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90 lines
3.8 KiB
C++
90 lines
3.8 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2021 Rapptz, ThePhD and contributors
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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_STACK_CHECK_QUALIFIED_HPP
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#define SOL_STACK_CHECK_QUALIFIED_HPP
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#include <sol/stack_check_unqualified.hpp>
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namespace sol { namespace stack {
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template <typename X, type expected, typename>
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struct qualified_checker {
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template <typename Handler>
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static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
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using no_cv_X = meta::unqualified_t<X>;
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if constexpr (!std::is_reference_v<X> && is_unique_usertype_v<no_cv_X>) {
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using element = unique_usertype_element_t<no_cv_X>;
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if constexpr (is_actual_type_rebindable_for_v<no_cv_X>) {
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using rebound_actual_type = unique_usertype_rebind_actual_t<no_cv_X>;
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// we have a unique pointer type that can be
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// rebound to a base/derived type
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const type indextype = type_of(L, index);
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tracking.use(1);
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if (indextype != type::userdata) {
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handler(L, index, type::userdata, indextype, "value is not a userdata");
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return false;
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}
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void* memory = lua_touserdata(L, index);
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memory = detail::align_usertype_unique_destructor(memory);
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detail::unique_destructor& pdx = *static_cast<detail::unique_destructor*>(memory);
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if (&detail::usertype_unique_alloc_destroy<element, no_cv_X> == pdx) {
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return true;
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}
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if constexpr (derive<element>::value) {
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memory = detail::align_usertype_unique_tag<true, false>(memory);
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detail::unique_tag& ic = *reinterpret_cast<detail::unique_tag*>(memory);
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string_view ti = usertype_traits<element>::qualified_name();
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string_view rebind_ti = usertype_traits<rebound_actual_type>::qualified_name();
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if (ic(nullptr, nullptr, ti, rebind_ti) != 0) {
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return true;
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}
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}
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handler(L, index, type::userdata, indextype, "value is a userdata but is not the correct unique usertype");
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return false;
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}
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else {
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return stack::unqualified_check<X>(L, index, std::forward<Handler>(handler), tracking);
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}
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}
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else if constexpr (!std::is_reference_v<X> && is_container_v<no_cv_X>) {
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if (type_of(L, index) == type::userdata) {
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return stack::unqualified_check<X>(L, index, std::forward<Handler>(handler), tracking);
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}
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else {
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return stack::unqualified_check<nested<X>>(L, index, std::forward<Handler>(handler), tracking);
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}
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}
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else if constexpr (!std::is_reference_v<X> && meta::is_specialization_of_v<X, nested>) {
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using NestedX = typename meta::unqualified_t<X>::nested_type;
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return stack::check<NestedX>(L, index, ::std::forward<Handler>(handler), tracking);
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}
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else {
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return stack::unqualified_check<X>(L, index, std::forward<Handler>(handler), tracking);
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}
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}
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};
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}} // namespace sol::stack
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#endif // SOL_STACK_CHECK_HPP
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