Trait AddContext

pub trait AddContext<I: Stream, C = &'static str>: Sized {
    // Provided method
    fn add_context(
        self,
        _input: &I,
        _token_start: &<I as Stream>::Checkpoint,
        _context: C,
    ) -> Self { ... }
}

Used by Parser::context to add custom data to error while backtracking

May be implemented multiple times for different kinds of context.

Provided Methods

fn add_context( self, _input: &I, _token_start: &<I as Stream>::Checkpoint, _context: C, ) -> Self

Append to an existing error custom data

This is used mainly by Parser::context, to add user friendly information to errors when backtracking through a parse tree

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<I: Stream, C> AddContext<I, C> for ()

Implementors

impl<C, I: Stream> AddContext<I, C> for ContextError<C>

impl<I, C> AddContext<I, C> for TreeError<I, C>

where I: Stream + Clone,

Available on crate feature std only.

impl<I: Stream + Clone, C> AddContext<I, C> for InputError<I>

impl<I: Stream, C> AddContext<I, C> for ErrorKind

impl<I: Stream, C, E: AddContext<I, C>> AddContext<I, C> for ErrMode<E>