From dc2493e7525bb7633f697ef10f72b72b46222249 Mon Sep 17 00:00:00 2001
From: Andy Belle-Isle <drumsetmonkey@gmail.com>
Date: Fri, 30 Aug 2019 00:45:36 -0400
Subject: Forget what I said, I just need to change git attributes to mark for
 vendor

---
 lib/sol2/include/sol/stack_check_unqualified.hpp | 606 +++++++++++++++++++++++
 1 file changed, 606 insertions(+)
 create mode 100644 lib/sol2/include/sol/stack_check_unqualified.hpp

(limited to 'lib/sol2/include/sol/stack_check_unqualified.hpp')

diff --git a/lib/sol2/include/sol/stack_check_unqualified.hpp b/lib/sol2/include/sol/stack_check_unqualified.hpp
new file mode 100644
index 0000000..025961c
--- /dev/null
+++ b/lib/sol2/include/sol/stack_check_unqualified.hpp
@@ -0,0 +1,606 @@
+// 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_STACK_CHECK_UNQUALIFIED_HPP
+#define SOL_STACK_CHECK_UNQUALIFIED_HPP
+
+#include "stack_core.hpp"
+#include "usertype_traits.hpp"
+#include "inheritance.hpp"
+#include <memory>
+#include <functional>
+#include <utility>
+#include <cmath>
+#if defined(SOL_CXX17_FEATURES) && SOL_CXX17_FEATURES
+#include <optional>
+#if defined(SOL_STD_VARIANT) && SOL_STD_VARIANT
+#include <variant>
+#endif // SOL_STD_VARIANT
+#endif // SOL_CXX17_FEATURES
+
+namespace sol { namespace stack {
+	namespace stack_detail {
+		template <typename T, bool poptable = true>
+		inline bool check_metatable(lua_State* L, int index = -2) {
+			const auto& metakey = usertype_traits<T>::metatable();
+			luaL_getmetatable(L, &metakey[0]);
+			const type expectedmetatabletype = static_cast<type>(lua_type(L, -1));
+			if (expectedmetatabletype != type::lua_nil) {
+				if (lua_rawequal(L, -1, index) == 1) {
+					lua_pop(L, 1 + static_cast<int>(poptable));
+					return true;
+				}
+			}
+			lua_pop(L, 1);
+			return false;
+		}
+
+		template <type expected, int (*check_func)(lua_State*, int)>
+		struct basic_check {
+			template <typename Handler>
+			static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+				tracking.use(1);
+				bool success = check_func(L, index) == 1;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, expected, type_of(L, index), "");
+				}
+				return success;
+			}
+		};
+	} // namespace stack_detail
+
+	template <typename T, typename>
+	struct unqualified_interop_checker {
+		template <typename Handler>
+		static bool check(lua_State*, int, type, Handler&&, record&) {
+			return false;
+		}
+	};
+
+	template <typename T, typename>
+	struct qualified_interop_checker {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, type index_type, Handler&& handler, record& tracking) {
+			return stack_detail::unqualified_interop_check<T>(L, index, index_type, std::forward<Handler>(handler), tracking);
+		}
+	};
+
+	template <typename T, type expected, typename>
+	struct unqualified_checker {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			if constexpr (std::is_same_v<T, bool>) {
+				tracking.use(1);
+				bool success = lua_isboolean(L, index) == 1;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, expected, type_of(L, index), "");
+				}
+				return success;
+			}
+			else if constexpr (meta::any_same_v<T, char /* , char8_t*/, char16_t, char32_t>) {
+				return stack::check<std::basic_string<T>>(L, index, std::forward<Handler>(handler), tracking);
+			}
+			else if constexpr (std::is_integral_v<T> || std::is_same_v<T, lua_Integer>) {
+				tracking.use(1);
+#if SOL_LUA_VERSION >= 503
+#if defined(SOL_STRINGS_ARE_NUMBERS) && SOL_STRINGS_ARE_NUMBERS
+				int isnum = 0;
+				lua_tointegerx(L, index, &isnum);
+				const bool success = isnum != 0;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::number, type_of(L, index), detail::not_a_number_or_number_string_integral);
+				}
+#elif (defined(SOL_SAFE_NUMERICS) && SOL_SAFE_NUMERICS) && !(defined(SOL_NO_CHECK_NUMBER_PRECISION) && SOL_NO_CHECK_NUMBER_PRECISION)
+				// this check is precise, does not convert
+				if (lua_isinteger(L, index) == 1) {
+					return true;
+				}
+				const bool success = false;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::number, type_of(L, index), detail::not_a_number_integral);
+				}
+#else
+				type t = type_of(L, index);
+				const bool success = t == type::number;
+#endif // If numbers are enabled, use the imprecise check
