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ut.hpp
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ut.hpp
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//
// Copyright (c) 2019-2020 Kris Jusiak (kris at jusiak dot net)
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#if defined(__cpp_modules)
export module boost.ut;
export import std;
#else
#pragma once
#endif
#if defined(_MSC_VER)
#include <ciso646> // and, or, not
#endif
#if not defined(__cpp_rvalue_references)
#error "[Boost::ext].UT requires support for rvalue references";
#elif not defined(__cpp_decltype)
#error "[Boost::ext].UT requires support for decltype";
#elif not defined(__cpp_return_type_deduction)
#error "[Boost::ext].UT requires support for return type deduction";
#elif not defined(__cpp_deduction_guides)
#error "[Boost::ext].UT requires support for return deduction guides";
#elif not defined(__cpp_generic_lambdas)
#error "[Boost::ext].UT requires support for generic lambdas";
#elif not defined(__cpp_constexpr)
#error "[Boost::ext].UT requires support for constexpr";
#elif not defined(__cpp_alias_templates)
#error "[Boost::ext].UT requires support for alias templates";
#elif not defined(__cpp_variadic_templates)
#error "[Boost::ext].UT requires support for variadic templates";
#elif not defined(__cpp_fold_expressions)
#error "[Boost::ext].UT requires support for return fold expressions";
#elif not defined(__cpp_static_assert)
#error "[Boost::ext].UT requires support for static assert";
#else
#define BOOST_UT_VERSION 1'1'8
#if defined(__has_builtin) and (__GNUC__ < 10) and not defined(__clang__)
#undef __has_builtin
#endif
#if not defined(__has_builtin)
#if (__GNUC__ >= 9)
#define __has___builtin_FILE 1
#define __has___builtin_LINE 1
#endif
#define __has_builtin(...) __has_##__VA_ARGS__
#endif
#include <array>
#include <iostream>
#include <sstream>
#include <string_view>
#include <utility>
#include <vector>
#if __has_include(<unistd.h>) and __has_include(<sys/wait.h>)
#include <sys/wait.h>
#include <unistd.h>
#endif
#if defined(__cpp_exceptions)
#include <exception>
#endif
#if defined(__cpp_modules)
export namespace boost::inline ext::ut {
#else
namespace boost {
inline namespace ext {
namespace ut {
#endif
inline namespace v1_1_8 {
namespace utility {
class string_view {
public:
constexpr string_view() = default;
template <class TStr>
constexpr /*explicit(false)*/ string_view(const TStr& str)
: data_{str.c_str()}, size_{str.size()} {}
constexpr /*explicit(false)*/ string_view(const char* const data)
: data_{data}, size_{[data] {
decltype(sizeof("")) size{};
for (size = {}; data[size] != '\0'; ++size)
;
return size;
}()} {}
constexpr string_view(const char* const data, decltype(sizeof("")) size)
: data_{data}, size_{size} {}
template <auto N>
constexpr string_view(const char (&data)[N]) : data_{data}, size_{N - 1} {}
template <class T>
[[nodiscard]] constexpr operator T() const {
return T{data_, size_};
}
template <class TOs>
friend auto operator<<(TOs& os, const string_view& sv) -> TOs& {
os.write(sv.data_, long(sv.size_));
return os;
}
private:
const char* data_{};
decltype(sizeof("")) size_{};
};
template <class>
class function;
template <class R, class... TArgs>
class function<R(TArgs...)> {
public:
constexpr function() = default;
template <class T>
constexpr /*explicit(false)*/ function(T data)
: invoke_{invoke_impl<T>},
destroy_{destroy_impl<T>},
data_{new T{static_cast<T&&>(data)}} {}
constexpr function(function&& other)
: invoke_{static_cast<decltype(other.invoke_)&&>(other.invoke_)},
destroy_{static_cast<decltype(other.destroy_)&&>(other.destroy_)},
data_{static_cast<decltype(other.data_)&&>(other.data_)} {
other.data_ = {};
}
constexpr function(const function&) = delete;
~function() { destroy_(data_); }
