Enum OptionError

pub enum OptionError {
    Unknown,
    MissingParameter,
    UnexpectedParameter,
    InvalidUnicode,
    InvalidValue(Box<dyn Error>),
}

An error for an invalid named argument.

Variants

Unknown

The named argument is unrecognized.

For example, the user passed --xyz to the program, but there is no option named "xyz".

MissingParameter

The named argument requires a parameter, but no parameter was supplied.

For example, the program accepts --output=<file>, but an argument was passed as --output with no parameter.

UnexpectedParameter

The named argument does not accept a parameter, but one was supplied.

For example, the program accepts --verbose, but an argument was passed as --verbose=3.

InvalidUnicode

The named argument was passed a value which is not valid unicode.

InvalidValue(Box<dyn Error>)

The value for the named argument was invalid.

For example, the program accepts --jobs=<N> with integer N, but the user passed in --jobs=xyz.

Trait Implementations

impl Debug for OptionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> From<T> for OptionError

where T: Error + 'static,

fn from(x: T) -> OptionError

Converts to this type from the input type.