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digitalmars.D.bugs - [Issue 9048] New: Error: base classes expected instead of typeof when instantiating anonymous class

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9048

           Summary: Error: base classes expected instead of typeof when
                    instantiating anonymous class
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: ogondza gmail.com



Unlike, regular classes, anonymous classes seems to be impossible to
instantiate when using typeof expression.

This works perfectly:

  new typeof(this)();
  new typeof(new Object())();

But these

  new class typeof(this) {};
  new class typeof(new Object()) {};

give (on v2.060)

  Error: base classes expected instead of typeof
  Error: { members } expected for anonymous class
  Error: found 'typeof' when expecting ';' following statement

It can be worked around aliasing the type first and then instantiating
anonymous class of the aliased type. However, for an anonymous class it is
necessary to instantiate in one expression.

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Nov 19 2012
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9048


timon.gehr gmx.ch changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |timon.gehr gmx.ch
           Severity|normal                      |enhancement



It is according to the language specification. It is the same parsing error as
the one present in the following code:

class C{}
class D: typeof(new C){}

This is an enhancement.

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Nov 19 2012
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=9048


Kenji Hara <k.hara.pg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE





   new class typeof(this) {};
   new class typeof(new Object()) {};


Using typeof in base class list is allowed in 2.061head, by fixing issue 1353.

*** This issue has been marked as a duplicate of issue 1353 ***

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Nov 20 2012