Enum parse_arg::ValueError

pub enum ValueError<E> {
    InvalidValue(E),
    MissingValue,
}

Error that can occur durin parsing command-line argument.

Variants

InvalidValue(E)

The value couldn’t be parsed because of the invalid format.

MissingValue

The value to the argument is missing - too few arguments.

Implementations

impl<E> ValueError<E>

pub fn map_or<R, F: FnOnce(E) -> R>(self, default: R, f: F) -> R

Applies function to the contained error (if any), or returns the provided default (if not).

This is practically the same thing what Option<E> would do.

Trait Implementations

impl<E: Clone> Clone for ValueError<E>

fn clone(&self) -> ValueError<E>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<E: Debug> Debug for ValueError<E>

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

Formats the value using the given formatter.

impl<E: PartialEq> PartialEq<ValueError<E>> for ValueError<E>

fn eq(&self, other: &ValueError<E>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<E: Copy> Copy for ValueError<E>

impl<E: Eq> Eq for ValueError<E>

impl<E> StructuralEq for ValueError<E>

impl<E> StructuralPartialEq for ValueError<E>