Enum clap::error::ContextKind

source · [−]

#[non_exhaustive]
pub enum ContextKind {
Show 15 variants    InvalidSubcommand,
    InvalidArg,
    PriorArg,
    ValidValue,
    InvalidValue,
    ActualNumValues,
    ExpectedNumValues,
    MinValues,
    SuggestedCommand,
    SuggestedSubcommand,
    SuggestedArg,
    SuggestedValue,
    TrailingArg,
    Usage,
    Custom,
}

Expand description

Semantics for a piece of error information

Variants (Non-exhaustive)

This enum is marked as non-exhaustive

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

`InvalidSubcommand`

The cause of the error

`InvalidArg`

The cause of the error

`PriorArg`

Existing arguments

`ValidValue`

Accepted values

`InvalidValue`

Rejected values

`ActualNumValues`

Number of values present

`ExpectedNumValues`

Number of allowed values

`MinValues`

Minimum number of allowed values

`SuggestedCommand`

Potential fix for the user

`SuggestedSubcommand`

Potential fix for the user

`SuggestedArg`

Potential fix for the user

`SuggestedValue`

Potential fix for the user

`TrailingArg`

Trailing argument

`Usage`

A usage string

`Custom`

An opaque message to the user

Implementations

impl ContextKind

pub fn as_str(self) -> Option<&'static str>

End-user description of the error case, where relevant

Trait Implementations

impl Clone for ContextKind

fn clone(&self) -> ContextKind

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for ContextKind

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

Formats the value using the given formatter. Read more

impl Display for ContextKind

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

Formats the value using the given formatter. Read more

impl Hash for ContextKind

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher. Read more

1.3.0 · source

fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,

Feeds a slice of this type into the given Hasher. Read more

impl PartialEq<ContextKind> for ContextKind

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

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

1.0.0 · source

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

This method tests for !=.

impl Copy for ContextKind

impl Eq for ContextKind

impl StructuralEq for ContextKind

impl StructuralPartialEq for ContextKind

Auto Trait Implementations

impl RefUnwindSafe for ContextKind

impl Send for ContextKind

impl Sync for ContextKind

impl Unpin for ContextKind

impl UnwindSafe for ContextKind

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T where
T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.