A Hugo incarnation of the blog. https://danilafe.com
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

172 lines
4.2 KiB

#pragma once
#include <memory>
#include <vector>
#include "type.hpp"
#include "env.hpp"
struct ast {
virtual ~ast() = default;
virtual void print(int indent, std::ostream& to) const = 0;
virtual type_ptr typecheck(type_mgr& mgr, const type_env& env) const = 0;
};
using ast_ptr = std::unique_ptr<ast>;
struct pattern {
virtual ~pattern() = default;
virtual void print(std::ostream& to) const = 0;
virtual void match(type_ptr t, type_mgr& mgr, type_env& env) const = 0;
};
using pattern_ptr = std::unique_ptr<pattern>;
struct branch {
pattern_ptr pat;
ast_ptr expr;
branch(pattern_ptr p, ast_ptr a)
: pat(std::move(p)), expr(std::move(a)) {}
};
using branch_ptr = std::unique_ptr<branch>;
struct constructor {
std::string name;
std::vector<std::string> types;
constructor(std::string n, std::vector<std::string> ts)
: name(std::move(n)), types(std::move(ts)) {}
};
using constructor_ptr = std::unique_ptr<constructor>;
struct definition {
virtual ~definition() = default;
virtual void typecheck_first(type_mgr& mgr, type_env& env) = 0;
virtual void typecheck_second(type_mgr& mgr, const type_env& env) const = 0;
};
using definition_ptr = std::unique_ptr<definition>;
enum binop {
PLUS,
MINUS,
TIMES,
DIVIDE
};
struct ast_int : public ast {
int value;
explicit ast_int(int v)
: value(v) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct ast_lid : public ast {
std::string id;
explicit ast_lid(std::string i)
: id(std::move(i)) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct ast_uid : public ast {
std::string id;
explicit ast_uid(std::string i)
: id(std::move(i)) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct ast_binop : public ast {
binop op;
ast_ptr left;
ast_ptr right;
ast_binop(binop o, ast_ptr l, ast_ptr r)
: op(o), left(std::move(l)), right(std::move(r)) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct ast_app : public ast {
ast_ptr left;
ast_ptr right;
ast_app(ast_ptr l, ast_ptr r)
: left(std::move(l)), right(std::move(r)) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct ast_case : public ast {
ast_ptr of;
std::vector<branch_ptr> branches;
ast_case(ast_ptr o, std::vector<branch_ptr> b)
: of(std::move(o)), branches(std::move(b)) {}
void print(int indent, std::ostream& to) const;
type_ptr typecheck(type_mgr& mgr, const type_env& env) const;
};
struct pattern_var : public pattern {
std::string var;
pattern_var(std::string v)
: var(std::move(v)) {}
void print(std::ostream &to) const;
void match(type_ptr t, type_mgr& mgr, type_env& env) const;
};
struct pattern_constr : public pattern {
std::string constr;
std::vector<std::string> params;
pattern_constr(std::string c, std::vector<std::string> p)
: constr(std::move(c)), params(std::move(p)) {}
void print(std::ostream &to) const;
void match(type_ptr t, type_mgr&, type_env& env) const;
};
struct definition_defn : public definition {
std::string name;
std::vector<std::string> params;
ast_ptr body;
type_ptr return_type;
std::vector<type_ptr> param_types;
definition_defn(std::string n, std::vector<std::string> p, ast_ptr b)
: name(std::move(n)), params(std::move(p)), body(std::move(b)) {
}
void typecheck_first(type_mgr& mgr, type_env& env);
void typecheck_second(type_mgr& mgr, const type_env& env) const;
};
struct definition_data : public definition {
std::string name;
std::vector<constructor_ptr> constructors;
definition_data(std::string n, std::vector<constructor_ptr> cs)
: name(std::move(n)), constructors(std::move(cs)) {}
void typecheck_first(type_mgr& mgr, type_env& env);
void typecheck_second(type_mgr& mgr, const type_env& env) const;
};