NST_MARK1        2835 regcomp.c      	SET_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        2838 regcomp.c      	CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        2958 regcomp.c      	  SET_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        2961 regcomp.c      	  CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1         141 regparse.h     #define IS_ENCLOSE_MARK1(en)           (((en)->state & NST_MARK1)         != 0)