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Diffstat (limited to 'crates/hir-def/src/expr_store.rs')
| -rw-r--r-- | crates/hir-def/src/expr_store.rs | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/crates/hir-def/src/expr_store.rs b/crates/hir-def/src/expr_store.rs index f617c3225a..85bd193223 100644 --- a/crates/hir-def/src/expr_store.rs +++ b/crates/hir-def/src/expr_store.rs @@ -9,7 +9,10 @@ pub mod scope; #[cfg(test)] mod tests; -use std::ops::{Deref, Index}; +use std::{ + ops::{Deref, Index}, + sync::LazyLock, +}; use cfg::{CfgExpr, CfgOptions}; use either::Either; @@ -19,6 +22,7 @@ use rustc_hash::FxHashMap; use smallvec::SmallVec; use span::{Edition, SyntaxContext}; use syntax::{AstPtr, SyntaxNodePtr, ast}; +use triomphe::Arc; use tt::TextRange; use crate::{ @@ -220,6 +224,12 @@ impl ExpressionStoreBuilder { } impl ExpressionStore { + pub fn empty_singleton() -> Arc<Self> { + static EMPTY: LazyLock<Arc<ExpressionStore>> = + LazyLock::new(|| Arc::new(ExpressionStoreBuilder::default().finish())); + EMPTY.clone() + } + /// Returns an iterator over all block expressions in this store that define inner items. pub fn blocks<'a>( &'a self, @@ -636,6 +646,12 @@ impl Index<PathId> for ExpressionStore { // FIXME: Change `node_` prefix to something more reasonable. // Perhaps `expr_syntax` and `expr_id`? impl ExpressionStoreSourceMap { + pub fn empty_singleton() -> Arc<Self> { + static EMPTY: LazyLock<Arc<ExpressionStoreSourceMap>> = + LazyLock::new(|| Arc::new(ExpressionStoreSourceMap::default())); + EMPTY.clone() + } + pub fn expr_or_pat_syntax(&self, id: ExprOrPatId) -> Result<ExprOrPatSource, SyntheticSyntax> { match id { ExprOrPatId::ExprId(id) => self.expr_syntax(id), |