Re: Problems with template specializations.

From:
Thomas Maeder <maeder@glue.ch>
Newsgroups:
comp.lang.c++.moderated
Date:
Thu, 23 Aug 2007 13:02:47 CST
Message-ID:
<m27inmxk00.fsf@glue.ch>
iCoder <iFired@gmail.com> writes:

template <typename T, typename U>
class CheckMulti
{
    public:
    void This() { std::cout << "Basic type\n"; }
};

template <typename U>
    template <typename T1, typename U1>
class CheckMulti< CheckMulti<T1,U1>, U >
{
    public:
    void This() { std::cout << "CheckMulti type\n"; }
};

CheckMulti<int,char> basic2;
basic2.This();
CheckMulti< CheckMulti<int,char>, char > cm2;
cm2.This();

The expected outcome is Basic type CheckMulti type in consecutive
lines... but to my surprise, the outcome is Basic type Basic type..
What am I doing wrong..


You are using a syntax of which I'm astonished that it is accepted.

template <typename U, typename T1, typename U1>
class CheckMulti< CheckMulti<T1,U1>, U >

causes

Basic type
CheckMulti type

to be printed.

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