Struct AstMetadata 

pub struct AstMetadata {
    pub span: Option<ByteRange>,
    pub type_hint: Option<String>,
    pub synthetic: bool,
    pub tags: Vec<String>,
}

Metadata attached to an AST node during parsing or elaboration.

Fields

span: Option<ByteRange>

Source span of the node.

type_hint: Option<String>

Elaboration-time type annotation (stringified).

synthetic: bool

Whether this node was synthesized (not from real source).

tags: Vec<String>

Arbitrary string tags for tooling.

Implementations

impl AstMetadata

pub fn empty() -> Self

Create empty metadata.

pub fn with_span(span: ByteRange) -> Self

Create metadata with a span.

pub fn synthetic() -> Self

Mark as synthetic.

pub fn add_tag(&mut self, tag: impl Into<String>)

Add a tag.

pub fn has_tag(&self, tag: &str) -> bool

Whether a tag is present.

Trait Implementations

impl Clone for AstMetadata

fn clone(&self) -> AstMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AstMetadata

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

Formats the value using the given formatter.

impl Default for AstMetadata

fn default() -> AstMetadata

Returns the “default value” for a type.