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Allow custom number types to be used
The previous type traits were not possible to extend with custom types, as attempting to do so is undefined behavior.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| __ _____ _____ _____ | ||
| __| | __| | | | JSON for Modern C++ (test suite) | ||
| | | |__ | | | | | | version 3.10.5 | ||
| |_____|_____|_____|_|___| https://github.com/nlohmann/json | ||
| Licensed under the MIT License <http://opensource.org/licenses/MIT>. | ||
| SPDX-License-Identifier: MIT | ||
| Copyright (c) 2013-2022 Niels Lohmann <http://nlohmann.me>. | ||
| 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. | ||
| */ | ||
|
|
||
| #include "doctest_compatibility.h" | ||
|
|
||
| #include <nlohmann/json.hpp> | ||
| using nlohmann::json; | ||
|
|
||
| /// A wrapped integer | ||
| template<typename T> | ||
| class wrapped_int | ||
| { | ||
| public: | ||
| T val; | ||
| operator T() const | ||
| { | ||
| return val; | ||
| } | ||
| wrapped_int() = default; | ||
| wrapped_int(T val) : val(val) {} | ||
|
|
||
| bool operator==(const wrapped_int& other) const | ||
| { | ||
| return static_cast<T>(*this) == static_cast<T>(other); | ||
| } | ||
| bool operator<(const int& other) const | ||
| { | ||
| return static_cast<T>(*this) < other; | ||
| } | ||
| wrapped_int operator+(const wrapped_int& other) const | ||
| { | ||
| return static_cast<T>(*this) + static_cast<T>(other); | ||
| } | ||
| bool operator%(const wrapped_int& other) const | ||
| { | ||
| return static_cast<T>(*this) % static_cast<T>(other.val); | ||
| } | ||
| wrapped_int& operator/=(const wrapped_int& other) | ||
| { | ||
| if (val != nullptr) | ||
| { | ||
| *val /= static_cast<T>(other.val); | ||
| } | ||
| return *this; | ||
| } | ||
| bool operator<(const wrapped_int& other) const | ||
| { | ||
| return static_cast<T>(*this) < static_cast<T>(other.val); | ||
| } | ||
| bool operator<=(const wrapped_int& other) const | ||
| { | ||
| return static_cast<T>(*this) <= static_cast<T>(other.val); | ||
| } | ||
|
|
||
| friend void swap(wrapped_int& self, wrapped_int& other) | ||
| { | ||
| swap(self.val, other.val); | ||
| } | ||
| }; | ||
|
|
||
| template<typename T> class std::numeric_limits<wrapped_int<T>> | ||
| { | ||
| public: | ||
| static constexpr bool is_signed = std::numeric_limits<T>::is_signed; | ||
| static constexpr bool is_integer = std::numeric_limits<T>::is_integer; | ||
| static constexpr bool is_specialized = std::numeric_limits<T>::is_specialized; | ||
| }; | ||
|
|
||
| TEST_CASE("custom integer types") | ||
| { | ||
| using json = nlohmann::basic_json < | ||
| std::map, std::vector, std::string, bool, | ||
| wrapped_int<std::int64_t>, wrapped_int<std::uint64_t>, double, std::allocator >; | ||
| std::string data = "[1,2,-3,-4]"; | ||
| json as_json = json::parse(data.begin(), data.end()); | ||
| wrapped_int<std::uint64_t> i1 = as_json[1]; | ||
| wrapped_int<std::int64_t> i2 = as_json[2]; | ||
| CHECK(i1 == wrapped_int<std::uint64_t>(2)); | ||
| CHECK(i2 == wrapped_int<std::int64_t>(-3)); | ||
| } |