# [−] [src] Struct rand_core::Error

    pub struct Error { /* fields omitted */ }

Error type of random number generators

In order to be compatible with `std` and `no_std`, this type has two possible implementations: with `std` a boxed `Error` trait object is stored, while with `no_std` we merely store an error code.

## Methods

### `impl Error` [src]

#### `pub fn new<E>(err: E) -> Self where
E: Into<Box<dyn Error + Send + Sync + 'static>>,` [src]

Construct from any type supporting `std::error::Error`

Available only when configured with `std`.

See also `From<NonZeroU32>`, which is available with and without `std`.

#### `pub fn inner(&self) -> &(dyn Error + Send + Sync + 'static)` [src]

Reference the inner error (`std` only)

When configured with `std`, this is a trivial operation and never panics. Without `std`, this method is simply unavailable.

#### `pub fn take_inner(self) -> Box<dyn Error + Send + Sync + 'static>` [src]

Unwrap the inner error (`std` only)

When configured with `std`, this is a trivial operation and never panics. Without `std`, this method is simply unavailable.

#### `pub fn code(&self) -> Option<NonZeroU32>` [src]

Retrieve the error code, if any.

If this `Error` was constructed via `From<NonZeroU32>`, then this method will return this `NonZeroU32` code (for `no_std` this is always the case). Otherwise, this method will return `None`.

## Trait Implementations

### `impl From<NonZeroU32> for Error` [src]

#### `fn from(code: NonZeroU32) -> Self` [src]

Performs the conversion.

### `impl From<Error> for Error` [src]

#### `fn from(error: Error) -> Self` [src]

Performs the conversion.

### `impl From<Error> for Error` [src]

#### `fn from(error: Error) -> Self` [src]

Performs the conversion.

### `impl Display for Error` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl Debug for Error` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl Error for Error` [src]

#### `fn source(&self) -> Option<&(dyn Error + 'static)>` [src]

The lower-level source of this error, if any. Read more

#### `fn description(&self) -> &str` 1.0.0 [src]

This method is soft-deprecated. Read more

#### `fn cause(&self) -> Option<&dyn Error>`1.0.0 [src]

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

The lower-level cause of this error, if any. Read more

## Auto Trait Implementations

### `impl Send for Error`

### `impl Sync for Error`

## Blanket Implementations

### `impl<T> From<T> for T` [src]

#### `fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T> ToString for T where
T: Display + ?Sized,` [src]

#### `default fn to_string(&self) -> String` [src]

Converts the given value to a `String`. Read more

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `fn into(self) -> U` [src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

#### `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>` [src]

Performs the conversion.

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

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