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digitalmars.D.bugs - [Issue 6527] New: Ambiguous mangling of inout parameters


           Summary: Ambiguous mangling of inout parameters
           Product: D
           Version: 2.040
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: sean invisibleduck.org

--- Comment #0 from Sean Kelly <sean invisibleduck.org> 2011-08-18 09:26:16 PDT
An inout(T) function parameter is represented as "NgT" (ie. Wild T, per the
ABI).  'N' is already used as the signifier for a FuncAttr, so this function:

   nothrow inout(int) fn(inout(int) x) { return x; }

Is mangled as:


Parsing this, I have to explicitly recognize "Ng" as not a FuncAttr but rather
the beginning of an inout parameter type, rewind the parse location (admittedly
by one char) and jump out of the FuncAttr parse loop to deal with it.  Couldn't
some other label be used to mark an inout parameter so this conflict doesn't
exist?  I guess TypeNewArray might have this same problem ("Ne") except that it
isn't even used in D2 right now so I suppose that's a non-issue.

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Aug 18 2011