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Fixes #65
This commit is contained in:
Sy Brand
2022-11-24 14:45:26 +00:00
parent f11bba1db5
commit 61a4d18434
1 changed files with 227 additions and 224 deletions
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151
include/tl/expected.hpp
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@@ -66,30 +66,30 @@
#define TL_EXPECTED_IS_TRIVIALLY_DESTRUCTIBLE(T) \
std::is_trivially_destructible<T>
// GCC 5 < v < 8 has a bug in is_trivially_copy_constructible which breaks std::vector
// for non-copyable types
#elif (defined(__GNUC__) && __GNUC__ < 8 && \
!defined(__clang__))
// GCC 5 < v < 8 has a bug in is_trivially_copy_constructible which breaks
// std::vector for non-copyable types
#elif (defined(__GNUC__) && __GNUC__ < 8 && !defined(__clang__))
#ifndef TL_GCC_LESS_8_TRIVIALLY_COPY_CONSTRUCTIBLE_MUTEX
#define TL_GCC_LESS_8_TRIVIALLY_COPY_CONSTRUCTIBLE_MUTEX
namespace tl {
namespace detail {
template <class T>
struct is_trivially_copy_constructible : std::is_trivially_copy_constructible<T>{};
struct is_trivially_copy_constructible
: std::is_trivially_copy_constructible<T> {};
#ifdef _GLIBCXX_VECTOR
template <class T, class A>
struct is_trivially_copy_constructible<std::vector<T,A>>
: std::false_type{};
struct is_trivially_copy_constructible<std::vector<T, A>> : std::false_type {};
#endif
}
}
} // namespace detail
} // namespace tl
#endif
#define TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) \
tl::detail::is_trivially_copy_constructible<T>
#define TL_EXPECTED_IS_TRIVIALLY_COPY_ASSIGNABLE(T) \
std::is_trivially_copy_assignable<T>
#define TL_EXPECTED_IS_TRIVIALLY_DESTRUCTIBLE(T) std::is_trivially_destructible<T>
#define TL_EXPECTED_IS_TRIVIALLY_DESTRUCTIBLE(T) \
std::is_trivially_destructible<T>
#else
#define TL_EXPECTED_IS_TRIVIALLY_COPY_CONSTRUCTIBLE(T) \
std::is_trivially_copy_constructible<T>
@@ -138,7 +138,6 @@ public:
constexpr explicit unexpected(E &&e) : m_val(std::move(e)) {}
template <class... Args, typename std::enable_if<std::is_constructible<
E, Args &&...>::value>::type * = nullptr>
constexpr explicit unexpected(Args &&...args)
@@ -147,8 +146,7 @@ public:
class U, class... Args,
typename std::enable_if<std::is_constructible<
E, std::initializer_list<U> &, Args &&...>::value>::type * = nullptr>
constexpr explicit unexpected(std::initializer_list<U> l,
Args &&...args)
constexpr explicit unexpected(std::initializer_list<U> l, Args &&...args)
: m_val(l, std::forward<Args>(args)...) {}
constexpr const E &value() const & { return m_val; }
@@ -161,8 +159,7 @@ private:
};
#ifdef __cpp_deduction_guides
template<class E>
unexpected(E) -> unexpected<E>;
template <class E> unexpected(E) -> unexpected<E>;
#endif
template <class E>
@@ -241,19 +238,26 @@ struct conjunction<B, Bs...>
// which results in a hard-error when using it in a noexcept expression
// in some cases. This is a check to workaround the common failing case.
#ifdef TL_TRAITS_LIBCXX_MEM_FN_WORKAROUND
template <class T> struct is_pointer_to_non_const_member_func : std::false_type {};
template <class T>
struct is_pointer_to_non_const_member_func : std::false_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...)> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...)>
: std::true_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...)&> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...) &>
: std::true_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...) &&> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...) &&>
: std::true_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...) volatile> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...) volatile>
: std::true_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...) volatile &> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...) volatile &>
: std::true_type {};
template <class T, class Ret, class... Args>
struct is_pointer_to_non_const_member_func<Ret(T::*) (Args...) volatile &&> : std::true_type {};
struct is_pointer_to_non_const_member_func<Ret (T::*)(Args...) volatile &&>
: std::true_type {};
template <class T> struct is_const_or_const_ref : std::false_type {};
template <class T> struct is_const_or_const_ref<T const &> : std::true_type {};
@@ -262,13 +266,13 @@ template <class T> struct is_const_or_const_ref<T const> : std::true_type {};
// std::invoke from C++17
// https://stackoverflow.com/questions/38288042/c11-14-invoke-workaround
template <typename Fn, typename... Args,
template <
typename Fn, typename... Args,
#ifdef TL_TRAITS_LIBCXX_MEM_FN_WORKAROUND
typename = enable_if_t<!(is_pointer_to_non_const_member_func<Fn>::value
&& is_const_or_const_ref<Args...>::value)>,
typename = enable_if_t<!(is_pointer_to_non_const_member_func<Fn>::value &&
is_const_or_const_ref<Args...>::value)>,
#endif
typename = enable_if_t<std::is_member_pointer<decay_t<Fn>>::value>,
int = 0>
typename = enable_if_t<std::is_member_pointer<decay_t<Fn>>::value>, int = 0>
constexpr auto invoke(Fn &&f, Args &&...args) noexcept(
noexcept(std::mem_fn(f)(std::forward<Args>(args)...)))
