From 78c3e4a23cb300cb415b4cb41851adb1a9fe5fb4 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Thu, 22 Oct 2020 19:42:39 +0200
Subject: Hide paramater inlay hints for cloned vars if applicable

---
 crates/ide/src/inlay_hints.rs | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

(limited to 'crates/ide')

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()),
@@ -1205,6 +1209,29 @@ fn main() {
     let iter_of_iters = some_iter.take(2);
       //^^^^^^^^^^^^^ impl Iterator<Item = impl Iterator<Item = i32>>
 }
+"#,
+        );
+    }
+
+    #[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
+}
 "#,
         );
     }
-- 
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