207 lines
7.7 KiB
Rust
207 lines
7.7 KiB
Rust
use ra_db::{SourceRootId, FileId};
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use ra_syntax::{ast, SyntaxNode, AstNode, TreeArc};
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use crate::{
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Module, ModuleSource, Problem,
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Crate, DefId, DefLoc, DefKind, Name, Path, PathKind, PerNs, Def,
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module_tree::ModuleId,
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nameres::{ModuleScope, lower::ImportId},
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db::HirDatabase,
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};
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impl Module {
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pub(crate) fn new(def_id: DefId) -> Self {
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crate::code_model_api::Module { def_id }
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}
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pub(crate) fn from_module_id(
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db: &impl HirDatabase,
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source_root_id: SourceRootId,
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module_id: ModuleId,
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) -> Self {
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let module_tree = db.module_tree(source_root_id);
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let def_loc = DefLoc {
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kind: DefKind::Module,
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source_root_id,
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module_id,
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source_item_id: module_id.source(&module_tree),
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};
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let def_id = def_loc.id(db);
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Module::new(def_id)
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}
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pub(crate) fn name_impl(&self, db: &impl HirDatabase) -> Option<Name> {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let link = loc.module_id.parent_link(&module_tree)?;
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Some(link.name(&module_tree).clone())
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}
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pub(crate) fn definition_source_impl(&self, db: &impl HirDatabase) -> (FileId, ModuleSource) {
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let loc = self.def_id.loc(db);
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let file_id = loc.source_item_id.file_id.as_original_file();
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let syntax_node = db.file_item(loc.source_item_id);
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let module_source = if let Some(source_file) = ast::SourceFile::cast(&syntax_node) {
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ModuleSource::SourceFile(source_file.to_owned())
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} else {
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let module = ast::Module::cast(&syntax_node).unwrap();
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ModuleSource::Module(module.to_owned())
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};
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(file_id, module_source)
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}
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pub(crate) fn declaration_source_impl(
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&self,
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db: &impl HirDatabase,
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) -> Option<(FileId, TreeArc<ast::Module>)> {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let link = loc.module_id.parent_link(&module_tree)?;
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let file_id = link
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.owner(&module_tree)
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.source(&module_tree)
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.file_id
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.as_original_file();
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let src = link.source(&module_tree, db);
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Some((file_id, src))
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}
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pub(crate) fn import_source_impl(
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&self,
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db: &impl HirDatabase,
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import: ImportId,
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) -> TreeArc<ast::PathSegment> {
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let loc = self.def_id.loc(db);
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let source_map = db.lower_module_source_map(loc.source_root_id, loc.module_id);
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let (_, source) = self.definition_source(db);
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source_map.get(&source, import)
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}
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pub(crate) fn krate_impl(&self, db: &impl HirDatabase) -> Option<Crate> {
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let root = self.crate_root(db);
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let loc = root.def_id.loc(db);
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let file_id = loc.source_item_id.file_id.as_original_file();
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let crate_graph = db.crate_graph();
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let crate_id = crate_graph.crate_id_for_crate_root(file_id)?;
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Some(Crate::new(crate_id))
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}
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pub(crate) fn crate_root_impl(&self, db: &impl HirDatabase) -> Module {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let module_id = loc.module_id.crate_root(&module_tree);
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Module::from_module_id(db, loc.source_root_id, module_id)
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}
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/// Finds a child module with the specified name.
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pub(crate) fn child_impl(&self, db: &impl HirDatabase, name: &Name) -> Option<Module> {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let child_id = loc.module_id.child(&module_tree, name)?;
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Some(Module::from_module_id(db, loc.source_root_id, child_id))
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}
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/// Iterates over all child modules.
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pub(crate) fn children_impl(&self, db: &impl HirDatabase) -> impl Iterator<Item = Module> {
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// FIXME this should be implementable without collecting into a vec, but
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// it's kind of hard since the iterator needs to keep a reference to the
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// module tree.
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let children = loc
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.module_id
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.children(&module_tree)
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.map(|(_, module_id)| Module::from_module_id(db, loc.source_root_id, module_id))
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.collect::<Vec<_>>();
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children.into_iter()
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}
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pub(crate) fn parent_impl(&self, db: &impl HirDatabase) -> Option<Module> {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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let parent_id = loc.module_id.parent(&module_tree)?;
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Some(Module::from_module_id(db, loc.source_root_id, parent_id))
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}
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/// Returns a `ModuleScope`: a set of items, visible in this module.
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pub(crate) fn scope_impl(&self, db: &impl HirDatabase) -> ModuleScope {
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let loc = self.def_id.loc(db);
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let item_map = db.item_map(loc.source_root_id);
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item_map.per_module[&loc.module_id].clone()
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}
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pub(crate) fn resolve_path_impl(&self, db: &impl HirDatabase, path: &Path) -> PerNs<DefId> {
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let mut curr_per_ns = PerNs::types(
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match path.kind {
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PathKind::Crate => self.crate_root(db),
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PathKind::Self_ | PathKind::Plain => self.clone(),
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PathKind::Super => {
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if let Some(p) = self.parent(db) {
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p
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} else {
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return PerNs::none();
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}
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}
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PathKind::Abs => {
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// TODO: absolute use is not supported
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return PerNs::none();
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}
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}
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.def_id,
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);
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for segment in path.segments.iter() {
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let curr = match curr_per_ns.as_ref().take_types() {
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Some(r) => r,
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None => {
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// we still have path segments left, but the path so far
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// didn't resolve in the types namespace => no resolution
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// (don't break here because curr_per_ns might contain
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// something in the value namespace, and it would be wrong
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// to return that)
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return PerNs::none();
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}
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};
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// resolve segment in curr
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curr_per_ns = match curr.resolve(db) {
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Def::Module(m) => {
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let scope = m.scope(db);
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match scope.get(&segment.name) {
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Some(r) => r.def_id,
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None => PerNs::none(),
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}
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}
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Def::Enum(e) => {
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// enum variant
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let matching_variant = e
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.variants(db)
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.into_iter()
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.find(|(n, _variant)| n == &segment.name);
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match matching_variant {
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Some((_n, variant)) => PerNs::both(variant.def_id(), e.def_id()),
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None => PerNs::none(),
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}
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}
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_ => {
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// could be an inherent method call in UFCS form
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// (`Struct::method`), or some other kind of associated
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// item... Which we currently don't handle (TODO)
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PerNs::none()
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}
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};
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}
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curr_per_ns
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}
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pub(crate) fn problems_impl(
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&self,
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db: &impl HirDatabase,
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) -> Vec<(TreeArc<SyntaxNode>, Problem)> {
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let loc = self.def_id.loc(db);
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let module_tree = db.module_tree(loc.source_root_id);
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loc.module_id.problems(&module_tree, db)
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}
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}
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