Macro zkevm_circuits::require_parser

macro_rules! require_parser {
    {
        $cb:expr,
        lhs = ($($lhs:tt)*)
        rest = (== $($rhs:tt)*)
    } => { ... };
    {
        $cb:expr,
        lhs = ($($lhs:tt)*)
        rest = ($next:tt $($rest:tt)*)
    } => { ... };
}

require_parser