constexpr function& operator=(const function&) = delete;
constexpr function& operator=(function&&) = delete;
[[nodiscard]] constexpr auto operator()(TArgs... args) -> R {
return invoke_(data_, args...);
}
[[nodiscard]] constexpr auto operator()(TArgs... args) const -> R {
return invoke_(data_, args...);
}
private:
template <class T>
[[nodiscard]] static auto invoke_impl(void* data, TArgs... args) -> R {
return (*static_cast<T*>(data))(args...);
}
template <class T>
static auto destroy_impl(void* data) -> void {
delete static_cast<T*>(data);
}
R (*invoke_)(void*, TArgs...){};
void (*destroy_)(void*){};
void* data_{};
};
[[nodiscard]] inline auto is_match(std::string_view input,
std::string_view pattern) -> bool {
if (std::empty(pattern)) {
return std::empty(input);
}
if (std::empty(input)) {
return pattern[0] == '*' ? is_match(input, pattern.substr(1)) : false;
}
if (pattern[0] != '?' and pattern[0] != '*' and pattern[0] != input[0]) {
return false;
}
if (pattern[0] == '*') {
for (decltype(std::size(input)) i = 0u; i <= std::size(input); ++i) {
if (is_match(input.substr(i), pattern.substr(1))) {
return true;
}
}
return false;
}
return is_match(input.substr(1), pattern.substr(1));
}
template <class TPattern, class TStr>
[[nodiscard]] constexpr auto match(const TPattern& pattern, const TStr& str)
-> std::vector<TStr> {
std::vector<TStr> groups{};
auto pi = 0u, si = 0u;
const auto matcher = [&](char b, char e, char c = 0) {
const auto match = si;
while (str[si] and str[si] != b and str[si] != c) {
++si;
}
groups.emplace_back(str.substr(match, si - match));
while (pattern[pi] and pattern[pi] != e) {
++pi;
}
pi++;
};
while (pi < std::size(pattern) && si < std::size(str)) {
if (pattern[pi] == '\'' and str[si] == '\'' and pattern[pi + 1] == '{') {
++si;
matcher('\'', '}');
} else if (pattern[pi] == '{') {
matcher(' ', '}', ',');
} else if (pattern[pi] != str[si]) {
return {};
}
++pi, ++si;
}
if (si < str.size() or pi < std::size(pattern)) {
return {};
}
return groups;
}
template <class T = std::string_view, class TDelim>
[[nodiscard]] inline auto split(T input, TDelim delim) -> std::vector<T> {
std::vector<T> output{};
std::size_t first{};
while (first < std::size(input)) {
const auto second = input.find_first_of(delim, first);
if (first != second) {
output.emplace_back(input.substr(first, second - first));
}
if (second == T::npos) {
break;
}
first = second + 1;
}
return output;
}
} // namespace utility
namespace reflection {
class source_location {
public:
[[nodiscard]] static constexpr auto current(
#if (__has_builtin(__builtin_FILE) and __has_builtin(__builtin_LINE))
const char* file = __builtin_FILE(), int line = __builtin_LINE()
#else
const char* file = "unknown", int line = {}
#endif
) noexcept {
source_location sl{};
sl.file_ = file;
sl.line_ = line;
return sl;
}
[[nodiscard]] constexpr auto file_name() const noexcept { return file_; }
[[nodiscard]] constexpr auto line() const noexcept { return line_; }
private:
const char* file_{"unknown"};
int line_{};
};
template <class T>
[[nodiscard]] constexpr auto type_name() -> utility::string_view {
#if defined(_MSC_VER) and not defined(__clang__)
return {&__FUNCSIG__[105], sizeof(__FUNCSIG__) - 113};
#elif defined(__clang__)
return {&__PRETTY_FUNCTION__[74], sizeof(__PRETTY_FUNCTION__) - 76};
#elif defined(__GNUC__)
return {&__PRETTY_FUNCTION__[113], sizeof(__PRETTY_FUNCTION__) - 115};
#endif
}
} // namespace reflection
namespace math {
template <class T>
[[nodiscard]] constexpr auto abs(const T t) -> T {
return t < T{} ? -t : t;
}
template <class T>
[[nodiscard]] constexpr auto min_value(const T& lhs, const T& rhs) -> const T& {
return (rhs < lhs) ? rhs : lhs;
}
template <class T, class TExp>
[[nodiscard]] constexpr auto pow(const T base, const TExp exp) -> T {
return exp ? T(base * pow(base, exp - TExp(1))) : T(1);
