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Remove duplicated if_let_chain! macro definition

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This commit is contained in:
mcarton 2015-12-22 00:48:50 +01:00
parent cd3c649adb
commit 0e4259a827
1 changed files with 0 additions and 46 deletions
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46
src/utils.rs
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@ -370,52 +370,6 @@ pub fn is_adjusted(cx: &LateContext, e: &Expr) -> bool {
cx.tcx.tables.borrow().adjustments.get(&e.id).is_some() cx.tcx.tables.borrow().adjustments.get(&e.id).is_some()
} }
/// Produce a nested chain of if-lets and ifs from the patterns:
///
/// if_let_chain! {
/// [
/// Some(y) = x,
/// y.len() == 2,
/// Some(z) = y,
/// ],
/// {
/// block
/// }
/// }
///
/// becomes
///
/// if let Some(y) = x {
/// if y.len() == 2 {
/// if let Some(z) = y {
/// block
/// }
/// }
/// }
#[macro_export]
macro_rules! if_let_chain {
([let $pat:pat = $expr:expr, $($tt:tt)+], $block:block) => {
if let $pat = $expr {
if_let_chain!{ [$($tt)+], $block }
}
};
([let $pat:pat = $expr:expr], $block:block) => {
if let $pat = $expr {
$block
}
};
([$expr:expr, $($tt:tt)+], $block:block) => {
if $expr {
if_let_chain!{ [$($tt)+], $block }
}
};
([$expr:expr], $block:block) => {
if $expr {
$block
}
};
}
pub struct LimitStack { pub struct LimitStack {
stack: Vec<u64>, stack: Vec<u64>,
} }