Enum OptionFontRef 

#[repr(C, u8)]
pub enum OptionFontRef {
    None,
    Some(FontRef),
}

Variants

None

Some(FontRef)

Implementations

impl OptionFontRef

pub fn into_option(&self) -> Option<FontRef>

impl OptionFontRef

pub fn as_option(&self) -> Option<&FontRef>

pub fn replace(&mut self, value: FontRef) -> OptionFontRef

pub fn is_some(&self) -> bool

pub fn is_none(&self) -> bool

pub const fn as_ref(&self) -> Option<&FontRef>

pub fn as_mut(&mut self) -> Option<&mut FontRef>

pub fn map<U, F: FnOnce(FontRef) -> U>(self, f: F) -> Option<U>

pub fn and_then<U, F>(self, f: F) -> Option<U>

where F: FnOnce(FontRef) -> Option<U>,

Trait Implementations

impl Clone for OptionFontRef

fn clone(&self) -> OptionFontRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptionFontRef

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

Formats the value using the given formatter.

impl Default for OptionFontRef

fn default() -> OptionFontRef

Returns the “default value” for a type.

impl From<Option<FontRef>> for OptionFontRef

fn from(o: Option<FontRef>) -> OptionFontRef

Converts to this type from the input type.

impl From<OptionFontRef> for Option<FontRef>

fn from(o: OptionFontRef) -> Option<FontRef>

Converts to this type from the input type.

impl Hash for OptionFontRef

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OptionFontRef

fn eq(&self, other: &OptionFontRef) -> 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 Eq for OptionFontRef

impl StructuralPartialEq for OptionFontRef