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work around (harmless) warnings in VC7 release build
[wxWidgets.git] / include / wx / hashset.h
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1/////////////////////////////////////////////////////////////////////////////
2// Name: wx/hashset.h
3// Purpose: wxHashSet class
4// Author: Mattia Barbon
5// Modified by:
6// Created: 11/08/2003
7// RCS-ID: $Id$
8// Copyright: (c) Mattia Barbon
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12#ifndef _WX_HASHSET_H_
13#define _WX_HASHSET_H_
14
15#include "wx/hashmap.h"
16
17// see comment in wx/hashmap.h which also applies to different standard hash
18// set classes
19
20#if wxUSE_STL && \
21 (defined(HAVE_STD_UNORDERED_SET) || defined(HAVE_TR1_UNORDERED_SET))
22
23#if defined(HAVE_STD_UNORDERED_SET)
24 #include <unordered_set>
25 #define WX_HASH_SET_BASE_TEMPLATE std::unordered_set
26#elif defined(HAVE_TR1_UNORDERED_SET)
27 #include <tr1/unordered_set>
28 #define WX_HASH_SET_BASE_TEMPLATE std::tr1::unordered_set
29#else
30 #error Update this code: unordered_set is available, but I do not know where.
31#endif
32
33#elif wxUSE_STL && defined(HAVE_STL_HASH_MAP)
34
35#if defined(HAVE_EXT_HASH_MAP)
36 #include <ext/hash_set>
37#elif defined(HAVE_HASH_MAP)
38 #include <hash_set>
39#endif
40
41#define WX_HASH_SET_BASE_TEMPLATE WX_HASH_MAP_NAMESPACE::hash_set
42
43#endif // different hash_set/unordered_set possibilities
44
45#ifdef WX_HASH_SET_BASE_TEMPLATE
46
47// we need to define the class declared by _WX_DECLARE_HASH_SET as a class and
48// not a typedef to allow forward declaring it
49#define _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP ) \
50CLASSEXP CLASSNAME \
51 : public WX_HASH_SET_BASE_TEMPLATE< KEY_T, HASH_T, KEY_EQ_T > \
52{ \
53public: \
54 explicit CLASSNAME(size_type n = 3, \
55 const hasher& h = hasher(), \
56 const key_equal& ke = key_equal(), \
57 const allocator_type& a = allocator_type()) \
58 : WX_HASH_SET_BASE_TEMPLATE< KEY_T, HASH_T, KEY_EQ_T >(n, h, ke, a) \
59 {} \
60 template <class InputIterator> \
61 CLASSNAME(InputIterator f, InputIterator l, \
62 const hasher& h = hasher(), \
63 const key_equal& ke = key_equal(), \
64 const allocator_type& a = allocator_type()) \
65 : WX_HASH_SET_BASE_TEMPLATE< KEY_T, HASH_T, KEY_EQ_T >(f, l, h, ke, a)\
66 {} \
67 CLASSNAME(const WX_HASH_SET_BASE_TEMPLATE< KEY_T, HASH_T, KEY_EQ_T >& s) \
68 : WX_HASH_SET_BASE_TEMPLATE< KEY_T, HASH_T, KEY_EQ_T >(s) \
69 {} \
70}
71
72#else // no appropriate STL class, use our own implementation
73
74// this is a complex way of defining an easily inlineable identity function...
75#define _WX_DECLARE_HASH_SET_KEY_EX( KEY_T, CLASSNAME, CLASSEXP ) \
76CLASSEXP CLASSNAME \
77{ \
78 typedef KEY_T key_type; \
79 typedef const key_type const_key_type; \
80 typedef const_key_type& const_key_reference; \
81public: \
82 CLASSNAME() { } \
83 const_key_reference operator()( const_key_reference key ) const \
84 { return key; } \
85 \
86 /* the dummy assignment operator is needed to suppress compiler */ \
87 /* warnings from hash table class' operator=(): gcc complains about */ \
88 /* "statement with no effect" without it */ \
89 CLASSNAME& operator=(const CLASSNAME&) { return *this; } \
90};
91
92#define _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, CLASSEXP )\
93_WX_DECLARE_HASH_SET_KEY_EX( KEY_T, CLASSNAME##_wxImplementation_KeyEx, CLASSEXP ) \
94_WX_DECLARE_HASHTABLE( KEY_T, KEY_T, HASH_T, CLASSNAME##_wxImplementation_KeyEx, KEY_EQ_T, CLASSNAME##_wxImplementation_HashTable, CLASSEXP, grow_lf70, never_shrink ) \
95CLASSEXP CLASSNAME:public CLASSNAME##_wxImplementation_HashTable \
96{ \
97public: \
98 _WX_DECLARE_PAIR( iterator, bool, Insert_Result, CLASSEXP ) \
99 \
100 wxEXPLICIT CLASSNAME( size_type hint = 100, hasher hf = hasher(), \
101 key_equal eq = key_equal() ) \
102 : CLASSNAME##_wxImplementation_HashTable( hint, hf, eq, \
103 CLASSNAME##_wxImplementation_KeyEx() ) {} \
104 \
105 Insert_Result insert( const key_type& key ) \
106 { \
107 bool created; \
108 Node *node = GetOrCreateNode( key, created ); \
109 return Insert_Result( iterator( node, this ), created ); \
110 } \
111 \
112 const_iterator find( const const_key_type& key ) const \
113 { \
114 return const_iterator( GetNode( key ), this ); \
115 } \
116 \
117 iterator find( const const_key_type& key ) \
118 { \
119 return iterator( GetNode( key ), this ); \
120 } \
121 \
122 size_type erase( const key_type& k ) \
123 { return CLASSNAME##_wxImplementation_HashTable::erase( k ); } \
124 void erase( const iterator& it ) { erase( *it ); } \
125 void erase( const const_iterator& it ) { erase( *it ); } \
126 \
127 /* count() == 0 | 1 */ \
128 size_type count( const const_key_type& key ) const \
129 { return GetNode( key ) ? 1 : 0; } \
130}
131
132#endif // STL/wx implementations
133
134
135// these macros are to be used in the user code
136#define WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME) \
137 _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, class )
138
139// and these do exactly the same thing but should be used inside the
140// library
141#define WX_DECLARE_HASH_SET_WITH_DECL( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL) \
142 _WX_DECLARE_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME, DECL )
143
144#define WX_DECLARE_EXPORTED_HASH_SET( KEY_T, HASH_T, KEY_EQ_T, CLASSNAME) \
145 WX_DECLARE_HASH_SET_WITH_DECL( KEY_T, HASH_T, KEY_EQ_T, \
146 CLASSNAME, class WXDLLIMPEXP_CORE )
147
148// delete all hash elements
149//
150// NB: the class declaration of the hash elements must be visible from the
151// place where you use this macro, otherwise the proper destructor may not
152// be called (a decent compiler should give a warning about it, but don't
153// count on it)!
154#define WX_CLEAR_HASH_SET(type, hashset) \
155 { \
156 type::iterator it, en; \
157 for( it = (hashset).begin(), en = (hashset).end(); it != en; ++it ) \
158 delete *it; \
159 (hashset).clear(); \
160 }
161
162#endif // _WX_HASHSET_H_
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