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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_PROTECTED_FUNCTION_RESULT_HPP
#define SOL_PROTECTED_FUNCTION_RESULT_HPP
#include "reference.hpp"
#include "tuple.hpp"
#include "stack.hpp"
#include "proxy_base.hpp"
#include "stack_iterator.hpp"
#include "stack_proxy.hpp"
#include "error.hpp"
#include "stack.hpp"
#include <cstdint>
namespace sol {
struct protected_function_result : public proxy_base<protected_function_result> {
private:
lua_State* L;
int index;
int returncount;
int popcount;
call_status err;
template <typename T>
decltype(auto) tagged_get(types<optional<T>>, int index_offset) const {
typedef decltype(stack::get<optional<T>>(L, index)) ret_t;
int target = index + index_offset;
if (!valid()) {
return ret_t(nullopt);
}
return stack::get<optional<T>>(L, target);
}
template <typename T>
decltype(auto) tagged_get(types<T>, int index_offset) const {
int target = index + index_offset;
#if defined(SOL_SAFE_PROXIES) && SOL_SAFE_PROXIES
if (!valid()) {
type t = type_of(L, target);
type_panic_c_str(L, target, t, type::none, "bad get from protected_function_result (is not an error)");
}
#endif // Check Argument Safety
return stack::get<T>(L, target);
}
optional<error> tagged_get(types<optional<error>>, int index_offset) const {
int target = index + index_offset;
if (valid()) {
return nullopt;
}
return error(detail::direct_error, stack::get<std::string>(L, target));
}
error tagged_get(types<error>, int index_offset) const {
int target = index + index_offset;
#if defined(SOL_SAFE_PROXIES) && SOL_SAFE_PROXIES
if (valid()) {
type t = type_of(L, target);
type_panic_c_str(L, target, t, type::none, "bad get from protected_function_result (is an error)");
}
#endif // Check Argument Safety
return error(detail::direct_error, stack::get<std::string>(L, target));
}
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;
protected_function_result() = default;
protected_function_result(lua_State* Ls, int idx = -1, int retnum = 0, int popped = 0, call_status pferr = call_status::ok) noexcept
: L(Ls), index(idx), returncount(retnum), popcount(popped), err(pferr) {
}
protected_function_result(const protected_function_result&) = default;
protected_function_result& operator=(const protected_function_result&) = default;
protected_function_result(protected_function_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.abandon();
}
protected_function_result& operator=(protected_function_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.abandon();
return *this;
}
protected_function_result(const unsafe_function_result& o) = delete;
protected_function_result& operator=(const unsafe_function_result& o) = delete;
protected_function_result(unsafe_function_result&& o) noexcept;
protected_function_result& operator=(unsafe_function_result&& o) noexcept;
call_status status() const noexcept {
return err;
}
bool valid() const noexcept {
return status() == call_status::ok || status() == call_status::yielded;
}
template <typename T>
decltype(auto) get(int index_offset = 0) const {
return tagged_get(types<meta::unqualified_t<T>>(), 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());
}
lua_State* lua_state() const noexcept {
return L;
};
int stack_index() const noexcept {
return index;
};
int return_count() const noexcept {
return returncount;
};
int pop_count() const noexcept {
return popcount;
};
void abandon() noexcept {
//L = nullptr;
index = 0;
returncount = 0;
popcount = 0;
err = call_status::runtime;
}
~protected_function_result() {
stack::remove(L, index, popcount);
}
};
namespace stack {
template <>
struct unqualified_pusher<protected_function_result> {
static int push(lua_State* L, const protected_function_result& pfr) {
#if defined(SOL_SAFE_STACK_CHECK) && SOL_SAFE_STACK_CHECK
luaL_checkstack(L, static_cast<int>(pfr.pop_count()), detail::not_enough_stack_space_generic);
#endif // make sure stack doesn't overflow
int p = 0;
for (int i = 0; i < pfr.pop_count(); ++i) {
lua_pushvalue(L, i + pfr.stack_index());
++p;
}
return p;
}
};
} // namespace stack
} // namespace sol
#endif // SOL_PROTECTED_FUNCTION_RESULT_HPP
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