BlackMATov/enum.hpp
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add generic api

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This commit is contained in:
Matvey Cherevko
2019-11-22 09:11:00 +07:00
parent 6871fcc686
commit 106dac17d7
2 changed files with 197 additions and 11 deletions
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113
headers/enum.hpp/enum.hpp
View File

@@ -6,6 +6,7 @@
#pragma once
#include <array>
#include <optional>
#include <stdexcept>
#include <string_view>
@@ -23,6 +24,98 @@ namespace enum_hpp
};
}
namespace enum_hpp
{
template < typename Enum >
struct traits;
template < typename Enum >
using traits_t = typename traits<Enum>::type;
template < typename Enum >
using underlying_type = typename traits_t<Enum>::underlying_type;
template < typename Enum >
constexpr std::size_t size() noexcept {
return traits_t<Enum>::size;
}
template < typename Enum >
constexpr const std::array<Enum, size<Enum>()>& values() noexcept {
return traits_t<Enum>::values;
}
template < typename Enum >
constexpr const std::array<std::string_view, size<Enum>()>& names() noexcept {
return traits_t<Enum>::names;
}
template < typename Enum >
constexpr typename traits_t<Enum>::underlying_type to_underlying(Enum e) noexcept {
return traits_t<Enum>::to_underlying(e);
}
template < typename Enum >
constexpr std::optional<std::string_view> to_string(Enum e) noexcept {
return traits_t<Enum>::to_string(e);
}
template < typename Enum >
constexpr std::string_view to_string_or_empty(Enum e) noexcept {
return traits_t<Enum>::to_string_or_empty(e);
}
template < typename Enum >
std::string_view to_string_or_throw(Enum e) {
return traits_t<Enum>::to_string_or_throw(e);
}
template < typename Enum >
constexpr std::optional<Enum> from_string(std::string_view name) noexcept {
return traits_t<Enum>::from_string(name);
}
template < typename Enum >
constexpr Enum from_string_or_default(std::string_view name, Enum def) noexcept {
return traits_t<Enum>::from_string_or_default(name, def);
}
template < typename Enum >
Enum from_string_or_throw(std::string_view name) {
return traits_t<Enum>::from_string_or_throw(name);
}
template < typename Enum >
constexpr std::optional<std::size_t> to_index(Enum e) noexcept {
return traits_t<Enum>::to_index(e);
}
template < typename Enum >
constexpr std::size_t to_index_or_invalid(Enum e) noexcept {
return traits_t<Enum>::to_index_or_invalid(e);
}
template < typename Enum >
std::size_t to_index_or_throw(Enum e) {
return traits_t<Enum>::to_index_or_throw(e);
}
template < typename Enum >
constexpr std::optional<Enum> from_index(std::size_t index) noexcept {
return traits_t<Enum>::from_index(index);
}
template < typename Enum >
constexpr Enum from_index_or_default(std::size_t index, Enum def) noexcept {
return traits_t<Enum>::from_index_or_default(index, def);
}
template < typename Enum >
Enum from_index_or_throw(std::size_t index) {
return traits_t<Enum>::from_index_or_throw(index);
}
}
namespace enum_hpp::detail
{
template < typename Enum >
@@ -122,8 +215,14 @@ namespace enum_hpp::detail
public:\
using underlying_type = std::underlying_type_t<Enum>;\
static constexpr std::size_t size = ENUM_HPP_PP_SEQ_SIZE(Fields);\
static constexpr const Enum values[] = { ENUM_HPP_GENERATE_VALUES(Enum, Fields) };\
static constexpr const std::string_view names[] = { ENUM_HPP_GENERATE_NAMES(Fields) };\
