manually call opUnary

[Algo via Digitalmars-d-learn]

On Tuesday, 4 November 2014 at 07:49:15 UTC, Rikki Cattermole 
wrote:
> On 4/11/2014 8:19 p.m., Algo wrote:
>> Is it possible?
>> As in
>> {
>>      int a;
>>      a.opUnary!"++"();
>> }
>> no property 'opUnary' for type 'int'
>
> For primitives it doesn't look like it.
>
> To confirm this, we'll first figure out what TypeInfo is used 
> for it:
> pragma(msg, typeid(int).name);
>
> /d133/f260.d(16): Error: no property 'name' for type 
> 'object.TypeInfo'
> /d133/f260.d(16):        while evaluating pragma(msg, 
> (&typeid(int)).name)
>
> So straight object.TypeInfo. Here is it in druntime:
> https://github.com/D-Programming-Language/druntime/blob/master/src/object.di#L66
>
> Because of this, it means its most definitely handled by the 
> compiler itself.
> But you can freely do this for classes:
>
> import std.stdio;
>
> class Foo {
> 	void opUnary(string op)() {
> 		writeln(op);
> 	}
> }
>
> void main() {
> 	Foo foo = new Foo;
>
> 	foo++;
> 	foo.opUnary!"--";
> }
>
> Outputs:
> ++
> --

Nice investigation, thanks!
In practice this isn't an issue, i'll just use the lambda 
expression previously posted.