Re: partial specialization

From:
"Igor Tandetnik" <itandetnik@mvps.org>
Newsgroups:
microsoft.public.vc.language
Date:
Wed, 2 Apr 2008 22:21:23 -0400
Message-ID:
<uXN$rFTlIHA.3780@TK2MSFTNGP06.phx.gbl>
"Jack Hanebach" <firstname@lastname.net> wrote in message
news:u53ZcVOlIHA.4712@TK2MSFTNGP04.phx.gbl

Given:

template<typename T1, typename T2>
struct A
{
void foo() {}
};

Yet, according to VC8 and comeau, we cannot partially
specialize A::foo() like that:

template<typename T>
void A<T, double>::foo() {}


There ain't no such thing as partial specialization of function
templates. You can simulate it by delegating to a class template, which
in turn can be partially specialized:

template <typename T1, typename T2>
struct FooImpl {
  static void foo(A* pThis) {};
};

template<typename T1, typename T2>
struct A
{
    void foo() { FooImpl<T1, T2>::foo(this); }
};

// Partial specialization
template<typename T>
struct FooImpl<T, double>
{
    static void foo(A* pThis) {}
};

--
With best wishes,
    Igor Tandetnik

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