2018-11-27 18:42:26 -06:00
|
|
|
//! Name resolution algorithm. The end result of the algorithm is `ItemMap`: a
|
|
|
|
//! map with maps each module to it's scope: the set of items, visible in the
|
|
|
|
//! module. That is, we only resolve imports here, name resolution of item
|
|
|
|
//! bodies will be done in a separate step.
|
|
|
|
//!
|
|
|
|
//! Like Rustc, we use an interative per-crate algorithm: we start with scopes
|
|
|
|
//! containing only directly defined items, and then iteratively resolve
|
|
|
|
//! imports.
|
|
|
|
//!
|
|
|
|
//! To make this work nicely in the IDE scenarios, we place `InputModuleItems`
|
|
|
|
//! in between raw syntax and name resolution. `InputModuleItems` are computed
|
|
|
|
//! using only the module's syntax, and it is all directly defined items plus
|
|
|
|
//! imports. The plain is to make `InputModuleItems` independent of local
|
|
|
|
//! modifications (that is, typing inside a function shold not change IMIs),
|
|
|
|
//! such that the results of name resolution can be preserved unless the module
|
|
|
|
//! structure itself is modified.
|
2018-12-27 11:07:21 -06:00
|
|
|
use std::sync::Arc;
|
2018-11-27 18:42:26 -06:00
|
|
|
|
|
|
|
use rustc_hash::FxHashMap;
|
|
|
|
use ra_syntax::{
|
|
|
|
TextRange,
|
2018-12-27 11:07:21 -06:00
|
|
|
SyntaxKind::{self, *},
|
2018-11-27 18:42:26 -06:00
|
|
|
ast::{self, AstNode}
|
|
|
|
};
|
2019-01-01 15:30:00 -06:00
|
|
|
use ra_db::{SourceRootId, Cancelable, FileId};
|
2018-11-27 18:42:26 -06:00
|
|
|
|
|
|
|
use crate::{
|
2019-01-01 15:30:00 -06:00
|
|
|
HirFileId,
|
2018-12-04 14:01:53 -06:00
|
|
|
DefId, DefLoc, DefKind,
|
2018-11-27 18:42:26 -06:00
|
|
|
SourceItemId, SourceFileItemId, SourceFileItems,
|
|
|
|
Path, PathKind,
|
2018-12-09 03:45:47 -06:00
|
|
|
HirDatabase, Crate,
|
2018-12-27 11:07:21 -06:00
|
|
|
Name, AsName,
|
2018-12-19 15:57:13 -06:00
|
|
|
module::{Module, ModuleId, ModuleTree},
|
2018-11-27 18:42:26 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/// Item map is the result of the name resolution. Item map contains, for each
|
|
|
|
/// module, the set of visible items.
|
2018-12-19 16:00:54 -06:00
|
|
|
// FIXME: currenty we compute item map per source-root. We should do it per crate instead.
|
2018-11-27 18:42:26 -06:00
|
|
|
#[derive(Default, Debug, PartialEq, Eq)]
|
2018-11-27 19:09:44 -06:00
|
|
|
pub struct ItemMap {
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|
|
|
pub per_module: FxHashMap<ModuleId, ModuleScope>,
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, Default, PartialEq, Eq, Clone)]
|
2018-11-27 19:09:44 -06:00
|
|
|
pub struct ModuleScope {
|
2018-12-27 11:07:21 -06:00
|
|
|
items: FxHashMap<Name, Resolution>,
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
impl ModuleScope {
|
2018-12-27 11:07:21 -06:00
|
|
|
pub fn entries<'a>(&'a self) -> impl Iterator<Item = (&'a Name, &'a Resolution)> + 'a {
|
2018-11-27 18:42:26 -06:00
|
|
|
self.items.iter()
|
|
|
|
}
|
2018-12-27 11:07:21 -06:00
|
|
|
pub fn get(&self, name: &Name) -> Option<&Resolution> {
|
2018-11-27 18:42:26 -06:00
|
|
|
self.items.get(name)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// A set of items and imports declared inside a module, without relation to
|
|
|
|
/// other modules.
|
|
|
|
///
|
|
|
|
/// This stands in-between raw syntax and name resolution and alow us to avoid
|
|
|
|
/// recomputing name res: if `InputModuleItems` are the same, we can avoid
|
|
|
|
/// running name resolution.