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::number, type_of(L, index), detail::not_a_number);
+				}
+				return success;
+#else
+#if !defined(SOL_STRINGS_ARE_NUMBERS) || !SOL_STRINGS_ARE_NUMBERS
+				// must pre-check, because it will convert
+				type t = type_of(L, index);
+				if (t != type::number) {
+					// expected type, actual type
+					handler(L, index, type::number, t, detail::not_a_number);
+					return false;
+				}
+#endif // Do not allow strings to be numbers
+#if (defined(SOL_SAFE_NUMERICS) && SOL_SAFE_NUMERICS) && !(defined(SOL_NO_CHECK_NUMBER_PRECISION) && SOL_NO_CHECK_NUMBER_PRECISION)
+				int isnum = 0;
+				const lua_Number v = lua_tonumberx(L, index, &isnum);
+				const bool success = isnum != 0 && static_cast<lua_Number>(llround(v)) == v;
+#else
+				const bool success = true;
+#endif // Safe numerics and number precision checking
+				if (!success) {
+					// expected type, actual type
+#if defined(SOL_STRINGS_ARE_NUMBERS) && SOL_STRINGS_ARE_NUMBERS
+					handler(L, index, type::number, type_of(L, index), detail::not_a_number_or_number_string);
+#elif (defined(SOL_SAFE_NUMERICS) && SOL_SAFE_NUMERICS)
+					handler(L, index, type::number, t, detail::not_a_number_or_number_string);
+#else
+					handler(L, index, type::number, t, detail::not_a_number);
+#endif
+				}
+				return success;
+#endif // Lua Version 5.3 versus others
+			}
+			else if constexpr (std::is_floating_point_v<T> || std::is_same_v<T, lua_Number>) {
+				tracking.use(1);
+#if defined(SOL_STRINGS_ARE_NUMBERS) && SOL_STRINGS_ARE_NUMBERS
+				bool success = lua_isnumber(L, index) == 1;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::number, type_of(L, index), detail::not_a_number_or_number_string);
+				}
+				return success;
+#else
+				type t = type_of(L, index);
+				bool success = t == type::number;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::number, t, detail::not_a_number);
+				}
+				return success;
+#endif // Strings are Numbers
+			}
+			else if constexpr(meta::any_same_v<T, type, this_state, this_main_state, this_environment, variadic_args>) {
+				(void)L;
+				(void)index;
+				(void)handler;
+				tracking.use(0);
+				return true;
+			}
+			else if constexpr (is_unique_usertype_v<T>) {
+				using proper_T = typename unique_usertype_traits<T>::type;
+				const type indextype = type_of(L, index);
+				tracking.use(1);
+				if (indextype != type::userdata) {
+					handler(L, index, type::userdata, indextype, "value is not a userdata");
+					return false;
+				}
+				if (lua_getmetatable(L, index) == 0) {
+					return true;
+				}
+				int metatableindex = lua_gettop(L);
+				if (stack_detail::check_metatable<detail::unique_usertype<proper_T>>(L, metatableindex)) {
+					void* memory = lua_touserdata(L, index);
+					memory = detail::align_usertype_unique_destructor(memory);
+					detail::unique_destructor& pdx = *static_cast<detail::unique_destructor*>(memory);
+					bool success = &detail::usertype_unique_alloc_destroy<proper_T, T> == pdx;
+					if (!success) {
+						memory = detail::align_usertype_unique_tag<true>(memory);
+#if 0
+						// New version
+#else
+						const char*& name_tag = *static_cast<const char**>(memory);
+						success = usertype_traits<T>::qualified_name() == name_tag;
+#endif
+						if (!success) {
+							handler(L, index, type::userdata, indextype, "value is a userdata but is not the correct unique usertype");
+						}
+					}
+					return success;
+				}
+				lua_pop(L, 1);
+				handler(L, index, type::userdata, indextype, "unrecognized userdata (not pushed by sol?)");
+				return false;
+			}
+			else if constexpr (meta::any_same_v<T, lua_nil_t, 
+#if defined(SOL_CXX_17_FEATURES) && SOL_CXX_17_FEATURES
+				std::nullopt_t,
+#endif
+			nullopt_t>) {
+				bool success = lua_isnil(L, index);
+				if (success) {
+					tracking.use(1);
+					return success;
+				}
+				tracking.use(0);
+				success = lua_isnone(L, index);
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, expected, type_of(L, index), "");
+				}
+				return success;
+			}
+			else if constexpr (std::is_same_v<T, env_key_t>) {
+				tracking.use(1);
+				type t = type_of(L, index);
+				if (t == type::table || t == type::none || t == type::lua_nil || t == type::userdata) {
+					return true;
+				}
+				handler(L, index, type::table, t, "value cannot not have a valid environment");
