98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/*
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* Copyright (C) 2005 Maarten Keijzer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "LanguageTable.h"
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#include "Sym.h"
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#include <utils/eoRNG.h>
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using namespace std;
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extern Sym default_const();
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class LanguageImpl {
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public :
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std::vector<Sym> vars;
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LanguageTable::erc_func erc;
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std::vector<functor_t> functions;
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std::vector< std::vector<token_t> > functions_per_arity;
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LanguageImpl() : erc(default_const) {}
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};
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LanguageTable::LanguageTable() {
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pimpl = new LanguageImpl;
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}
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LanguageTable::~LanguageTable() {
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delete pimpl;
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}
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LanguageTable::LanguageTable(const LanguageTable& that) {
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pimpl = new LanguageImpl(*that.pimpl);
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}
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LanguageTable& LanguageTable::operator=(const LanguageTable& that) {
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*pimpl = *that.pimpl;
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return *this;
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}
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void LanguageTable::add_function(token_t token, unsigned arity) {
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functor_t f = {token, arity};
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add_function( f );
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}
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void LanguageTable::add_function(functor_t f) {
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if (f.arity > 0) {
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pimpl->functions.push_back(f);
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} else {
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pimpl->vars.push_back(Sym(f.token));
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}
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if (pimpl->functions_per_arity.size() <= f.arity) pimpl->functions_per_arity.resize(f.arity+1);
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pimpl->functions_per_arity[f.arity].push_back(f.token);
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}
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void LanguageTable::set_erc( erc_func func) { pimpl->erc = func; }
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/* Getting info out */
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extern Sym SymConst(double val);
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Sym LanguageTable::get_random_var() const { return rng.choice(pimpl->vars); }
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Sym LanguageTable::get_random_const() const { return pimpl->erc(); }
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functor_t LanguageTable::get_random_function() const
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{
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return rng.choice(pimpl->functions);
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}
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token_t LanguageTable::get_random_function(token_t token, unsigned arity) const
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{
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if (pimpl->functions_per_arity.size() <= arity || pimpl->functions_per_arity[arity].empty()) {
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return token; // return original token if no functions of this arity are found
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}
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return rng.choice(pimpl->functions_per_arity[arity]);
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}
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