Enum SliceError 

#[non_exhaustive]
pub enum SliceError {
    OverCap {
        slicer: String,
        produced: usize,
        cap: usize,
    },
    CapTooSmall {
        cap: usize,
        minimum: usize,
    },
    Store(StoreError),
    Unsuitable {
        slicer: String,
        detail: String,
    },
}

Slicing failed.

Variants (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.

OverCap

The slicer produced more than the cap allows.

A bug in the slicer, not a condition to handle: see the module documentation for why this is not silently truncated.

Fields

slicer: String

Which slicer overran.

produced: usize

What it produced.

cap: usize

What it was allowed.

CapTooSmall

The cap is too small to say anything at all.

Distinct from OverCap: the slicer did nothing wrong, the step declared a window that cannot hold even a summary. That is a flow authoring error and the message says so.

Fields

cap: usize

What was allowed.

minimum: usize

The least that would work.

Store(StoreError)

The raw output could not be preserved.

Unsuitable

The input was not what this slicer handles.

Carries the reason so a caller can decide to fall back — which is what the AST slicer does when a file does not parse (US-0702).

Fields

slicer: String

Which slicer declined.

detail: String

Why.

Implementations

impl SliceError

pub fn can_fall_back(&self) -> bool

Whether another slicer might succeed where this one did not.

True only for Unsuitable. An over-cap slicer is broken and a too-small cap is a flow error; neither is fixed by trying something else, and falling back on them would hide a real problem.

Trait Implementations

impl Clone for SliceError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SliceError

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

Formats the value using the given formatter.

impl Display for SliceError

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

Formats the value using the given formatter.

impl Eq for SliceError

impl Error for SliceError

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 From<StoreError> for SliceError

fn from(source: StoreError) -> Self

Converts to this type from the input type.

impl PartialEq for SliceError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SliceError