private constants

[anon]

Hello

Can anyone tell me how to define constants private to a implementation
file. That is, I do not want to put them in a global namespace, but to
narrow their scope only to one implementation file.

Will this work:
static const int i=1;
?

Or is this better:

namespace
{
const int i=1;
}
?


If I do this:
const int i = 1;
am I going to pollute global namespace?


Thanks in advance.

 

[Victor Bazarov]

Hello

Can anyone tell me how to define constants private to a implementation
file. That is, I do not want to put them in a global namespace, but to
narrow their scope only to one implementation file.

An anonymous namespace is usually recommended for making names appear
only in the current translation module.

Will this work:
static const int i=1;
?

Yes, certainly. Actually 'static' is superfluous in this case.

Or is this better:

namespace
{
const int i=1;
}
?

No, it's not better.

If I do this:
const int i = 1;
am I going to pollute global namespace?

Nope. A const that is not explicitly declared 'extern' has internal
linkage and hence unavailable from other modules.

V