|
|
|
|
#[derive(Debug, Default, PartialEq, Eq)]
|
2018-11-27 19:09:44 -06:00
|
|
|
pub struct InputModuleItems {
|
2019-01-03 12:28:35 -06:00
|
|
|
pub(crate) items: Vec<ModuleItem>,
|
2018-11-27 18:42:26 -06:00
|
|
|
imports: Vec<Import>,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, PartialEq, Eq)]
|
2019-01-03 12:28:35 -06:00
|
|
|
pub(crate) struct ModuleItem {
|
|
|
|
pub(crate) id: SourceItemId,
|
|
|
|
pub(crate) name: Name,
|
2018-11-27 18:42:26 -06:00
|
|
|
kind: SyntaxKind,
|
|
|
|
vis: Vis,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, PartialEq, Eq)]
|
|
|
|
enum Vis {
|
|
|
|
// Priv,
|
|
|
|
Other,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
|
|
struct Import {
|
|
|
|
path: Path,
|
|
|
|
kind: ImportKind,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
2018-11-27 19:09:44 -06:00
|
|
|
pub struct NamedImport {
|
|
|
|
pub file_item_id: SourceFileItemId,
|
|
|
|
pub relative_range: TextRange,
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
impl NamedImport {
|
2019-01-01 14:21:16 -06:00
|
|
|
// FIXME: this is only here for one use-case in completion. Seems like a
|
|
|
|
// pretty gross special case.
|
2018-11-27 19:09:44 -06:00
|
|
|
pub fn range(&self, db: &impl HirDatabase, file_id: FileId) -> TextRange {
|
2018-11-27 18:42:26 -06:00
|
|
|
let source_item_id = SourceItemId {
|
2019-01-01 14:21:16 -06:00
|
|
|
file_id: file_id.into(),
|
2018-12-18 16:48:46 -06:00
|
|
|
item_id: Some(self.file_item_id),
|
2018-11-27 18:42:26 -06:00
|
|
|
};
|
|
|
|
let syntax = db.file_item(source_item_id);
|
|
|
|
let offset = syntax.borrowed().range().start();
|
|
|
|
self.relative_range + offset
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
|
|
|
enum ImportKind {
|
|
|
|
Glob,
|
|
|
|
Named(NamedImport),
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Resolution is basically `DefId` atm, but it should account for stuff like
|
|
|
|
/// multiple namespaces, ambiguity and errors.
|
|
|
|
#[derive(Debug, Clone, PartialEq, Eq)]
|
2018-11-27 19:09:44 -06:00
|
|
|
pub struct Resolution {
|
2018-11-27 18:42:26 -06:00
|
|
|
/// None for unresolved
|
2018-12-24 13:32:39 -06:00
|
|
|
pub def_id: PerNs<DefId>,
|
2018-11-27 18:42:26 -06:00
|
|
|
/// ident by whitch this is imported into local scope.
|
2018-11-27 19:09:44 -06:00
|
|
|
pub import: Option<NamedImport>,
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
2018-12-24 13:32:39 -06:00
|
|
|
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
|
|
|
|
pub enum Namespace {
|
|
|
|
Types,
|
|
|
|
Values,
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
|
|
|
|
pub struct PerNs<T> {
|
|
|
|
pub types: Option<T>,
|
|
|
|
pub values: Option<T>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<T> PerNs<T> {
|
|
|
|
pub fn none() -> PerNs<T> {
|
|
|
|
PerNs {
|
|
|
|
types: None,
|
|
|
|
values: None,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn values(t: T) -> PerNs<T> {
|
|
|
|
PerNs {
|
|
|
|
types: None,
|
|
|
|
values: Some(t),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn types(t: T) -> PerNs<T> {
|
|
|
|
PerNs {
|
|
|
|
types: Some(t),
|
|
|
|
values: None,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn both(types: T, values: T) -> PerNs<T> {
|
|
|
|
PerNs {
|
|
|
|
types: Some(types),
|
|
|
|
