#[non_exhaustive]pub enum MatchesError {
Downcast {
actual: AnyValueId,
expected: AnyValueId,
},
UnknownArgument {},
}
Expand description
Violation of ArgMatches
assumptions
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.
Downcast
Failed to downcast AnyValue
to the specified type
Fields
This variant is marked as non-exhaustive
Non-exhaustive enum variants could have additional fields added in future. Therefore, non-exhaustive enum variants cannot be constructed in external crates and cannot be matched against.
§
actual: AnyValueId
Type for value stored in ArgMatches
§
expected: AnyValueId
The target type to downcast to
UnknownArgument
Argument not defined in Command
Trait Implementations§
Source§impl Clone for MatchesError
impl Clone for MatchesError
Source§fn clone(&self) -> MatchesError
fn clone(&self) -> MatchesError
Returns a copy of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreSource§impl Debug for MatchesError
impl Debug for MatchesError
Source§impl Display for MatchesError
impl Display for MatchesError
Source§impl Error for MatchesError
impl Error for MatchesError
1.30.0 · Source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§fn description(&self) -> &str
fn description(&self) -> &str
👎Deprecated since 1.42.0: use the Display impl or to_string()
Auto Trait Implementations§
impl Freeze for MatchesError
impl RefUnwindSafe for MatchesError
impl Send for MatchesError
impl Sync for MatchesError
impl Unpin for MatchesError
impl UnwindSafe for MatchesError
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 64 bytes
Size for each variant:
Downcast
: 64 bytesUnknownArgument
: 0 bytes