TermIndex-hash.hpp

//
//  Copyright © 2021-22 Sean Holden. All rights reserved.
//
 
#ifndef TERMINDEX_HPP
#define TERMINDEX_HPP
 
#include <iostream>
#include <vector>
#include <unordered_map>
 
#include "TermHash.hpp"
 
using std::unordered_map;
using std::vector;
using std::ostream;
using std::endl;
 
class TermIndex {
private:
    unordered_map<Term, Term*, term_hash> index;
    vector<Term*> term_pointers;
public:
    TermIndex() : index(), term_pointers() {}
    ~TermIndex();
    TermIndex(const TermIndex&) = delete;
    TermIndex(const TermIndex&&) = delete;
    TermIndex& operator=(const TermIndex&) = delete;
    TermIndex& operator=(const TermIndex&&) = delete;
 
    size_t get_size() const { return term_pointers.size(); }
    Term* add_variable_term(Variable*);
    Term* add_function_term(Function*, const vector<Term*>&);
    Term* replace_variable_in_term(Variable*, Variable*, Term*);
    Term* replace_variable_in_term_with_term(Term*, Variable*, Term*);
 
    friend ostream& operator<<(ostream&, const TermIndex&);
};
 
#endif