[Issue 7210] opCall weird behavior in struct

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7210


Gašper Ažman <gasper.azman at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
                 CC|                            |gasper.azman at gmail.com


--- Comment #1 from Gašper Ažman <gasper.azman at gmail.com> 2012-05-08 10:37:12 PDT ---
This is more about opCall not working for structs whenever a constructor is
present. For instance, this works:

import std.stdio;

struct B {
    int number;
    string word;

    static B opCall(int n) {
        B b = {n, ""};
        return b;
    }
    string opCall(string w)
    {
        word = w;
        return word;
    }
}

void main() {
    auto b = B(3);
    writeln(b("Hello World"));
}

but this doesn't:



import std.stdio;

struct A {
    int number;
    string word;
    this(int n) {
        number = n;
        word = "";
    }
    string opCall(string w)
    {
        word = w;
        return word;
    }
}

int main() {
    auto a = A(3);
    writeln(a("Hello World"));
}

atom at kamichan $ dmd test.d 
test.d(20): Error: constructor test.A.this (int n) is not callable using
argument types (string)
test.d(20): Error: cannot implicitly convert expression ("Hello World") of type
string to int
test.d(18): Error: function D main has no return statement, but is expected to
return a value of type int
atom at kamichan $ dmd
DMD64 D Compiler v2.059

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