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Fix SFINAE usage in PromiseFuture.h.

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This commit is contained in:
levlam 2021-12-28 01:29:54 +03:00
parent 3303fedabd
commit da4ff40f76
1 changed files with 19 additions and 33 deletions
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52
tdactor/td/actor/PromiseFuture.h
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@ -184,38 +184,20 @@ class SafePromise;
template <class T = Unit> template <class T = Unit>
class Promise; class Promise;
constexpr inline std::false_type is_promise_interface(...) { template <class T>
return {}; struct is_promise_interface : std::false_type {};
}
template <class U>
struct is_promise_interface<PromiseInterface<U>> : std::true_type {};
template <class U>
struct is_promise_interface<Promise<U>> : std::true_type {};
template <class T> template <class T>
constexpr std::true_type is_promise_interface(const PromiseInterface<T> &promise) { struct is_promise_interface_ptr : std::false_type {};
return {};
}
template <class T> template <class U>
constexpr std::true_type is_promise_interface(const Promise<T> &promise) { struct is_promise_interface_ptr<unique_ptr<U>> : std::true_type {};
return {};
}
template <class F>
constexpr bool is_promise_interface() {
return decltype(is_promise_interface(std::declval<F>()))::value;
}
constexpr inline std::false_type is_promise_interface_ptr(...) {
return {};
}
template <class T>
constexpr std::true_type is_promise_interface_ptr(const unique_ptr<T> &promise) {
return {};
}
template <class F>
constexpr bool is_promise_interface_ptr() {
return decltype(is_promise_interface_ptr(std::declval<F>()))::value;
}
template <class T = void, class F = void, std::enable_if_t<std::is_same<T, void>::value, bool> has_t = false> template <class T = void, class F = void, std::enable_if_t<std::is_same<T, void>::value, bool> has_t = false>
auto lambda_promise(F &&f) { auto lambda_promise(F &&f) {
@ -227,22 +209,26 @@ auto lambda_promise(F &&f) {
return detail::LambdaPromise<T, std::decay_t<F>>(std::forward<F>(f)); return detail::LambdaPromise<T, std::decay_t<F>>(std::forward<F>(f));
} }
template <class T, class F, std::enable_if_t<is_promise_interface<F>(), bool> from_promise_interface = true> template <class T, class F,
std::enable_if_t<is_promise_interface<std::decay_t<F>>::value, bool> from_promise_interface = true>
auto &&promise_interface(F &&f) { auto &&promise_interface(F &&f) {
return std::forward<F>(f); return std::forward<F>(f);
} }
template <class T, class F, std::enable_if_t<!is_promise_interface<F>(), bool> from_promise_interface = false> template <class T, class F,
std::enable_if_t<!is_promise_interface<std::decay_t<F>>::value, bool> from_promise_interface = false>
auto promise_interface(F &&f) { auto promise_interface(F &&f) {
return lambda_promise<T>(std::forward<F>(f)); return lambda_promise<T>(std::forward<F>(f));
} }
template <class T, class F, std::enable_if_t<is_promise_interface_ptr<F>(), bool> from_promise_interface = true> template <class T, class F,
std::enable_if_t<is_promise_interface_ptr<std::decay_t<F>>::value, bool> from_promise_interface = true>
auto promise_interface_ptr(F &&f) { auto promise_interface_ptr(F &&f) {
return std::forward<F>(f); return std::forward<F>(f);
} }
template <class T, class F, std::enable_if_t<!is_promise_interface_ptr<F>(), bool> from_promise_interface = false> template <class T, class F,
std::enable_if_t<!is_promise_interface_ptr<std::decay_t<F>>::value, bool> from_promise_interface = false>
auto promise_interface_ptr(F &&f) { auto promise_interface_ptr(F &&f) {
return td::make_unique<std::decay_t<decltype(promise_interface<T>(std::forward<F>(f)))>>( return td::make_unique<std::decay_t<decltype(promise_interface<T>(std::forward<F>(f)))>>(
promise_interface<T>(std::forward<F>(f))); promise_interface<T>(std::forward<F>(f)));