Challenge

[rsw0x via Digitalmars-d]

On Sunday, 30 August 2015 at 10:15:14 UTC, John Colvin wrote:
> import std.algorithm, std.range;
>
> auto foo(R)(R a, immutable int b)
> {
>     return a.map!(x => x + b);
> }
>
> unittest @nogc @safe
> {
>     int[] test = [1,2,3];
>
>     assert(test.foo(3).equal(only(4,5,6)));
> }
>
> Challenge: reimplement `foo` such that above unittest will 
> compile. No cheating with malloc etc. Bonus points if you don't 
> have to implement a modified version of std.algorithm.map

import std.algorithm, std.range;

auto foo(R)(R a, immutable int b)
{
     return a.map!(x => x + b);
}

@nogc @safe unittest
{
     int[3] test = [1,2,3];

     assert(test[].foo(3).equal(only(4,5,6)));
}

does this count?