Struct Label 

pub struct Label { /* private fields */ }

A labeled span in source code.

Labels attach messages to specific locations in the source, helping users understand where problems occurred and why.

Primary vs Secondary Labels

• Primary labels mark the main location of an error or warning. There should typically be one primary label per diagnostic.
• Secondary labels provide additional context, such as “first defined here” or “also referenced here”.

Example

error[E301]: cannot override built-in type `Rectangle`
  --> src/main.orr:10:1
   |
10 | type Rectangle = Oval[fill_color="red"];
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type override not supported

Implementations

impl Label

pub fn primary(span: Span, message: impl Into<String>) -> Self

Create a new primary label.

Primary labels mark the main location of an error or warning.

pub fn secondary(span: Span, message: impl Into<String>) -> Self

Create a new secondary label.

Secondary labels provide additional context for the diagnostic.

pub fn span(&self) -> Span

Get the span this label applies to.

pub fn message(&self) -> &str

Get the label message.

pub fn is_primary(&self) -> bool

Check if this is a primary label.

pub fn is_secondary(&self) -> bool

Check if this is a secondary label.

Trait Implementations

impl Clone for Label

fn clone(&self) -> Label

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Label

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

Formats the value using the given formatter.