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.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so 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<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 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 Metrics

const SIZE: usize = 4usize

impl FromData for KerningPair

const SIZE: usize = 6usize

impl FromData for EntryData

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 Tag

const SIZE: usize = 4usize

impl FromData for VariationAxis

const SIZE: usize = 20usize

impl FromData for VerticalOriginMetrics

const SIZE: usize = 4usize

impl<T> FromData for GenericStateEntry<T>

where T: FromData,

const SIZE: usize