/usr/include/wx-2.6/wx/hashset.h is in wx2.6-headers 2.6.3.2.2-5ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Name: wx/hashset.h
// Purpose: wxHashSet class
// Author: Mattia Barbon
// Modified by:
// Created: 11/08/2003
// RCS-ID: $Id: hashset.h,v 1.6.2.2 2006/01/18 16:32:38 JS Exp $
// Copyright: (c) Mattia Barbon
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_HASHSET_H_
#define _WX_HASHSET_H_
#include "wx/hashmap.h"
#if wxUSE_STL && defined(HAVE_STL_HASH_MAP)
#if defined(HAVE_EXT_HASH_MAP)
#include <ext/hash_set>
#elif defined(HAVE_HASH_MAP)
#include <hash_set>
#endif
#define _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP )\
typedef WX_HASH_MAP_NAMESPACE::hash_set< KEY_T, HASH_T, KEY_EQ_T > CLASSNAME;
#else // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP)
// this is a complex way of defining an easily inlineable identity function...
#define _WX_DECLARE_HASH_SET_KEY_EX( KEY_T, CLASSNAME, CLASSEXP ) \
CLASSEXP CLASSNAME \
{ \
typedef KEY_T key_type; \
typedef const key_type const_key_type; \
typedef const_key_type& const_key_reference; \
public: \
CLASSNAME() { } \
const_key_reference operator()( const_key_reference key ) const \
{ return key; } \
\
/* the dummy assignment operator is needed to suppress compiler */ \
/* warnings from hash table class' operator=(): gcc complains about */ \
/* "statement with no effect" without it */ \
CLASSNAME& operator=(const CLASSNAME&) { return *this; } \
};
#define _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP )\
_WX_DECLARE_HASH_SET_KEY_EX( KEY_T, CLASSNAME##_wxImplementation_KeyEx, CLASSEXP ) \
_WX_DECLARE_HASHTABLE( KEY_T, KEY_T, HASH_T, CLASSNAME##_wxImplementation_KeyEx, KEY_EQ_T, CLASSNAME##_wxImplementation_HashTable, CLASSEXP, grow_lf70, never_shrink ) \
CLASSEXP CLASSNAME:public CLASSNAME##_wxImplementation_HashTable \
{ \
public: \
_WX_DECLARE_PAIR( iterator, bool, Insert_Result, CLASSEXP ) \
\
wxEXPLICIT CLASSNAME( size_type hint = 100, hasher hf = hasher(), \
key_equal eq = key_equal() ) \
: CLASSNAME##_wxImplementation_HashTable( hint, hf, eq, \
CLASSNAME##_wxImplementation_KeyEx() ) {} \
\
Insert_Result insert( const key_type& key ) \
{ \
bool created; \
Node *node = GetOrCreateNode( key, created ); \
return Insert_Result( iterator( node, this ), created ); \
} \
\
const_iterator find( const const_key_type& key ) const \
{ \
return const_iterator( GetNode( key ), this ); \
} \
\
iterator find( const const_key_type& key ) \
{ \
return iterator( GetNode( key ), this ); \
} \
\
size_type erase( const key_type& k ) \
{ return CLASSNAME##_wxImplementation_HashTable::erase( k ); } \
void erase( const iterator& it ) { erase( *it ); } \
void erase( const const_iterator& it ) { erase( *it ); } \
\
/* count() == 0 | 1 */ \
size_type count( const const_key_type& key ) \
{ return GetNode( key ) ? 1 : 0; } \
}
#endif // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP)
// these macros are to be used in the user code
#define WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME) \
_WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, class )
// and these do exactly the same thing but should be used inside the
// library
#define WX_DECLARE_HASH_SET_WITH_DECL( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL) \
_WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL )
#define WX_DECLARE_EXPORTED_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME) \
WX_DECLARE_HASH_SET_WITH_DECL( KEY_T, HASH_T, KEY_EQ_T, \
CLASSNAME, class WXDLLEXPORT )
// delete all hash elements
//
// NB: the class declaration of the hash elements must be visible from the
// place where you use this macro, otherwise the proper destructor may not
// be called (a decent compiler should give a warning about it, but don't
// count on it)!
#define WX_CLEAR_HASH_SET(type, hashset) \
WX_CLEAR_HASH_MAP(type, hashset)
#endif // _WX_HASHSET_H_
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