[Issue 10555] New: enumerator can no longer increment beyond maximum of initializer

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10555

           Summary: enumerator can no longer increment beyond maximum of
                    initializer
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: r.sagitario at gmx.de


--- Comment #0 from Rainer Schuetze <r.sagitario at gmx.de> 2013-07-06 06:03:46 PDT ---
I'm not sure if the new behaviour in git HEAD is desired or not, but this code
used to compile until one or two weeks ago:

enum A
{
    A0
}
enum B
{
    B0 = A.A0,
    B1
}

Now it errors out with

Error: enum test.B overflow of enum value cast(B)cast(A)0

because dmd does not want to increment A0.

More strange things:

////////////////////////
enum A
{
    A0
}
enum B
{
    B0 = A.A0,
    B1 = A.A0 + 1
}
Error: cannot implicitly convert expression (1) of type int to A

though this works

enum A
{
    A0
}
enum B
{
    B0 = A.A0 + 0,
    B1
}

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