\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.8.1 - Kinetic Framework
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Kinetic::Key Concept Reference
Other Concepts

Definition

The concept Key is a unique identifier for something in some sort of table. In general, they can be only created by the table and are returned when a appropriate new_foo() method is called on the table. There are two classes of values for a Key, valid and invalid. The latter cannot refer to something in a table. Use the method is_valid() to differentiate.

Has Models:

CGAL::Kinetic::Simulator::Event_key

CGAL::Kinetic::Active_objects_vector::Key

Public Member Functions

 Key ()
 The default constructor is guaranteed to construct an invalid key (i.e. one which is false when cast to a bool.
 

Operations

bool is_valid () const
 This method returns false if the key was created using the default constructor or was otherwise created to be invalid.
 
std::ostream & operator<< (std::ostream &, Key)
 Write a text description of the key to a standard stream.