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Added mathsym+tcc and boost against all advice

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maartenkeijzer 2005-10-06 12:13:53 +00:00
commit 90702a435d
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eo/contrib/mathsym/gen/TreeBuilder.cpp Normal file
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/*
* Copyright (C) 2005 Maarten Keijzer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <utils/eoRNG.h>
#include "TreeBuilder.h"
Sym TreeBuilder::make_terminal() const {
if (rng.flip(vcprob)) {
return table.get_random_var();
}
return table.get_random_const();
}
Sym TreeBuilder::build_tree(unsigned max_depth, bool grow) const {
if (max_depth == 0 || grow && rng.random(2) == 0) {
return make_terminal();
}
// pick a random function, no matter what arity
functor_t func = table.get_random_function();
SymVec args(func.arity);
for (unsigned i = 0; i < args.size(); ++i) {
args[i] = build_tree(max_depth-1, grow);
}
return Sym(func.token, args);
}