33 lines
873 B
Rust
33 lines
873 B
Rust
// Copyright 2015 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! m {
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($e:expr) => {
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"expr includes attr"
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};
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(#[$attr:meta] $e:expr) => {
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"expr excludes attr"
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}
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}
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macro_rules! n {
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(#[$attr:meta] $e:expr) => {
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"expr excludes attr"
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};
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($e:expr) => {
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"expr includes attr"
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}
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}
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fn main() {
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assert_eq!(m!(#[attr] 1), "expr includes attr");
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assert_eq!(n!(#[attr] 1), "expr excludes attr");
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}
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