Trait SpannedLike 

pub trait SpannedLike<T>: Clone {
    type Span: SpanLike;

    // Required methods
    fn span(&self) -> &Self::Span;
    fn value_ref(&self) -> &T;
    fn value(self) -> T;
    fn new(start: usize, end: usize, value: T) -> Self;

    // Provided method
    fn map<U, F>(self, f: F) -> impl SpannedLike<U, Span = Self::Span>
       where U: Clone,
             F: FnOnce(T) -> U,
             Self: Sized { ... }
}

A value paired with its source location span.

Wraps any value T with span information for error reporting and source mapping. Implementations must be Clone to support backtracking.

Required Associated Types

type Span: SpanLike

The span type used to track source locations.

Required Methods

fn span(&self) -> &Self::Span

Returns a reference to the span.

fn value_ref(&self) -> &T

Returns a reference to the wrapped value.

fn value(self) -> T

Consumes self and returns the wrapped value.

fn new(start: usize, end: usize, value: T) -> Self

Creates a new spanned value from offsets and a value.

Provided Methods

fn map<U, F>(self, f: F) -> impl SpannedLike<U, Span = Self::Span>

where U: Clone, F: FnOnce(T) -> U, Self: Sized,

Maps the inner value while preserving the span.

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.

Implementors