pub struct StandardError { /* private fields */ }
Expand description

Ruby StandardError error type.

Descendants of class Exception are used to communicate between Kernel#raise and rescue statements in begin ... end blocks. Exception objects carry information about the exception – its type (the exception’s class name), an optional descriptive string, and optional traceback information. Exception subclasses may add additional information like NameError#name.

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impl StandardError

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pub const fn new() -> StandardError

Construct a new, default StandardError Ruby exception.

This constructor sets the exception message to StandardError.

Examples
let exception = StandardError::new();
assert_eq!(exception.message(), b"StandardError");
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pub const fn with_message(message: &'static str) -> StandardError

Construct a new, StandardError Ruby exception with the given message.

Examples
let exception = StandardError::with_message("an error occurred");
assert_eq!(exception.message(), b"an error occurred");
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pub fn message(&self) -> &[u8]

Return the message this Ruby exception was constructed with.

Examples
let exception = StandardError::new();
assert_eq!(exception.message(), b"StandardError");
let exception = StandardError::from("something went wrong");
assert_eq!(exception.message(), b"something went wrong");
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pub const fn name(&self) -> &'static str

Return this Ruby exception’s class name.

Examples
let exception = StandardError::new();
assert_eq!(exception.name(), "StandardError");

Trait Implementations§

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impl Clone for StandardError

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fn clone(&self) -> StandardError

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl Debug for StandardError

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

Formats the value using the given formatter. Read more
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impl Default for StandardError

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fn default() -> StandardError

Returns the “default value” for a type. Read more
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impl Display for StandardError

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

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

1.30.0 · source§

fn source(&self) -> Option<&(dyn Error + 'static)>

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()
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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, demand: &mut Demand<'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<&'static [u8]> for StandardError

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fn from(message: &'static [u8]) -> StandardError

Converts to this type from the input type.
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impl From<&'static str> for StandardError

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fn from(message: &'static str) -> StandardError

Converts to this type from the input type.
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impl From<Cow<'static, [u8]>> for StandardError

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fn from(message: Cow<'static, [u8]>) -> StandardError

Converts to this type from the input type.
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impl From<Cow<'static, str>> for StandardError

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fn from(message: Cow<'static, str>) -> StandardError

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

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fn from(exception: StandardError) -> Error

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

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fn from(message: String) -> StandardError

Converts to this type from the input type.
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impl From<Vec<u8, Global>> for StandardError

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fn from(message: Vec<u8, Global>) -> StandardError

Converts to this type from the input type.
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impl Hash for StandardError

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fn hash<__H>(&self, state: &mut __H)where
    __H: Hasher,

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
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impl Ord for StandardError

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fn cmp(&self, other: &StandardError) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more
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impl PartialEq<StandardError> for StandardError

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd<StandardError> for StandardError

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fn partial_cmp(&self, other: &StandardError) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

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

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl RubyException for StandardError

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fn message(&self) -> Cow<'_, [u8]>

The exception’s message. Read more
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fn name(&self) -> Cow<'_, str>

The exception’s class name. Read more
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impl RubyException for StandardError

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fn message(&self) -> Cow<'_, [u8]>

Message of the Exception. Read more
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fn name(&self) -> Cow<'_, str>

Class name of the Exception.
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fn vm_backtrace(&self, interp: &mut Artichoke) -> Option<Vec<Vec<u8>>>

Optional backtrace specified by a Vec of frames.
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fn as_mrb_value(&self, interp: &mut Artichoke) -> Option<mrb_value>

Return a raise-able sys::mrb_value.
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impl Eq for StandardError

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impl StructuralEq for StandardError

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impl StructuralPartialEq for StandardError

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere
    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 Twhere
    T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

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

const: unstable · source§

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

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source§

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<E> Provider for Ewhere
    E: Error + ?Sized,

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fn provide<'a>(&'a self, demand: &mut Demand<'a>)

🔬This is a nightly-only experimental API. (provide_any)
Data providers should implement this method to provide all values they are able to provide by using demand. Read more
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impl<T> ToOwned for Twhere
    T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere
    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 Twhere
    U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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 Twhere
    U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.