473,503 Members | 1,686 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

error C2912: explicit specialization; ... is not a specialization of a function template

Can anyone give me a simple work around to fix this compiler error on VC7.1

.....cpp(23) : error C2912: explicit specialization; 'bool Equal<_F32>(const
_F32::type,const _F32::type)' is not a specialization of a function template

For this code:

template< class T >
inline bool Equal( const typename T::type v0,
const typename T::type v1 )
{
return v0 == v1;
}
template<>
inline bool Equal< _F32 >( const _F32::type v0, // error occurs at this line

const _F32::type v1 )
{
return fabs( v0 - v1 ) < _F32::epsilon;
}

EnderJSC
Nov 17 '05 #1
1 6656
Jo**********@hotmail.com wrote:
Can anyone give me a simple work around to fix this compiler error on VC7.1

....cpp(23) : error C2912: explicit specialization; 'bool Equal<_F32>(const
_F32::type,const _F32::type)' is not a specialization of a function template

For this code:

template< class T >
inline bool Equal( const typename T::type v0,
const typename T::type v1 )
{
return v0 == v1;
}
template<>
inline bool Equal< _F32 >( const _F32::type v0, // error occurs at this line

const _F32::type v1 )
{
return fabs( v0 - v1 ) < _F32::epsilon;
}

EnderJSC

If you change 'typename T::type' in your main template it removes the
error and give a template function which is a lot easier to use ie:

template< class T >
inline bool Equal( const T v0,
const T v1 )
{
return v0 == v1;
}

template<>
inline bool Equal( const _F32::type v0,
const _F32::type v1 )
{
return fabs( v0 - v1 ) < _F32::epsilon;
}

Now the compiler can deduct the template type for most cases so you can
just write:
int a=1;
int b=2;
cout << Equal(a,b) << endl; // Uses general template
_F32::type c=1;
_F32::type d=2;
cout << Equal(c,d) << endl; // Uses specialization

PJakobse
Nov 17 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
1823
by: CoolPint | last post by:
I would be grateful if someone could point out if I am understanding correctly and suggest ways to improve. Sorry for the long message and I hope you will kindly bear with it. I have to make it...
5
2222
by: Andy | last post by:
Hi, I got a little confused on 'instantiation' and 'specialization', espcially for explicit instantiation and explicit sepcialization. Can anybody explain the difference? Thanks a lot! ...
1
1983
by: Bill Rubin | last post by:
The following code gives VC++ 7.1 compiler errors C2785 and C2912 template<class U> struct Trait {typedef double result;} template<class T> typename Trait<T>::result foo() template<> typename...
1
1968
by: ranges22 | last post by:
****************************************************************** I am compiling a librarry which has a .h file containing th following:...
1
1478
by: keppensde | last post by:
Hi, I'm trying to compile the following code with VC++ 2003.net. ( The real code is a bit different, but I made a small example that does not make sense, but it shows the problem ) The code...
2
3909
by: Nick | last post by:
I'm learning C++ and ran into a compile error using Visual C++ 2005 Express on the following example program (located at http://www.cplusplus.com/doc/tutorial/templates.html): // template...
4
3339
by: stinos | last post by:
Hi All! suppose a class having a function for outputting data somehow, class X { template< class tType > void Output( const tType& arg ) { //default ToString handles integers/doubles
2
7676
by: Barry | last post by:
The following code compiles with VC8 but fails to compiles with Comeau online, I locate the standard here: An explicit specialization of any of the following:
7
2535
by: (2b|!2b)==? | last post by:
I have a class template. Each of the instantiations implements a method in the class template differently, so I (need?) to use template speciaization. My question is this, when writing the...
0
7087
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
7281
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
1
6993
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
7462
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
5579
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
0
4675
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and...
0
3168
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The...
0
1514
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated ...
1
737
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.