1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // The logic for parsing Kleene operators in macros has a special case to disambiguate `?`.
12 // Specifically, `$(pat)?` is the ZeroOrOne operator whereas `$(pat)?+` or `$(pat)?*` are the
13 // ZeroOrMore and OneOrMore operators using `?` as a separator. These tests are intended to
14 // exercise that logic in the macro parser.
16 // Moreover, we also throw in some tests for using a separator with `?`, which is meaningless but
17 // included for consistency with `+` and `*`.
19 // This test focuses on non-error cases and making sure the correct number of repetitions happen.
21 // compile-flags: --edition=2018
23 #![feature(macro_at_most_once_rep)]
26 ($($a:ident)? ; $num:expr) => { {
40 // accept 0 or 1 repetitions