bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir-ty/src/builder.rs')
-rw-r--r--crates/hir-ty/src/builder.rs19
1 files changed, 19 insertions, 0 deletions
diff --git a/crates/hir-ty/src/builder.rs b/crates/hir-ty/src/builder.rs
index 97924569cc..2362b08f79 100644
--- a/crates/hir-ty/src/builder.rs
+++ b/crates/hir-ty/src/builder.rs
@@ -232,6 +232,25 @@ impl TyBuilder<()> {
TyBuilder::new((), params, parent_subst)
}
+ pub fn subst_for_closure(
+ db: &dyn HirDatabase,
+ parent: DefWithBodyId,
+ sig_ty: Ty,
+ ) -> Substitution {
+ let sig_ty = sig_ty.cast(Interner);
+ let self_subst = iter::once(&sig_ty);
+ let Some(parent) = parent.as_generic_def_id() else {
+ return Substitution::from_iter(Interner, self_subst);
+ };
+ Substitution::from_iter(
+ Interner,
+ self_subst
+ .chain(generics(db.upcast(), parent).placeholder_subst(db).iter(Interner))
+ .cloned()
+ .collect::<Vec<_>>(),
+ )
+ }
+
pub fn build(self) -> Substitution {
let ((), subst) = self.build_internal();
subst