NST_MARK1        2983 regcomp.c      	SET_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        2986 regcomp.c      	CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        3106 regcomp.c      	  SET_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1        3109 regcomp.c      	  CLEAR_ENCLOSE_STATUS(node, NST_MARK1);
NST_MARK1         149 regparse.h     #define IS_ENCLOSE_MARK1(en)           (((en)->state & NST_MARK1)         != 0)