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Bug 5471 – Delegates with qualified value params can't be implicitly cast

Status: RESOLVED
Resolution: DUPLICATE
Severity: normal
Priority: P2
Component: dmd
Product: D
Version: D2
Platform: Other
OS: Windows
Creation time: 2011-01-21T06:55:00Z
Last change time: 2011-06-15T23:36:12Z
Assigned to: nobody
Creator: eatingstaples

Attachments

ID	Filename	Summary	Content-Type	Size
873	main.d	Code demonstrating the problem.	application/octet-stream	775

Comments

Comment #0 by eatingstaples — 2011-01-21T06:55:47Z

Created attachment 873 Code demonstrating the problem. Delegates with value-type parameters which are qualified with things like const or immutable can't be cast to delegates which have the same parameters, but differently-qualified. Function pointers do not have this problem.

Comment #1 by yebblies — 2011-06-15T23:36:12Z

This is delegate contravariance, and is not going to happen. *** This issue has been marked as a duplicate of issue 3075 ***