// codesnip-guard: mlambda
#[cfg_attr(any(),rustfmt::skip)]mod mlambda{#[doc=" Macro that define closure like macro. Unlike closure, this macro localizes variable capture."]#[doc=""]#[doc=" # Example"]#[doc=" ```"]#[doc=" # use competitive::mlambda;"]#[doc=" let graph: Vec<Vec<usize>> = vec![vec![1, 2], vec![2], vec![]];"]#[doc=" let mut deq = std::collections::VecDeque::new();"]#[doc=" let mut dist: Vec<usize> = vec![!0; 3];"]#[doc=" mlambda!("]#[doc="     fn push(v: usize, cost: usize) {"]#[doc="         if dist[v] > cost {"]#[doc="             dist[v] = cost;"]#[doc="             deq.push_back(v);"]#[doc="         }"]#[doc="     }"]#[doc=" );"]#[doc=" push!(0, 0);"]#[doc=" while let Some(v) = deq.pop_front() {"]#[doc="     for &to in &graph[v] {"]#[doc="         push!(to, dist[v] + 1);"]#[doc="     }"]#[doc=" }"]#[doc=" assert_eq!(vec![0, 1, 1], dist);"]#[doc=" ```"]#[macro_export]macro_rules!mlambda{(@def($dol:tt)[$([$x:ident])*][$([$y:ident,$($z:tt)*])*]fn$name:ident($($args:tt)*)->$ret:ty$body:block)=>{macro_rules!$name{($($dol$x:expr),*$dol(,)?)=>{{$(let$y$($z)* =$dol$y;)*$body}}}};(@pre()[$($x:tt)*][$($y:tt)*]fn$name:ident($($args:tt)*)->$ret:ty$body:block)=>{$crate::mlambda!(@def($)[$($x)*][$($y)*]fn$name($($args)*)->$ret$body)};(@pre()[$($x:tt)*][$($y:tt)*]fn$name:ident($($args:tt)*)$body:block)=>{$crate::mlambda!(@pre()[$($x)*][$($y)*]fn$name($($args)*)->()$body)};(@pre($arg:ident$(:$ty:ty)?)[$($x:tt)*][$($y:tt)*]$($rest:tt)*)=>{$crate::mlambda!(@pre()[$($x)*[$arg]][$($y)*[$arg,$(:$ty)?]]$($rest)*)};(@pre($arg:ident$(:$ty:ty)?,$($args:tt)*)[$($x:tt)*][$($y:tt)*]$($rest:tt)*)=>{$crate::mlambda!(@pre($($args)*)[$($x)*[$arg]][$($y)*[$arg,$(:$ty)?]]$($rest)*)};(fn$name:ident($($args:tt)*)$($rest:tt)*)=>{$crate::mlambda!(@pre($($args)*)[][]fn$name($($args)*)$($rest)*)};}}