\
static constexpr const std::array<Enum, size> values = {\
ENUM_HPP_GENERATE_VALUES(Enum, Fields)\
};\
\
static constexpr const std::array<std::string_view, size> names = {\
ENUM_HPP_GENERATE_NAMES(Fields)\
};\
public:\
static constexpr underlying_type to_underlying(Enum e) noexcept {\
return static_cast<underlying_type>(e);\
@@ -213,6 +312,16 @@ namespace enum_hpp::detail
}\
};
//
// ENUM_HPP_REGISTER_TRAITS
//
#define ENUM_HPP_REGISTER_TRAITS(Enum)\
template <>\
struct enum_hpp::traits<Enum> {\
using type = Enum##_traits;\
};
// -----------------------------------------------------------------------------
//
// ENUM_HPP_PP

95
untests/enum_tests.cpp
View File

@@ -55,6 +55,9 @@ namespace some_namespace
(_221)(_222)(_223)(_224)(_225)(_226)(_227)(_228)(_229)(_230)(_231)(_232)(_233)(_234)(_235)(_236)(_237)(_238)(_239)(_240))
}
ENUM_HPP_REGISTER_TRAITS(some_namespace::color)
ENUM_HPP_REGISTER_TRAITS(some_namespace::numbers)
TEST_CASE("enum") {
namespace sn = some_namespace;
@@ -64,6 +67,14 @@ TEST_CASE("enum") {
std::underlying_type_t<sn::color>,
unsigned>);
STATIC_REQUIRE(std::is_same_v<
sn::color_traits::underlying_type,
enum_hpp::underlying_type<sn::color>>);
STATIC_REQUIRE(std::is_same_v<
sn::color_traits,
enum_hpp::traits_t<sn::color>>);
REQUIRE(enum_to_underlying(sn::color::red) == 2u);
REQUIRE(enum_to_underlying(sn::color::green) == 3u);
REQUIRE(enum_to_underlying(sn::color::blue) == 6u);
@@ -83,6 +94,14 @@ TEST_CASE("enum") {
std::underlying_type_t<sn::numbers>,
int>);
STATIC_REQUIRE(std::is_same_v<
sn::numbers_traits::underlying_type,
enum_hpp::underlying_type<sn::numbers>>);
STATIC_REQUIRE(std::is_same_v<
sn::numbers_traits,
enum_hpp::traits_t<sn::numbers>>);
REQUIRE(enum_to_underlying(sn::_0) == 0);
REQUIRE(enum_to_underlying(sn::_100) == 100);
REQUIRE(enum_to_underlying(sn::_240) == 240);
@@ -91,19 +110,29 @@ TEST_CASE("enum") {
SECTION("size") {
{
REQUIRE(sn::color_traits::size == 3u);
REQUIRE(sn::color_traits::size == std::size(sn::color_traits::names));
REQUIRE(sn::color_traits::size == std::size(sn::color_traits::values));
STATIC_REQUIRE(sn::color_traits::size == 3u);
STATIC_REQUIRE(sn::color_traits::size == std::size(sn::color_traits::names));
STATIC_REQUIRE(sn::color_traits::size == std::size(sn::color_traits::values));
STATIC_REQUIRE(enum_hpp::size<sn::color>() == 3u);
STATIC_REQUIRE(enum_hpp::traits_t<sn::color>::size == 3u);
STATIC_REQUIRE(std::size(enum_hpp::names<sn::color>()) == 3u);
STATIC_REQUIRE(std::size(enum_hpp::values<sn::color>()) == 3u);
}
{
REQUIRE(sn::render::mask_traits::size == 4u);
REQUIRE(sn::render::mask_traits::size == std::size(sn::render::mask_traits::names));
REQUIRE(sn::render::mask_traits::size == std::size(sn::render::mask_traits::values));
STATIC_REQUIRE(sn::render::mask_traits::size == 4u);
STATIC_REQUIRE(sn::render::mask_traits::size == std::size(sn::render::mask_traits::names));
STATIC_REQUIRE(sn::render::mask_traits::size == std::size(sn::render::mask_traits::values));
}
{
REQUIRE(sn::numbers_traits::size == 241u);
REQUIRE(sn::numbers_traits::size == std::size(sn::numbers_traits::names));
REQUIRE(sn::numbers_traits::size == std::size(sn::numbers_traits::values));
STATIC_REQUIRE(sn::numbers_traits::size == 241u);
STATIC_REQUIRE(sn::numbers_traits::size == std::size(sn::numbers_traits::names));
