Always error on invalid macro fragment specifiers

Fixes #21370.

unused-macro-with-follow-violation.rs was already handled correctly. That test
is just for good measure. :)

2 files changed, 32 insertions, 0 deletions

diff --git a/src/test/compile-fail/unused-macro-with-bad-frag-spec.rs b/src/test/compile-fail/unused-macro-with-bad-frag-spec.rs
new file mode 100644
index 00000000000..b868b79365d
--- /dev/null
+++ b/src/test/compile-fail/unused-macro-with-bad-frag-spec.rs
@@ -0,0 +1,17 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Issue #21370
+
+macro_rules! test {
+    ($wrong:t_ty) => () //~ ERROR invalid fragment specifier `t_ty`
+}
+
+fn main() { }
diff --git a/src/test/compile-fail/unused-macro-with-follow-violation.rs b/src/test/compile-fail/unused-macro-with-follow-violation.rs
new file mode 100644
index 00000000000..e9d09bb6ad9
--- /dev/null
+++ b/src/test/compile-fail/unused-macro-with-follow-violation.rs
@@ -0,0 +1,15 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+macro_rules! test {
+    ($e:expr +) => () //~ ERROR not allowed for `expr` fragments
+}
+
+fn main() { }