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/*
* richard-atp-engine: A saturation-based automated theorem prover for first-order logic.
* Copyright (C) 2026 Richard Qin
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <https://www.gnu.org/licenses/>.
*/
#include "atp/core/term_bank.h"
#include "atp/core/term.h"
#include "atp/core/types.h"
#include <cassert>
#include <cstddef>
#include <span>
#include <utility>
#include <vector>
namespace atp {
TermId TermBank::makeTerm(SymbolId symbol, std::span<const TermId> args) {
TermKey key{.symbol_ = symbol, .args_ = {args.begin(), args.end()}};
auto it = term_to_id_.find(key);
if (it != term_to_id_.end()) {
return it->second;
}
auto new_id = static_cast<TermId>(terms_.size());
Term new_term{.symbol_id_ = symbol, .args_ = key.args_};
terms_.push_back(std::move(new_term));
term_to_id_.emplace(std::move(key), new_id);
return new_id;
}
TermId TermBank::makeVar(SymbolId var_symbol) {
return makeTerm(var_symbol, {});
}
const Term& TermBank::getTerm(TermId id) const {
assert(id < terms_.size() && "TermId out of bounds!");
return terms_[id];
}
bool TermBank::isVariable(TermId id) const {
assert(id < terms_.size() && "TermId out of bounds!");
return symbols_->isVariable(terms_[id].symbol_id_);
}
size_t TermBank::size() const {
return terms_.size();
}
} // namespace atp
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