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#include "definition.hpp"
#include <cassert>
#include "error.hpp"
#include "ast.hpp"
#include "instruction.hpp"
#include "llvm_context.hpp"
#include "type.hpp"
#include "type_env.hpp"
#include "graph.hpp"
#include <llvm/IR/DerivedTypes.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/Type.h>
void definition_defn::find_free() {
body->find_free(free_variables);
for(auto& param : params) {
free_variables.erase(param);
}
}
void definition_defn::insert_types(type_mgr& mgr, type_env_ptr& env, visibility v) {
this->env = env;
var_env = type_scope(env);
return_type = mgr.new_type();
full_type = return_type;
for(auto it = params.rbegin(); it != params.rend(); it++) {
type_ptr param_type = mgr.new_type();
full_type = type_ptr(new type_arr(param_type, full_type));
var_env->bind(*it, param_type);
}
env->bind(name, full_type, v);
}
void definition_defn::typecheck(type_mgr& mgr) {
type_ptr body_type = body->typecheck(mgr, var_env);
mgr.unify(return_type, body_type);
}
global_function& definition_defn::into_global(global_scope& scope) {
std::vector<std::string> all_params;
for(auto& free : free_variables) {
if(env->is_global(free)) continue;
all_params.push_back(free);
}
all_params.insert(all_params.end(), params.begin(), params.end());
body->translate(scope);
return scope.add_function(name, std::move(all_params), std::move(body));
}
void definition_data::insert_types(type_env_ptr& env) {
this->env = env;
env->bind_type(name, type_ptr(new type_data(name, vars.size())));
}
void definition_data::insert_constructors() const {
type_ptr this_type_ptr = env->lookup_type(name);
type_data* this_type = static_cast<type_data*>(this_type_ptr.get());
int next_tag = 0;
std::set<std::string> var_set;
type_app* return_app = new type_app(std::move(this_type_ptr));
type_ptr return_type(return_app);
for(auto& var : vars) {
if(var_set.find(var) != var_set.end())
throw compiler_error(
"type variable " + var +
" used twice in data type definition.", loc);
var_set.insert(var);
return_app->arguments.push_back(type_ptr(new type_var(var)));
}
for(auto& constructor : constructors) {
constructor->tag = next_tag;
this_type->constructors[constructor->name] = { next_tag++ };
type_ptr full_type = return_type;
for(auto it = constructor->types.rbegin(); it != constructor->types.rend(); it++) {
type_ptr type = (*it)->to_type(var_set, env);
full_type = type_ptr(new type_arr(type, full_type));
}
type_scheme_ptr full_scheme(new type_scheme(std::move(full_type)));
full_scheme->forall.insert(full_scheme->forall.begin(), vars.begin(), vars.end());
env->bind(constructor->name, full_scheme, visibility::global);
}
}
void definition_data::into_globals(global_scope& scope) {
for(auto& constructor : constructors) {
global_constructor& c = scope.add_constructor(
constructor->name, constructor->tag, constructor->types.size());
env->set_mangled_name(constructor->name, c.name);
}
}
void definition_group::find_free(std::set<std::string>& into) {
for(auto& def_pair : defs_defn) {
def_pair.second->find_free();
for(auto& free_var : def_pair.second->free_variables) {
if(defs_defn.find(free_var) == defs_defn.end()) {
into.insert(free_var);
} else {
def_pair.second->nearby_variables.insert(free_var);
}
}
}
}
void definition_group::typecheck(type_mgr& mgr, type_env_ptr& env) {
this->env = type_scope(env);
for(auto& def_data : defs_data) {
def_data.second->insert_types(this->env);
}
for(auto& def_data : defs_data) {
def_data.second->insert_constructors();
}
function_graph dependency_graph;
for(auto& def_defn : defs_defn) {
def_defn.second->find_free();
dependency_graph.add_function(def_defn.second->name);
for(auto& dependency : def_defn.second->nearby_variables) {
assert(defs_defn.find(dependency) != defs_defn.end());
dependency_graph.add_edge(def_defn.second->name, dependency);
}
}
std::vector<group_ptr> groups = dependency_graph.compute_order();
for(auto it = groups.rbegin(); it != groups.rend(); it++) {
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, this->env, vis);
}
for(auto& def_defnn_name : group->members) {
auto& def_defn = defs_defn.find(def_defnn_name)->second;
def_defn->typecheck(mgr);
}
for(auto& def_defnn_name : group->members) {
this->env->generalize(def_defnn_name, *group, mgr);
}
}
}