Use Option::map() instead of if let

Author: FabianWolff

compiler/rustc_driver/src/pretty.rs

@@ -324,16 +324,12 @@ impl<'tcx> pprust_hir::PpAnn for TypedAnnotation<'tcx> {
     }
     fn post(&self, s: &mut pprust_hir::State<'_>, node: pprust_hir::AnnNode<'_>) {
         if let pprust_hir::AnnNode::Expr(expr) = node {
-            let typeck_results =
-                self.maybe_typeck_results.get().or_else(|| {
-                    if let Some(body_id) = self.tcx.hir().maybe_body_owned_by(
-                        self.tcx.hir().local_def_id_to_hir_id(expr.hir_id.owner),
-                    ) {
-                        Some(self.tcx.typeck_body(body_id))
-                    } else {
-                        None
-                    }
-                });
+            let typeck_results = self.maybe_typeck_results.get().or_else(|| {
+                self.tcx
+                    .hir()
+                    .maybe_body_owned_by(self.tcx.hir().local_def_id_to_hir_id(expr.hir_id.owner))
+                    .map(|body_id| self.tcx.typeck_body(body_id))
+            });
 
             if let Some(typeck_results) = typeck_results {
                 s.s.space();