[Issue 15890] New: IFTI for static array argument length when element type supplied

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15890

          Issue ID: 15890
           Summary: IFTI for static array argument length when element
                    type supplied
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ntrel-pub at mybtinternet.com

dmd 2.070.2 doesn't always support inference of n, but not T, for a static
array argument:

T[n] staticArray(T, size_t n)(T[n] arr)
{
    return arr;
}

unittest
{
    immutable(int)[2] arr = [1,2]; // OK
    immutable(int)[2] isa = [1,2].staticArray!(immutable int); // cannot deduce
    int[2] sa = [1,2].staticArray!(int); // OK
    immutable(int)[2] isa2 = [1,2].staticArray!(immutable int, 2); // OK
}

(staticArray is from a Phobos PR:
https://github.com/D-Programming-Language/phobos/pull/4090).

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