+				return true;
+			}
+			else if constexpr (std::is_same_v<T, detail::non_lua_nil_t>) {
+				return !stack::unqualified_check<lua_nil_t>(L, index, std::forward<Handler>(handler), tracking);
+			}
+			else if constexpr (meta::is_specialization_of_v<T, basic_lua_table>) {
+				tracking.use(1);
+				type t = type_of(L, index);
+				if (t != type::table) {
+					handler(L, index, type::table, t, "value is not a table");
+					return false;
+				}
+				return true;
+			}
+			else if constexpr (meta::is_specialization_of_v<T, basic_bytecode>) {
+				tracking.use(1);
+				type t = type_of(L, index);
+				if (t != type::function) {
+					handler(L, index, type::function, t, "value is not a function that can be dumped");
+					return false;
+				}
+				return true;
+			}
+			else if constexpr(meta::is_specialization_of_v<T, basic_environment>) {
+				tracking.use(1);
+				if (lua_getmetatable(L, index) == 0) {
+					return true;
+				}
+				type t = type_of(L, -1);
+				if (t == type::table || t == type::none || t == type::lua_nil) {
+					lua_pop(L, 1);
+					return true;
+				}
+				if (t != type::userdata) {
+					lua_pop(L, 1);
+					handler(L, index, type::table, t, "value does not have a valid metatable");
+					return false;
+				}
+				return true;
+			}
+			else if constexpr (std::is_same_v<T, metatable_key_t>) {
+				tracking.use(1);
+				if (lua_getmetatable(L, index) == 0) {
+					return true;
+				}
+				type t = type_of(L, -1);
+				if (t == type::table || t == type::none || t == type::lua_nil) {
+					lua_pop(L, 1);
+					return true;
+				}
+				if (t != type::userdata) {
+					lua_pop(L, 1);
+					handler(L, index, expected, t, "value does not have a valid metatable");
+					return false;
+				}
+				return true;
+			}
+			else if constexpr (expected == type::userdata) {
+				if constexpr (meta::any_same_v<T, userdata_value> || meta::is_specialization_of_v<T, basic_userdata>) {
+					tracking.use(1);
+					type t = type_of(L, index);
+					bool success = t == type::userdata;
+					if (!success) {
+						// expected type, actual type
+						handler(L, index, type::userdata, t, "");
+					}
+					return success;
+				}
+				else if constexpr (meta::is_specialization_of_v<T, user>) {
+					unqualified_checker<lightuserdata_value, type::userdata> c;
+					(void)c;
+					return c.check(L, index, std::forward<Handler>(handler), tracking);
+				}
+				else {
+					if constexpr (std::is_pointer_v<T>) {
+						return check_usertype<T>(L, index, std::forward<Handler>(handler), tracking);
+					}
+					else if constexpr (meta::is_specialization_of_v<T, std::reference_wrapper>) {
+						using T_internal = typename T::type;
+						return stack::check<T_internal>(L, index, std::forward<Handler>(handler), tracking);
+					}
+					else {
+						return check_usertype<T>(L, index, std::forward<Handler>(handler), tracking);
+					}
+				}
+			}
+			else if constexpr (expected == type::poly) {
+				tracking.use(1);
+				bool success = is_lua_reference_v<T> || !lua_isnone(L, index);
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::poly, type_of(L, index), "");
+				}
+				return success;
+			}
+			else if constexpr (expected == type::lightuserdata) {
+				tracking.use(1);
+				type t = type_of(L, index);
+				bool success = t == type::userdata || t == type::lightuserdata;
+				if (!success) {
+					// expected type, actual type
+					handler(L, index, type::lightuserdata, t, "");
+				}
+				return success;
+			}
+			else if constexpr (expected == type::function) {
+				if constexpr (meta::any_same_v<T, lua_CFunction, std::remove_pointer_t<lua_CFunction>, c_closure>) {
+					tracking.use(1);
+					bool success = lua_iscfunction(L, index) == 1;
+					if (!success) {
+						// expected type, actual type
+						handler(L, index, expected, type_of(L, index), "");
+					}
+					return success;
+				}
+				else {
+					tracking.use(1);
+					type t = type_of(L, index);
+					if (t == type::lua_nil || t == type::none || t == type::function) {
+						// allow for lua_nil to be returned
+						return true;
+					}
+					if (t != type::userdata && t != type::table) {
+						handler(L, index, type::function, t, "must be a function or table or a userdata");
+						return false;
+					}
+					// Do advanced check for call-style userdata?
