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<h1>TreeBuilder.h</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* </span>
00002 <span class="comment"> * Copyright (C) 2005 Maarten Keijzer</span>
00003 <span class="comment"> *</span>
00004 <span class="comment"> * This program is free software; you can redistribute it and/or modify</span>
00005 <span class="comment"> * it under the terms of version 2 of the GNU General Public License as </span>
00006 <span class="comment"> * published by the Free Software Foundation. </span>
00007 <span class="comment"> *</span>
00008 <span class="comment"> * This program is distributed in the hope that it will be useful,</span>
00009 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
00010 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
00011 <span class="comment"> * GNU General Public License for more details.</span>
00012 <span class="comment"> *</span>
00013 <span class="comment"> * You should have received a copy of the GNU General Public License</span>
00014 <span class="comment"> * along with this program; if not, write to the Free Software</span>
00015 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
00016 <span class="comment"> */</span>
00017
00018 <span class="preprocessor">#ifndef TREEBUILDER_H_</span>
00019 <span class="preprocessor"></span><span class="preprocessor">#define TREEBUILDER_H_</span>
00020 <span class="preprocessor"></span>
00021 <span class="preprocessor">#include "Sym.h"</span>
00022 <span class="preprocessor">#include "LanguageTable.h"</span>
00023
00024 <span class="keyword">class </span>TreeBuilder {
00025 <span class="keyword">const</span> LanguageTable&amp; table;
00026
00027 <span class="comment">// probability of selecting a var versus a const when the choice boils down to selecting a terminal</span>
00028 <span class="keywordtype">double</span> vcprob;
00029
00030 Sym make_terminal() <span class="keyword">const</span>;
00031 <span class="keyword">public</span>:
00032
00033 TreeBuilder(<span class="keyword">const</span> LanguageTable&amp; t) : table(t), vcprob(0.9) {};
00034 TreeBuilder(<span class="keyword">const</span> LanguageTable&amp; t, <span class="keywordtype">double</span> vc) : table(t), vcprob(vc) {};
00035
00036 <span class="keywordtype">void</span> set_var_vs_const_probability(<span class="keywordtype">double</span> p) { vcprob = p; }
00037
00038 Sym build_tree(<span class="keywordtype">unsigned</span> max_depth, <span class="keywordtype">bool</span> grow) <span class="keyword">const</span>;
00039
00040 <span class="keywordtype">void</span> build_tree(Sym&amp; tree, <span class="keywordtype">unsigned</span> max_depth, <span class="keywordtype">bool</span> grow)<span class="keyword"> const </span>{ tree = build_tree(max_depth, grow); }
00041
00042 };
00043
00044 <span class="preprocessor">#endif</span>
00045 <span class="preprocessor"></span>
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