}
template <class T, char... Cs>
[[nodiscard]] constexpr auto num() -> T {
static_assert(
((Cs == '.' or Cs == '\'' or (Cs >= '0' and Cs <= '9')) and ...));
constexpr const char cs[]{Cs...};
T result{};
auto size = 0u, i = 0u, tmp = 1u;
while (i < sizeof...(Cs) and cs[i] != '.') {
if (cs[i++] != '\'') {
++size;
}
}
i = {};
while (i < sizeof...(Cs) and cs[i] != '.') {
if (cs[i] == '\'') {
--tmp;
} else {
result += pow(T(10), size - i - tmp) * T(cs[i] - '0');
}
++i;
}
return result;
}
template <class T, char... Cs>
[[nodiscard]] constexpr auto den() -> T {
constexpr const char cs[]{Cs...};
T result{};
auto i = 0u;
while (cs[i++] != '.')
;
for (auto j = i; j < sizeof...(Cs); ++j) {
result += pow(T(10), sizeof...(Cs) - j) * T(cs[j] - '0');
}
return result;
}
template <class T, char... Cs>
[[nodiscard]] constexpr auto den_size() -> T {
constexpr const char cs[]{Cs...};
T i{};
while (cs[i++] != '.')
;
return T(sizeof...(Cs)) - i + T(1);
}
template <class T, class TValue>
[[nodiscard]] constexpr auto den_size(TValue value) -> T {
constexpr auto precision = TValue(1e-7);
T result{};
TValue tmp{};
do {
value *= 10;
tmp = value - T(value);
++result;
} while (tmp > precision);
return result;
}
} // namespace math
namespace type_traits {
template <class...>
struct list {};
template <class T, class...>
struct identity {
using type = T;
};
template <class T>
struct function_traits : function_traits<decltype(&T::operator())> {};
template <class R, class... TArgs>
struct function_traits<R (*)(TArgs...)> {
using result_type = R;
using args = list<TArgs...>;
};
template <class R, class... TArgs>
struct function_traits<R(TArgs...)> {
using result_type = R;
using args = list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...)> {
using result_type = R;
using args = list<TArgs...>;
};
template <class R, class T, class... TArgs>
struct function_traits<R (T::*)(TArgs...) const> {
using result_type = R;
using args = list<TArgs...>;
};
template <class T>
T&& declval();
template <class... Ts, class TExpr>
constexpr auto is_valid(TExpr expr)
-> decltype(expr(declval<Ts...>()), bool()) {
return true;
}
template <class...>
constexpr auto is_valid(...) -> bool {
return false;
}
template <class T>
constexpr auto is_container_v =
is_valid<T>([](auto t) -> decltype(t.begin(), t.end(), void()) {});
template <class T>
constexpr auto has_npos_v = is_valid<T>([](auto t) -> decltype(void(t.npos)) {
});
template <class T>
constexpr auto has_value_v = is_valid<T>([](auto t) -> decltype(void(t.value)) {
});
template <class T>
constexpr auto has_epsilon_v =
is_valid<T>([](auto t) -> decltype(void(t.epsilon)) {});
template <class T>
inline constexpr auto is_floating_point_v = false;
template <>
inline constexpr auto is_floating_point_v<float> = true;
template <>
inline constexpr auto is_floating_point_v<double> = true;
template <>
inline constexpr auto is_floating_point_v<long double> = true;
#if defined(__clang__) or defined(_MSC_VER)
template <class From, class To>
constexpr auto is_convertible_v = __is_convertible_to(From, To);
#else
template <class From, class To>
constexpr auto is_convertible(int) -> decltype(bool(To(declval<From>()))) {
return true;
}
template <class...>
constexpr auto is_convertible(...) {
return false;
}
template <class From, class To>
constexpr auto is_convertible_v = is_convertible<From, To>(0);
#endif
template <bool>
struct requires_ {};
template <>
struct requires_<true> {
using type = int;
};
template <bool Cond>
using requires_t = typename requires_<Cond>::type;
} // namespace type_traits
struct none {};
namespace events {
struct test_begin {
utility::string_view type{};
utility::string_view name{};
reflection::source_location location{};
};
template <class Test, class TArg = none>
struct test {
