PorygonLang/src/Evaluator/EvalValues/StringEvalValue.hpp

#ifndef PORYGONLANG_STRINGEVALVALUE_HPP
#define PORYGONLANG_STRINGEVALVALUE_HPP

#include <string>
#include "EvalValue.hpp"
#include "../../Utilities/HashedString.hpp"

using namespace std;

class StringEvalValue : public EvalValue{
    string _value;
    size_t _hash;
public:
    explicit StringEvalValue(string s){
        _value = move(s);
        _hash = HashedString::ConstHash (_value.c_str());
    }

    const TypeClass GetTypeClass() final{
        return TypeClass ::String;
    }

    bool operator ==(EvalValue* b) final{
        if (b->GetTypeClass() != TypeClass::String)
            return false;
        return this->_hash == b->GetHashCode();
    };

    string* EvaluateString() final{
        return &_value;
    }

    shared_ptr<EvalValue> Clone() final{
        return make_shared<StringEvalValue>(_value);
    }

    shared_ptr<EvalValue> IndexValue(EvalValue* val) final{
        // Porygon is 1-indexed, so we convert to that.
        auto l = val->EvaluateInteger() - 1;
        return make_shared<StringEvalValue>(string(1, _value[l]));
    }

    std::size_t GetHashCode() final{
        return _hash;
    }
};


#endif //PORYGONLANG_STRINGEVALVALUE_HPP