-> decltype(std::mem_fn(f)(std::forward<Args>(args)...)) {
@@ -288,9 +292,11 @@ template <class F, class, class... Us> struct invoke_result_impl;
template <class F, class... Us>
struct invoke_result_impl<
F, decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...), void()),
F,
decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...), void()),
Us...> {
using type = decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...));
using type =
decltype(detail::invoke(std::declval<F>(), std::declval<Us>()...));
};
template <class F, class... Us>
@@ -355,8 +361,8 @@ struct is_swappable<T[N], T[N]>
: std::integral_constant<
bool,
decltype(detail::swap_adl_tests::can_swap<T[N], T[N]>(0))::value &&
(!decltype(
detail::swap_adl_tests::uses_std<T[N], T[N]>(0))::value ||
(!decltype(detail::swap_adl_tests::uses_std<T[N], T[N]>(
0))::value ||
is_swappable<T, T>::value)> {};
template <class T, class U = T>
@@ -364,12 +370,10 @@ struct is_nothrow_swappable
: std::integral_constant<
bool,
is_swappable<T, U>::value &&
((decltype(detail::swap_adl_tests::uses_std<T, U>(0))::value
&& detail::swap_adl_tests::is_std_swap_noexcept<T>::value) ||
((decltype(detail::swap_adl_tests::uses_std<T, U>(0))::value &&
detail::swap_adl_tests::is_std_swap_noexcept<T>::value) ||
(!decltype(detail::swap_adl_tests::uses_std<T, U>(0))::value &&
detail::swap_adl_tests::is_adl_swap_noexcept<T,
U>::value))> {
};
detail::swap_adl_tests::is_adl_swap_noexcept<T, U>::value))> {};
#endif
#endif
@@ -411,14 +415,10 @@ using is_move_constructible_or_void =
is_void_or<T, std::is_move_constructible<T>>;
template <class T>
using is_copy_assignable_or_void =
is_void_or<T, std::is_copy_assignable<T>>;
using is_copy_assignable_or_void = is_void_or<T, std::is_copy_assignable<T>>;
template <class T>
using is_move_assignable_or_void =
is_void_or<T, std::is_move_assignable<T>>;
using is_move_assignable_or_void = is_void_or<T, std::is_move_assignable<T>>;
} // namespace detail
@@ -857,9 +857,7 @@ struct expected_operations_base : expected_storage_base<T, E> {
}
#endif
TL_EXPECTED_11_CONSTEXPR void destroy_val() {
get().~T();
}
TL_EXPECTED_11_CONSTEXPR void destroy_val() { get().~T(); }
};
// This base class provides some handy member functions which can be used in
@@ -1238,14 +1236,17 @@ class expected : private detail::expected_move_assign_base<T, E>,
"T must not be in_place_t");
static_assert(!std::is_same<T, std::remove_cv<unexpect_t>::type>::value,
"T must not be unexpect_t");
static_assert(!std::is_same<T, typename std::remove_cv<unexpected<E>>::type>::value,
static_assert(
!std::is_same<T, typename std::remove_cv<unexpected<E>>::type>::value,
"T must not be unexpected<E>");
static_assert(!std::is_reference<E>::value, "E must not be a reference");
T *valptr() { return std::addressof(this->m_val); }
const T *valptr() const { return std::addressof(this->m_val); }
unexpected<E> *errptr() { return std::addressof(this->m_unexpect); }
const unexpected<E> *errptr() const { return std::addressof(this->m_unexpect); }
const unexpected<E> *errptr() const {
return std::addressof(this->m_unexpect);
}
template <class U = T,
detail::enable_if_t<!std::is_void<U>::value> * = nullptr>
@@ -1290,24 +1291,26 @@ public:
#else
template <class F>
TL_EXPECTED_11_CONSTEXPR auto
and_then(F &&f) & -> decltype(and_then_impl(std::declval<expected&>(), std::forward<F>(f))) {
and_then(F &&f) & -> decltype(and_then_impl(std::declval<expected &>(),
std::forward<F>(f))) {
return and_then_impl(*this, std::forward<F>(f));
}
template <class F>
TL_EXPECTED_11_CONSTEXPR auto and_then(F &&f) && -> decltype(
and_then_impl(std::declval<expected&&>(), std::forward<F>(f))) {
TL_EXPECTED_11_CONSTEXPR auto
and_then(F &&f) && -> decltype(and_then_impl(std::declval<expected &&>(),
std::forward<F>(f))) {
return and_then_impl(std::move(*this), std::forward<F>(f));
}
template <class F>