utility::string_view type{};
utility::string_view name{};
std::vector<utility::string_view> tag{};
reflection::source_location location{};
TArg arg{};
Test run{};
constexpr auto operator()() { run_impl(static_cast<Test&&>(run), arg); }
constexpr auto operator()() const { run_impl(static_cast<Test&&>(run), arg); }
private:
static constexpr auto run_impl(Test test, const none&) { test(); }
template <class T>
static constexpr auto run_impl(T test, const TArg& arg)
-> decltype(test(arg), void()) {
test(arg);
}
template <class T>
static constexpr auto run_impl(T test, const TArg&)
-> decltype(test.template operator()<TArg>(), void()) {
test.template operator()<TArg>();
}
};
template <class Test, class TArg>
test(utility::string_view, utility::string_view, utility::string_view,
reflection::source_location, TArg, Test) -> test<Test, TArg>;
template <class TSuite>
struct suite {
TSuite run{};
constexpr auto operator()() { run(); }
constexpr auto operator()() const { run(); }
};
template <class TSuite>
suite(TSuite) -> suite<TSuite>;
struct test_run {
utility::string_view type{};
utility::string_view name{};
};
template <class TArg = none>
struct skip {
utility::string_view type{};
utility::string_view name{};
TArg arg{};
};
template <class TArg>
skip(utility::string_view, utility::string_view, TArg) -> skip<TArg>;
struct test_skip {
utility::string_view type{};
utility::string_view name{};
};
template <class TExpr>
struct assertion {
TExpr expr{};
reflection::source_location location{};
};
template <class TExpr>
assertion(TExpr, reflection::source_location) -> assertion<TExpr>;
template <class TExpr>
struct assertion_pass {
TExpr expr{};
reflection::source_location location{};
};
template <class TExpr>
assertion_pass(TExpr) -> assertion_pass<TExpr>;
template <class TExpr>
struct assertion_fail {
TExpr expr{};
reflection::source_location location{};
};
template <class TExpr>
assertion_fail(TExpr) -> assertion_fail<TExpr>;
struct test_end {
utility::string_view type{};
utility::string_view name{};
};
template <class TMsg>
struct log {
TMsg msg{};
};
template <class TMsg = utility::string_view>
log(TMsg) -> log<TMsg>;
struct fatal_assertion {};
struct exception {
const char* msg{};
auto what() const -> const char* { return msg; }
};
struct summary {};
} // namespace events
namespace detail {
struct op {};
struct fatal {};
struct cfg {
static inline reflection::source_location location{};
static inline bool wip{};
};
template <class T>
[[nodiscard]] constexpr auto get_impl(const T& t, int) -> decltype(t.get()) {
return t.get();
}
template <class T>
[[nodiscard]] constexpr auto get_impl(const T& t, ...) -> decltype(auto) {
return t;
}
template <class T>
[[nodiscard]] constexpr auto get(const T& t) {
return get_impl(t, 0);
}
template <class T>
struct type_ : op {
template <class TOther>
[[nodiscard]] constexpr auto operator()(TOther) const -> const type_<TOther> {
return {};
}
[[nodiscard]] constexpr auto operator==(type_<T>) -> bool { return true; }
template <class TOther>
[[nodiscard]] constexpr auto operator==(type_<TOther>) -> bool {
return false;
}
[[nodiscard]] constexpr auto operator!=(type_<T>) -> bool { return true; }
template <class TOther>
[[nodiscard]] constexpr auto operator!=(type_<TOther>) -> bool {
return true;
}
};
template <class T, class = int>
struct value : op {
using value_type = T;
constexpr /*explicit(false)*/ value(const T& value) : value_{value} {}
[[nodiscard]] constexpr explicit operator T() const { return value_; }
[[nodiscard]] constexpr decltype(auto) get() const { return value_; }
T value_{};
};
template <class T>
struct value<T, type_traits::requires_t<type_traits::is_floating_point_v<T>>>
: op {
using value_type = T;
static inline auto epsilon = T{};
constexpr value(const T& value, const T precision) : value_{value} {
