patch 8.2.2897: Vim9: can use reserved words at the script level
Problem: Vim9: can use reserved words at the script level.
Solution: Check variable names for reserved words. (closes #8253)
diff --git a/src/vim9script.c b/src/vim9script.c
index 02c04e2..fbb815c 100644
--- a/src/vim9script.c
+++ b/src/vim9script.c
@@ -709,10 +709,10 @@
}
name = vim_strnsave(arg, p - arg);
- // parse type
+ // parse type, check for reserved name
p = skipwhite(p + 1);
type = parse_type(&p, &si->sn_type_list, TRUE);
- if (type == NULL)
+ if (type == NULL || check_reserved_name(name) == FAIL)
{
vim_free(name);
return p;
@@ -974,4 +974,26 @@
return OK; // not really
}
+// words that cannot be used as a variable
+static char *reserved[] = {
+ "true",
+ "false",
+ "null",
+ NULL
+};
+
+ int
+check_reserved_name(char_u *name)
+{
+ int idx;
+
+ for (idx = 0; reserved[idx] != NULL; ++idx)
+ if (STRCMP(reserved[idx], name) == 0)
+ {
+ semsg(_(e_cannot_use_reserved_name), name);
+ return FAIL;
+ }
+ return OK;
+}
+
#endif // FEAT_EVAL