Gabriele Cosmo
109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
/*
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Copyright (c) 2003-2006, Troy Aaron Johnson
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Troy Aaron Johnson nor the names of any
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/** Iterates through nodes that have the same parent and allows changes.
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*/
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class sibling_iterator : public virtual iterator
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{
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friend class tree;
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private:
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explicit sibling_iterator(tree_node<N>* current) : iterator(current) { }
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public:
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sibling_iterator(void) { }
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sibling_iterator(const iterator& iter) : iterator(iter) { }
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sibling_iterator& operator ++ (void)
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{
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sib_inc(this->current);
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return *this;
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}
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sibling_iterator operator ++ (int)
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{
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sibling_iterator tmp(*this);
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sib_inc(this->current);
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return tmp;
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}
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sibling_iterator& operator -- (void)
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{
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sib_dec(this->current);
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return *this;
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}
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sibling_iterator operator -- (int)
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{
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sibling_iterator tmp(*this);
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sib_dec(this->current);
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return tmp;
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}
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sibling_iterator operator + (unsigned int n) const
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{
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sibling_iterator i(*this);
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while (n-- > 0)
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++i;
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return i;
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}
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sibling_iterator& operator += (unsigned int n)
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{
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while (n-- > 0)
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sib_inc(this->current);
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return *this;
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}
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sibling_iterator operator - (unsigned int n) const
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{
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sibling_iterator i(*this);
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while (n-- > 0)
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--i;
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return i;
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}
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sibling_iterator& operator -= (unsigned int n)
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{
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while (n-- > 0)
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sib_dec(this->current);
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return *this;
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}
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};
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