epsilon = precision;
}
constexpr /*explicit(false)*/ value(const T& val)
: value{val, T(1) / math::pow(T(10),
math::den_size<unsigned long long>(val))} {}
[[nodiscard]] constexpr explicit operator T() const { return value_; }
[[nodiscard]] constexpr decltype(auto) get() const { return value_; }
T value_{};
};
template <class T>
class value_location : public detail::value<T> {
public:
constexpr /*explicit(false)*/ value_location(
const T& t, const reflection::source_location& sl =
reflection::source_location::current())
: detail::value<T>{t} {
cfg::location = sl;
}
constexpr value_location(const T& t, const T precision,
const reflection::source_location& sl =
reflection::source_location::current())
: detail::value<T>{t, precision} {
cfg::location = sl;
}
};
template <auto N>
struct integral_constant : op {
using value_type = decltype(N);
static constexpr auto value = N;
[[nodiscard]] constexpr auto operator-() const {
return integral_constant<-N>{};
}
[[nodiscard]] constexpr explicit operator value_type() const { return N; }
[[nodiscard]] constexpr auto get() const { return N; }
};
template <class T, auto N, auto D, auto Size, auto P = 1>
struct floating_point_constant : op {
using value_type = T;
static constexpr auto epsilon = T(1) / math::pow(T(10), Size - 1);
static constexpr auto value = T(P) * (T(N) + (T(D) / math::pow(T(10), Size)));
[[nodiscard]] constexpr auto operator-() const {
return floating_point_constant<T, N, D, Size, -1>{};
}
[[nodiscard]] constexpr explicit operator value_type() const { return value; }
[[nodiscard]] constexpr auto get() const { return value; }
};
template <class TLhs, class TRhs>
struct eq_ : op {
constexpr eq_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator==;
using std::operator<;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value == TRhs::value;
} else if constexpr (type_traits::has_epsilon_v<TLhs> and
type_traits::has_epsilon_v<TRhs>) {
return math::abs(get(lhs) - get(rhs)) <
math::min_value(TLhs::epsilon, TRhs::epsilon);
} else if constexpr (type_traits::has_epsilon_v<TLhs>) {
return math::abs(get(lhs) - get(rhs)) < TLhs::epsilon;
} else if constexpr (type_traits::has_epsilon_v<TRhs>) {
return math::abs(get(lhs) - get(rhs)) < TRhs::epsilon;
} else {
return get(lhs) == get(rhs);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct neq_ : op {
constexpr neq_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator==;
using std::operator!=;
using std::operator>;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value != TRhs::value;
} else if constexpr (type_traits::has_epsilon_v<TLhs> and
type_traits::has_epsilon_v<TRhs>) {
return math::abs(get(lhs_) - get(rhs_)) >
math::min_value(TLhs::epsilon, TRhs::epsilon);
} else if constexpr (type_traits::has_epsilon_v<TLhs>) {
return math::abs(get(lhs_) - get(rhs_)) > TLhs::epsilon;
} else if constexpr (type_traits::has_epsilon_v<TRhs>) {
return math::abs(get(lhs_) - get(rhs_)) > TRhs::epsilon;
} else {
return get(lhs_) != get(rhs_);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct gt_ : op {
constexpr gt_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator>;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value > TRhs::value;
} else {
return get(lhs_) > get(rhs_);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct ge_ : op {
constexpr ge_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator>=;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value >= TRhs::value;
} else {
return get(lhs_) >= get(rhs_);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct lt_ : op {
constexpr lt_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator<;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value < TRhs::value;
} else {
return get(lhs_) < get(rhs_);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
