lint: port no-op method call diagnostics

Signed-off-by: David Wood <david.wood@huawei.com>

1 files changed, 7 insertions, 12 deletions

diff --git a/compiler/rustc_lint/src/noop_method_call.rs b/compiler/rustc_lint/src/noop_method_call.rs
index 675bee738a6..2e847c8b89c 100644
--- a/compiler/rustc_lint/src/noop_method_call.rs
+++ b/compiler/rustc_lint/src/noop_method_call.rs
@@ -2,6 +2,7 @@ use crate::context::LintContext;
 use crate::rustc_middle::ty::TypeFoldable;
 use crate::LateContext;
 use crate::LateLintPass;
+use rustc_errors::fluent;
 use rustc_hir::def::DefKind;
 use rustc_hir::{Expr, ExprKind};
 use rustc_middle::ty;
@@ -80,7 +81,6 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
         ) {
             return;
         }
-        let method = &call.ident.name;
         let receiver = &elements[0];
         let receiver_ty = cx.typeck_results().expr_ty(receiver);
         let expr_ty = cx.typeck_results().expr_ty_adjusted(expr);
@@ -90,19 +90,14 @@ impl<'tcx> LateLintPass<'tcx> for NoopMethodCall {
             return;
         }
         let expr_span = expr.span;
-        let note = format!(
-            "the type `{:?}` which `{}` is being called on is the same as \
-             the type returned from `{}`, so the method call does not do \
-             anything and can be removed",
-            receiver_ty, method, method,
-        );
-
         let span = expr_span.with_lo(receiver.span.hi());
         cx.struct_span_lint(NOOP_METHOD_CALL, span, |lint| {
-            let method = &call.ident.name;
-            let message =
-                format!("call to `.{}()` on a reference in this situation does nothing", &method,);
-            lint.build(&message).span_label(span, "unnecessary method call").note(&note).emit();
+            lint.build(fluent::lint::noop_method_call)
+                .set_arg("method", call.ident.name)
+                .set_arg("receiver_ty", receiver_ty)
+                .span_label(span, fluent::lint::label)
+                .note(fluent::lint::note)
+                .emit();
         });
     }
 }