Merge #6326

6326: hide paramater inlay hints for cloned vars if applicable r=SomeoneToIgnore a=Veykril

This causes `foo.clone()` parameters to be handled as if they were just `foo` parameters for inlay hint logic.

Fixes #6315 

Co-authored-by: Lukas Wirth <[email protected]>

1 files changed, 28 insertions, 1 deletions

diff --git a/crates/ide/src/inlay_hints.rs b/crates/ide/src/inlay_hints.rs
index cccea129a..49d8e4ae1 100644
--- a/crates/ide/src/inlay_hints.rs
+++ b/crates/ide/src/inlay_hints.rs
@@ -378,7 +378,11 @@ fn is_enum_name_similar_to_param_name(
 fn get_string_representation(expr: &ast::Expr) -> Option<String> {
     match expr {
         ast::Expr::MethodCallExpr(method_call_expr) => {
-            Some(method_call_expr.name_ref()?.to_string())
+            let name_ref = method_call_expr.name_ref()?;
+            match name_ref.text().as_str() {
+                "clone" => method_call_expr.receiver().map(|rec| rec.to_string()),
+                name_ref => Some(name_ref.to_owned()),
+            }
         }
         ast::Expr::RefExpr(ref_expr) => get_string_representation(&ref_expr.expr()?),
         _ => Some(expr.to_string()),
@@ -1208,4 +1212,27 @@ fn main() {
 "#,
         );
     }
+
+    #[test]
+    fn hide_param_hints_for_clones() {
+        check_with_config(
+            InlayHintsConfig {
+                parameter_hints: true,
+                type_hints: false,
+                chaining_hints: false,
+                max_length: None,
+            },
+            r#"
+fn foo(bar: i32, baz: String, qux: f32) {}
+
+fn main() {
+    let bar = 3;
+    let baz = &"baz";
+    let fez = 1.0;
+    foo(bar.clone(), baz.clone(), fez.clone());
+                                //^^^^^^^^^^^ qux
+}
+"#,
+        );
+    }
 }