Return data from different types of conditional operation
wobbles via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Thu Apr 23 02:54:01 PDT 2015
On Thursday, 23 April 2015 at 09:48:21 UTC, Dennis Ritchie wrote:
> Hi,
> Why the program can not return different types of data from the
> conditional operator?
>
> -----
> import std.stdio;
>
> auto foo() {
>
> if (true) {
> return 0;
> } else
> return "true";
> }
>
> void main() {
>
> writeln(foo);
> }
Because 0 is an int and "true" is a string.
They're totally different types, and in a statically typed
language like D, that just wont work.
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