Merge #4146

4146: Don't add call parens when an fn type is expected r=matklad a=jonas-schievink

This is pretty useful when dealing with callback- or fn-pointer-heavy FFI code, as I have recently.

Co-authored-by: Jonas Schievink <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index 3f645a1dd..fb788736d 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -1136,6 +1136,13 @@ impl Type {
         matches!(&self.ty.value, Ty::Apply(ApplicationTy { ctor: TypeCtor::Closure { .. }, .. }))
     }
 
+    pub fn is_fn(&self) -> bool {
+        matches!(&self.ty.value,
+            Ty::Apply(ApplicationTy { ctor: TypeCtor::FnDef(..), .. }) |
+            Ty::Apply(ApplicationTy { ctor: TypeCtor::FnPtr { .. }, .. })
+        )
+    }
+
     pub fn contains_unknown(&self) -> bool {
         return go(&self.ty.value);