values: Some(values),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn is_none(&self) -> bool {
|
|
|
|
self.types.is_none() && self.values.is_none()
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn take(self, namespace: Namespace) -> Option<T> {
|
|
|
|
match namespace {
|
|
|
|
Namespace::Types => self.types,
|
|
|
|
Namespace::Values => self.values,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn take_types(self) -> Option<T> {
|
|
|
|
self.types
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn take_values(self) -> Option<T> {
|
|
|
|
self.values
|
|
|
|
}
|
2018-11-27 18:42:26 -06:00
|
|
|
|
2018-12-24 13:32:39 -06:00
|
|
|
pub fn get(&self, namespace: Namespace) -> Option<&T> {
|
|
|
|
self.as_ref().take(namespace)
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn as_ref(&self) -> PerNs<&T> {
|
|
|
|
PerNs {
|
|
|
|
types: self.types.as_ref(),
|
|
|
|
values: self.values.as_ref(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn and_then<U>(self, f: impl Fn(T) -> Option<U>) -> PerNs<U> {
|
|
|
|
PerNs {
|
|
|
|
types: self.types.and_then(&f),
|
|
|
|
values: self.values.and_then(&f),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn map<U>(self, f: impl Fn(T) -> U) -> PerNs<U> {
|
|
|
|
PerNs {
|
|
|
|
types: self.types.map(&f),
|
|
|
|
values: self.values.map(&f),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2018-11-27 18:42:26 -06:00
|
|
|
|
|
|
|
impl InputModuleItems {
|
2019-01-01 12:17:52 -06:00
|
|
|
pub(crate) fn add_item(
|
|
|
|
&mut self,
|
2019-01-01 14:21:16 -06:00
|
|
|
file_id: HirFileId,
|
2018-11-27 18:42:26 -06:00
|
|
|
file_items: &SourceFileItems,
|
2019-01-01 12:17:52 -06:00
|
|
|
item: ast::ModuleItem,
|
|
|
|
) -> Option<()> {
|
2018-11-27 18:42:26 -06:00
|
|
|
match item {
|
2019-01-01 12:17:52 -06:00
|
|
|
ast::ModuleItem::StructDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::EnumDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::FnDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::TraitDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::TypeDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
2018-12-26 14:24:49 -06:00
|
|
|
ast::ModuleItem::ImplBlock(_) => {
|
2018-11-27 18:42:26 -06:00
|
|
|
// impls don't define items
|
|
|
|
}
|
|
|
|
ast::ModuleItem::UseItem(it) => self.add_use_item(file_items, it),
|
|
|
|
ast::ModuleItem::ExternCrateItem(_) => {
|
|
|
|
// TODO
|
|
|
|
}
|
2019-01-01 12:17:52 -06:00
|
|
|
ast::ModuleItem::ConstDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::StaticDef(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
|
|
|
ast::ModuleItem::Module(it) => {
|
2019-01-01 14:21:16 -06:00
|
|
|
self.items.push(ModuleItem::new(file_id, file_items, it)?)
|
2019-01-01 12:17:52 -06:00
|
|
|
}
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
Some(())
|
|
|
|
}
|
|
|
|
|
|
|
|
fn add_use_item(&mut self, file_items: &SourceFileItems, item: ast::UseItem) {
|
2018-12-09 04:18:46 -06:00
|
|
|
let file_item_id = file_items.id_of_unchecked(item.syntax());
|
2018-11-27 18:42:26 -06:00
|
|
|
let start_offset = item.syntax().range().start();
|
|
|
|
Path::expand_use_item(item, |path, range| {
|
|
|
|
let kind = match range {
|
|
|
|
None => ImportKind::Glob,
|
|
|
|
Some(range) => ImportKind::Named(NamedImport {
|
|
|
|
file_item_id,
|
|
|
|
