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add copy-constructor version of Observer::Target::Notify

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This commit is contained in:
falsycat 2023-08-01 21:12:42 +09:00
parent eafa05fbf5
commit 3089bccf55
2 changed files with 11 additions and 7 deletions
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2
iface/common/dealer.hh
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@ -49,7 +49,7 @@ class Taker : public Dealer<T>, public Observer<T>::Target {
public:
explicit Taker(const DealerMeta& meta = {}) noexcept : Dealer<T>(meta) { }
void Take(const T& v) noexcept { Notify(v); }
void Take(const T& v) noexcept { Observer<T>::Target::Notify(v); }
};
} // namespace nf7

16
iface/common/observer.hh
View File

@ -48,6 +48,15 @@ class Observer<T>::Target {
Target& operator=(Target&&) = delete;
protected:
void Notify(const T& v) noexcept {
assert(!calling_observer_ && "do not call Notify from observer callback");
calling_observer_ = true;
for (auto obs : obs_) {
obs->Notify(v);
}
calling_observer_ = false;
}
void Notify(T&& v) noexcept {
assert(!calling_observer_ && "do not call Notify from observer callback");
@ -58,12 +67,7 @@ class Observer<T>::Target {
calling_observer_ = false;
return;
}
calling_observer_ = true;
for (auto obs : obs_) {
obs->Notify(v);
}
calling_observer_ = false;
Notify(v);
}
bool observed(const T* = nullptr) const noexcept { return !obs_.empty(); }