Named Arguments Status Update - Overloading by name

[Walter Bright]

On 1/11/2024 12:33 PM, Dennis wrote:
> On Thursday, 11 January 2024 at 19:21:46 UTC, Walter Bright wrote:
>> It's ok if the error is detected after instantiation. It can be detected by 
>> testing to see if the mangled signature (which is generated for the type of 
>> the function) already exists.
> 
> That is the second option I listed in my opening post, which can be implemented 
> easily.
> However, it would create a compile time 'race condition': the `f!short` 
> instantiation which dmd sees first may succeed, but any subsequent attempts will 
> fail.
> 
> I don't know if this will result in inscrutable errors in practice, but it very 
> well may.


string f(T)(T x) if (T.sizeof <= 2) { return "x"; }
string f(T)(T y) if (T.sizeof >= 2) { return "y"; }

Then the only thing to do is disallow an overload that differs only in the 
parameter names.