Enum ArgParseError 

pub enum ArgParseError {
    UnknownArgument(String),
    MissingValueForOption(String),
    OptionInMiddleOfGroup(String),
    HelpRequested,
    MissingRequiredArgument(String),
}

Represents all possible errors that can occur during parsing.

Variants

UnknownArgument(String)

An unknown argument was provided (e.g., --foo).

MissingValueForOption(String)

An option was provided without its required value (e.g., --output).

OptionInMiddleOfGroup(String)

An option was incorrectly placed in a group of short flags (e.g., -ovf).

HelpRequested

The user requested the help message (e.g., --help).

MissingRequiredArgument(String)

A required argument was not provided.

Trait Implementations

impl Debug for ArgParseError

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

Formats the value using the given formatter.

impl Display for ArgParseError

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

Formats the value using the given formatter.

impl PartialEq for ArgParseError

fn eq(&self, other: &ArgParseError) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for ArgParseError