NST_MARK2        2784 regcomp.c            SET_ENCLOSE_STATUS(node, NST_MARK2);
NST_MARK2        2786 regcomp.c            CLEAR_ENCLOSE_STATUS(node, NST_MARK2);
NST_MARK2        2894 regcomp.c            SET_ENCLOSE_STATUS(node, NST_MARK2);
NST_MARK2        2896 regcomp.c            CLEAR_ENCLOSE_STATUS(node, NST_MARK2);
NST_MARK2         142 regparse.h     #define IS_ENCLOSE_MARK2(en)           (((en)->state & NST_MARK2)         != 0)