+					static const auto& callkey = to_string(meta_function::call);
+					if (lua_getmetatable(L, index) == 0) {
+						// No metatable, no __call key possible
+						handler(L, index, type::function, t, "value is not a function and does not have overriden metatable");
+						return false;
+					}
+					if (lua_isnoneornil(L, -1)) {
+						lua_pop(L, 1);
+						handler(L, index, type::function, t, "value is not a function and does not have valid metatable");
+						return false;
+					}
+					lua_getfield(L, -1, &callkey[0]);
+					if (lua_isnoneornil(L, -1)) {
+						lua_pop(L, 2);
+						handler(L, index, type::function, t, "value's metatable does not have __call overridden in metatable, cannot call this type");
+						return false;
+					}
+					// has call, is definitely a function
+					lua_pop(L, 2);
+					return true;
+				}
+			}
+			else if constexpr (expected == type::table) {
+				tracking.use(1);
+				type t = type_of(L, index);
+				if (t == type::table) {
+					return true;
+				}
+				if (t != type::userdata) {
+					handler(L, index, type::table, t, "value is not a table or a userdata that can behave like one");
+					return false;
+				}
+				return true;
+			}
+			else {
+				tracking.use(1);
+				const type indextype = type_of(L, index);
+				bool success = expected == indextype;
+				if (!success) {
+					// expected type, actual type, message
+					handler(L, index, expected, indextype, "");
+				}
+				return success;
+			}
+		}
+	};
+
+	template <typename T>
+	struct unqualified_checker<non_null<T>, type::userdata> : unqualified_checker<T, lua_type_of_v<T>> {};
+
+	template <typename T>
+	struct unqualified_checker<detail::as_value_tag<T>, type::userdata> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			const type indextype = type_of(L, index);
+			return check(types<T>(), L, index, indextype, std::forward<Handler>(handler), tracking);
+		}
+
+		template <typename U, typename Handler>
+		static bool check(types<U>, lua_State* L, int index, type indextype, Handler&& handler, record& tracking) {
+			if constexpr (std::is_same_v<T, lightuserdata_value> || std::is_same_v<T, userdata_value> || std::is_same_v<T, userdata> || std::is_same_v<T, lightuserdata>) {
+				tracking.use(1);
+				if (indextype != type::userdata) {
+					handler(L, index, type::userdata, indextype, "value is not a valid userdata");
+					return false;
+				}
+				return true;
+			}
+			else {
+#if defined(SOL_ENABLE_INTEROP) && SOL_ENABLE_INTEROP
+				if (stack_detail::interop_check<U>(L, index, indextype, handler, tracking)) {
+					return true;
+				}
+#endif // interop extensibility
+				tracking.use(1);
+				if (indextype != type::userdata) {
+					handler(L, index, type::userdata, indextype, "value is not a valid userdata");
+					return false;
+				}
+				if (lua_getmetatable(L, index) == 0) {
+					return true;
+				}
+				int metatableindex = lua_gettop(L);
+				if (stack_detail::check_metatable<U>(L, metatableindex))
+					return true;
+				if (stack_detail::check_metatable<U*>(L, metatableindex))
+					return true;
+				if (stack_detail::check_metatable<detail::unique_usertype<U>>(L, metatableindex))
+					return true;
+				if (stack_detail::check_metatable<as_container_t<U>>(L, metatableindex))
+					return true;
+				bool success = false;
+				bool has_derived = derive<T>::value || weak_derive<T>::value;
+				if (has_derived) {
+	#if defined(SOL_SAFE_STACK_CHECK) && SOL_SAFE_STACK_CHECK
+					luaL_checkstack(L, 1, detail::not_enough_stack_space_string);
+	#endif // make sure stack doesn't overflow
+					auto pn = stack::pop_n(L, 1);
+					lua_pushstring(L, &detail::base_class_check_key()[0]);
+					lua_rawget(L, metatableindex);
+					if (type_of(L, -1) != type::lua_nil) {
+						void* basecastdata = lua_touserdata(L, -1);
+						detail::inheritance_check_function ic = reinterpret_cast<detail::inheritance_check_function>(basecastdata);
