Struct font_types::Nullable

pub struct Nullable<T>(/* private fields */);

An offset of a given width for which NULL (zero) is a valid value.

Implementations

impl<T> Nullable<T>

pub fn offset(&self) -> &T

Return a reference to the inner offset

impl<T: PartialEq<u32>> Nullable<T>

pub fn is_null(&self) -> bool

Trait Implementations

impl<T: Clone> Clone for Nullable<T>

fn clone(&self) -> Nullable<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Nullable<T>

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

Formats the value using the given formatter.

impl<T: NullValue> Default for Nullable<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq<u32>> PartialEq<u32> for Nullable<T>

fn eq(&self, other: &u32) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialEq> PartialEq for Nullable<T>

fn eq(&self, other: &Nullable<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Scalar> Scalar for Nullable<T>

type Raw = <T as Scalar>::Raw

The raw byte representation of this type.

fn from_raw(raw: Self::Raw) -> Self

Create an instance of this type from raw big-endian bytes

fn to_raw(self) -> Self::Raw

Encode this type as raw big-endian bytes

fn read(slice: &[u8]) -> Option<Self>

Attempt to read a scalar from a slice.

impl<T> Zeroable for Nullable<T>

where T: AnyBitPattern,

fn zeroed() -> Self

Calls zeroed.

impl<T> AnyBitPattern for Nullable<T>

where T: AnyBitPattern,

impl<T: Copy> Copy for Nullable<T>

impl<T: Eq> Eq for Nullable<T>

impl<T> StructuralPartialEq for Nullable<T>