Enum ErrorTree 

pub enum ErrorTree<I> {
    Base {
        location: I,
        kind: BaseErrorKind,
    },
    Stack {
        base: Box<Self>,
        finalized: bool,
        contexts: Vec<(I, StackContext)>,
    },
    Alt(Vec<Self>),
}

Variants

Base

A specific error event at a specific location. Often this will indicate that something like a tag or character was expected at that location.

Fields

location: I

The location of this error in the input

kind: BaseErrorKind

The specific error that occurred

Stack

A stack indicates a chain of error contexts was provided. The stack should be read “backwards”; that is, errors earlier in the Vec occurred “sooner” (deeper in the call stack).

Fields

base: Box<Self>

The original error

finalized: bool

Whether it was indicated that the “final” useful context has been pushed onto the stack

contexts: Vec<(I, StackContext)>

The stack of contexts attached to that error

Alt(Vec<Self>)

A series of parsers were tried at the same location (for instance, via the alt2 combinator) and all of them failed.

Implementations

impl<I> ErrorTree<I>

pub fn add_context( location: I, ctx: &'static str, final_context: bool, other: Self, ) -> Self

Similar to append: Create a new error with some added context

Trait Implementations

impl<I: Debug> Debug for ErrorTree<I>

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

Formats the value using the given formatter.

impl<I: Display> Display for ErrorTree<I>

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

Formats the value using the given formatter.

impl<I: Display + Debug> Error for ErrorTree<I>

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<ErrorTree<Input<'_>>> for Error

fn from(e: InputParseError<'_>) -> Self

Converts to this type from the input type.

impl From<ErrorTree<Location>> for Error

fn from(e: ErrorTree<Location>) -> Self

Converts to this type from the input type.