relative_range: range - start_offset,
|
|
|
|
}),
|
|
|
|
};
|
|
|
|
self.imports.push(Import { kind, path })
|
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl ModuleItem {
|
2019-01-01 12:17:52 -06:00
|
|
|
fn new<'a>(
|
2019-01-01 14:21:16 -06:00
|
|
|
file_id: HirFileId,
|
2019-01-01 12:17:52 -06:00
|
|
|
file_items: &SourceFileItems,
|
|
|
|
item: impl ast::NameOwner<'a>,
|
|
|
|
) -> Option<ModuleItem> {
|
2018-12-27 11:07:21 -06:00
|
|
|
let name = item.name()?.as_name();
|
2018-11-27 18:42:26 -06:00
|
|
|
let kind = item.syntax().kind();
|
|
|
|
let vis = Vis::Other;
|
2019-01-01 12:17:52 -06:00
|
|
|
let item_id = Some(file_items.id_of_unchecked(item.syntax()));
|
2019-01-01 14:21:16 -06:00
|
|
|
let id = SourceItemId { file_id, item_id };
|
2018-11-27 18:42:26 -06:00
|
|
|
let res = ModuleItem {
|
|
|
|
id,
|
|
|
|
name,
|
|
|
|
kind,
|
|
|
|
vis,
|
|
|
|
};
|
|
|
|
Some(res)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub(crate) struct Resolver<'a, DB> {
|
2018-12-09 03:24:52 -06:00
|
|
|
db: &'a DB,
|
|
|
|
input: &'a FxHashMap<ModuleId, Arc<InputModuleItems>>,
|
|
|
|
source_root: SourceRootId,
|
|
|
|
module_tree: Arc<ModuleTree>,
|
|
|
|
result: ItemMap,
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
impl<'a, DB> Resolver<'a, DB>
|
|
|
|
where
|
|
|
|
DB: HirDatabase,
|
|
|
|
{
|
2018-12-09 03:24:52 -06:00
|
|
|
pub(crate) fn new(
|
|
|
|
db: &'a DB,
|
|
|
|
input: &'a FxHashMap<ModuleId, Arc<InputModuleItems>>,
|
|
|
|
source_root: SourceRootId,
|
|
|
|
module_tree: Arc<ModuleTree>,
|
|
|
|
) -> Resolver<'a, DB> {
|
|
|
|
Resolver {
|
2018-12-09 03:45:47 -06:00
|
|
|
db,
|
|
|
|
input,
|
2018-12-09 03:24:52 -06:00
|
|
|
source_root,
|
|
|
|
module_tree,
|
|
|
|
result: ItemMap::default(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-11-27 18:42:26 -06:00
|
|
|
pub(crate) fn resolve(mut self) -> Cancelable<ItemMap> {
|
|
|
|
for (&module_id, items) in self.input.iter() {
|
2019-01-01 12:17:52 -06:00
|
|
|
self.populate_module(module_id, Arc::clone(items))?;
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
for &module_id in self.input.keys() {
|
|
|
|
self.db.check_canceled()?;
|
2018-12-09 03:45:47 -06:00
|
|
|
self.resolve_imports(module_id)?;
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
Ok(self.result)
|
|
|
|
}
|
|
|
|
|
2019-01-01 12:17:52 -06:00
|
|
|
fn populate_module(
|
|
|
|
&mut self,
|
|
|
|
module_id: ModuleId,
|
|
|
|
input: Arc<InputModuleItems>,
|
|
|
|
) -> Cancelable<()> {
|
2018-11-27 18:42:26 -06:00
|
|
|
let mut module_items = ModuleScope::default();
|
|
|
|
|
2018-12-09 04:49:54 -06:00
|
|
|
// Populate extern crates prelude
|
|
|
|
{
|
|
|
|
let root_id = module_id.crate_root(&self.module_tree);
|
|
|
|
let file_id = root_id.source(&self.module_tree).file_id();
|
|
|
|
let crate_graph = self.db.crate_graph();
|
2019-01-01 14:21:16 -06:00
|
|
|
if let Some(crate_id) = crate_graph.crate_id_for_crate_root(file_id.as_original_file())
|
|
|
|
{
|
2018-12-09 04:49:54 -06:00
|
|
|
let krate = Crate::new(crate_id);
|
|
|
|
for dep in krate.dependencies(self.db) {
|
|
|
|
if let Some(module) = dep.krate.root_module(self.db)? {
|
2019-01-04 16:37:40 -06:00
|
|
|
let def_id = module.def_id;
|
2018-12-27 11:07:21 -06:00
|
|
|
self.add_module_item(
|
|
|
|
&mut module_items,
|
|
|
|
dep.name.clone(),
