27 lines
1019 B
Rust
27 lines
1019 B
Rust
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Test of allowing two sequences repetitions in a row,
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// functionality added as byproduct of RFC amendment #1384
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// https://github.com/rust-lang/rfcs/pull/1384
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// Old version of Rust would reject this macro definition, even though
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// there are no local ambiguities (the initial `banana` and `orange`
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// tokens are enough for the expander to distinguish which case is
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// intended).
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macro_rules! foo {
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( $(banana $a:ident)* $(orange $b:tt)* ) => { };
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}
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fn main() {
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foo!( banana id1 banana id2
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orange hi orange (hello world) );
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}
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