Add catch expr to AST and disallow catch as a struct name

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index e7bf16eae9e..15913d56d16 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -339,6 +339,9 @@ declare_features! (
 
     // `extern "x86-interrupt" fn()`
     (active, abi_x86_interrupt, "1.17.0", Some(40180)),
+
+    // Allows the `catch {...}` expression
+    (active, catch_expr, "1.17.0", Some(31436)),
 );
 
 declare_features! (
@@ -1287,6 +1290,9 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                     }
                 }
             }
+            ast::ExprKind::Catch(_) => {
+                gate_feature_post!(&self, catch_expr, e.span, "`catch` expression is experimental");
+            }
             _ => {}
         }
         visit::walk_expr(self, e);