|
|
|
|
PerNs::types(def_id),
|
|
|
|
);
|
2018-12-09 04:49:54 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
};
|
|
|
|
}
|
2018-11-27 18:42:26 -06:00
|
|
|
for import in input.imports.iter() {
|
|
|
|
if let Some(name) = import.path.segments.iter().last() {
|
|
|
|
if let ImportKind::Named(import) = import.kind {
|
|
|
|
module_items.items.insert(
|
|
|
|
name.clone(),
|
|
|
|
Resolution {
|
2018-12-24 13:32:39 -06:00
|
|
|
def_id: PerNs::none(),
|
2018-11-27 18:42:26 -06:00
|
|
|
import: Some(import),
|
|
|
|
},
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2018-12-23 10:13:11 -06:00
|
|
|
// Populate explicitly declared items, except modules
|
2018-11-27 18:42:26 -06:00
|
|
|
for item in input.items.iter() {
|
|
|
|
if item.kind == MODULE {
|
|
|
|
continue;
|
|
|
|
}
|
2018-12-24 13:32:39 -06:00
|
|
|
// depending on the item kind, the location can define something in
|
|
|
|
// the values namespace, the types namespace, or both
|
|
|
|
let kind = DefKind::for_syntax_kind(item.kind);
|
|
|
|
let def_id = kind.map(|k| {
|
|
|
|
let def_loc = DefLoc {
|
|
|
|
kind: k,
|
|
|
|
source_root_id: self.source_root,
|
|
|
|
module_id,
|
2019-01-01 12:17:52 -06:00
|
|
|
source_item_id: item.id,
|
2018-12-24 13:32:39 -06:00
|
|
|
};
|
|
|
|
def_loc.id(self.db)
|
|
|
|
});
|
2018-11-27 18:42:26 -06:00
|
|
|
let resolution = Resolution {
|
2018-12-24 13:32:39 -06:00
|
|
|
def_id,
|
2018-11-27 18:42:26 -06:00
|
|
|
import: None,
|
|
|
|
};
|
|
|
|
module_items.items.insert(item.name.clone(), resolution);
|
|
|
|
}
|
|
|
|
|
2018-12-09 04:49:54 -06:00
|
|
|
// Populate modules
|
2018-12-04 14:01:53 -06:00
|
|
|
for (name, module_id) in module_id.children(&self.module_tree) {
|
2018-12-19 09:04:17 -06:00
|
|
|
let def_loc = DefLoc {
|
|
|
|
kind: DefKind::Module,
|
|
|
|
source_root_id: self.source_root,
|
|
|
|
module_id,
|
|
|
|
source_item_id: module_id.source(&self.module_tree).0,
|
|
|
|
};
|
|
|
|
let def_id = def_loc.id(self.db);
|
2018-12-24 13:32:39 -06:00
|
|
|
self.add_module_item(&mut module_items, name, PerNs::types(def_id));
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
self.result.per_module.insert(module_id, module_items);
|
2018-12-09 04:49:54 -06:00
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
2018-12-27 11:07:21 -06:00
|
|
|
fn add_module_item(&self, module_items: &mut ModuleScope, name: Name, def_id: PerNs<DefId>) {
|
2018-12-09 04:49:54 -06:00
|
|
|
let resolution = Resolution {
|
2018-12-24 13:32:39 -06:00
|
|
|
def_id,
|
2018-12-09 04:49:54 -06:00
|
|
|
import: None,
|
|
|
|
};
|
|
|
|
module_items.items.insert(name, resolution);
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
2018-12-09 03:45:47 -06:00
|
|
|
fn resolve_imports(&mut self, module_id: ModuleId) -> Cancelable<()> {
|
2018-11-27 18:42:26 -06:00
|
|
|
for import in self.input[&module_id].imports.iter() {
|
2018-12-09 03:45:47 -06:00
|
|
|
self.resolve_import(module_id, import)?;
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
2018-12-09 03:45:47 -06:00
|
|
|
Ok(())
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
2018-12-09 03:45:47 -06:00
|
|
|
fn resolve_import(&mut self, module_id: ModuleId, import: &Import) -> Cancelable<()> {
|
2018-11-27 18:42:26 -06:00
|
|
|
let ptr = match import.kind {
|
2018-12-09 03:45:47 -06:00
