Re: pure factory function vs immutable(Foo)**

[ag0aep6g via Digitalmars-d-learn]

On 07/10/2017 04:57 PM, ag0aep6g wrote:

----
alias T = int;

T** f(const T** input) pure
{
     T** output;
     return output;
}

void main()
{
     T i;
     T* p = &i;
     immutable T** r = f(&p);
}
----

[...]

Now change `T` to `alias T = immutable int;`. The program gets rejected. The error message is: "cannot implicitly convert expression (f(& p)) of type immutable(int)** to immutable(int**)".

Filed an issue:
https://issues.dlang.org/show_bug.cgi?id=17635