Changes in src/GenPoly/ScopedSet.h [e9b5043:b8b6c442]
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src/GenPoly/ScopedSet.h
re9b5043 rb8b6c442 21 21 22 22 namespace GenPoly { 23 24 /// A set where the items are placed into nested scopes; 25 /// inserted items are placed into the innermost scope, lookup looks from the innermost scope outward 26 template<typename Value> 27 class ScopedSet { 28 typedef std::set< Value > Scope; 29 typedef std::vector< Scope > ScopeList; 30 31 /// Scoped list of sets. 32 ScopeList scopes; 33 public: 34 typedef typename Scope::key_type key_type; 35 typedef typename Scope::value_type value_type; 36 typedef typename ScopeList::size_type size_type; 37 typedef typename ScopeList::difference_type difference_type; 38 typedef typename Scope::reference reference; 39 typedef typename Scope::const_reference const_reference; 40 typedef typename Scope::pointer pointer; 41 typedef typename Scope::const_pointer const_pointer; 42 43 // Both iterator types are complete bidirectional iterators, see below. 44 class iterator; 45 class const_iterator; 46 47 /// Starts a new scope 48 void beginScope() { 49 Scope scope; 50 scopes.push_back(scope); 51 } 52 53 /// Ends a scope; invalidates any iterators pointing to elements of that scope 54 void endScope() { 55 scopes.pop_back(); 56 } 57 58 /// Default constructor initializes with one scope 59 ScopedSet() { beginScope(); } 60 61 iterator begin() { return iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 62 const_iterator begin() const { return const_iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 63 const_iterator cbegin() const { return const_iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 64 iterator end() { return iterator(scopes, scopes[0].end(), 0); } 65 const_iterator end() const { return const_iterator(scopes, scopes[0].end(), 0); } 66 const_iterator cend() const { return const_iterator(scopes, scopes[0].end(), 0); } 67 68 /// Gets the index of the current scope (counted from 1) 69 size_type currentScope() const { return scopes.size(); } 70 71 /// Finds the given key in the outermost scope it occurs; returns end() for none such 72 iterator find( const Value &key ) { 73 for ( size_type i = scopes.size() - 1; ; --i ) { 74 typename Scope::iterator val = scopes[i].find( key ); 75 if ( val != scopes[i].end() ) return iterator( scopes, val, i ); 76 if ( i == 0 ) break; 77 } 78 return end(); 79 } 80 const_iterator find( const Value &key ) const { 81 return const_iterator( const_cast< ScopedSet< Value >* >(this)->find( key ) ); 82 } 83 84 /// Finds the given key in the outermost scope inside the given scope where it occurs 85 iterator findNext( const_iterator &it, const Value &key ) { 86 if ( it.i == 0 ) return end(); 23 /// A set where the items are placed into nested scopes; 24 /// inserted items are placed into the innermost scope, lookup looks from the innermost scope outward 25 template<typename Value> 26 class ScopedSet { 27 typedef std::set< Value > Scope; 28 typedef std::vector< Scope > ScopeList; 29 30 ScopeList scopes; ///< scoped list of sets 31 public: 32 typedef typename Scope::key_type key_type; 33 typedef typename Scope::value_type value_type; 34 typedef typename ScopeList::size_type size_type; 35 typedef typename ScopeList::difference_type difference_type; 36 typedef typename Scope::reference reference; 37 typedef typename Scope::const_reference const_reference; 38 typedef typename Scope::pointer pointer; 39 typedef typename Scope::const_pointer const_pointer; 40 41 class iterator : public std::iterator< std::bidirectional_iterator_tag, 42 value_type > { 43 friend class ScopedSet; 44 friend class const_iterator; 45 typedef typename std::set< Value >::iterator wrapped_iterator; 46 typedef typename std::vector< std::set< Value > > scope_list; 47 typedef typename scope_list::size_type size_type; 48 49 /// Checks if this iterator points to a valid item 50 bool is_valid() const { 51 return it != (*scopes)[i].end(); 52 } 53 54 /// Increments