🚀 go-pugleaf

In article AC60F6E1966821CF0@sleipner.nts.mh.se, lars.farm@nts.mh.se (Lars Farm) writes:
>In article <41b09t$ltj@engnews2.Eng.Sun.COM>, clamage@Eng (Steve Clamage) wrote:
>
>>In the mean time, you could write a specialization of Foo<X>::compare
>>that throws an exception or invokes "assert(0)" to allow your code
>>to compile and link. That is, for example, if you use Foo<complex>,
>>you could provide the specialization
>>	int Foo<complex>::compare(const complex&) { assert(0); return 0; }
>>which will prevent the compiler from generating a version from the template,
>>and will thus allow your program to compile and link.
>
>Can you specialize just that one function for complex 

Yes.

>or do you have to
>specialize the whole class Foo<complex> with all its members to change the
>implementation of Foo<complex>::compare?

No. You can provide individual specializations for selected member
functions of a class if you wish. Often the template version of some
functions is acceptable, but others need a different implementation
than the version supplied by the template. This is an extreme example
where you cannot implement 'compare' at all: mathematical complex
numbers are not well-ordered.

---
Steve Clamage, stephen.clamage@eng.sun.com



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