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#pragma once
#include <memory>
#include <string>
class env {
public:
virtual ~env() = default;
virtual int get_offset(const std::string& name) const = 0;
virtual bool has_variable(const std::string& name) const = 0;
};
using env_ptr = std::shared_ptr<env>;
class env_var : public env {
private:
std::string name;
env_ptr parent;
public:
env_var(std::string n, env_ptr p)
: name(std::move(n)), parent(std::move(p)) {}
int get_offset(const std::string& name) const;
bool has_variable(const std::string& name) const;
};
class env_offset : public env {
private:
int offset;
env_ptr parent;
public:
env_offset(int o, env_ptr p)
: offset(o), parent(std::move(p)) {}
int get_offset(const std::string& name) const;
bool has_variable(const std::string& name) const;
};