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Macro impl_recorder

source 
macro_rules! impl_recorder {
    ($type_name:ident; $($name:ident => $val:expr),*) => { ... };
    ($vis:vis struct $type_name:ident; $($name:ident => $val:expr),*) => { ... };
    (impl identifier, $name:literal) => { ... };
    (impl before_search, $br:expr) => { ... };
    (impl after_search, $br:expr) => { ... };
    (impl before_rewrite, $br:expr) => { ... };
    (impl after_rewrite, $br:expr) => { ... };
}