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authorJonas Schievink <[email protected]>2021-05-23 15:28:23 +0100
committerJonas Schievink <[email protected]>2021-05-23 15:28:23 +0100
commit11825ac5fee8616ea7de2c80b5298978e7906bf1 (patch)
treeb21ff5fa69a61dcb16868bb21457a7b4117c22fb /crates/hir_def
parent064ff633f6055ed35022222c89af01d3f9943e3c (diff)
Explain why nested `TypeRef` aren't interned
Diffstat (limited to 'crates/hir_def')
-rw-r--r--crates/hir_def/src/type_ref.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/crates/hir_def/src/type_ref.rs b/crates/hir_def/src/type_ref.rs
index 9e44547cb..cdcab7110 100644
--- a/crates/hir_def/src/type_ref.rs
+++ b/crates/hir_def/src/type_ref.rs
@@ -72,6 +72,10 @@ impl TraitRef {
72} 72}
73 73
74/// Compare ty::Ty 74/// Compare ty::Ty
75///
76/// Note: Most users of `TypeRef` that end up in the salsa database intern it using
77/// `Interned<TypeRef>` to save space. But notably, nested `TypeRef`s are not interned, since that
78/// does not seem to save any noticeable amount of memory.
75#[derive(Clone, PartialEq, Eq, Hash, Debug)] 79#[derive(Clone, PartialEq, Eq, Hash, Debug)]
76pub enum TypeRef { 80pub enum TypeRef {
77 Never, 81 Never,