on invalid 55 iterator& next_valid() { 56 if ( ! is_valid() ) { ++(*this); } 57 return *this; 58 } 59 60 /// Decrements on invalid 61 iterator& prev_valid() { 62 if ( ! is_valid() ) { --(*this); } 63 return *this; 64 } 65 66 iterator(scope_list const &_scopes, const wrapped_iterator &_it, size_type _i) 67 : scopes(&_scopes), it(_it), i(_i) {} 68 public: 69 iterator(const iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 70 iterator& operator= (const iterator &that) { 71 scopes = that.scopes; i = that.i; it = that.it; 72 return *this; 73 } 74 75 reference operator* () { return *it; } 76 pointer operator-> () { return it.operator->(); } 77 78 iterator& operator++ () { 79 if ( it == (*scopes)[i].end() ) { 80 if ( i == 0 ) return *this; 81 --i; 82 it = (*scopes)[i].begin(); 83 } else { 84 ++it; 85 } 86 return next_valid(); 87 } 88 iterator operator++ (int) { iterator tmp = *this; ++(*this); return tmp; } 89 90 iterator& operator-- () { 91 // may fail if this is the begin iterator; allowed by STL spec 92 if ( it == (*scopes)[i].begin() ) { 93 ++i; 94 it = (*scopes)[i].end(); 95 } 96 --it; 97 return prev_valid(); 98 } 99 iterator operator-- (int) { iterator tmp = *this; --(*this); return tmp; } 100 101 bool operator== (const iterator &that) { 102 return scopes == that.scopes && i == that.i && it == that.it; 103 } 104 bool operator!= (const iterator &that) { return !( *this == that ); } 105 106 size_type get_level() const { return i; } 107 108 private: 109 scope_list const *scopes; 110 wrapped_iterator it; 111 size_type i; 112 }; 113 114 class const_iterator : public std::iterator< std::bidirectional_iterator_tag, 115 value_type > { 116 friend class ScopedSet; 117 typedef typename std::set< Value >::iterator wrapped_iterator; 118 typedef typename std::set< Value >::const_iterator wrapped_const_iterator; 119 typedef typename std::vector< std::set< Value > > scope_list; 120 typedef typename scope_list::size_type size_type; 121 122 /// Checks if this iterator points to a valid item 123 bool is_valid() const { 124 return it != (*scopes)[i].end(); 125 } 126 127 /// Increments on invalid 128 const_iterator& next_valid() { 129 if ( ! is_valid() ) { ++(*this); } 130 return *this; 131 } 132 133 /// Decrements on invalid 134 const_iterator& prev_valid() { 135 if ( ! is_valid() ) { --(*this); } 136 return *this; 137 } 138 139 const_iterator(scope_list const &_scopes, const wrapped_const_iterator &_it, size_type _i) 140 : scopes(&_scopes), it(_it), i(_i) {} 141 public: 142 const_iterator(const iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 143 const_iterator(const const_iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 144 const_iterator& operator= (const iterator &that) { 145 scopes = that.scopes; i = that.i; it = that.it; 146 return *this; 147 } 148 const_iterator& operator= (const const_iterator &that) { 149 scopes = that.scopes; i = that.i; it = that.it; 150 return *this; 151 } 152 153 const_reference operator* () { return *it; } 154 const_pointer operator-> () { return it.operator->(); } 155 156 const_iterator& operator++ () { 157 if ( it == (*scopes)[i].end() ) { 158 if ( i == 0 ) return *this; 159 --i; 160 it = (*scopes)[i].begin(); 161 } else { 162 ++it; 163 } 164 return next_valid(); 165 } 166 const_iterator operator++ (int) { const_iterator tmp = *this; ++(*this); return tmp; } 167 168 const_iterator& operator-- () { 169 // may fail if this is the begin iterator; allowed by STL spec 170 if ( it == (*scopes)[i].begin() ) { 171 ++i; 172 it = (*scopes)[i].end(); 173 } 174 --it; 175 return prev_valid(); 176 } 177 const_iterator operator-- (int) { const_iterator tmp = *this; --(*this); return tmp; } 178 179 bool operator== (const const_iterator &that) { 180 return scopes == that.scopes && i == that.i && it == that.it; 181 } 182 bool operator!= (const const_iterator &that) { return !