#pragma once
#include <string>
#include <memory>
#include <vector>

namespace lily {
    class type_manager;
    class type_env;
    struct type;

    struct pattern {
        virtual ~pattern() = default;
        virtual type* check_modifying(type_manager& mgr, std::shared_ptr<type_env> env) = 0;
    };

    typedef std::unique_ptr<pattern> pattern_ptr;

    struct pattern_var : pattern {
        std::string name;

        pattern_var(std::string n) :
            name(std::move(n)) {}
        ~pattern_var() = default;
        type* check_modifying(type_manager& mgr, std::shared_ptr<type_env> env);
    };

    struct pattern_cons : pattern {
        std::string name;
        std::vector<std::string> vnames;

        pattern_cons(std::string n) :
            name(std::move(n)) {}
        ~pattern_cons() = default;
        type* check_modifying(type_manager& mgr, std::shared_ptr<type_env> env);
    };
}