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NumError

Enum NumError

#[non_exhaustive]pub enum NumError {
    NotImplemented,
    NotSupported,
    Unspecified,
    Invalid,
    NoInverse,
    MismatchedSizes,
    IncompatibleBounds,
    NonNegativeRequired,
    PositiveRequired,
    NonZeroRequired,
    Overflow(Option<Sign>),
}

Expand description

⅀ 🚩+ A numeric-related error.

^{📍 num::NumError}

^{📦 size_of::<NumError>() == 1 bytes / 8 bits} ^{⚗️Option<T> 🟰 T}

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.

NotImplemented

The requested numerical functionality is not implemented.

This is the default implementation of every numeric trait method.

NotSupported

The requested numerical functionality is not supported.

Unspecified

Unspecified error.

When no clearer error can be given.

Invalid

An invalid value was received for the given type or operation.

NoInverse

An inverse doesn’t exist.

MismatchedSizes

The provided values are not compatible in size.

IncompatibleBounds

The given bounds are not compatible.

NonNegativeRequired

A non-negative value is required.

PositiveRequired

A positive value is required.

NonZeroRequired

A non-zero value is required.

Overflow(Option<Sign>)

An arithmetic overflow error, with an optional associated sign.

Trait Implementations§

impl Clone for NumError

fn clone(&self) -> NumError

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Copy for NumError

impl Debug for NumError

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

Formats the value using the given formatter. Read more

impl Display for NumError

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

Formats the value using the given formatter. Read more

impl Eq for NumError

impl Error for NumError

1.30.0 · Source§

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 ⓘ

👎Deprecated since 1.42.0:

use the Display impl or to_string()

1.0.0 · Source§

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

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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

impl Hash for NumError

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, Self: Sized,

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

impl PartialEq for NumError

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl StructuralPartialEq for NumError

Auto Trait Implementations§

impl Freeze for NumError

impl RefUnwindSafe for NumError

impl Send for NumError

impl Sync for NumError

impl Unpin for NumError

impl UnsafeUnpin for NumError

impl UnwindSafe for NumError

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> AnyExt for T
where T: Any + ?Sized,

fn type_id() -> TypeId

Returns the TypeId of Self. Read more

fn type_of(&self) -> TypeId

Returns the TypeId of self. Read more

fn type_name(&self) -> &'static str ⓘ

Returns the type name of self. Read more

fn type_is<T: 'static>(&self) -> bool

Returns true if Self is of type T. Read more

fn type_hash(&self) -> u64

Returns a deterministic hash of the TypeId of Self.

fn type_hash_with<H: Hasher>(&self, hasher: H) -> u64

Returns a deterministic hash of the TypeId of Self using a custom hasher.

fn as_any_ref(&self) -> &dyn Any
where Self: Sized,

Upcasts &self as &dyn Any. Read more

fn as_any_mut(&mut self) -> &mut dyn Any
where Self: Sized,

Upcasts &mut self as &mut dyn Any. Read more

fn as_any_box(self: Box<Self>) -> Box<dyn Any>
where Self: Sized,

Available on crate feature alloc only.

Upcasts Box<self> as Box<dyn Any>. Read more

fn downcast_ref<T: 'static>(&self) -> Option<&T> ⓘ

Available on crate feature unsafe_layout and non-crate feature safe_code only.

Returns some shared reference to the inner value if it is of type T. Read more

fn downcast_mut<T: 'static>(&mut self) -> Option<&mut T> ⓘ

Available on crate feature unsafe_layout and non-crate feature safe_code only.

Returns some exclusive reference to the inner value if it is of type T. Read more

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

impl<T> ByteSized for T

const BYTE_ALIGN: usize = _

The alignment of this type in bytes.

const BYTE_SIZE: usize = _

The size of this type in bytes.

fn byte_align(&self) -> usize

Returns the alignment of this type in bytes.

fn byte_size(&self) -> usize

Returns the size of this type in bytes. Read more

fn ptr_size_ratio(&self) -> [usize; 2]

Returns the size ratio between Ptr::BYTES and BYTE_SIZE. Read more

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

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Hook for T

fn hook<F>(self, f: F) -> Self
where F: FnOnce(&mut Self),

Hooks a mutation step into the value and returns it. Read more

fn tap<F>(self, f: F) -> Self
where F: FnOnce(&Self),

Taps into the value for observation and returns it unchanged. Read more

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

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> MemExt for T
where T: ?Sized,

const NEEDS_DROP: bool = _

Know whether dropping values of this type matters, in compile-time.

fn mem_align_of<T>() -> usize

Returns the minimum alignment of the type in bytes. Read more

fn mem_align_of_val(&self) -> usize

Returns the alignment of the pointed-to value in bytes. Read more

fn mem_size_of<T>() -> usize

Returns the size of a type in bytes. Read more

fn mem_size_of_val(&self) -> usize

Returns the size of the pointed-to value in bytes. Read more

fn mem_copy(&self) -> Self
where Self: Copy,

Bitwise-copies a value. Read more

fn mem_needs_drop(&self) -> bool

Returns true if dropping values of this type matters. Read more

fn mem_drop(self)
where Self: Sized,

Drops self by running its destructor. Read more

fn mem_forget(self)
where Self: Sized,

Forgets about self without running its destructor. Read more

fn mem_replace(&mut self, other: Self) -> Self
where Self: Sized,

Replaces self with other, returning the previous value of self. Read more

fn mem_take(&mut self) -> Self
where Self: Default,

Replaces self with its default value, returning the previous value of self. Read more

fn mem_swap(&mut self, other: &mut Self)
where Self: Sized,

Swaps the value of self and other without deinitializing either one. Read more

unsafe fn mem_zeroed<T>() -> T

Available on crate feature unsafe_layout only.

Returns the value of type T represented by the all-zero byte-pattern. Read more

unsafe fn mem_transmute_copy<Src, Dst>(src: &Src) -> Dst

Available on crate feature unsafe_layout only.

Returns the value of type T represented by the all-zero byte-pattern. Read more

fn mem_as_bytes(&self) -> &[u8] ⓘ
where Self: Sync + Unpin,

Available on crate feature unsafe_slice only.

View a Sync + Unpin self as &[u8]. Read more

fn mem_as_bytes_mut(&mut self) -> &mut [u8] ⓘ
where Self: Sync + Unpin,

Available on crate feature unsafe_slice only.

View a Sync + Unpin self as &mut [u8]. Read more

impl<T, R> Morph<R> for T
where T: ?Sized,

fn morph<F>(self, f: F) -> R
where F: FnOnce(Self) -> R, Self: Sized,

Morphs the value into a new one and returns it. Read more

fn morph_ref<F>(&self, f: F) -> R
where F: FnOnce(&Self) -> R,

Morphs the value by shared reference and returns the result. Read more

fn morph_mut<F>(&mut self, f: F) -> R
where F: FnOnce(&mut Self) -> R,

Morphs the value by exclusive reference and returns the result. Read more

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,

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 = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !> ⓘ

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.

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

Performs the conversion.