Mixin and map

[Dennis Ritchie via Digitalmars-d-learn]

Hi,
Can you please tell how to make map worked correctly. I want to 
program published [2, 3, 4, 5, 6].

-----
import std.stdio;
import std.algorithm;

string print(string s)
{
        return `writeln(` ~ s ~ `);`;
}

void main()
{
        auto arr = [1, 2, 3, 4, 5];

        mixin(print(`arr.map!(t => t++)`)); // prints [1, 2, 3, 4, 5]
}
-----
http://ideone.com/yEmzA4