pub struct KeyError { /* private fields */ }
Expand description
Ruby KeyError
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
.
Implementations§
source§impl KeyError
impl KeyError
sourcepub const fn new() -> KeyError
pub const fn new() -> KeyError
Construct a new, default KeyError
Ruby exception.
This constructor sets the exception message to KeyError
.
Examples
let exception = KeyError::new();
assert_eq!(exception.message(), b"KeyError");
sourcepub const fn with_message(message: &'static str) -> KeyError
pub const fn with_message(message: &'static str) -> KeyError
Construct a new, KeyError
Ruby exception with the given
message.
Examples
let exception = KeyError::with_message("an error occurred");
assert_eq!(exception.message(), b"an error occurred");
sourcepub fn message(&self) -> &[u8] ⓘ
pub fn message(&self) -> &[u8] ⓘ
Return the message this Ruby exception was constructed with.
Examples
let exception = KeyError::new();
assert_eq!(exception.message(), b"KeyError");
let exception = KeyError::from("something went wrong");
assert_eq!(exception.message(), b"something went wrong");
Trait Implementations§
source§impl Error for KeyError
impl Error for KeyError
1.30.0 · source§fn source(&self) -> Option<&(dyn Error + 'static)>
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
fn description(&self) -> &str
👎Deprecated since 1.42.0: use the Display impl or to_string()
source§impl Ord for KeyError
impl Ord for KeyError
source§impl PartialEq<KeyError> for KeyError
impl PartialEq<KeyError> for KeyError
source§impl PartialOrd<KeyError> for KeyError
impl PartialOrd<KeyError> for KeyError
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
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