Re: How use Predicate (alias pred = "a*b")?

[Marcone via Digitalmars-d-learn]

On Thursday, 13 May 2021 at 21:38:25 UTC, Adam D. Ruppe wrote:
On Thursday, 13 May 2021 at 21:30:43 UTC, Marcone wrote:
template foo(alias pred = "a*b"){
        void foo(int x, int y){
                writeln(x.unaryFun!pred);

First, you really shouldn't use these at all. instead of a 
string, just pass an actual function to the thing as the 
predicate.

but if you must use it, unaryFun has one argument, so just a. 
if you want a and b, two arguments, that's binaryFun.

This is just a simple example of how it works. I won't use it. 
However, I believe it will be very useful for meta programming.