[Issue 6948] New: Possible bug in compiler or documentation regarding signature of opCmp()

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6948

           Summary: Possible bug in compiler or documentation regarding
                    signature of opCmp()
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: kukac at mailinator.com


--- Comment #0 from kukac at mailinator.com 2011-11-14 13:07:07 PST ---
The documentation http://www.digitalmars.com/d/2.0/arrays.html writes that "For
the .sort property to work on arrays of structs or unions, the struct or union
definition must define the function: int opCmp(S) or int opCmp(S*)". That is
misleading, as, in my experience, a struct must implement exactly "int
opCmp(ref const S) const" in order to get .sort work. Signatures which are a
bit different do not work.

The documentation should be updated as soon as possible, either informing the
programmer about a current bug in the compiler, or clearly stating that only
this signature works! In addition, I think that the compiler should warn about
using a likely incorrect signature.

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