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rust snippets
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// https://maguro.dev/debug-macro/ | |
macro_rules! debug { | |
($($a:expr),* $(,)*) => { | |
#[cfg(debug_assertions)] | |
eprintln!(concat!($("| ", stringify!($a), "={:?} "),*, "|"), $(&$a),*); | |
}; | |
} | |
// https://kuretchi.hateblo.jp/entry/rust_nested_vec | |
macro_rules! nested_vec { | |
($e:expr; $n:expr) => { | |
vec![$e; $n] | |
}; | |
($e:expr; $n:expr $(; $m:expr)+) => { | |
vec![nested_vec!($e $(; $m)+); $n] | |
}; | |
} | |
// https://maguro.dev/chmin-chmax-macro/ | |
#[macro_export] | |
macro_rules! chmin { | |
($base:expr, $($cmps:expr),+ $(,)*) => {{ | |
let cmp_min = min!($($cmps),+); | |
if $base > cmp_min { | |
$base = cmp_min; | |
true | |
} else { | |
false | |
} | |
}}; | |
} | |
#[macro_export] | |
macro_rules! chmax { | |
($base:expr, $($cmps:expr),+ $(,)*) => {{ | |
let cmp_max = max!($($cmps),+); | |
if $base < cmp_max { | |
$base = cmp_max; | |
true | |
} else { | |
false | |
} | |
}}; | |
} | |
#[macro_export] | |
macro_rules! min { | |
($a:expr $(,)*) => {{ | |
$a | |
}}; | |
($a:expr, $b:expr $(,)*) => {{ | |
std::cmp::min($a, $b) | |
}}; | |
($a:expr, $($rest:expr),+ $(,)*) => {{ | |
std::cmp::min($a, min!($($rest),+)) | |
}}; | |
} | |
#[macro_export] | |
macro_rules! max { | |
($a:expr $(,)*) => {{ | |
$a | |
}}; | |
($a:expr, $b:expr $(,)*) => {{ | |
std::cmp::max($a, $b) | |
}}; | |
($a:expr, $($rest:expr),+ $(,)*) => {{ | |
std::cmp::max($a, max!($($rest),+)) | |
}}; | |
} |
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