How to concatenate a tuple of strings at compile time?

[user1205]

On Saturday, 6 January 2018 at 19:35:33 UTC, paul wrote:
> Hi!
>
> How to concatenate  a tuple of strings at compile time?
> [...]

Hello, this simple template does the job:

```
template staticCat(T...)
if (T.length)
{
     static if (T.length == 1)
         enum staticCat = T[0];
     else static if (T.length == 2)
         alias staticCat = staticCat!(T[0] ~ T[1]);
     else static if (T.length > 2)
         alias staticCat = staticCat!(T[0] ~ T[1], T[2..$]);
}

enum elems1 = tuple("foo", "bar");
enum elems2 = tuple("0", "1", "2");
enum elems3 = tuple("a");
```

pragma(msg, staticCat!(elems1.expand));
pragma(msg, staticCat!(elems2.expand));
pragma(msg, staticCat!(elems3.expand));

There might be other solutions, maybe even in std.meta.