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".

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

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