State* Ls, int idx = -1, int retnum = 0) noexcept : L(Ls), index(idx), returncount(retnum) {
}
// 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.)
unsafe_function_result(const unsafe_function_result&) = delete;
unsafe_function_result& operator=(const unsafe_function_result&) = delete;
unsafe_function_result(unsafe_function_result&& o) noexcept : L(o.L), index(o.index), returncount(o.returncount) {
// Must be manual, otherwise destructor will screw us
// return count being 0 is enough to keep things clean
// but will be thorough
o.abandon();
}
unsafe_function_result& operator=(unsafe_function_result&& o) noexcept {
L = o.L;
index = o.index;
returncount = o.returncount;
// Must be manual, otherwise destructor will screw us
// return count being 0 is enough to keep things clean
// but will be thorough
o.abandon();
return *this;
}
unsafe_function_result(const protected_function_result& o) = delete;
unsafe_function_result& operator=(const protected_function_result& o) = delete;
unsafe_function_result(protected_function_result&& o) noexcept;
unsafe_function_result& operator=(protected_function_result&& o) noexcept;
template <typename T>
decltype(auto) get(difference_type index_offset = 0) const {
return stack::get<T>(L, index + static_cast<int>(index_offset));
}
type get_type(difference_type index_offset = 0) const noexcept {
return type_of(L, index + static_cast<int>(index_offset));
}
stack_proxy operator[](difference_type index_offset) const {
return stack_proxy(L, index + static_cast<int>(index_offset));
}
iterator begin() {
return iterator(L, index, stack_index() + return_count());
}
iterator end() {
return iterator(L, stack_index() + return_count(), stack_index() + return_count());
}
const_iterator begin() const {
return const_iterator(L, index, stack_index() + return_count());
}
const_iterator end() const {
return const_iterator(L, stack_index() + return_count(), stack_index() + return_count());
}
const_iterator cbegin() const {
return begin();
}
const_iterator cend() const {
return end();
}
reverse_iterator rbegin() {
return std::reverse_iterator<iterator>(begin());
}
reverse_iterator rend() {
return std::reverse_iterator<iterator>(end());
}
const_reverse_iterator rbegin() const {
return std::reverse_iterator<const_iterator>(begin());
}
const_reverse_iterator rend() const {
return std::reverse_iterator<const_iterator>(end());
}
const_reverse_iterator crbegin() const {
return std::reverse_iterator<const_iterator>(cbegin());
}
const_reverse_iterator crend() const {
return std::reverse_iterator<const_iterator>(cend());
}
call_status status() const noexcept {
return call_status::ok;
}
bool valid() const noexcept {
return status() == call_status::ok || status() == call_status::yielded;
}
lua_State* lua_state() const {
return L;
};
int stack_index() const {
return index;
};
int return_count() const {
return returncount;
};
void abandon() noexcept {
// L = nullptr;
index = 0;
returncount = 0;
}
~unsafe_function_result() {
if (L != nullptr) {
lua_pop(L, returncount);
}
}
};
namespace stack {
template <>
struct unqualified_pusher<unsafe_function_result> {
static int push(lua_State* L, const unsafe_function_result& fr) {
int p = 0;
for (int i = 0; i < fr.return_count(); ++i) {
lua_pushvalue(L, i + fr.stack_index());
++p;
}
return p;
}
};
} // namespace stack
} // namespace sol
#endif // SOL_UNSAFE_FUNCTION_RESULT_HPP
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