[Issue 12166] Template Argument Pattern Matching Fails for Struct With Multiple Nested Template Arguments

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12166



--- Comment #3 from Kenji Hara <k.hara.pg at gmail.com> 2014-02-19 23:32:31 PST ---
(In reply to comment #2)
> Sorry, add:
[snip]

So, what version do you use? The full test case:

struct Zero    {}
struct Succ(a) {}

alias One   = Succ!Zero;
alias Two   = Succ!One;
alias Three = Succ!Two;
alias Four  = Succ!Three;

struct Nil {}
struct Cons(a, b) {}

alias list1 = Cons!(Three, Cons!(Two, Cons!(Four, Cons!(One, Nil))));

alias numlHead(L: Cons!(a, b), a, b) = a;

alias numlTail(L: Cons!(a, b), a, b) = b;

void main()
{
    pragma(msg, numlHead!list1);
}

compiles with 2.064 (2.063 and earlier does not support new alias syntax). I
cannot see the issue.

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