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Mark some definitions as global, so as not to capture them.

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This commit is contained in:
Danila Fedorin 2020-05-31 00:34:12 -07:00
parent dec6d834f5
commit de08f0febf
6 changed files with 41 additions and 24 deletions
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6
12/definition.cpp
View File

@ -26,8 +26,8 @@ void definition_defn::find_free(type_mgr& mgr, type_env_ptr& env) {
body->find_free(mgr, var_env, free_variables);
}
void definition_defn::insert_types(type_mgr& mgr) {
env->bind(name, full_type);
void definition_defn::insert_types(type_mgr& mgr, visibility v) {
env->bind(name, full_type, v);
}
void definition_defn::typecheck(type_mgr& mgr) {
@ -150,7 +150,7 @@ void definition_group::typecheck(type_mgr& mgr) {
auto& group = *it;
for(auto& def_defnn_name : group->members) {
auto& def_defn = defs_defn.find(def_defnn_name)->second;
def_defn->insert_types(mgr);
def_defn->insert_types(mgr, vis);
}
for(auto& def_defnn_name : group->members) {
auto& def_defn = defs_defn.find(def_defnn_name)->second;

6
12/definition.hpp
View File

@ -44,7 +44,7 @@ struct definition_defn {
}
void find_free(type_mgr& mgr, type_env_ptr& env);
void insert_types(type_mgr& mgr);
void insert_types(type_mgr& mgr, visibility v);
void typecheck(type_mgr& mgr);
void compile();
void declare_llvm(llvm_context& ctx);
@ -76,9 +76,11 @@ using definition_data_ptr = std::unique_ptr<definition_data>;
struct definition_group {
std::map<std::string, definition_data_ptr> defs_data;
std::map<std::string, definition_defn_ptr> defs_defn;
visibility vis;
type_env_ptr env;
definition_group(visibility v = visibility::local) : vis(v) {}
void find_free(type_mgr& mgr, type_env_ptr& env, std::set<std::string>& into);
void typecheck(type_mgr& mgr);
};

10
12/main.cpp
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@ -33,10 +33,10 @@ void typecheck_program(
type_ptr binop_type = type_ptr(new type_arr(
int_type_app,
type_ptr(new type_arr(int_type_app, int_type_app))));
env->bind("+", binop_type);
env->bind("-", binop_type);
env->bind("*", binop_type);
env->bind("/", binop_type);
env->bind("+", binop_type, visibility::global);
env->bind("-", binop_type, visibility::global);
env->bind("*", binop_type, visibility::global);
env->bind("/", binop_type, visibility::global);
std::set<std::string> free;
defs.find_free(mgr, env, free);
@ -44,7 +44,7 @@ void typecheck_program(
for(auto& pair : defs.env->names) {
std::cout << pair.first << ": ";
pair.second->print(mgr, std::cout);
pair.second.type->print(mgr, std::cout);
std::cout << std::endl;
}
}

2
12/parser.y
View File

@ -7,7 +7,7 @@
#include "parser.hpp"
#include "parsed_type.hpp"
definition_group global_defs;
definition_group global_defs(visibility::global);
extern yy::parser::symbol_type yylex();

21
12/type_env.cpp
View File

@ -4,7 +4,7 @@
void type_env::find_free(const type_mgr& mgr, std::set<std::string>& into) const {
if(parent != nullptr) parent->find_free(mgr, into);
for(auto& binding : names) {
mgr.find_free(binding.second, into);
mgr.find_free(binding.second.type, into);
}
}
@ -13,13 +13,13 @@ void type_env::find_free_except(const type_mgr& mgr, const std::string& avoid,
if(parent != nullptr) parent->find_free(mgr, into);
for(auto& binding : names) {
if(binding.first == avoid) continue;
mgr.find_free(binding.second, into);
mgr.find_free(binding.second.type, into);
}
}
type_scheme_ptr type_env::lookup(const std::string& name) const {
auto it = names.find(name);
if(it != names.end()) return it->second;
if(it != names.end()) return it->second.type;
if(parent) return parent->lookup(name);
return nullptr;
}
@ -31,12 +31,13 @@ type_ptr type_env::lookup_type(const std::string& name) const {
return nullptr;
}
void type_env::bind(const std::string& name, type_ptr t) {
names[name] = type_scheme_ptr(new type_scheme(t));
void type_env::bind(const std::string& name, type_ptr t, visibility v) {
type_scheme_ptr new_scheme(new type_scheme(std::move(t)));
names[name] = variable_data(std::move(new_scheme), v);
}
void type_env::bind(const std::string& name, type_scheme_ptr t) {
names[name] = t;
void type_env::bind(const std::string& name, type_scheme_ptr t, visibility v) {
names[name] = variable_data(std::move(t), v);
}
void type_env::bind_type(const std::string& type_name, type_ptr t) {
@ -47,15 +48,15 @@ void type_env::bind_type(const std::string& type_name, type_ptr t) {
void type_env::generalize(const std::string& name, type_mgr& mgr) {
auto names_it = names.find(name);
if(names_it == names.end()) throw 0;
if(names_it->second->forall.size() > 0) throw 0;
if(names_it->second.type->forall.size() > 0) throw 0;
std::set<std::string> free_in_type;
std::set<std::string> free_in_env;
mgr.find_free(names_it->second->monotype, free_in_type);
mgr.find_free(names_it->second.type->monotype, free_in_type);
find_free_except(mgr, name, free_in_env);
for(auto& free : free_in_type) {
if(free_in_env.find(free) != free_in_env.end()) continue;
names_it->second->forall.push_back(free);
names_it->second.type->forall.push_back(free);
}
}

20
12/type_env.hpp
View File

@ -7,9 +7,21 @@
struct type_env;
using type_env_ptr = std::shared_ptr<type_env>;
enum class visibility { global,local };
struct type_env {
struct variable_data {
type_scheme_ptr type;
visibility vis;
variable_data()
: variable_data(nullptr, visibility::local) {}
variable_data(type_scheme_ptr t, visibility v)
: type(std::move(t)), vis(v) {}
};
type_env_ptr parent;
std::map<std::string, type_scheme_ptr> names;
std::map<std::string, variable_data> names;
std::map<std::string, type_ptr> type_names;
type_env(type_env_ptr p) : parent(std::move(p)) {}
@ -20,8 +32,10 @@ struct type_env {
std::set<std::string>& into) const;
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(const std::string& name, type_ptr t,
visibility v = visibility::local);
void bind(const std::string& name, type_scheme_ptr t,
visibility v = visibility::local);
void bind_type(const std::string& type_name, type_ptr t);
void generalize(const std::string& name, type_mgr& mgr);
};