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## CGAL::Tag_true

### Definition

The class Tag_true is used to define a tag indicating, for example, that a certain feature is available in a class.

#include <CGAL/tags.h>

bool | check_tag ( Tag_true)
|  | returns true.

### See Also

CGAL::Tag_false
CGAL::Number_type_traits<NT> in the Support Library Manual.

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The CGAL Project . Tue, December 21, 2004 .