pub fn check_valid_string_optional(s: Option<&str>, param: &str) -> Result<()>
Expand description
Checks the string s
if Some, contains only ASCII characters and has semantic meaning.
ยงErrors
This function returns an error:
- If
s
is an empty string. - If
s
consists solely of whitespace characters. - If
s
contains one or more non-ASCII characters.