A low-priority enhancement suggestion:


import std.typecons: tuple;
void main() {
    immutable t = tuple([1, 2]);
}


dmd 2.064beta3 gives:

test.d(3): Error: cannot implicitly convert expression (tuple([1, 2])) of type Tuple!(int[]) to immutable(Tuple!(int[]))

I presume built-in tuples could do this too.

To do this with Phobos-defined tuples, there should be a way to know that the input dynamic array is pure. I don't know if and how this can be done.