constexpr auto and_then(F &&f) const & -> decltype(
and_then_impl(std::declval<expected const&>(), std::forward<F>(f))) {
constexpr auto and_then(F &&f) const & -> decltype(and_then_impl(
std::declval<expected const &>(), std::forward<F>(f))) {
return and_then_impl(*this, std::forward<F>(f));
}
#ifndef TL_EXPECTED_NO_CONSTRR
template <class F>
constexpr auto and_then(F &&f) const && -> decltype(
and_then_impl(std::declval<expected const&&>(), std::forward<F>(f))) {
constexpr auto and_then(F &&f) const && -> decltype(and_then_impl(
std::declval<expected const &&>(), std::forward<F>(f))) {
return and_then_impl(std::move(*this), std::forward<F>(f));
}
#endif
@@ -1329,14 +1332,14 @@ public:
}
#else
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(
expected_map_impl(std::declval<expected &>(), std::declval<F &&>()))
TL_EXPECTED_11_CONSTEXPR decltype(expected_map_impl(
std::declval<expected &>(), std::declval<F &&>()))
map(F &&f) & {
return expected_map_impl(*this, std::forward<F>(f));
}
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(
expected_map_impl(std::declval<expected>(), std::declval<F &&>()))
TL_EXPECTED_11_CONSTEXPR decltype(expected_map_impl(std::declval<expected>(),
std::declval<F &&>()))
map(F &&f) && {
return expected_map_impl(std::move(*this), std::forward<F>(f));
}
@@ -1373,14 +1376,14 @@ public:
}
#else
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(
expected_map_impl(std::declval<expected &>(), std::declval<F &&>()))
TL_EXPECTED_11_CONSTEXPR decltype(expected_map_impl(
std::declval<expected &>(), std::declval<F &&>()))
transform(F &&f) & {
return expected_map_impl(*this, std::forward<F>(f));
}
template <class F>
TL_EXPECTED_11_CONSTEXPR decltype(
expected_map_impl(std::declval<expected>(), std::declval<F &&>()))
TL_EXPECTED_11_CONSTEXPR decltype(expected_map_impl(std::declval<expected>(),
std::declval<F &&>()))
transform(F &&f) && {
return expected_map_impl(std::move(*this), std::forward<F>(f));
}
@@ -2241,9 +2244,9 @@ template <class Exp, class F,
detail::enable_if_t<!std::is_void<Ret>::value> * = nullptr>
constexpr auto or_else_impl(Exp &&exp, F &&f) {
static_assert(detail::is_expected<Ret>::value, "F must return an expected");
return exp.has_value()
? std::forward<Exp>(exp)
: detail::invoke(std::forward<F>(f), std::forward<Exp>(exp).error());
return exp.has_value() ? std::forward<Exp>(exp)
: detail::invoke(std::forward<F>(f),
std::forward<Exp>(exp).error());
}
template <class Exp, class F,
@@ -2251,9 +2254,9 @@ template <class Exp, class F,
std::declval<Exp>().error())),
detail::enable_if_t<std::is_void<Ret>::value> * = nullptr>
detail::decay_t<Exp> or_else_impl(Exp &&exp, F &&f) {
return exp.has_value()
? std::forward<Exp>(exp)
: (detail::invoke(std::forward<F>(f), std::forward<Exp>(exp).error()),
return exp.has_value() ? std::forward<Exp>(exp)
: (detail::invoke(std::forward<F>(f),
std::forward<Exp>(exp).error()),
std::forward<Exp>(exp));
}
#else
@@ -2263,9 +2266,9 @@ template <class Exp, class F,
detail::enable_if_t<!std::is_void<Ret>::value> * = nullptr>
auto or_else_impl(Exp &&exp, F &&f) -> Ret {
static_assert(detail::is_expected<Ret>::value, "F must return an expected");
return exp.has_value()
? std::forward<Exp>(exp)
: detail::invoke(std::forward<F>(f), std::forward<Exp>(exp).error());
return exp.has_value() ? std::forward<Exp>(exp)
: detail::invoke(std::forward<F>(f),
std::forward<Exp>(exp).error());
}
template <class Exp, class F,
@@ -2273,9 +2276,9 @@ template <class Exp, class F,
std::declval<Exp>().error())),
detail::enable_if_t<std::is_void<Ret>::value> * = nullptr>
detail::decay_t<Exp> or_else_impl(Exp &&exp, F &&f) {
return exp.has_value()
? std::forward<Exp>(exp)
: (detail::invoke(std::forward<F>(f), std::forward<Exp>(exp).error()),
return exp.has_value() ? std::forward<Exp>(exp)
: (detail::invoke(std::forward<F>(f),
std::forward<Exp>(exp).error()),
std::forward<Exp>(exp));
}
#endif