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オーバロードした関数をbindする

Posted at

次の様なクラス(構造体)が有るとして

struct A {
    void echo() {}
    void echo(int) {}
};

次のようなコードを書く。

A a;
std::bind(&A::echo, &a);
std::bind(&A::echo, &a, 10);

すると

No matching function for call to 'bind'

と怒られる。

対応方法

次のように書けば大丈夫

std::bind<void (A::*)()>(&A::echo, &a);
std::bind<void (A::*)(int)>(&A::echo, &a, 10);

または

std::bind(static_cast<void (A::*)()>(&A::echo), &a);
std::bind(static_cast<void (A::*)(int)>(&A::echo), &a, 10);
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