if i + 1 < tts.len() {
self.tts.push((tts, i + 1));
}
- if let TokenTree::Token(sp, tok) = tt {
- TokenAndSpan { tok: tok, sp: sp }
- } else {
- self.tts.push((tt, 0));
- continue
+ // FIXME(jseyfried): remove after fixing #39390 in #39419.
+ if self.quote_depth > 0 {
+ if let TokenTree::Sequence(sp, _) = tt {
+ self.span_err(sp, "attempted to repeat an expression containing no \
+ syntax variables matched as repeating at this depth");
+ }
+ }
+ match tt {
+ TokenTree::Token(sp, tok) => TokenAndSpan { tok: tok, sp: sp },
+ _ if tt.len() > 0 => {
+ self.tts.push((tt, 0));
+ continue
+ }
+ _ => continue,
}
} else {
TokenAndSpan { tok: token::Eof, sp: self.span }
--- /dev/null
+// Copyright 2017 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.
+
+fn main() {
+ println!("{}", { macro_rules! x { ($()*) => {} } 33 });
+ //~^ ERROR no syntax variables matched as repeating at this depth
+}
+