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Merge #1970

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1970: refactor: removed clap_count_exprs macro r=pksunkara a=stedingan



Co-authored-by: Andreas Steding <steding.andreas@gmail.com>
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bors[bot] 2020-06-10 06:59:00 +00:00 committed by GitHub
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src/macros.rs
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@ -31,35 +31,6 @@ macro_rules! load_yaml {
}; };
} }
// _clap_count_exprs! is derived from https://github.com/DanielKeep/rust-grabbag
// commit: 82a35ca5d9a04c3b920622d542104e3310ee5b07
// License: MIT
// Copyright ⓒ 2015 grabbag contributors.
// Licensed under the MIT license (see LICENSE or <http://opensource.org
// /licenses/MIT>) or the Apache License, Version 2.0 (see LICENSE of
// <http://www.apache.org/licenses/LICENSE-2.0>), at your option. All
// files in the project carrying such notice may not be copied, modified,
// or distributed except according to those terms.
//
/// Counts the number of comma-delimited expressions passed to it. The result is a compile-time
/// evaluable expression, suitable for use as a static array size, or the value of a `const`.
///
/// # Examples
///
/// ```
/// # #[macro_use] extern crate clap;
/// # fn main() {
/// const COUNT: usize = _clap_count_exprs!(a, 5+1, "hi there!".into_string());
/// assert_eq!(COUNT, 3);
/// # }
/// ```
#[macro_export]
macro_rules! _clap_count_exprs {
() => { 0 };
($e:expr) => { 1 };
($e:expr, $($es:expr),+) => { 1 + $crate::_clap_count_exprs!($($es),*) };
}
/// Allows you to pull the version from your Cargo.toml at compile time as /// Allows you to pull the version from your Cargo.toml at compile time as
/// `MAJOR.MINOR.PATCH_PKGVERSION_PRE` /// `MAJOR.MINOR.PATCH_PKGVERSION_PRE`
/// ///