176 lines
7.3 KiB
C++
176 lines
7.3 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2022 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_ERROR_HANDLER_HPP
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#define SOL_ERROR_HANDLER_HPP
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#include <sol/types.hpp>
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#include <sol/demangle.hpp>
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#include <cstdio>
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namespace sol {
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namespace detail {
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constexpr const char* not_a_number = "not a numeric type";
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constexpr const char* not_a_number_or_number_string = "not a numeric type or numeric string";
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constexpr const char* not_a_number_integral = "not a numeric type that fits exactly an integer (number maybe has significant decimals)";
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constexpr const char* not_a_number_or_number_string_integral
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= "not a numeric type or a numeric string that fits exactly an integer (e.g. number maybe has significant decimals)";
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constexpr const char* not_enough_stack_space = "not enough space left on Lua stack";
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constexpr const char* not_enough_stack_space_floating = "not enough space left on Lua stack for a floating point number";
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constexpr const char* not_enough_stack_space_integral = "not enough space left on Lua stack for an integral number";
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constexpr const char* not_enough_stack_space_string = "not enough space left on Lua stack for a string";
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constexpr const char* not_enough_stack_space_meta_function_name = "not enough space left on Lua stack for the name of a meta_function";
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constexpr const char* not_enough_stack_space_userdata = "not enough space left on Lua stack to create a sol2 userdata";
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constexpr const char* not_enough_stack_space_generic = "not enough space left on Lua stack to push valuees";
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constexpr const char* not_enough_stack_space_environment = "not enough space left on Lua stack to retrieve environment";
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constexpr const char* protected_function_error = "caught (...) unknown error during protected_function call";
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inline void accumulate_and_mark(const std::string& n, std::string& aux_message, int& marker) {
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if (marker > 0) {
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aux_message += ", ";
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}
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aux_message += n;
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++marker;
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}
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} // namespace detail
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inline std::string associated_type_name(lua_State* L, int index, type t) {
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switch (t) {
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case type::poly:
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return "anything";
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case type::userdata: {
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#if SOL_IS_ON(SOL_SAFE_STACK_CHECK)
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luaL_checkstack(L, 2, "not enough space to push get the type name");
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#endif // make sure stack doesn't overflow
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if (lua_getmetatable(L, index) == 0) {
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break;
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}
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lua_pushlstring(L, "__name", 6);
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lua_rawget(L, -2);
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size_t sz;
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const char* name = lua_tolstring(L, -1, &sz);
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std::string tn(name, static_cast<std::string::size_type>(sz));
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lua_pop(L, 2);
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return tn;
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}
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default:
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break;
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}
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return lua_typename(L, static_cast<int>(t));
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}
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inline int push_type_panic_string(lua_State* L, int index, type expected, type actual, string_view message, string_view aux_message) noexcept {
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const char* err = message.size() == 0
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? (aux_message.size() == 0 ? "stack index %d, expected %s, received %s" : "stack index %d, expected %s, received %s: %s%s")
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: "stack index %d, expected %s, received %s: %s %s";
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const char* type_name = expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected));
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{
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std::string actual_name = associated_type_name(L, index, actual);
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lua_pushfstring(L, err, index, type_name, actual_name.c_str(), message.data(), aux_message.data());
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}
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return 1;
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}
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inline int type_panic_string(lua_State* L, int index, type expected, type actual, string_view message = "") noexcept(false) {
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push_type_panic_string(L, index, expected, actual, message, "");
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return lua_error(L);
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}
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inline int type_panic_c_str(lua_State* L, int index, type expected, type actual, const char* message = nullptr) noexcept(false) {
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push_type_panic_string(L, index, expected, actual, message == nullptr ? "" : message, "");
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return lua_error(L);
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}
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struct type_panic_t {
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int operator()(lua_State* L, int index, type expected, type actual) const noexcept(false) {
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return type_panic_c_str(L, index, expected, actual, nullptr);
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}
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int operator()(lua_State* L, int index, type expected, type actual, string_view message) const noexcept(false) {
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return type_panic_c_str(L, index, expected, actual, message.data());
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}
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};
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const type_panic_t type_panic = {};
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struct constructor_handler {
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int operator()(lua_State* L, int index, type expected, type actual, string_view message) const noexcept(false) {
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push_type_panic_string(L, index, expected, actual, message, "(type check failed in constructor)");
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return lua_error(L);
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}
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};
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template <typename F = void>
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struct argument_handler {
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int operator()(lua_State* L, int index, type expected, type actual, string_view message) const noexcept(false) {
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push_type_panic_string(L, index, expected, actual, message, "(bad argument to variable or function call)");
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return lua_error(L);
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}
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};
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template <typename R, typename... Args>
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struct argument_handler<types<R, Args...>> {
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int operator()(lua_State* L, int index, type expected, type actual, string_view message) const noexcept(false) {
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{
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std::string aux_message = "(bad argument into '";
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aux_message += detail::demangle<R>();
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aux_message += "(";
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int marker = 0;
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(void)detail::swallow { int(), (detail::accumulate_and_mark(detail::demangle<Args>(), aux_message, marker), int())... };
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aux_message += ")')";
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push_type_panic_string(L, index, expected, actual, message, aux_message);
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}
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return lua_error(L);
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}
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};
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// Specify this function as the handler for lua::check if you know there's nothing wrong
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inline int no_panic(lua_State*, int, type, type, const char* = nullptr) noexcept {
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return 0;
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}
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inline void type_error(lua_State* L, int expected, int actual) noexcept(false) {
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luaL_error(L, "expected %s, received %s", lua_typename(L, expected), lua_typename(L, actual));
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}
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inline void type_error(lua_State* L, type expected, type actual) noexcept(false) {
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type_error(L, static_cast<int>(expected), static_cast<int>(actual));
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}
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inline void type_assert(lua_State* L, int index, type expected, type actual) noexcept(false) {
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if (expected != type::poly && expected != actual) {
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type_panic_c_str(L, index, expected, actual, nullptr);
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}
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}
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inline void type_assert(lua_State* L, int index, type expected) {
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type actual = type_of(L, index);
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type_assert(L, index, expected, actual);
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}
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} // namespace sol
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#endif // SOL_ERROR_HANDLER_HPP
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