Struct LazyError 

pub struct LazyError(/* private fields */);

Error type for Lazy evaluation failures.

This error is returned when a thunk panics during evaluation.

Implementations

impl LazyError

pub fn from_panic(payload: Box<dyn Any + Send + 'static>) -> Self

Creates a LazyError from a panic payload.

Type Signature

Box (dyn Any + Send) -> LazyError

Parameters

• payload: The panic payload.

Returns

A new LazyError.

Examples

use fp_library::types::*;

let payload = Box::new("oops");
let error = LazyError::from_panic(payload);
assert_eq!(error.to_string(), "thunk panicked during evaluation: oops");

pub fn panic_message(&self) -> Option<&str>

Returns the panic message, if available.

Type Signature

LazyError -> Option &str

Returns

The panic message as a string slice, or None if no message was captured.

Examples

use fp_library::types::*;

let payload = Box::new("oops");
let error = LazyError::from_panic(payload);
assert_eq!(error.panic_message(), Some("oops"));

Trait Implementations

impl Clone for LazyError

fn clone(&self) -> LazyError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LazyError

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

Formats the value using the given formatter.

impl Default for LazyError

fn default() -> LazyError

Returns the “default value” for a type.

impl Display for LazyError

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

Formats the value using the given formatter.

impl Error for LazyError

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

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.

impl Hash for LazyError

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for LazyError

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for LazyError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for LazyError

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

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for LazyError

impl StructuralPartialEq for LazyError