101 lines
3.1 KiB
Rust
101 lines
3.1 KiB
Rust
//! Utilities for mapping between hir IDs and the surface syntax.
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use hir_expand::InFile;
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use la_arena::ArenaMap;
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use syntax::ast;
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use crate::{
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db::DefDatabase, item_tree::ItemTreeNode, AssocItemLoc, ItemLoc, Lookup, Macro2Loc,
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MacroRulesLoc, ProcMacroLoc, UseId,
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};
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pub trait HasSource {
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type Value;
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fn source(&self, db: &dyn DefDatabase) -> InFile<Self::Value>;
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}
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impl<N: ItemTreeNode> HasSource for AssocItemLoc<N> {
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type Value = N::Source;
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fn source(&self, db: &dyn DefDatabase) -> InFile<N::Source> {
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let tree = self.id.item_tree(db);
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let ast_id_map = db.ast_id_map(self.id.file_id());
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let root = db.parse_or_expand(self.id.file_id());
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let node = &tree[self.id.value];
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InFile::new(self.id.file_id(), ast_id_map.get(node.ast_id()).to_node(&root))
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}
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}
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impl<N: ItemTreeNode> HasSource for ItemLoc<N> {
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type Value = N::Source;
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fn source(&self, db: &dyn DefDatabase) -> InFile<N::Source> {
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let tree = self.id.item_tree(db);
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let ast_id_map = db.ast_id_map(self.id.file_id());
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let root = db.parse_or_expand(self.id.file_id());
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let node = &tree[self.id.value];
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InFile::new(self.id.file_id(), ast_id_map.get(node.ast_id()).to_node(&root))
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}
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}
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impl HasSource for Macro2Loc {
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type Value = ast::MacroDef;
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fn source(&self, db: &dyn DefDatabase) -> InFile<Self::Value> {
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let tree = self.id.item_tree(db);
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let ast_id_map = db.ast_id_map(self.id.file_id());
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let root = db.parse_or_expand(self.id.file_id());
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let node = &tree[self.id.value];
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InFile::new(self.id.file_id(), ast_id_map.get(node.ast_id()).to_node(&root))
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}
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}
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impl HasSource for MacroRulesLoc {
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type Value = ast::MacroRules;
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fn source(&self, db: &dyn DefDatabase) -> InFile<Self::Value> {
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let tree = self.id.item_tree(db);
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let ast_id_map = db.ast_id_map(self.id.file_id());
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let root = db.parse_or_expand(self.id.file_id());
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let node = &tree[self.id.value];
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InFile::new(self.id.file_id(), ast_id_map.get(node.ast_id()).to_node(&root))
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}
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}
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impl HasSource for ProcMacroLoc {
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type Value = ast::Fn;
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fn source(&self, db: &dyn DefDatabase) -> InFile<Self::Value> {
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let tree = self.id.item_tree(db);
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let ast_id_map = db.ast_id_map(self.id.file_id());
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let root = db.parse_or_expand(self.id.file_id());
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let node = &tree[self.id.value];
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InFile::new(self.id.file_id(), ast_id_map.get(node.ast_id()).to_node(&root))
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}
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}
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pub trait HasChildSource<ChildId> {
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type Value;
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fn child_source(&self, db: &dyn DefDatabase) -> InFile<ArenaMap<ChildId, Self::Value>>;
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}
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impl HasChildSource<la_arena::Idx<ast::UseTree>> for UseId {
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type Value = ast::UseTree;
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fn child_source(
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&self,
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db: &dyn DefDatabase,
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) -> InFile<ArenaMap<la_arena::Idx<ast::UseTree>, Self::Value>> {
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let loc = &self.lookup(db);
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let use_ = &loc.id.item_tree(db)[loc.id.value];
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InFile::new(
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loc.id.file_id(),
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use_.use_tree_source_map(db, loc.id.file_id()).into_iter().collect(),
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)
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}
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}
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