On Tue, 23 Mar 2010 03:25:25 -0400, Zólyomi István
<[email protected]> wrote:
Hi,
recently I've been experimenting with the metaprogramming capabilities
of the new dmd 2.042 compiler. I think I've found a bug, but since I'm
still not really experienced with D, please confirm if so. I've reduced
the test case to the following code:
import std.metastrings;
// dummy ctfe-capable function needed to reproduce the error
long parseLong(string timeStr) { return 42; }
// ctfe-capable function to demonstrate that a value is calculated in
compile-time
string longToStr(long val)
{
if (val < 10) { return "" ~ cast(char)(val + '0'); }
else { return longToStr(val / 10) ~ longToStr(val % 10); }
}
void main(string[] args)
{
const long mylong = parseLong("mystring");
pragma(msg, "fine ", longToStr(mylong) ); // compiles and prints
pragma(msg, "bug? ", std.metastrings.toStringNow!(mylong) ); // error
}
The compiler output is
fine 42
bug? c:\Program Files\.....\src\phobos\std\metastrings.d(97): Error:
expression mylong < 0L is not constant or does not evaluate to a bool
Note that parseLong() is needed to reproduce the bug, if a constant is
written instead of mylong, it works just fine. Am I missing something?
I think it's a bug. Please file
http://d.puremagic.com/issues/enter_bug.cgi
-Steve
