Two questions

Steven Schveighoffer schveiguy at
Wed Jan 2 21:56:03 UTC 2019

On 1/2/19 12:38 PM, IM wrote:

> 2- Yesterday I was experimenting with something and I wrote something 
> like the following:
> struct MyType {
>    ...
> }
> void doSomeWork(ref MyType o) {
>     ...
> }
> auto t = MyType(...);
> t.doSomeWork(); // <-- failed to compile.
> Why did the above UFCS call fail to compile? I had to do doSomeWork(t) 
> instead.

With those ... I have to guess.

There are 2 possibilities.

Possibility 1: there is a method named 'doSomeWork' which takes at least 
one parameter. This overrides the UFCS function (member functions always 
win over UFCS).

Possibility 2: All this is actually inside a function or unittest. 
Nested functions cannot participate in UFCS.

Of course, these are guesses. But given the very scant code above, I'm 
not sure I could offer any other suggestions. If neither of those is the 
case, I'd need a working example.


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