I have the ff template class:
template <class T1, class T2class Periodic ;
I have two questions/problems
Q1).
I want to specialize it further into two template classes:
Periodic<Class1 , T2//specialized for class1
Periodic<Class2 , T2//specialized for class2
Q2)
Furthermore, I would like to typedef these new classes, e.g.
typedef Periodic<Class1 , T2MyTemplate1 ;
Is this possible ?
8  1675 
2b|!2b==? wrote:
I have the ff template class:
template <class T1, class T2class Periodic ;
I have two questions/problems
Q1).
I want to specialize it further into two template classes:
Periodic<Class1 , T2//specialized for class1
Periodic<Class2 , T2//specialized for class2
Yes.
tempalate<class Tclass Periodic<Class1 , T{ ...
templlate<class Tclass Periodic<Class2 , T{ ...
Q2)
Furthermore, I would like to typedef these new classes, e.g.
typedef Periodic<Class1 , T2MyTemplate1 ;
Is this possible ?
Not yet. Search for "template typedefs" in the archives.
V
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Victor Bazarov wrote:
2b|!2b==? wrote:
>>I have the ff template class:
template <class T1, class T2class Periodic ;
I have two questions/problems
Q1).
I want to specialize it further into two template classes:
Periodic<Clas s1, T2//specialized for class1
Periodic<Clas s2, T2//specialized for class2
Yes.
tempalate<class Tclass Periodic<Class1 , T{ ...
templlate<class Tclass Periodic<Class2 , T{ ...
Done. Thanks
>>Q2)
Furthermore , I would like to typedef these new classes, e.g.
typedef Periodic<Class1 , T2MyTemplate1 ;
Is this possible ?
Not yet. Search for "template typedefs" in the archives.
V
I looked this up, and came up with the ff struct declaration:
//The follwing is in myheader.h
template<class T>
struct MyStruct
{
typedef Periodic<Class1 , T> Type1;
typedef Periodic<Class2 , T> Type2;
};
MyStruct<Class1 >::Type1 MyTypedef1 ;
MyStruct<Class2 >::Type2 MyTypedef2 ;
//Now in my souce file, I have the following:
#include "myheader.h "
......
MyClass
{
public:
MyClass();
MyClass(const MyClass&);
.....
private:
MyTypedef1 m_type_def1 ; // <- compiler barfs here
};
What am I doing wrong ?
Correction:
This :
template<class T>
struct MyStruct
{
typedef Periodic<Class1 , T Type1;
typedef Periodic<Class2 , T Type2;
};
MyStruct<Class1 >::Type1 MyTypedef1 ;
MyStruct<Class2 >::Type2 MyTypedef2 ;
Should have been posted as:
template<class T>
struct MyStruct
{
typedef Periodic<Class1 , T Type1 ;
typedef Periodic<Class2 , T Type2 ;
};
MyStruct<double MyTypedef1 ;
MyStruct<double MyTypedef2 ;
2b|!2b==? wrote:
Correction:
This :
>template<cla ss T>
struct MyStruct
{
typedef Periodic<Class1 , T Type1;
typedef Periodic<Class2 , T Type2;
};
MyStruct<Class 1>::Type1 MyTypedef1 ;
MyStruct<Class 2>::Type2 MyTypedef2 ;
Should have been posted as:
template<class T>
struct MyStruct
{
typedef Periodic<Class1 , T Type1 ;
typedef Periodic<Class2 , T Type2 ;
};
MyStruct<double MyTypedef1 ;
MyStruct<double MyTypedef2 ;
You probalby meant
typedef MyStruct<double >::Type1 MyTypedef1;
typedef MyStruct<double >::Type2 MyTypedef2;
otherwise they are object declarations.
V
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Please remove capital 'A's when replying by e-mail
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Victor Bazarov wrote:
>
You probalby meant
typedef MyStruct<double >::Type1 MyTypedef1;
typedef MyStruct<double >::Type2 MyTypedef2;
otherwise they are object declarations.
V
Doh !
Of course, you're right - thanks for pointing out my glaring mistake -
time for a fresh cup of coffee maybe ? :P
2b|!2b==? wrote:
Victor Bazarov wrote:
>>
You probalby meant
typedef MyStruct<double >::Type1 MyTypedef1;
typedef MyStruct<double >::Type2 MyTypedef2;
otherwise they are object declarations.
V
Doh !
Of course, you're right - thanks for pointing out my glaring mistake -
time for a fresh cup of coffee maybe ? :P
<shrug>
Either way, ou're not winning anything. You could do
template<class Tstruct Periodic1 {
typedef Periodic<Class1 ,Ttype;
};
and then use it to declare objects this way:
Periodic1<doubl e>::type blah;
instead of remembering
Periodic<Class1 ,doubleblah;
But I don't see much difference. You could of course use 'Periodic1'
(or 'MyStruct') inside another template... Again, not much better
than spelling it out.
I think template typedefs are coming in the next revision of the
language, though.
V
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Please remove capital 'A's when replying by e-mail
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Without actually checking it ...
Wouldn't it be sufficient to say
template <typename T>
typedef typename Periodic<Class1 , TCP1;
Amit Gupta wrote:
Without actually checking it ...
Wouldn't it be sufficient to say
template <typename T>
typedef typename Periodic<Class1 , TCP1;
No. Template typedefs are currently illegal. You need to put them
inside a class template or struct template. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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