how to return map(fn)

[Ali Çehreli]

On 2/22/22 05:53, steve wrote:

 > What I was trying
 > to return is function that can then be applied to e.g. an array.

I think an eponymous template that defines an alias as in your original 
post can be used as well:

template mappified(alias func) {
   import std.algorithm : map;
   alias mappified = map!func;
}

void main() {
   import std.stdio;
   writeln([1,2].mappified!(a => a * 10));
}

There is std.functional which includes function composition tools:

   https://dlang.org/phobos/std_functional.html

Ali