Struct clap::Error

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pub struct Error {
    pub message: String,
    pub kind: ErrorKind,
    pub info: Option<Vec<String>>,
}
Expand description

Command Line Argument Parser Error

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§message: String

Formatted error message

§kind: ErrorKind

The type of error

§info: Option<Vec<String>>

Any additional information passed along, such as the argument name that caused the error

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impl Error

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pub fn use_stderr(&self) -> bool

Should the message be written to stdout or not

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pub fn exit(&self) -> !

Prints the error message and exits. If Error::use_stderr evaluates to true, the message will be written to stderr and exits with a status of 1. Otherwise, stdout is used with a status of 0.

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pub fn with_description(description: &str, kind: ErrorKind) -> Self

Create an error with a custom description.

This can be used in combination with Error::exit to exit your program with a custom error message.

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impl Debug for Error

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

Formats the value using the given formatter. Read more
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impl Display for Error

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

Formats the value using the given formatter. Read more
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impl Error for Error

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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
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fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any. Read more
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type based access to context intended for error reports. Read more
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impl From<Error> for Error

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fn from(e: Error) -> Self

Converts to this type from the input type.
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impl From<Error> for Error

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fn from(e: Error) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

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impl RefUnwindSafe for Error

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impl Send for Error

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impl Sync for Error

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impl Unpin for Error

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impl UnwindSafe for Error

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.