+						success = ic(usertype_traits<T>::qualified_name());
+					}
+				}
+				lua_pop(L, 1);
+				if (!success) {
+					handler(L, index, type::userdata, indextype, "value at this index does not properly reflect the desired type");
+					return false;
+				}
+				return true;
+			}
+		}
+	};
+
+	template <typename T>
+	struct unqualified_checker<detail::as_pointer_tag<T>, type::userdata> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, type indextype, Handler&& handler, record& tracking) {
+			if (indextype == type::lua_nil) {
+				tracking.use(1);
+				return true;
+			}
+			return check_usertype<std::remove_pointer_t<T>>(L, index, std::forward<Handler>(handler), tracking);
+		}
+
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			const type indextype = type_of(L, index);
+			return check(L, index, indextype, std::forward<Handler>(handler), tracking);
+		}
+	};
+
+	template <typename... Args>
+	struct unqualified_checker<std::tuple<Args...>, type::poly> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			return stack::multi_check<Args...>(L, index, std::forward<Handler>(handler), tracking);
+		}
+	};
+
+	template <typename A, typename B>
+	struct unqualified_checker<std::pair<A, B>, type::poly> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			return stack::multi_check<A, B>(L, index, std::forward<Handler>(handler), tracking);
+		}
+	};
+
+	template <typename T>
+	struct unqualified_checker<optional<T>, type::poly> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&&, record& tracking) {
+			type t = type_of(L, index);
+			if (t == type::none) {
+				tracking.use(0);
+				return true;
+			}
+			if (t == type::lua_nil) {
+				tracking.use(1);
+				return true;
+			}
+			return stack::unqualified_check<T>(L, index, no_panic, tracking);
+		}
+	};
+
+#if defined(SOL_CXX17_FEATURES) && SOL_CXX17_FEATURES
+
+	template <typename T>
+	struct unqualified_checker<std::optional<T>, type::poly> {
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&&, record& tracking) {
+			type t = type_of(L, index);
+			if (t == type::none) {
+				tracking.use(0);
+				return true;
+			}
+			if (t == type::lua_nil) {
+				tracking.use(1);
+				return true;
+			}
+			return stack::check<T>(L, index, no_panic, tracking);
+		}
+	};
+
+#if defined(SOL_STD_VARIANT) && SOL_STD_VARIANT
+
+	template <typename... Tn>
+	struct unqualified_checker<std::variant<Tn...>, type::poly> {
+		typedef std::variant<Tn...> V;
+		typedef std::variant_size<V> V_size;
+		typedef std::integral_constant<bool, V_size::value == 0> V_is_empty;
+
+		template <typename Handler>
+		static bool is_one(std::integral_constant<std::size_t, 0>, lua_State* L, int index, Handler&& handler, record& tracking) {
+			if constexpr (V_is_empty::value) {
+				if (lua_isnone(L, index)) {
+					return true;
+				}
+			}
+			tracking.use(1);
+			handler(L, index, type::poly, type_of(L, index), "value does not fit any type present in the variant");
+			return false;
+		}
+
+		template <std::size_t I, typename Handler>
+		static bool is_one(std::integral_constant<std::size_t, I>, lua_State* L, int index, Handler&& handler, record& tracking) {
+			typedef std::variant_alternative_t<I - 1, V> T;
+			record temp_tracking = tracking;
+			if (stack::check<T>(L, index, no_panic, temp_tracking)) {
+				tracking = temp_tracking;
+				return true;
+			}
+			return is_one(std::integral_constant<std::size_t, I - 1>(), L, index, std::forward<Handler>(handler), tracking);
+		}
+
+		template <typename Handler>
+		static bool check(lua_State* L, int index, Handler&& handler, record& tracking) {
+			return is_one(std::integral_constant<std::size_t, V_size::value>(), L, index, std::forward<Handler>(handler), tracking);
+		}
+	};
+
+#endif // SOL_STD_VARIANT
+
+#endif // SOL_CXX17_FEATURES
+}}     // namespace sol::stack
+
+#endif // SOL_STACK_CHECK_UNQUALIFIED_HPP
-- 
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