[Issue 6732] New: static assert fails on true expression

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6732

           Summary: static assert fails on true expression
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2011-09-26 09:14:17 PDT ---
template isDouble(T) {
    enum bool isDouble = __traits(hasMember, T, "x") || is(T == double);
}

void test(T)(T rhs) if (is(T == int)) { }
void test(T)(T rhs) if (isDouble!T) { }

void main()
{
    static assert(__traits(compiles, test(4.5)));  // fail
    test(4.5);  // fine
}

If you comment out the static assert you'll see that the test() call compiles.
Oddly enough if you swap the order of the calls like so:

void main()
{
    test(4.5);
    static assert(__traits(compiles, test(4.5)));
}

Then it works again.

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