Struct MessageDescriptor 

pub struct MessageDescriptor { /* private fields */ }

A linked message descriptor.

Constructed only by DescriptorPool; not constructible by downstream crates.

Implementations

impl MessageDescriptor

pub fn full_name(&self) -> &str

Fully-qualified proto name without leading dot, e.g. google.protobuf.Timestamp.

pub fn options(&self) -> Option<&MessageOptions>

The raw MessageOptions for this message, if any were declared.

See FieldDescriptor::options for how to read custom options.

pub fn fields(&self) -> &[FieldDescriptor]

Fields in source (declaration) order.

pub fn oneofs(&self) -> &[OneofDescriptor]

Oneof declarations, including proto3 synthetic oneofs.

pub fn extension_ranges(&self) -> &[(u32, u32)]

Extension ranges [start, end).

pub fn field(&self, number: u32) -> Option<&FieldDescriptor>

Look up a field by its proto field number. O(log n).

pub fn field_by_name(&self, name: &str) -> Option<&FieldDescriptor>

Look up a field by its proto field name or JSON name. O(log n).

CEL evaluators and JSON parsers both look fields up by name in a hot loop; this is the supported path. Both the proto field name and the camelCase JSON name resolve.

pub fn in_extension_range(&self, number: u32) -> bool

Whether number falls within any declared extension range.

Trait Implementations

impl Clone for MessageDescriptor

fn clone(&self) -> MessageDescriptor

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessageDescriptor

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

Formats the value using the given formatter.