|
|
|
ImportKind::Glob => return Ok(()),
|
2018-11-27 18:42:26 -06:00
|
|
|
ImportKind::Named(ptr) => ptr,
|
|
|
|
};
|
|
|
|
|
2018-12-19 09:04:17 -06:00
|
|
|
let mut curr: ModuleId = match import.path.kind {
|
2018-12-09 04:49:54 -06:00
|
|
|
PathKind::Plain | PathKind::Self_ => module_id,
|
2018-11-27 18:42:26 -06:00
|
|
|
PathKind::Super => {
|
|
|
|
match module_id.parent(&self.module_tree) {
|
|
|
|
Some(it) => it,
|
|
|
|
// TODO: error
|
2018-12-09 03:45:47 -06:00
|
|
|
None => return Ok(()),
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
PathKind::Crate => module_id.crate_root(&self.module_tree),
|
|
|
|
};
|
|
|
|
|
2018-12-09 04:49:54 -06:00
|
|
|
for (i, name) in import.path.segments.iter().enumerate() {
|
2018-11-27 18:42:26 -06:00
|
|
|
let is_last = i == import.path.segments.len() - 1;
|
|
|
|
|
|
|
|
let def_id = match self.result.per_module[&curr].items.get(name) {
|
2018-12-24 13:32:39 -06:00
|
|
|
Some(res) if !res.def_id.is_none() => res.def_id,
|
|
|
|
_ => return Ok(()),
|
2018-11-27 18:42:26 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
if !is_last {
|
2018-12-24 13:32:39 -06:00
|
|
|
let type_def_id = if let Some(d) = def_id.take(Namespace::Types) {
|
|
|
|
d
|
|
|
|
} else {
|
|
|
|
return Ok(());
|
|
|
|
};
|
|
|
|
curr = match type_def_id.loc(self.db) {
|
2018-12-04 14:01:53 -06:00
|
|
|
DefLoc {
|
|
|
|
kind: DefKind::Module,
|
2018-12-19 15:57:13 -06:00
|
|
|
module_id: target_module_id,
|
2018-12-19 09:04:17 -06:00
|
|
|
source_root_id,
|
2018-12-04 14:01:53 -06:00
|
|
|
..
|
2018-12-19 09:04:17 -06:00
|
|
|
} => {
|
|
|
|
if source_root_id == self.source_root {
|
2018-12-19 15:57:13 -06:00
|
|
|
target_module_id
|
2018-12-19 09:04:17 -06:00
|
|
|
} else {
|
2018-12-19 15:57:13 -06:00
|
|
|
let module = Module::new(self.db, source_root_id, target_module_id)?;
|
|
|
|
let path = Path {
|
|
|
|
segments: import.path.segments[i + 1..].iter().cloned().collect(),
|
|
|
|
kind: PathKind::Crate,
|
|
|
|
};
|
2018-12-25 14:14:13 -06:00
|
|
|
let def_id = module.resolve_path(self.db, &path)?;
|
2018-12-24 13:32:39 -06:00
|
|
|
if !def_id.is_none() {
|
2018-12-19 15:57:13 -06:00
|
|
|
self.update(module_id, |items| {
|
|
|
|
let res = Resolution {
|
2018-12-24 13:32:39 -06:00
|
|
|
def_id: def_id,
|
2018-12-19 15:57:13 -06:00
|
|
|
import: Some(ptr),
|
|
|
|
};
|
|
|
|
items.items.insert(name.clone(), res);
|
|
|
|
})
|
|
|
|
}
|
2018-12-19 09:04:17 -06:00
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
}
|
2018-12-09 03:45:47 -06:00
|
|
|
_ => return Ok(()),
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
self.update(module_id, |items| {
|
|
|
|
let res = Resolution {
|
2018-12-24 13:32:39 -06:00
|
|
|
def_id: def_id,
|
2018-11-27 18:42:26 -06:00
|
|
|
import: Some(ptr),
|
|
|
|
};
|
|
|
|
items.items.insert(name.clone(), res);
|
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
2018-12-09 03:45:47 -06:00
|
|
|
Ok(())
|
2018-11-27 18:42:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
fn update(&mut self, module_id: ModuleId, f: impl FnOnce(&mut ModuleScope)) {
|
|
|
|
let module_items = self.result.per_module.get_mut(&module_id).unwrap();
|
|
|
|
f(module_items)
|
|
|
|
}
|
|
|
|
}
|
2018-11-28 07:19:01 -06:00
|
|
|
|
|
|
|
#[cfg(test)]
|
2018-12-09 03:48:55 -06:00
|
|
|
mod tests;
|