Is cast castable to class

2013-06-30 187 views 2 likes

class A { this() { } } 
class B : A { this() { } } 
auto b = new B() 
if(b.IsCastableTo(A)) { 
    //... 
}

如何檢查b是否可以輸入A？Is cast castable to class

來源

2013-06-30 NPG

的實例'B'是** **總是對澆注料' A' ... –

[我如何測試某個對象是D中某個特定類的實例？]（http：// stackover flow.com/questions/8994076/how-do-i-test-that-an-object-is-an-instance-of-a-particular-class-in-d） – DejanLekic

回答

按照d手動你會做：

if (cast(A) b) { 
    // b is an instance of A 
} else { 
    // b is not an instance of A 
}

參考文獻：

Expressions in D

來源

2013-06-30 13:24:19 nif

謝謝你，我到底在找什麼。 – NPG

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