813 byteidx(typval_T *argvars, typval_T *rettv, int comp UNUSED)  in byteidx()  argument
822 	    && (check_for_string_arg(argvars, 0) == FAIL  in byteidx()
823 		|| check_for_number_arg(argvars, 1) == FAIL))  in byteidx()
826     str = tv_get_string_chk(&argvars[0]);  in byteidx()
827     idx = tv_get_number_chk(&argvars[1], NULL);  in byteidx()
848 f_byteidx(typval_T *argvars, typval_T *rettv)  in f_byteidx()  argument
850     byteidx(argvars, rettv, FALSE);  in f_byteidx()
857 f_byteidxcomp(typval_T *argvars, typval_T *rettv)  in f_byteidxcomp()  argument
859     byteidx(argvars, rettv, TRUE);  in f_byteidxcomp()
866 f_charidx(typval_T *argvars, typval_T *rettv)  in f_charidx()  argument
878 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_charidx()
879 		|| check_for_number_arg(argvars, 1) == FAIL  in f_charidx()
880 		|| check_for_opt_bool_arg(argvars, 2) == FAIL))  in f_charidx()
883     if (argvars[0].v_type != VAR_STRING || argvars[1].v_type != VAR_NUMBER  in f_charidx()
884 	    || (argvars[2].v_type != VAR_UNKNOWN  in f_charidx()
885 					   && argvars[2].v_type != VAR_NUMBER  in f_charidx()
886 					   && argvars[2].v_type != VAR_BOOL))  in f_charidx()
892     str = tv_get_string_chk(&argvars[0]);  in f_charidx()
893     idx = tv_get_number_chk(&argvars[1], NULL);  in f_charidx()
897     if (argvars[2].v_type != VAR_UNKNOWN)  in f_charidx()
898 	countcc = tv_get_bool(&argvars[2]);  in f_charidx()
924 f_str2list(typval_T *argvars, typval_T *rettv)  in f_str2list()  argument
933 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_str2list()
934 		|| check_for_opt_bool_arg(argvars, 1) == FAIL))  in f_str2list()
937     if (argvars[1].v_type != VAR_UNKNOWN)  in f_str2list()
938 	utf8 = (int)tv_get_bool_chk(&argvars[1], NULL);  in f_str2list()
940     p = tv_get_string(&argvars[0]);  in f_str2list()
970 f_str2nr(typval_T *argvars, typval_T *rettv)  in f_str2nr()  argument
979 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_str2nr()
980 		|| check_for_opt_number_arg(argvars, 1) == FAIL  in f_str2nr()
981 		|| (argvars[1].v_type != VAR_UNKNOWN  in f_str2nr()
982 		    && check_for_opt_bool_arg(argvars, 2) == FAIL)))  in f_str2nr()
985     if (argvars[1].v_type != VAR_UNKNOWN)  in f_str2nr()
987 	base = (int)tv_get_number(&argvars[1]);  in f_str2nr()
993 	if (argvars[2].v_type != VAR_UNKNOWN && tv_get_bool(&argvars[2]))  in f_str2nr()
997     p = skipwhite(tv_get_string_strict(&argvars[0]));  in f_str2nr()
1020 f_strgetchar(typval_T *argvars, typval_T *rettv)  in f_strgetchar()  argument
1031 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strgetchar()
1032 		|| check_for_number_arg(argvars, 1) == FAIL))  in f_strgetchar()
1035     str = tv_get_string_chk(&argvars[0]);  in f_strgetchar()
1039     charidx = (int)tv_get_number_chk(&argvars[1], &error);  in f_strgetchar()
1059 f_stridx(typval_T *argvars, typval_T *rettv)  in f_stridx()  argument
1069 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_stridx()
1070 		|| check_for_string_arg(argvars, 1) == FAIL  in f_stridx()
1071 		|| check_for_opt_number_arg(argvars, 2) == FAIL))  in f_stridx()
1074     needle = tv_get_string_chk(&argvars[1]);  in f_stridx()
