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Home/ Questions/Q 6920351
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T10:08:07+00:00 2026-05-27T10:08:07+00:00

struct Foo{ int _a; this(int a){ _a = a; } int opCall(int b){ return

  • 0
struct Foo{

  int _a;

  this(int a){ _a = a; }

  int opCall(int b){ return b * b; }
}

Foo f;
int rt = f(33); //Error: cannot implicitly convert expression ((Foo __ctmp1294 = 0;
                //, __ctmp1294).this(33)) of type Foo to int

I can’t find enough information on opCall in TDPL or the website.

I need both the this() and opCall(), but, when the this() is present, the above code doesn’t work. Do I have to get rid of the constructor?

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  1. Editorial Team
    Editorial Team
    2026-05-27T10:08:08+00:00Added an answer on May 27, 2026 at 10:08 am

    The above code should work, but doesn’t due to bug #6036.

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