| /// True values are `y`, `yes`, `t`, `true`, `on`, and `1`. |
| pub(crate) const TRUE_LITERALS: [&str; 6] = ["y", "yes", "t", "true", "on", "1"]; |
| |
| /// False values are `n`, `no`, `f`, `false`, `off`, and `0`. |
| pub(crate) const FALSE_LITERALS: [&str; 6] = ["n", "no", "f", "false", "off", "0"]; |
| |
| /// Converts a string literal representation of truth to true or false. |
| /// |
| /// `false` values are `n`, `no`, `f`, `false`, `off`, and `0` (case insensitive). |
| /// |
| /// Any other value will be considered as `true`. |
| pub(crate) fn str_to_bool(val: impl AsRef<str>) -> Option<bool> { |
| let pat: &str = &val.as_ref().to_lowercase(); |
| if TRUE_LITERALS.contains(&pat) { |
| Some(true) |
| } else if FALSE_LITERALS.contains(&pat) { |
| Some(false) |
| } else { |
| None |
| } |
| } |
