// > and will match according to the previous rules.
            const unescaped = p2.replace(/\\\*/g, '[^\\/]*')
            return p1 + unescaped
        }
    ],

    [
        // unescape, revert step 3 except for back slash
        // For example, if a user escape a '\\*',
        // after step 3, the result will be '\\\\\\*'
        /\\\\\\(?=[$.|*+(){^])/g,
        () => ESCAPE
    ],

    [