Struct EncodedSizes 

pub struct EncodedSizes {
    pub proto3: Option<u32>,
    pub flatbuffers: Option<u32>,
    pub repr_c: Option<u32>,
}

A payload’s largest encoded size in bytes, one field per core encoding.

A field is None when the toolchain cannot size the payload for that encoding. That covers two cases the reader does not have to tell apart: the encoding cannot carry the payload at all, and the encoding can carry it but the size is not derivable yet, because the story that defines the layout has not landed. The repr(C) column is None for every payload until E11.12 defines the C-representable layout, and a backend that emits descriptors before its codec exists writes None for that codec’s column too.

So a consumer reads None as “no size is available here”, never as “this payload cannot be encoded this way”, and asks the catalog descriptor rather than this field when it needs to know which encodings a payload has.

Fields

proto3: Option<u32>

The proto3 size.

flatbuffers: Option<u32>

The FlatBuffers size.

repr_c: Option<u32>

The repr(C) size.

Trait Implementations

impl Clone for EncodedSizes

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EncodedSizes

impl Debug for EncodedSizes

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

Formats the value using the given formatter.

impl Eq for EncodedSizes

impl PartialEq for EncodedSizes

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for EncodedSizes