Created
June 22, 2015 18:47
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#![allow(dead_code)] | |
macro_rules! pipe { | |
((); $e:expr; $($args:tt)*) => ($e); | |
(($m:ident | $($ms:ident)|+) ; $($args:tt)*) => ($m!(($($ms)|+) ; $($args)*)); | |
(($m:ident) ; $($args:tt)*) => ($m!((); $($args)*)); | |
($($ms:ident)|*) => (pipe!(($($ms)|*);)); | |
} | |
macro_rules! incr { | |
(($($ms:ident)|*) ; $($args:tt)*) => (pipe!(($($ms)|*) ; () $($args)*)); | |
} | |
macro_rules! decr { | |
(($($ms:ident)|*) ; () $($args:tt)*) => (pipe!(($($ms)|*) ; $($args)*)); | |
} | |
macro_rules! zero { | |
(($($ms:ident)|*) ; $($args:tt)*) => (pipe!(($($ms)|*) ; ; $($args)*)); | |
} | |
macro_rules! one { | |
(($($ms:ident)|*) ; $($args:tt)*) => (zero!((incr $(| $ms)*) ; $($args)*)); | |
} | |
macro_rules! double { | |
(($($ms:ident)|*) ; () $($n:tt)*) => (double!((incr | incr $(| $ms)*) ; $($n)*)); | |
(($($ms:ident)|*) ; ; $($rest:tt)*) => (zero!(($($ms)|*) ; $($rest)*)); | |
} | |
macro_rules! thirty_one { | |
(($($ms:ident)|*) ; $($args:tt)*) => (pipe!(($($ms)|*) ; ()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()() ; $($args)*)); | |
} | |
macro_rules! range_rec { | |
(($($ms:ident)|*) ; $n:expr ; [$($ns:expr),*] ; () $($args:tt)*) => (range_rec!(($($ms)|*) ; $n + 1 ; [$($ns,)* $n] ; $($args)*)); | |
(($($ms:ident)|*) ; $n:expr ; [$($ns:expr),*] ; ; $($args:tt)*) => (pipe!(($($ms)|*) ; [$($ns),*] ; $($args)*)); | |
} | |
macro_rules! range_decr { | |
(($($ms:ident)|*) ; $n:expr ; []; () $($args:tt)*) => (pipe!(($($ms)|*) ; $n ; []; $($args)*)); | |
} | |
macro_rules! range_lead { | |
(($($ms:ident)|*) ; $n:expr ; () $($args:tt)*) => (range_lead!((range_decr $(| $ms)*) ; $n + 1 ; $($args)*)); | |
(($($ms:ident)|*) ; $n:expr ; ; $($args:tt)*) => (pipe!(($($ms)|*) ; $n ; [] ; $($args)*)); | |
} | |
macro_rules! range { | |
(($($ms:ident)|*) ; $($args:tt)*) => (range_lead!((range_rec $(| $ms)*) ; 0 ; $($args)*)); | |
} | |
macro_rules! map_rule_repr { | |
($x: expr) => (95.52 / (8128.0 / ($x as f32) + 100.0)); | |
} | |
macro_rules! map_rule { | |
(($($ms:ident)|*) ; $($args:tt)*) => (pipe!(($($ms)|*) ; map_rule_repr ; $($args)*)); | |
} | |
macro_rules! map { | |
(($($ms:ident)|*) ; $f:ident ; [$($ns:expr),*] ; $($args:tt)*) => (pipe!(($($ms)|*) ; [$($f!($ns)),*] ; $($args)*)); | |
} | |
fn main() { | |
println!("{:?}", pipe!(thirty_one | zero | range | map_rule | map)); | |
} |
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