( *this == that ); } 183 184 size_type get_level() const { return i; } 185 186 private: 187 scope_list const *scopes; 188 wrapped_const_iterator it; 189 size_type i; 190 }; 191 192 /// Starts a new scope 193 void beginScope() { 194 Scope scope; 195 scopes.push_back(scope); 196 } 197 198 /// Ends a scope; invalidates any iterators pointing to elements of that scope 199 void endScope() { 200 scopes.pop_back(); 201 } 202 203 /// Default constructor initializes with one scope 204 ScopedSet() { beginScope(); } 205 206 iterator begin() { return iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 207 const_iterator begin() const { return const_iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 208 const_iterator cbegin() const { return const_iterator(scopes, scopes.back().begin(), scopes.size()-1).next_valid(); } 209 iterator end() { return iterator(scopes, scopes[0].end(), 0); } 210 const_iterator end() const { return const_iterator(scopes, scopes[0].end(), 0); } 211 const_iterator cend() const { return const_iterator(scopes, scopes[0].end(), 0); } 212 213 /// Gets the index of the current scope (counted from 1) 214 size_type currentScope() const { return scopes.size(); } 215 216 /// Finds the given key in the outermost scope it occurs; returns end() for none such 217 iterator find( const Value &key ) { 218 for ( size_type i = scopes.size() - 1; ; --i ) { 219 typename Scope::iterator val = scopes[i].find( key ); 220 if ( val != scopes[i].end() ) return iterator( scopes, val, i ); 221 if ( i == 0 ) break; 222 } 223 return end(); 224 } 225 const_iterator find( const Value &key ) const { 226 return const_iterator( const_cast< ScopedSet< Value >* >(this)->find( key ) ); 227 } 228 229 /// Finds the given key in the outermost scope inside the given scope where it occurs 230 iterator findNext( const_iterator &it, const Value &key ) { 231 if ( it.i == 0 ) return end(); 87 232 for ( size_type i = it.i - 1; ; --i ) { 88 typename Scope::iterator val = scopes[i].find( key ); 89 if ( val != scopes[i].end() ) return iterator( scopes, val, i ); 90 if ( i == 0 ) break; 91 } 92 return end(); 93 } 94 const_iterator findNext( const_iterator &it, const Value &key ) const { 95 return const_iterator( const_cast< ScopedSet< Value >* >(this)->findNext( it, key ) ); 96 } 97 98 /// Inserts the given value into the outermost scope 99 std::pair< iterator, bool > insert( const value_type &value ) { 100 std::pair< typename Scope::iterator, bool > res = scopes.back().insert( value ); 101 return std::make_pair( iterator(scopes, res.first, scopes.size()-1), res.second ); 102 } 103 104 bool contains( const Value & key ) const { 105 return find( key ) != cend(); 106 } 107 }; 108 109 template<typename Value> 110 class ScopedSet<Value>::iterator : 111 public std::iterator< std::bidirectional_iterator_tag, value_type > { 112 friend class ScopedSet; 113 friend class const_iterator; 114 typedef typename std::set< Value >::iterator wrapped_iterator; 115 typedef typename std::vector< std::set< Value > > scope_list; 116 typedef typename scope_list::size_type size_type; 117 118 /// Checks if this iterator points to a valid item 119 bool is_valid() const { 120 return it != (*scopes)[i].end(); 121 } 122 123 /// Increments on invalid 124 iterator& next_valid() { 125 if ( ! is_valid() ) { ++(*this); } 126 return *this; 127 } 128 129 /// Decrements on invalid 130 iterator& prev_valid() { 131 if ( ! is_valid() ) { --(*this); } 132 return *this; 133 } 134 135 iterator(scope_list const &_scopes, const wrapped_iterator &_it, size_type _i) 136 : scopes(&_scopes), it(_it), i(_i) {} 137 public: 138 iterator(const iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 139 iterator& operator= (const iterator &that) { 140 scopes = that.scopes; i = that.i; it = that.it; 141 return *this; 142 } 143 144 reference operator* () { return *it; } 145 pointer operator-> () { return it.operator->(); } 146 147 iterator& operator++ () { 148 if ( it == (*scopes)[i].end() ) { 149 if ( i == 0 ) return *this; 150 --i; 151 it = (*scopes)[i].begin(); 152 } else { 153 ++it; 154 } 155 return next_valid(); 156 } 157 iterator operator++ (int) { iterator tmp = *this; ++(*this); return tmp; } 158 159 iterator& operator-- () { 160 // may fail if this is the begin iterator; allowed by STL spec 161 if ( it == (*scopes)[i].begin() ) { 162 ++i; 163 it = (*scopes)[i].end(); 164 } 165 --it; 166 return prev_valid(); 167 } 168 iterator operator-- (int) { iterator tmp = *this; --(*this); return tmp; } 169 170 bool operator== (const iterator &that) { 171 return scopes == that.scopes && i == that.i && it == that.it; 172 } 173 bool operator!