mirror of https://github.com/CGAL/cgal
51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
// ============================================================================
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//
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// Copyright (c) 1997-2000 The CGAL Consortium
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//
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// This software and related documentation is part of an INTERNAL release
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// of the Computational Geometry Algorithms Library (CGAL). It is not
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// intended for general use.
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//
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// ----------------------------------------------------------------------------
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//
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// release : $CGAL_Revision$
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// release_date : $CGAL_Date$
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//
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// file : include/CGAL/Handle_hash_function.h
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// package : Hash_map
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// chapter : STL_Extensions
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//
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// revision : $Revision$
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// revision_date : $Date$
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//
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// author(s) : Michael Seel <seel@mpi-sb.mpg.de>
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// Lutz Kettner <kettner@inf.ethz.ch>
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// maintainer : Michael Seel <seel@mpi-sb.mpg.de>
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// coordinator : Michael Seel <seel@mpi-sb.mpg.de>
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//
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// implementation: Hash Map by chained hashing, default hash function
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// ============================================================================
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#ifndef CGAL_HANDLE_HASH_FUNCTION_H
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#define CGAL_HANDLE_HASH_FUNCTION_H
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#include <CGAL/basic.h>
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#include <cstddef>
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CGAL_BEGIN_NAMESPACE
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struct Handle_hash_function {
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typedef std::size_t result_type;
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template <class H>
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std::size_t operator() (const H& h) const {
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return std::size_t(&*h) /
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sizeof( typename std::iterator_traits<H>::value_type);
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}
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};
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CGAL_END_NAMESPACE
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#endif // CGAL_HANDLE_HASH_FUNCTION_H
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// EOF
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