1075     save_haystack = haystack = tv_get_string_buf_chk(&argvars[0], buf);  in f_stridx()
1080     if (argvars[2].v_type != VAR_UNKNOWN)  in f_stridx()
1084 	start_idx = (int)tv_get_number_chk(&argvars[2], &error);  in f_stridx()
1100 f_string(typval_T *argvars, typval_T *rettv)  in f_string()  argument
1106     rettv->vval.v_string = tv2string(&argvars[0], &tofree, numbuf,  in f_string()
1117 f_strlen(typval_T *argvars, typval_T *rettv)  in f_strlen()  argument
1120 	    && check_for_string_or_number_arg(argvars, 0) == FAIL)  in f_strlen()
1124 					      tv_get_string(&argvars[0])));  in f_strlen()
1128 strchar_common(typval_T *argvars, typval_T *rettv, int skipcc)  in strchar_common()  argument
1130     char_u		*s = tv_get_string(&argvars[0]);  in strchar_common()
1147 f_strcharlen(typval_T *argvars, typval_T *rettv)  in f_strcharlen()  argument
1150 	    && check_for_string_or_number_arg(argvars, 0) == FAIL)  in f_strcharlen()
1153     strchar_common(argvars, rettv, TRUE);  in f_strcharlen()
1160 f_strchars(typval_T *argvars, typval_T *rettv)  in f_strchars()  argument
1165 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strchars()
1166 		|| check_for_opt_bool_arg(argvars, 1) == FAIL))  in f_strchars()
1169     if (argvars[1].v_type != VAR_UNKNOWN)  in f_strchars()
1170 	skipcc = tv_get_bool(&argvars[1]);  in f_strchars()
1174 	strchar_common(argvars, rettv, skipcc);  in f_strchars()
1181 f_strdisplaywidth(typval_T *argvars, typval_T *rettv)  in f_strdisplaywidth()  argument
1189 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strdisplaywidth()
1190 		|| check_for_opt_number_arg(argvars, 1) == FAIL))  in f_strdisplaywidth()
1193     s = tv_get_string(&argvars[0]);  in f_strdisplaywidth()
1194     if (argvars[1].v_type != VAR_UNKNOWN)  in f_strdisplaywidth()
1195 	col = (int)tv_get_number(&argvars[1]);  in f_strdisplaywidth()
1204 f_strwidth(typval_T *argvars, typval_T *rettv)  in f_strwidth()  argument
1208     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)  in f_strwidth()
1211     s = tv_get_string_strict(&argvars[0]);  in f_strwidth()
1219 f_strcharpart(typval_T *argvars, typval_T *rettv)  in f_strcharpart()  argument
1231 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strcharpart()
1232 		|| check_for_number_arg(argvars, 1) == FAIL  in f_strcharpart()
1233 		|| check_for_opt_number_arg(argvars, 2) == FAIL  in f_strcharpart()
1234 		|| (argvars[2].v_type != VAR_UNKNOWN  in f_strcharpart()
1235 		    && check_for_opt_bool_arg(argvars, 3) == FAIL)))  in f_strcharpart()
1238     p = tv_get_string(&argvars[0]);  in f_strcharpart()
1241     nchar = (int)tv_get_number_chk(&argvars[1], &error);  in f_strcharpart()
1244 	if (argvars[2].v_type != VAR_UNKNOWN  in f_strcharpart()
1245 					   && argvars[3].v_type != VAR_UNKNOWN)  in f_strcharpart()
1247 	    skipcc = tv_get_bool(&argvars[3]);  in f_strcharpart()
1266 	if (argvars[2].v_type != VAR_UNKNOWN)  in f_strcharpart()
1268 	    charlen = (int)tv_get_number(&argvars[2]);  in f_strcharpart()
1311 f_strpart(typval_T *argvars, typval_T *rettv)  in f_strpart()  argument
1320 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strpart()
1321 		|| check_for_number_arg(argvars, 1) == FAIL  in f_strpart()
