• d-bugmail puremagic.com (27/27) Oct 05 2009 http://d.puremagic.com/issues/show_bug.cgi?id=3365

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=3365

           Summary: Safe casts: type modifiers
           Product: D
           Version: future
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: dfj1esp02 sneakemail.com



07:11:53 PDT ---
C++ has const_cast to add or remove const modifier from type. Currently in D
casting to/from const is unsafe as it doesn't protect from type conversions.
Safe variants of const casts can be added with the following syntax:

cast(const)obj; //to const-qualified
cast(~const)obj; //to mutable
cast(immutable)obj; //instead of assumeUnique
cast(~immutable)obj;
cast(shared)obj;
cast(~shared)obj;

I'm not sure whether cast(~const) should behave exactly as cast(~immutable).

P.S. This doesn't impose any additional requirement on the runtime library.

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