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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_ERROR_HANDLER_HPP
#define SOL_ERROR_HANDLER_HPP
#include "types.hpp"
#include "demangle.hpp"
namespace sol {
namespace detail {
constexpr const char* not_a_number = "not a numeric type";
constexpr const char* not_a_number_or_number_string = "not a numeric type or numeric string";
constexpr const char* not_a_number_integral = "not a numeric type that fits exactly an integer (has significant decimals)";
constexpr const char* not_a_number_or_number_string_integral
= "not a numeric type or a numeric string that fits exactly an integer (has significant decimals)";
constexpr const char* not_enough_stack_space = "not enough space left on Lua stack";
constexpr const char* not_enough_stack_space_floating = "not enough space left on Lua stack for a floating point number";
constexpr const char* not_enough_stack_space_integral = "not enough space left on Lua stack for an integral number";
constexpr const char* not_enough_stack_space_string = "not enough space left on Lua stack for a string";
constexpr const char* not_enough_stack_space_meta_function_name = "not enough space left on Lua stack for the name of a meta_function";
constexpr const char* not_enough_stack_space_userdata = "not enough space left on Lua stack to create a sol3 userdata";
constexpr const char* not_enough_stack_space_generic = "not enough space left on Lua stack to push valuees";
constexpr const char* not_enough_stack_space_environment = "not enough space left on Lua stack to retrieve environment";
constexpr const char* protected_function_error = "caught (...) unknown error during protected_function call";
inline void accumulate_and_mark(const std::string& n, std::string& addendum, int& marker) {
if (marker > 0) {
addendum += ", ";
}
addendum += n;
++marker;
}
}
inline std::string associated_type_name(lua_State* L, int index, type t) {
switch (t) {
case type::poly:
return "anything";
case type::userdata:
{
#if defined(SOL_SAFE_STACK_CHECK) && SOL_SAFE_STACK_CHECK
luaL_checkstack(L, 2, "not enough space to push get the type name");
#endif // make sure stack doesn't overflow
if (lua_getmetatable(L, index) == 0) {
break;
}
lua_pushlstring(L, "__name", 6);
lua_rawget(L, -2);
size_t sz;
const char* name = lua_tolstring(L, -1, &sz);
std::string tn(name, static_cast<std::string::size_type>(sz));
lua_pop(L, 2);
return tn;
}
default:
break;
}
return lua_typename(L, static_cast<int>(t));
}
inline int type_panic_string(lua_State* L, int index, type expected, type actual, const std::string& message = "") noexcept(false) {
const char* err = message.empty() ? "stack index %d, expected %s, received %s" : "stack index %d, expected %s, received %s: %s";
std::string actualname = associated_type_name(L, index, actual);
return luaL_error(L, err, index,
expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected)),
actualname.c_str(),
message.c_str());
}
inline int type_panic_c_str(lua_State* L, int index, type expected, type actual, const char* message = nullptr) noexcept(false) {
const char* err = message == nullptr || (std::char_traits<char>::length(message) == 0) ? "stack index %d, expected %s, received %s" : "stack index %d, expected %s, received %s: %s";
std::string actualname = associated_type_name(L, index, actual);
return luaL_error(L, err, index,
expected == type::poly ? "anything" : lua_typename(L, static_cast<int>(expected)),
actualname.c_str(),
message);
}
struct type_panic_t {
int operator()(lua_State* L, int index, type expected, type actual) const noexcept(false) {
return type_panic_c_str(L, index, expected, actual, nullptr);
}
int operator()(lua_State* L, int index, type expected, type actual, const char* message) const noexcept(false) {
return type_panic_c_str(L, index, expected, actual, message);
}
int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
return type_panic_string(L, index, expected, actual, message);
}
};
const type_panic_t type_panic = {};
struct constructor_handler {
int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
std::string str = "(type check failed in constructor)";
return type_panic_string(L, index, expected, actual, message.empty() ? str : message + " " + str);
}
};
template <typename F = void>
struct argument_handler {
int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
std::string str = "(bad argument to variable or function call)";
return type_panic_string(L, index, expected, actual, message.empty() ? str : message + " " + str );
}
};
template <typename R, typename... Args>
struct argument_handler<types<R, Args...>> {
int operator()(lua_State* L, int index, type expected, type actual, const std::string& message) const noexcept(false) {
std::string addendum = "(bad argument into '";
addendum += detail::demangle<R>();
addendum += "(";
int marker = 0;
(void)detail::swallow{int(), (detail::accumulate_and_mark(detail::demangle<Args>(), addendum, marker), int())...};
addendum += ")')";
return type_panic_string(L, index, expected, actual, message.empty() ? addendum : message + " " + addendum);
}
};
// Specify this function as the handler for lua::check if you know there's nothing wrong
inline int no_panic(lua_State*, int, type, type, const char* = nullptr) noexcept {
return 0;
}
inline void type_error(lua_State* L, int expected, int actual) noexcept(false) {
luaL_error(L, "expected %s, received %s", lua_typename(L, expected), lua_typename(L, actual));
}
inline void type_error(lua_State* L, type expected, type actual) noexcept(false) {
type_error(L, static_cast<int>(expected), static_cast<int>(actual));
}
inline void type_assert(lua_State* L, int index, type expected, type actual) noexcept(false) {
if (expected != type::poly && expected != actual) {
type_panic_c_str(L, index, expected, actual, nullptr);
}
}
inline void type_assert(lua_State* L, int index, type expected) {
type actual = type_of(L, index);
type_assert(L, index, expected, actual);
}
} // namespace sol
#endif // SOL_ERROR_HANDLER_HPP
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