STATIC_REQUIRE(sn::numbers_traits::size == std::size(sn::numbers_traits::values));
STATIC_REQUIRE(enum_hpp::size<sn::numbers>() == 241u);
STATIC_REQUIRE(enum_hpp::traits_t<sn::numbers>::size == 241u);
STATIC_REQUIRE(std::size(enum_hpp::names<sn::numbers>()) == 241u);
STATIC_REQUIRE(std::size(enum_hpp::values<sn::numbers>()) == 241u);
}
}
@@ -113,6 +142,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE(sn::color_traits::to_underlying(sn::color::green) == enum_to_underlying(sn::color::green));
STATIC_REQUIRE(sn::color_traits::to_underlying(sn::color::blue) == enum_to_underlying(sn::color::blue));
STATIC_REQUIRE(sn::color_traits::to_underlying(sn::color(42)) == 42);
STATIC_REQUIRE(enum_hpp::to_underlying(sn::color::red) == enum_to_underlying(sn::color::red));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::color::green) == enum_to_underlying(sn::color::green));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::color::blue) == enum_to_underlying(sn::color::blue));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::color(42)) == 42);
}
{
STATIC_REQUIRE(sn::render::mask_traits::to_underlying(sn::render::mask::none) == enum_to_underlying(sn::render::mask::none));
@@ -125,6 +159,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE(sn::numbers_traits::to_underlying(sn::_180) == enum_to_underlying(sn::_180));
STATIC_REQUIRE(sn::numbers_traits::to_underlying(sn::_240) == enum_to_underlying(sn::_240));
STATIC_REQUIRE(sn::numbers_traits::to_underlying(sn::numbers(100500)) == 100500);
STATIC_REQUIRE(enum_hpp::to_underlying(sn::_0) == enum_to_underlying(sn::_0));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::_180) == enum_to_underlying(sn::_180));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::_240) == enum_to_underlying(sn::_240));
STATIC_REQUIRE(enum_hpp::to_underlying(sn::numbers(100500)) == 100500);
}
}
@@ -145,6 +184,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::color_traits::to_string(sn::color(42)));
STATIC_REQUIRE(sn::color_traits::to_string_or_empty(sn::color(42)) == "");
REQUIRE_THROWS_AS(sn::color_traits::to_string_or_throw(sn::color(42)), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::to_string(sn::color::green) == "green");
STATIC_REQUIRE(enum_hpp::to_string_or_empty(sn::color::green) == "green");
REQUIRE(enum_hpp::to_string_or_throw(sn::color::green) == "green");
REQUIRE_THROWS_AS(enum_hpp::to_string_or_throw(sn::color(42)), enum_hpp::exception);
}
{
STATIC_REQUIRE(sn::render::mask_traits::to_string(sn::render::mask::none) == "none");
@@ -178,6 +222,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::numbers_traits::to_string(sn::numbers(100500)));
STATIC_REQUIRE(sn::numbers_traits::to_string_or_empty(sn::numbers(100500)) == "");
REQUIRE_THROWS_AS(sn::numbers_traits::to_string_or_throw(sn::numbers(100500)), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::to_string(sn::_180) == "_180");
STATIC_REQUIRE(enum_hpp::to_string_or_empty(sn::_180) == "_180");
REQUIRE(enum_hpp::to_string_or_throw(sn::_180) == "_180");
REQUIRE_THROWS_AS(enum_hpp::to_string_or_throw(sn::numbers(100500)), enum_hpp::exception);
}
}
@@ -198,6 +247,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::color_traits::from_string("42"));
STATIC_REQUIRE(sn::color_traits::from_string_or_default("42", sn::color::red) == sn::color::red);
