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#pragma once
#include <map>
#include <string>
#include "type.hpp"
struct type_env;
using type_env_ptr = std::shared_ptr<type_env>;
struct type_env {
type_env_ptr parent;
std::map<std::string, type_scheme_ptr> names;
std::map<std::string, type_ptr> type_names;
type_env(type_env_ptr p) : parent(std::move(p)) {}
type_env() : type_env(nullptr) {}
type_scheme_ptr lookup(const std::string& name) const;
type_ptr lookup_type(const std::string& name) const;
void bind(const std::string& name, type_ptr t);
void bind(const std::string& name, type_scheme_ptr t);
void bind_type(const std::string& type_name, type_ptr t);
void generalize(const std::string& name, type_mgr& mgr);
};
type_env_ptr type_scope(type_env_ptr parent);