Struct ExtensionAnchors 

pub struct ExtensionAnchors { /* private fields */ }

Available on crate feature parse only.

Tracks the known anchors for simple extensions, as needed for parsing a Substrait protobuf.

At the moment, this only tracks simple extension URNs by anchor, as further parsing of simple extensions, or the protobuf plan itself, is not supported yet.

Implementations

impl ExtensionAnchors

pub fn add_simple_extension_urn( &mut self, simple_extension_urn: &SimpleExtensionUrn, ) -> Result<(), ContextError>

Register a SimpleExtensionUrn with this registry, rejecting duplicate anchors.

pub fn get_simple_extension_urn( &self, anchor: &Typed<u32, SimpleExtensionUrn>, ) -> Option<&Urn>

Look up the Urn for a previously registered anchor. Returns an error if the anchor has not been seen.

Trait Implementations

impl Default for ExtensionAnchors

fn default() -> ExtensionAnchors

Returns the “default value” for a type.