From 2a01e263bcb2d826f2a398b4c34b59485a201274 Mon Sep 17 00:00:00 2001 From: Vadim Petrochenkov Date: Mon, 9 Nov 2015 22:16:30 +0300 Subject: [PATCH] Improve error message --- src/libsyntax/feature_gate.rs | 2 ++ src/test/compile-fail/issue-12560-1.rs | 2 ++ 2 files changed, 4 insertions(+) diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs index a0c089aff217..94b5cf46dd1c 100644 --- a/src/libsyntax/feature_gate.rs +++ b/src/libsyntax/feature_gate.rs @@ -867,6 +867,8 @@ impl<'a, 'v> Visitor<'v> for PostExpansionVisitor<'a> { self.context.span_handler.span_err(span, "empty tuple structs and enum variants \ are not allowed, use unit structs and \ enum variants instead"); + self.context.span_handler.span_help(span, "remove trailing () to make a unit \ + struct or unit enum varian"); } } visit::walk_struct_def(self, s) diff --git a/src/test/compile-fail/issue-12560-1.rs b/src/test/compile-fail/issue-12560-1.rs index de13cb465db9..d0fb91a576c0 100644 --- a/src/test/compile-fail/issue-12560-1.rs +++ b/src/test/compile-fail/issue-12560-1.rs @@ -14,7 +14,9 @@ enum Foo { Bar(), //~ ERROR empty tuple structs and enum variants are not allowed + //~^ HELP remove trailing () to make a unit struct or unit enum varian Baz(), //~ ERROR empty tuple structs and enum variants are not allowed + //~^ HELP remove trailing () to make a unit struct or unit enum varian Bazar }