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 | Posted by Jonathan M Davis |  Permalink Reply |
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Jonathan M Davis 
| http://d.puremagic.com/issues/show_bug.cgi?id=4971
Summary: to!() fails with static arrays
Product: D
Version: unspecified
Platform: Other
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P2
Component: Phobos
AssignedTo: nobody@puremagic.com
ReportedBy: jmdavisProg@gmx.com
--- Comment #0 from Jonathan M Davis <jmdavisProg@gmx.com> 2010-10-01 22:54:00 PDT ---
This code fails to compile
import std.conv;
import std.stdio;
void main()
{
dchar[7] numStr = "1234567";
writeln(to!long(numStr));
}
with this error
/home/jmdavis/Downloaded_Files/dmd/dmd2/linux/bin/../../src/phobos/std/conv.d(95):
Error: template std.conv.toImpl(T,S) if (!implicitlyConverts!(S,T) &&
isSomeString!(T) && isInputRange!(Unqual!(S)) && isSomeChar!(ElementType!(S)))
toImpl(T,S) if (!implicitlyConverts!(S,T) && isSomeString!(T) &&
isInputRange!(Unqual!(S)) && isSomeChar!(ElementType!(S))) matches more than
one template declaration,
/home/jmdavis/Downloaded_Files/dmd/dmd2/linux/bin/../../src/phobos/std/conv.d(217):toImpl(T,S)
if (isStaticArray!(S)) and
/home/jmdavis/Downloaded_Files/dmd/dmd2/linux/bin/../../src/phobos/std/conv.d(588):toImpl(T,S)
if ((is(S : const(wchar)[]) || is(S : const(dchar)[])) && !isSomeString!(T))
If you use numStr[] instead of numStr, it works. But I see no reason why to!() can't be made to work with a static array. Ideally, it would either turn it into a const ref or a dynamic slice itself, thus avoiding creating a copy, but right now it just fails. Maybe that's just how things go with static arrays, but it seems overly restrictive in this case. to!() shouldn't _need_ a dynamically allocated array.
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