June 14, 2004 Return type overloading | ||||
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Has function return type overloading been considered for D? It might be useful for some scenarios. For example, in the code:: int get2() { return 2; } float get2() { return 2.0; } the function body that gets called depends on the expected type of the value:: int i; float f; i = get2(); //the int version body of get2() is called f = get2(); //the float version is called f = cast(int)get2(); //the int version is called, and the value is implicitly //casted to a float f = cast(float)cast(int)get2(); //the int version is called, and the value is //explicitly casted to a float I'm not sure about what to do if the expected type can't be determined. Perhaps we should require an explicit cast? Consider this:: f = 2 + get2(); I'm sure there are loads of other ambiguities I haven't thought about. I'm not even sure if it's a good idea, but it's an idea worth considering nevertheless. -- Marti |
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