prevback          205 ext/ereg/regex/regcomp.c 	register sopno prevback = 0;
prevback          223 ext/ereg/regex/regcomp.c 			prevback = conc;
prevback          226 ext/ereg/regex/regcomp.c 		ASTERN(OOR1, prevback);
prevback          227 ext/ereg/regex/regcomp.c 		prevback = THERE();
prevback          235 ext/ereg/regex/regcomp.c 		ASTERN(O_CH, prevback);