[Issue 22433] New: ITFI fails with alias declared inside template, used in function signature

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22433

          Issue ID: 22433
           Summary: ITFI fails with alias declared inside template, used
                    in function signature
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: iamthewilsonator at hotmail.com

template foo(I)
{
    alias Idx = int;
    void foo(I,Idx,int) {}
}

struct A {}
void main()
{
    A a;
    //Fails: 
    //    Error: undefined identifier `Idx`"
    //    Error: template `onlineapp.write` cannot deduce function from
argument types `!()(A, int, int)`, candidates are:
    //        `foo(I)(I, Idx, int)`
    a.foo(0,0); // 1

    //Passes
    a.foo!A(0,0); // 2
}

reordering the statements 1 and 2 still results in failure.

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