pub fn to_integral<T>(str_: &str) -> Option<T>Expand description
| Convert string to integral type T. Leading
| whitespace, a leading +, or any trailing
| character fail the parsing.
|
| The required format expressed as regex
| is -?[0-9]+. The minus sign is only
| permitted for signed integer types.
|
| ———–
| @return
|
| std::nullopt if the entire string could
| not be parsed, or if the parsed value
| is not in the range representable by
| the type T.
|