= (const iterator &that) { return !( *this == that ); } 174 175 size_type get_level() const { return i; } 176 177 private: 178 scope_list const *scopes; 179 wrapped_iterator it; 180 size_type i; 181 }; 182 183 template<typename Value> 184 class ScopedSet<Value>::const_iterator : 185 public std::iterator< std::bidirectional_iterator_tag, value_type > { 186 friend class ScopedSet; 187 typedef typename std::set< Value >::iterator wrapped_iterator; 188 typedef typename std::set< Value >::const_iterator wrapped_const_iterator; 189 typedef typename std::vector< std::set< Value > > scope_list; 190 typedef typename scope_list::size_type size_type; 191 192 /// Checks if this iterator points to a valid item 193 bool is_valid() const { 194 return it != (*scopes)[i].end(); 195 } 196 197 /// Increments on invalid 198 const_iterator& next_valid() { 199 if ( ! is_valid() ) { ++(*this); } 200 return *this; 201 } 202 203 /// Decrements on invalid 204 const_iterator& prev_valid() { 205 if ( ! is_valid() ) { --(*this); } 206 return *this; 207 } 208 209 const_iterator(scope_list const &_scopes, const wrapped_const_iterator &_it, size_type _i) 210 : scopes(&_scopes), it(_it), i(_i) {} 211 public: 212 const_iterator(const iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 213 const_iterator(const const_iterator &that) : scopes(that.scopes), it(that.it), i(that.i) {} 214 const_iterator& operator= (const iterator &that) { 215 scopes = that.scopes; i = that.i; it = that.it; 216 return *this; 217 } 218 const_iterator& operator= (const const_iterator &that) { 219 scopes = that.scopes; i = that.i; it = that.it; 220 return *this; 221 } 222 223 const_reference operator* () { return *it; } 224 const_pointer operator-> () { return it.operator->(); } 225 226 const_iterator& operator++ () { 227 if ( it == (*scopes)[i].end() ) { 228 if ( i == 0 ) return *this; 229 --i; 230 it = (*scopes)[i].begin(); 231 } else { 232 ++it; 233 } 234 return next_valid(); 235 } 236 const_iterator operator++ (int) { const_iterator tmp = *this; ++(*this); return tmp; } 237 238 const_iterator& operator-- () { 239 // may fail if this is the begin iterator; allowed by STL spec 240 if ( it == (*scopes)[i].begin() ) { 241 ++i; 242 it = (*scopes)[i].end(); 243 } 244 --it; 245 return prev_valid(); 246 } 247 const_iterator operator-- (int) { const_iterator tmp = *this; --(*this); return tmp; } 248 249 bool operator== (const const_iterator &that) { 250 return scopes == that.scopes && i == that.i && it == that.it; 251 } 252 bool operator!= (const const_iterator &that) { return !( *this == that ); } 253 254 size_type get_level() const { return i; } 255 256 private: 257 scope_list const *scopes; 258 wrapped_const_iterator it; 259 size_type i; 260 }; 261 233 typename Scope::iterator val = scopes[i].find( key ); 234 if ( val != scopes[i].end() ) return iterator( scopes, val, i ); 235 if ( i == 0 ) break; 236 } 237 return end(); 238 } 239 const_iterator findNext( const_iterator &it, const Value &key ) const { 240 return const_iterator( const_cast< ScopedSet< Value >* >(this)->findNext( it, key ) ); 241 } 242 243 /// Inserts the given value into the outermost scope 244 std::pair< iterator, bool > insert( const value_type &value ) { 245 std::pair< typename Scope::iterator, bool > res = scopes.back().insert( value ); 246 return std::make_pair( iterator(scopes, res.first, scopes.size()-1), res.second ); 247 } 248 249 }; 262 250 } // namespace GenPoly 263 251
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