Re: inheritance bug?

> >What about doing #2 but allowing an optional override keyword if you
> >want the compiler to check your spelling?
> >  
> This sounds like a reasonable compromise.

Seems like a compiler switch to change the warning level, not language
syntax.

One motivation for virtual and override in C# was performance; the
other motivation was making it easier to ensure new code versions do
not break, at the cost of making it more difficult to extend code in
subclasses. http://www.artima.com/intv/nonvirtual.html

Been a little concerned about what it will be like fixing-up method
declarations when hierarchies change in a codebase - the cost of having
separate declarations and implementations. (Really don't make typos in
method names - copy and paste fixed that a longtime ago. Similarly edit
replace fixed that problem for name changes.)

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