63 lines
1.7 KiB
Rust
63 lines
1.7 KiB
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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macro_rules! foo {
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( $()* ) => {};
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//~^ ERROR repetition matches empty token tree
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( $()+ ) => {};
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//~^ ERROR repetition matches empty token tree
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( $(),* ) => {}; // PASS
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( $(),+ ) => {}; // PASS
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( [$()*] ) => {};
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//~^ ERROR repetition matches empty token tree
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( [$()+] ) => {};
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//~^ ERROR repetition matches empty token tree
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( [$(),*] ) => {}; // PASS
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( [$(),+] ) => {}; // PASS
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( $($()* $(),* $(a)* $(a),* )* ) => {};
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//~^ ERROR repetition matches empty token tree
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( $($()* $(),* $(a)* $(a),* )+ ) => {};
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//~^ ERROR repetition matches empty token tree
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( $(a $(),* $(a)* $(a),* )* ) => {}; // PASS
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( $($(a)+ $(),* $(a)* $(a),* )+ ) => {}; // PASS
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( $(a $()+)* ) => {};
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//~^ ERROR repetition matches empty token tree
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( $(a $()*)+ ) => {};
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//~^ ERROR repetition matches empty token tree
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}
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// --- Original Issue --- //
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macro_rules! make_vec {
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(a $e1:expr $($(, a $e2:expr)*)*) => ([$e1 $($(, $e2)*)*]);
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//~^ ERROR repetition matches empty token tree
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}
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fn main() {
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let _ = make_vec!(a 1, a 2, a 3);
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}
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// --- Minified Issue --- //
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macro_rules! m {
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( $()* ) => {}
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//~^ ERROR repetition matches empty token tree
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}
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m!();
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