rb_enc_isctype   3617 string.c           if (rb_enc_isctype(c, ONIGENC_CTYPE_DIGIT, enc))
rb_enc_isctype   3619 string.c           else if (rb_enc_isctype(c, ONIGENC_CTYPE_ALPHA, enc))
rb_enc_isctype   3629 string.c       	    if (rb_enc_isctype(c, ctype, enc))
rb_enc_isctype   3640 string.c                   if (!rb_enc_isctype(c, ctype, enc)) {