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digitalmars.D.learn - Final class

reply "Daniel Kozak" <kozzi11 gmail.com> writes:
Are all methods in final class non-virtual or must be explicity 
marked as a final too?
Jul 11 2013
parent reply Jonathan M Davis <jmdavisProg gmx.com> writes:
On Friday, July 12, 2013 07:03:07 Daniel Kozak wrote:

 Are all methods in final class non-virtual or must be explicity
 marked as a final too?


They're virtual if they override base class functions, but they're definitely 
all final. So, the compiler _should_ optimize the functions in a final class 
which don't override anything so that they're non-virtual. However, I'm not 
sure that there's actually any guarantee that final methods which don't 
override anything will actually be made non-virtual. It's an optimization 
based on the fact that the compiler can determine that it can be made non-
virtual rather than it explicitly being made non-virtual by the programmer, so 
the compiler might not do it. It _should_, but I'm not sure that it's 
guaranteed to.

- Jonathan M Davis
Jul 11 2013
parent "Daniel Kozak" <kozzi11 gmail.com> writes:
On Friday, 12 July 2013 at 05:13:44 UTC, Jonathan M Davis wrote:

 On Friday, July 12, 2013 07:03:07 Daniel Kozak wrote:

 Are all methods in final class non-virtual or must be explicity
 marked as a final too?


 They're virtual if they override base class functions, but 
 they're definitely
 all final. So, the compiler _should_ optimize the functions in 
 a final class
 which don't override anything so that they're non-virtual. 
 However, I'm not
 sure that there's actually any guarantee that final methods 
 which don't
 override anything will actually be made non-virtual. It's an 
 optimization
 based on the fact that the compiler can determine that it can 
 be made non-
 virtual rather than it explicitly being made non-virtual by the 
 programmer, so
 the compiler might not do it. It _should_, but I'm not sure 
 that it's
 guaranteed to.

 - Jonathan M Davis


Thanks
Jul 11 2013