More operators inside `is(...)` expressions

[Steven Schveighoffer]

On 8/23/20 6:18 PM, Per Nordlöw wrote:
> On Sunday, 23 August 2020 at 22:11:41 UTC, Steven Schveighoffer wrote:
>> static if (is(int != T))
>> {
>>    // use T
>> }
> 
> Furthermore, what's wrong with allowing
> 
> static if (int is T)
> {
>     // use T
> }
> 
> static if (int !is T)
> {
>     // use T
> }
> 
> ?
> 
> Less syntax for developer to remember.

It becomes confusing when the symbols are not builtins, though it would 
look a lot nicer.

But this is definitely a much more drastic change than just allowing != 
in the existing is-expression. I imagine the changes to the compiler 
would not be simple for this.

-Steve