Remove box syntax from rustc_typeck

Author: est31

compiler/rustc_typeck/src/check/_match.rs

@@ -159,16 +159,18 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     0 => (arm_span, ObligationCauseCode::BlockTailExpression(arm.body.hir_id)),
                     _ => (
                         expr.span,
-                        ObligationCauseCode::MatchExpressionArm(box MatchExpressionArmCause {
-                            arm_span,
-                            scrut_span: scrut.span,
-                            semi_span,
-                            source: match_src,
-                            prior_arms: other_arms.clone(),
-                            last_ty: prior_arm_ty.unwrap(),
-                            scrut_hir_id: scrut.hir_id,
-                            opt_suggest_box_span,
-                        }),
+                        ObligationCauseCode::MatchExpressionArm(Box::new(
+                            MatchExpressionArmCause {
+                                arm_span,
+                                scrut_span: scrut.span,
+                                semi_span,
+                                source: match_src,
+                                prior_arms: other_arms.clone(),
+                                last_ty: prior_arm_ty.unwrap(),
+                                scrut_hir_id: scrut.hir_id,
+                                opt_suggest_box_span,
+                            },
+                        )),
                     ),
                 };
                 let cause = self.cause(span, code);
@@ -482,13 +484,13 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         // Finally construct the cause:
         self.cause(
             error_sp,
-            ObligationCauseCode::IfExpression(box IfExpressionCause {
+            ObligationCauseCode::IfExpression(Box::new(IfExpressionCause {
                 then: then_sp,
                 else_sp: error_sp,
                 outer: outer_sp,
                 semicolon: remove_semicolon,
                 opt_suggest_box_span,
-            }),
+            })),
         )
     }
 

compiler/rustc_typeck/src/lib.rs

@@ -58,7 +58,6 @@ This API is completely unstable and subject to change.
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![cfg_attr(bootstrap, feature(bindings_after_at))]
 #![feature(bool_to_option)]
-#![feature(box_syntax)]
 #![feature(crate_visibility_modifier)]
 #![feature(format_args_capture)]
 #![feature(in_band_lifetimes)]