Trait FromData

pub trait FromData: Sized {
    const SIZE: usize;

    // Required method
    fn parse(data: &[u8]) -> Option<Self>;
}

A trait for parsing raw binary data of fixed size.

This is a low-level, internal trait that should not be used directly.

Required Associated Constants

const SIZE: usize

Object’s raw data size.

Not always the same as mem::size_of.

Required Methods

fn parse(data: &[u8]) -> Option<Self>

Parses an object from a raw data.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl FromData for Option<Offset16>

const SIZE: usize = 2usize

fn parse(data: &[u8]) -> Option<Option<Offset16>>

impl FromData for Option<Offset24>

const SIZE: usize = 3usize

fn parse(data: &[u8]) -> Option<Option<Offset24>>

impl FromData for Option<Offset32>

const SIZE: usize = 4usize

fn parse(data: &[u8]) -> Option<Option<Offset32>>

impl FromData for i8

const SIZE: usize = 1usize

fn parse(data: &[u8]) -> Option<i8>

impl FromData for i16

const SIZE: usize = 2usize

fn parse(data: &[u8]) -> Option<i16>

impl FromData for i32

const SIZE: usize = 4usize

fn parse(data: &[u8]) -> Option<i32>

impl FromData for u8

const SIZE: usize = 1usize

fn parse(data: &[u8]) -> Option<u8>

impl FromData for u16

const SIZE: usize = 2usize

fn parse(data: &[u8]) -> Option<u16>

impl FromData for u32

const SIZE: usize = 4usize

fn parse(data: &[u8]) -> Option<u32>

impl FromData for u64

const SIZE: usize = 8usize

fn parse(data: &[u8]) -> Option<u64>

impl FromData for ()

const SIZE: usize = 0usize

fn parse(_: &[u8]) -> Option<()>

Implementors

impl FromData for CompositeMode

const SIZE: usize = 1usize

impl FromData for GradientExtend

const SIZE: usize = 1usize

impl FromData for PlatformId

const SIZE: usize = 2usize

impl FromData for Point

const SIZE: usize = 4usize

impl FromData for AxisValueMap

const SIZE: usize = 4usize

impl FromData for SettingName

const SIZE: usize = 4usize

impl FromData for VariationAxis

const SIZE: usize = 20usize

impl FromData for Metrics

const SIZE: usize = 4usize

impl FromData for KerningPair

const SIZE: usize = 6usize

impl FromData for EntryData

const SIZE: usize = 2usize

impl FromData for GlyphPart

const SIZE: usize = 10usize

impl FromData for GlyphVariant

const SIZE: usize = 4usize

impl FromData for PartFlags

const SIZE: usize = 2usize

impl FromData for ContextualEntryData

const SIZE: usize = 4usize

impl FromData for Feature

const SIZE: usize = 12usize

impl FromData for InsertionEntryData

const SIZE: usize = 4usize

impl FromData for LookupFlags

const SIZE: usize = 2usize

impl FromData for RangeRecord

const SIZE: usize = 6usize

impl FromData for SequenceLookupRecord

const SIZE: usize = 4usize

impl FromData for Fixed

const SIZE: usize = 4usize

impl FromData for GlyphId

const SIZE: usize = 2usize

impl FromData for TableRecord

const SIZE: usize = 16usize

impl FromData for Tag

const SIZE: usize = 4usize

impl FromData for VerticalOriginMetrics

const SIZE: usize = 4usize

impl<T> FromData for GenericStateEntry<T>

where T: FromData,

const SIZE: usize = _