1322 		|| check_for_opt_number_arg(argvars, 2) == FAIL  in f_strpart()
1323 		|| (argvars[2].v_type != VAR_UNKNOWN  in f_strpart()
1324 		    && check_for_opt_bool_arg(argvars, 3) == FAIL)))  in f_strpart()
1327     p = tv_get_string(&argvars[0]);  in f_strpart()
1330     n = (int)tv_get_number_chk(&argvars[1], &error);  in f_strpart()
1333     else if (argvars[2].v_type != VAR_UNKNOWN)  in f_strpart()
1334 	len = (int)tv_get_number(&argvars[2]);  in f_strpart()
1352     if (argvars[2].v_type != VAR_UNKNOWN && argvars[3].v_type != VAR_UNKNOWN)  in f_strpart()
1370 f_strridx(typval_T *argvars, typval_T *rettv)  in f_strridx()  argument
1380 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_strridx()
1381 		|| check_for_string_arg(argvars, 1) == FAIL  in f_strridx()
1382 		|| check_for_opt_number_arg(argvars, 2) == FAIL))  in f_strridx()
1385     needle = tv_get_string_chk(&argvars[1]);  in f_strridx()
1386     haystack = tv_get_string_buf_chk(&argvars[0], buf);  in f_strridx()
1393     if (argvars[2].v_type != VAR_UNKNOWN)  in f_strridx()
1396 	end_idx = (int)tv_get_number_chk(&argvars[2], NULL);  in f_strridx()
1429 f_strtrans(typval_T *argvars, typval_T *rettv)  in f_strtrans()  argument
1431     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)  in f_strtrans()
1435     rettv->vval.v_string = transstr(tv_get_string(&argvars[0]));  in f_strtrans()
1442 f_tolower(typval_T *argvars, typval_T *rettv)  in f_tolower()  argument
1444     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)  in f_tolower()
1448     rettv->vval.v_string = strlow_save(tv_get_string(&argvars[0]));  in f_tolower()
1455 f_toupper(typval_T *argvars, typval_T *rettv)  in f_toupper()  argument
1457     if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)  in f_toupper()
1461     rettv->vval.v_string = strup_save(tv_get_string(&argvars[0]));  in f_toupper()
1468 f_tr(typval_T *argvars, typval_T *rettv)  in f_tr()  argument
1486 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_tr()
1487 		|| check_for_string_arg(argvars, 1) == FAIL  in f_tr()
1488 		|| check_for_string_arg(argvars, 2) == FAIL))  in f_tr()
1491     in_str = tv_get_string(&argvars[0]);  in f_tr()
1492     fromstr = tv_get_string_buf_chk(&argvars[1], buf);  in f_tr()
1493     tostr = tv_get_string_buf_chk(&argvars[2], buf2);  in f_tr()
1587 f_trim(typval_T *argvars, typval_T *rettv)  in f_trim()  argument
1603 	    && (check_for_string_arg(argvars, 0) == FAIL  in f_trim()
1604 		|| check_for_opt_string_arg(argvars, 1) == FAIL  in f_trim()
1605 		|| (argvars[1].v_type != VAR_UNKNOWN  in f_trim()
1606 		    && check_for_opt_number_arg(argvars, 2) == FAIL)))  in f_trim()
1609     head = tv_get_string_buf_chk(&argvars[0], buf1);  in f_trim()
1613     if (argvars[1].v_type != VAR_UNKNOWN && argvars[1].v_type != VAR_STRING)  in f_trim()
1615 	semsg(_(e_invarg2), tv_get_string(&argvars[1]));  in f_trim()
1619     if (argvars[1].v_type == VAR_STRING)  in f_trim()
1621 	mask = tv_get_string_buf_chk(&argvars[1], buf2);  in f_trim()
1623 	if (argvars[2].v_type != VAR_UNKNOWN)  in f_trim()
1628 	    dir = (int)tv_get_number_chk(&argvars[2], &error);  in f_trim()
1633 		semsg(_(e_invarg2), tv_get_string(&argvars[2]));  in f_trim()