REQUIRE_THROWS_AS(sn::color_traits::from_string_or_throw("42"), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::from_string<sn::color>("green") == sn::color::green);
STATIC_REQUIRE(enum_hpp::from_string_or_default("green", sn::color::red) == sn::color::green);
REQUIRE(enum_hpp::from_string_or_throw<sn::color>("green") == sn::color::green);
REQUIRE_THROWS_AS(enum_hpp::from_string_or_throw<sn::color>("42"), enum_hpp::exception);
}
{
STATIC_REQUIRE(sn::render::mask_traits::from_string("none") == sn::render::mask::none);
@@ -210,6 +264,10 @@ TEST_CASE("enum") {
STATIC_REQUIRE(sn::numbers_traits::from_string("_10") == sn::_10);
STATIC_REQUIRE(sn::numbers_traits::from_string("_240") == sn::_240);
STATIC_REQUIRE_FALSE(sn::numbers_traits::from_string("error"));
STATIC_REQUIRE(enum_hpp::from_string<sn::numbers>("_10") == sn::_10);
STATIC_REQUIRE(enum_hpp::from_string<sn::numbers>("_240") == sn::_240);
STATIC_REQUIRE_FALSE(enum_hpp::from_string<sn::numbers>("error"));
}
}
@@ -230,6 +288,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::color_traits::to_index(sn::color(42)));
STATIC_REQUIRE(sn::color_traits::to_index_or_invalid(sn::color(42)) == enum_hpp::invalid_index);
REQUIRE_THROWS_AS(sn::color_traits::to_index_or_throw(sn::color(42)), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::to_index(sn::color::green) == 1u);
STATIC_REQUIRE(enum_hpp::to_index_or_invalid(sn::color::green) == 1u);
REQUIRE(enum_hpp::to_index_or_throw(sn::color::green) == 1u);
REQUIRE_THROWS_AS(enum_hpp::to_index_or_throw(sn::color(42)), enum_hpp::exception);
}
{
STATIC_REQUIRE(sn::render::mask_traits::to_index(sn::render::mask::none) == 0u);
@@ -263,6 +326,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::numbers_traits::to_index(sn::numbers(100500)));
STATIC_REQUIRE(sn::numbers_traits::to_index_or_invalid(sn::numbers(100500)) == enum_hpp::invalid_index);
REQUIRE_THROWS_AS(sn::numbers_traits::to_index_or_throw(sn::numbers(100500)), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::to_index(sn::_180) == 180u);
STATIC_REQUIRE(enum_hpp::to_index_or_invalid(sn::_180) == 180u);
REQUIRE(enum_hpp::to_index_or_throw(sn::_180) == 180u);
REQUIRE_THROWS_AS(enum_hpp::to_index_or_throw(sn::numbers(100500)), enum_hpp::exception);
}
}
@@ -283,6 +351,11 @@ TEST_CASE("enum") {
STATIC_REQUIRE_FALSE(sn::color_traits::from_index(42));
STATIC_REQUIRE(sn::color_traits::from_index_or_default(42, sn::color::red) == sn::color::red);
REQUIRE_THROWS_AS(sn::color_traits::from_index_or_throw(42), enum_hpp::exception);
STATIC_REQUIRE(enum_hpp::from_index<sn::color>(1) == sn::color::green);
STATIC_REQUIRE(enum_hpp::from_index_or_default(1, sn::color::red) == sn::color::green);
REQUIRE(enum_hpp::from_index_or_throw<sn::color>(1) == sn::color::green);
REQUIRE_THROWS_AS(enum_hpp::from_index_or_throw<sn::color>(42), enum_hpp::exception);
}
{
STATIC_REQUIRE(sn::render::mask_traits::from_index(0) == sn::render::mask::none);
@@ -295,6 +368,10 @@ TEST_CASE("enum") {
STATIC_REQUIRE(sn::numbers_traits::from_index(10) == sn::_10);
STATIC_REQUIRE(sn::numbers_traits::from_index(240) == sn::_240);
STATIC_REQUIRE_FALSE(sn::numbers_traits::from_index(100500));
STATIC_REQUIRE(enum_hpp::from_index<sn::numbers>(10) == sn::_10);
STATIC_REQUIRE(enum_hpp::from_index<sn::numbers>(240) == sn::_240);
STATIC_REQUIRE_FALSE(enum_hpp::from_index<sn::numbers>(100500));
}
}
}