[Issue 9523] New: std.conv.to will no longer convert enums to themselves

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9523

           Summary: std.conv.to will no longer convert enums to themselves
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: regression
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: jmdavisProg at gmx.com


--- Comment #0 from Jonathan M Davis <jmdavisProg at gmx.com> 2013-02-16 20:51:30 PST ---
This compiled with 2.061

import std.conv;

enum E { a }

void main()
{
    auto month2 = to!E(E.a);
}

but does not compile with the current beta for 2.062. Rather, it gives the
error:

/home/jmdavis/dmd2/linux/bin/../../src/phobos/std/conv.d(274): Error: template
std.conv.toImpl matches more than one template declaration,
/home/jmdavis/dmd2/linux/bin/../../src/phobos/std/conv.d(330):toImpl(T, S)(S
value) if (isImplicitlyConvertible!(S, T) && !isEnumStrToStr!(S, T) &&
!isNullToStr!(S, T)) and
/home/jmdavis/dmd2/linux/bin/../../src/phobos/std/conv.d(1654):toImpl(T, S)(S
value) if (is(T == enum) && is(S : OriginalType!(T)) &&
!isFloatingPoint!(OriginalType!(T)) && !isSomeString!(OriginalType!(T)))
q.d(7): Error: template instance std.conv.to!(E).to!(E) error instantiating

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