Constant onig::SYNTAX_OPERATOR_ATMARK_CAPTURE_HISTORY

pub const SYNTAX_OPERATOR_ATMARK_CAPTURE_HISTORY: SyntaxOperator = SyntaxOperator{bits:
                   onig_sys::ONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY as u64 <<
                       32,}

(?@..),(?@<x>..)