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<title>EO: SymImpl.h Source File</title>
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<a class="el" href="dir_000007.html">contrib</a> / <a class="el" href="dir_000008.html">mathsym</a> / <a class="el" href="dir_000028.html">sym</a></div>
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<h1>SymImpl.h</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* </span>
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00002 <span class="comment"> * Copyright (C) 2005 Maarten Keijzer</span>
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00003 <span class="comment"> *</span>
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00004 <span class="comment"> * This program is free software; you can redistribute it and/or modify</span>
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00005 <span class="comment"> * it under the terms of version 2 of the GNU General Public License as </span>
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00006 <span class="comment"> * published by the Free Software Foundation. </span>
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00007 <span class="comment"> *</span>
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00008 <span class="comment"> * This program is distributed in the hope that it will be useful,</span>
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00009 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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00010 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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00011 <span class="comment"> * GNU General Public License for more details.</span>
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00012 <span class="comment"> *</span>
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00013 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
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00014 <span class="comment"> * along with this program; if not, write to the Free Software</span>
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00015 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
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00016 <span class="comment"> */</span>
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00017 <span class="preprocessor">#ifndef __SYM_IMPL_H__</span>
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00018 <span class="preprocessor"></span><span class="preprocessor">#define __SYM_IMPL_H__</span>
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00019 <span class="preprocessor"></span>
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00020 <span class="preprocessor">#include <vector></span>
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00021
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00022 <span class="preprocessor">#include "token.h"</span>
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00023
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00024 <span class="keyword">class </span>Sym;
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00025
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00026 <span class="preprocessor">#if __GNUC__ > 4 </span>
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00027 <span class="preprocessor"></span><span class="preprocessor">#include <ext/pool_allocator.h></span>
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00028 <span class="keyword">typedef</span> std::vector<Sym, __gnu_cxx::__pool_alloc<Sym> > std::vector<Sym>;
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00029 <span class="comment">//typedef std::vector<Sym> SymVec;</span>
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00030 <span class="preprocessor">#else</span>
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00031 <span class="preprocessor"></span><span class="keyword">typedef</span> std::vector<Sym> SymVec;
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00032 <span class="preprocessor">#endif</span>
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00033 <span class="preprocessor"></span>
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00034
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00035 <span class="keyword">namespace </span>detail {
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00036
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00037 <span class="keyword">class </span>SymArgsImpl;
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00038 <span class="keyword">class </span>SymArgs {
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00039
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00040 <span class="keyword">mutable</span> SymArgsImpl* pimpl; <span class="comment">// contains circular reference to vector<Sym></span>
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00041 <span class="keyword">mutable</span> <span class="keyword">const</span> std::vector<Sym>* args_ptr;
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00042
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00043 <span class="keyword">public</span>:
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00044
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00045 SymArgs();
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00046 SymArgs(<span class="keyword">const</span> std::vector<Sym>& v);
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00047 ~SymArgs();
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00048
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00049 SymArgs(<span class="keyword">const</span> SymArgs& args);
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00050 <span class="keyword">const</span> SymArgs& SymArgs::operator=(<span class="keyword">const</span> SymArgs& other);
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00051
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00052 size_t len() <span class="keyword">const</span>;
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00053 <span class="keyword">const</span> std::vector<Sym>& vec()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *args_ptr; }
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00054 <span class="keywordtype">void</span> fixate() <span class="keyword">const</span>;
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00055 };
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00056
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00057 <span class="keyword">class </span>SymKey
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00058 {
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00059 <span class="keyword">public</span>:
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00060 SymKey(token_t _token) : args(), token(_token), hash_code(calc_hash()) {}
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00061 SymKey(token_t _token, <span class="keyword">const</span> detail::SymArgs& _args) : args(_args), token(_token), hash_code(calc_hash()) {}
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00062
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00063 <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> SymKey& other) <span class="keyword">const</span>;
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00064
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00065 <span class="keyword">struct </span>Hash
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00066 {
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00067 <span class="keywordtype">int</span> operator()(<span class="keyword">const</span> SymKey& k)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> k.calc_hash(); };
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00068 };
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00069
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00070 <span class="keywordtype">unsigned</span> arity()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> args.len(); }
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00071 <span class="keyword">const</span> std::vector<Sym>& vec()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> args.vec(); }
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00072
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00073 <span class="comment">// fixates (i.e. claims memory) for the embedded vector of Syms</span>
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00074 <span class="keywordtype">void</span> fixate()<span class="keyword"> const </span>{ args.fixate(); }
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00075
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00076 <span class="keywordtype">int</span> get_hash_code()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> hash_code; }
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00077
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00078 detail::SymArgs args;
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00079 token_t token; <span class="comment">// identifies the function</span>
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00080
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00081 <span class="keyword">private</span>:
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00082 <span class="keywordtype">int</span> calc_hash() <span class="keyword">const</span>;
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00083 <span class="keywordtype">int</span> hash_code;
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00084 };
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00085
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00086 <span class="keyword">struct </span>SymValue
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00087 {
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00088 <span class="keyword">friend</span> <span class="keyword">class </span>Sym;
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00089
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00090 SymValue();
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00091 ~SymValue();
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00092
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00093 <span class="keywordtype">unsigned</span> getRefCount()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> refcount; }
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00094 <span class="keywordtype">unsigned</span> getSize()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> size; }
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00095 <span class="keywordtype">unsigned</span> getDepth()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> depth; }
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00096
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00097
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00098
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00099 <span class="comment">// for reference counting</span>
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00100 <span class="keywordtype">unsigned</span> refcount;
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00101
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00102 <span class="comment">// some simple stats</span>
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00103 <span class="keywordtype">unsigned</span> size;
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00104 <span class="keywordtype">unsigned</span> depth;
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00105 UniqueNodeStats* uniqueNodeStats;
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00106
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00107 };
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00108
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00109
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00110 } <span class="comment">// namespace detail</span>
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00111
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00112 <span class="preprocessor">#endif</span>
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00113 <span class="preprocessor"></span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Oct 19 05:06:42 2006 for EO by
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<a href="http://www.doxygen.org/index.html">
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.3.9.1 </small></address>
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