private:
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct le_ : op {
constexpr le_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs}, rhs_{rhs}, value_{[&] {
using std::operator<=;
if constexpr (type_traits::has_value_v<TLhs> and
type_traits::has_value_v<TRhs>) {
return TLhs::value <= TRhs::value;
} else {
return get(lhs_) <= get(rhs_);
}
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct and_ : op {
constexpr and_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs},
rhs_{rhs},
value_{static_cast<bool>(lhs) and static_cast<bool>(rhs)} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class TLhs, class TRhs>
struct or_ : op {
constexpr or_(const TLhs& lhs = {}, const TRhs& rhs = {})
: lhs_{lhs},
rhs_{rhs},
value_{static_cast<bool>(lhs) or static_cast<bool>(rhs)} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto lhs() const { return get(lhs_); }
[[nodiscard]] constexpr auto rhs() const { return get(rhs_); }
const TLhs lhs_{};
const TRhs rhs_{};
const bool value_{};
};
template <class T>
struct not_ : op {
explicit constexpr not_(const T& t = {})
: t_{t}, value_{not static_cast<bool>(t)} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
[[nodiscard]] constexpr auto value() const { return get(t_); }
const T t_{};
const bool value_{};
};
template <class>
struct fatal_;
#if defined(__cpp_exceptions)
template <class TExpr, class TException = void>
struct throws_ : op {
constexpr explicit throws_(const TExpr& expr)
: value_{[&expr] {
try {
expr();
} catch (const TException&) {
return true;
} catch (...) {
return false;
}
return false;
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
const bool value_{};
};
template <class TExpr>
struct throws_<TExpr, void> : op {
constexpr explicit throws_(const TExpr& expr)
: value_{[&expr] {
try {
expr();
} catch (...) {
return true;
}
return false;
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
const bool value_{};
};
template <class TExpr>
struct nothrow_ : op {
constexpr explicit nothrow_(const TExpr& expr)
: value_{[&expr] {
try {
expr();
} catch (...) {
return false;
}
return true;
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
const bool value_{};
};
#endif
#if __has_include(<unistd.h>) and __has_include(<sys/wait.h>)
template <class TExpr>
struct aborts_ : op {
constexpr explicit aborts_(const TExpr& expr)
: value_{[&expr]() -> bool {
if (const auto pid = fork(); not pid) {
expr();
exit(0);
}
auto exit_status = 0;
wait(&exit_status);
return exit_status;
}()} {}
[[nodiscard]] constexpr operator bool() const { return value_; }
const bool value_{};
};
#endif
} // namespace detail
namespace type_traits {
template <class T>
inline constexpr auto is_op_v = __is_base_of(detail::op, T);
} // namespace type_traits
struct colors {
std::string_view none = "\033[0m";
std::string_view pass = "\033[32m";
std::string_view fail = "\033[31m";
};
class printer {
[[nodiscard]] inline auto color(const bool cond) {
const std::string_view colors[] = {colors_.fail, colors_.pass};
return colors[cond];
}
public:
printer() = default;
/*explicit(false)*/ printer(const colors colors) : colors_{colors} {}
template <class T>
auto& operator<<(const T& t) {
out_ << detail::get(t);
return *this;
}
template <class T,
type_traits::requires_t<type_traits::is_container_v<T> and
not type_traits::has_npos_v<T>> = 0>
auto& operator<<(T&& t) {
*this << '{';
auto first = true;
for (const auto& arg : t) {
*this << (first ? "" : ", ") << arg;
first = false;
}
*this << '}';
return *this;
}
auto& operator<<(utility::string_view sv) {
out_ << sv;
return *this;
}
template <class TLhs, class TRhs>
auto& operator<<(const detail::eq_<TLhs, TRhs>& op) {
return (*this << color(op) << op.lhs() << " == " << op.rhs()
<< colors_.none);
}
template <class TLhs, class TRhs>