\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.12.2 - Profiling tools, Hash Map, Union-find, Modifiers
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UniqueHashFunction Concept Reference
Profiling Tools, Hash Map, Union-find, Modifiers Reference » Concepts

Definition

UniqueHashFunction is a concept for a hash function with unique hash values. An instance hash for a model of the UniqueHashFunction concept is a function object. It maps objects of its domain type Key to the integral image type std::size_t. The image values have to be unique for all keys in the domain type Key.

Has Models:
CGAL::Handle_hash_function
See also
CGAL::Unique_hash_map<Key,Data,UniqueHashFunction>

Types

typedef std::size_t result_type
 type of the hash value.
 

Creation

 UniqueHashFunction (const UniqueHashFunction &hash2)
 copy constructor.
 
UniqueHashFunction & operator= (const UniqueHashFunction &hash2)
 assignment.
 

Operations

std::size_t operator() (const Key &key)
 returns a unique hash value for the key value.