Enums

[rkj]

Hello. I'm having a problem using enum objects as non-type parameters in class templates. Consider the following code:

enum Team
{

 Chelsea,
 Real Madrid

};

template<class T>
class Player<Team t>
{
 ...
 ...
 class definition

};

This code compiles without giving any sort of errors, but when I try to instantiate the class like this,

Player<Team::Chelsea>* player;

it gives me errors:
'Chelsea' : illegal qualified name in member declaration
'player' : undeclared identifier
syntax error : missing ')' before ';'
syntax error : missing '>' before ';'


whereas when I do this

Player<(Team)1>* player;

, it compiles successfully. i'm confused as to why this happens. Any suggestions would be helpful

Thanks
Rahul

[bnbertha]

I'm not sure if it is causing the error you see, but it will not be happy with the space between Real and Madrid, try using an underscore

[jsmith]

Enums are not objects, nor are they even complete types.
You need:

template< Team T >
class Player {
    // ...
};

and then you instantiate like this:

Player<Chelsea>* player;

(The values defined in an enum are not scoped within the enum.)

[rkj]

I'm sorry. I had used an underscore previously. I did not type it here. And yes, I even tried qualifying the enum values within the enum scope, like this:

Player<Team::Chelsea>* player;

It gives the same errors.
Please help

[QWERTYman]

From my experience, the scope-resolution operator (::) isn't used with enumerations.
Just try:
Player<Chelsea>* player;, instead of
Player<Team::Chelsea>*player;.

[Zaita]

You cannot use scope-resolution on enumerated types. Only namespaces or classes.