String lambdas

[tsbockman via Digitalmars-d]

On Tuesday, 26 April 2016 at 17:58:22 UTC, Andrei Alexandrescu 
wrote:
> One thing we really need in order to 100% replace string 
> lambdas with lambdas is function equivalence.

One significant - but undocumented - feature of unaryFun and 
binaryFun, is that they will auto-import the following modules if 
needed:

     import std.traits, std.typecons, std.typetuple;
     import std.algorithm, std.conv, std.exception, std.math, 
std.range, std.string;

Does anyone actually use this feature?