Enum DispatchError

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pub enum DispatchError {
    ActionCommand {
        command_name: String,
        source: Box<dyn Error>,
    },
    SubcommandNotInMap {
        command_name: String,
        all_commands: Vec<&'static str>,
    },
    NoSubcommand,
}
Expand description

Error generated by CommandMap::dispatch.

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ActionCommand

An error originating from the execution of the ActionCommand itself - an error in the business logic.

Fields

§command_name: String
§source: Box<dyn Error>
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SubcommandNotInMap

The CommandMap does not have an associated ActionCommand named the same thing as the clap::ArgMatches matched command. This may happen if additional clap::Commands have been added beyond those present in the CommandMap.

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§command_name: String
§all_commands: Vec<&'static str>
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NoSubcommand

The clap::ArgMatches does not have a subcommand, which means that the clap::Command which matched this clap::ArgMatches is the most specific. For example, if my-program has a hello-world subcommand, but the CommandMap returns DispatchError::NoSubcommand, it means that the program was invoked as my-program with no subcommand at all.

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impl Debug for DispatchError

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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 DispatchError

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

Formats the value using the given formatter. Read more
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impl Error for DispatchError
where Self: Debug + Display,

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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 cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
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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 ErrorCompat for DispatchError

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fn backtrace(&self) -> Option<&Backtrace>

Returns a Backtrace that may be printed.
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fn iter_chain(&self) -> ChainCompat<'_>
where Self: AsErrorSource,

Returns an iterator for traversing the chain of errors, starting with the current error and continuing with recursive calls to Error::source. Read more

Auto Trait Implementations§

Blanket Implementations§

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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> AsErrorSource for T
where T: Error + 'static,

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fn as_error_source(&self) -> &(dyn Error + 'static)

For maximum effectiveness, this needs to be called as a method to benefit from Rust’s automatic dereferencing of method receivers.
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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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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.