From 88f125ebc97b291e56fae77cdb5a1c2938418e8f Mon Sep 17 00:00:00 2001
From: Vincent Esche <regexident@gmail.com>
Date: Wed, 29 May 2024 19:41:55 +0200
Subject: [PATCH] =?UTF-8?q?Add=20`Function::fn=5Fptr=5Ftype(=E2=80=A6)`=20?=
 =?UTF-8?q?for=20obtaining=20name-erased=20function=20type?=
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---
 src/tools/rust-analyzer/crates/hir/src/lib.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/tools/rust-analyzer/crates/hir/src/lib.rs b/src/tools/rust-analyzer/crates/hir/src/lib.rs
index 777be711a5e6..963ad6ca993c 100644
--- a/src/tools/rust-analyzer/crates/hir/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/hir/src/lib.rs
@@ -1884,6 +1884,14 @@ impl Function {
         Type::from_value_def(db, self.id)
     }
 
+    pub fn fn_ptr_type(self, db: &dyn HirDatabase) -> Type {
+        let resolver = self.id.resolver(db.upcast());
+        let substs = TyBuilder::placeholder_subst(db, self.id);
+        let callable_sig = db.callable_item_signature(self.id.into()).substitute(Interner, &substs);
+        let ty = TyKind::Function(callable_sig.to_fn_ptr()).intern(Interner);
+        Type::new_with_resolver_inner(db, &resolver, ty)
+    }
+
     /// Get this function's return type
     pub fn ret_type(self, db: &dyn HirDatabase) -> Type {
         let resolver = self.id.resolver(db.upcast());