Function parse_option

cranelift/reader/src/isaspec.rs:107–136

Parse an single command line options and apply it to `config`.

(
    opt: &str,
    config: &mut dyn Configurable,
    loc: Location,
)

/// Parse an single command line options and apply it to `config`.
pub fn parse_option(
    opt: &str,
    config: &mut dyn Configurable,
    loc: Location,
) -> Result<(), ParseOptionError> {
    match TestOption::new(opt) {
        TestOption::Flag(name) => match config.enable(name) {
            Ok(_) => Ok(()),
            Err(SetError::BadName(name)) => Err(ParseOptionError::UnknownFlag { loc, name }),
            Err(_) => option_err!(loc, "not a boolean flag: '{}'", opt),
        },
        TestOption::Value(name, value) => match config.set(name, value) {
            Ok(_) => Ok(()),
            Err(SetError::BadName(name)) => Err(ParseOptionError::UnknownValue {
                loc,
                name,
                value: value.to_string(),
            }),
            Err(SetError::BadType) => option_err!(loc, "invalid setting type: '{}'", opt),
            Err(SetError::BadValue(expected)) => {
                option_err!(
                    loc,
                    "invalid setting value for '{}', expected {}",
                    opt,
                    expected
                )
            }
        },
    }
}