Struct ExtParser 

pub struct ExtParser<'doc> { /* private fields */ }

Helper for parsing extension types ($ext-type) from Eure documents.

Similar API to RecordParser but for extension type fields.

Example

let mut ext = doc.parse_extension(node_id);
let optional = ext.field_optional::<bool>("optional")?;
let binding_style = ext.field_optional::<BindingStyle>("binding-style")?;
ext.allow_unknown_fields()?;

Implementations

impl<'doc> ExtParser<'doc>

pub fn node_id(&self) -> NodeId

Get the node ID being parsed.

pub fn ext<T: ParseDocument<'doc>>( &mut self, name: &str, ) -> Result<T, ParseError>

Get a required extension field.

Returns ParseErrorKind::MissingExtension if the extension is not present.

pub fn ext_optional<T: ParseDocument<'doc>>( &mut self, name: &str, ) -> Result<Option<T>, ParseError>

Get an optional extension field.

Returns Ok(None) if the extension is not present.

pub fn ext_node(&mut self, name: &str) -> Result<NodeId, ParseError>

Get the NodeId for an extension field (for manual handling).

Returns ParseErrorKind::MissingExtension if the extension is not present.

pub fn ext_node_optional(&mut self, name: &str) -> Option<NodeId>

Get the NodeId for an optional extension field.

Returns None if the extension is not present.

pub fn deny_unknown_extensions(self) -> Result<(), ParseError>

Finish parsing with Deny policy (error if unknown extensions exist).

pub fn allow_unknown_extensions(self)

Finish parsing with Allow policy (ignore unknown extensions).

pub fn unknown_extensions( &self, ) -> impl Iterator<Item = (&'doc Identifier, NodeId)> + '_

Get an iterator over unknown extensions (for custom handling).

Returns (identifier, node_id) pairs for extensions that haven’t been accessed.