Struct capnp::dynamic_struct::Reader

pub struct Reader<'a> { /* private fields */ }

A read-only dynamically-typed struct.

Implementations

impl<'a> Reader<'a>

pub fn new(reader: StructReader<'a>, schema: StructSchema) -> Self

pub fn total_size(&self) -> Result<MessageSize>

pub fn get_schema(&self) -> StructSchema

pub fn get(self, field: Field) -> Result<Reader<'a>>

pub fn get_named(self, field_name: &str) -> Result<Reader<'a>>

Gets the field with the given name.

pub fn which(&self) -> Result<Option<Field>>

If this struct has union fields, returns the one that is currently active. Otherwise, returns None.

pub fn has(&self, field: Field) -> Result<bool>

On a field that is part of a union, returns true if the field is active in the union and is not a null pointer. On non-union fields, returns true if the field is not a null pointer.

pub fn has_named(&self, field_name: &str) -> Result<bool>

Trait Implementations

impl<'a> Clone for Reader<'a>

fn clone(&self) -> Reader<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Reader<'a>

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

Formats the value using the given formatter.

impl<'a> DowncastReader<'a> for Reader<'a>

fn downcast_reader(value: Reader<'a>) -> Self

impl<'a> From<Reader<'a>> for Reader<'a>

fn from(x: Reader<'a>) -> Reader<'a>

Converts to this type from the input type.

impl<'a> SetterInput<Owned> for Reader<'a>

fn set_pointer_builder<'b>( pointer: PointerBuilder<'b>, value: Reader<'a>, canonicalize: bool ) -> Result<()>

Copies the values from input into builder, where builder represents the backing memory of a <Receiver as Owned>::Builder.

impl<'a> Copy for Reader<'a>