From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2005-05-08 06:06:22
Andy Little wrote:
> "Tobias Schwinger" <tschwinger_at_[hidden]> wrote
>> Static constants in "<type>_constants"-namespaces are also
>> undesirable, because there is no way to select a namespace named
>> "<T>_constants" from within a template.
> FWIW thi would work fine for me:
> typedef std::math::constants<T> math;
> 2 * math::pi * r ;
This looks nice at first glance.
Besides getting rid of the empty parentheses, there are the following disadvantages:
- modularity/extensibility (once constants<T> is defined you can't add constants
- portability (the code above won't compile with BCC)
- there is no way to pass constants as a type template argument
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