Struct gstreamer::format::Default

pub struct Default(pub Option<u64>);

Methods from Deref<Target = Option<u64>>

#[must_use = "if you intended to assert that this has a value, consider `.unwrap()` instead"]pub const fn is_some(&self) -> bool

Returns true if the option is a Some value.

Examples

let x: Option<u32> = Some(2);
assert_eq!(x.is_some(), true);

let x: Option<u32> = None;
assert_eq!(x.is_some(), false);

#[must_use = "if you intended to assert that this doesn't have a value, consider \ `.and_then(|| panic!(\"`Option` had a value when expected `None`\"))` instead"]pub const fn is_none(&self) -> bool

Returns true if the option is a None value.

Examples

let x: Option<u32> = Some(2);
assert_eq!(x.is_none(), false);

let x: Option<u32> = None;
assert_eq!(x.is_none(), true);

#[must_use]pub fn contains<U>(&self, x: &U) -> bool where
    U: PartialEq<T>, 

🔬 This is a nightly-only experimental API. (option_result_contains)

Returns true if the option is a Some value containing the given value.

Examples

#![feature(option_result_contains)]

let x: Option<u32> = Some(2);
assert_eq!(x.contains(&2), true);

let x: Option<u32> = Some(3);
assert_eq!(x.contains(&2), false);

let x: Option<u32> = None;
assert_eq!(x.contains(&2), false);

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

Converts from &Option<T> to Option<&T>.

Examples

Converts an Option<String> into an Option<usize>, preserving the original. The map method takes the self argument by value, consuming the original, so this technique uses as_ref to first take an Option to a reference to the value inside the original.

let text: Option<String> = Some("Hello, world!".to_string());
// First, cast `Option<String>` to `Option<&String>` with `as_ref`,
// then consume *that* with `map`, leaving `text` on the stack.
let text_length: Option<usize> = text.as_ref().map(|s| s.len());
println!("still can print text: {:?}", text);

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

Converts from &mut Option<T> to Option<&mut T>.

Examples

let mut x = Some(2);
match x.as_mut() {
    Some(v) => *v = 42,
    None => {},
}
assert_eq!(x, Some(42));

pub fn as_pin_ref(self: Pin<&Option<T>>) -> Option<Pin<&T>>

Converts from Pin<&Option<T>> to Option<Pin<&T>>.

pub fn as_pin_mut(self: Pin<&mut Option<T>>) -> Option<Pin<&mut T>>

Converts from Pin<&mut Option<T>> to Option<Pin<&mut T>>.

pub const fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

Examples

let x = Some(4);
assert_eq!(x.iter().next(), Some(&4));

let x: Option<u32> = None;
assert_eq!(x.iter().next(), None);

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

Examples

let mut x = Some(4);
match x.iter_mut().next() {
    Some(v) => *v = 42,
    None => {},
}
assert_eq!(x, Some(42));

let mut x: Option<u32> = None;
assert_eq!(x.iter_mut().next(), None);

pub fn get_or_insert(&mut self, v: T) -> &mut T

Inserts v into the option if it is None, then returns a mutable reference to the contained value.

Examples

let mut x = None;

{
    let y: &mut u32 = x.get_or_insert(5);
    assert_eq!(y, &5);

    *y = 7;
}

assert_eq!(x, Some(7));

pub fn get_or_insert_with<F>(&mut self, f: F) -> &mut T where
    F: FnOnce() -> T, 

Inserts a value computed from f into the option if it is None, then returns a mutable reference to the contained value.

Examples

let mut x = None;

{
    let y: &mut u32 = x.get_or_insert_with(|| 5);
    assert_eq!(y, &5);

    *y = 7;
}

assert_eq!(x, Some(7));

pub fn take(&mut self) -> Option<T>

Takes the value out of the option, leaving a None in its place.

Examples

let mut x = Some(2);
let y = x.take();
assert_eq!(x, None);
assert_eq!(y, Some(2));

let mut x: Option<u32> = None;
let y = x.take();
assert_eq!(x, None);
assert_eq!(y, None);

pub fn replace(&mut self, value: T) -> Option<T>

Replaces the actual value in the option by the value given in parameter, returning the old value if present, leaving a Some in its place without deinitializing either one.

Examples

let mut x = Some(2);
let old = x.replace(5);
assert_eq!(x, Some(5));
assert_eq!(old, Some(2));

let mut x = None;
let old = x.replace(3);
assert_eq!(x, Some(3));
assert_eq!(old, None);

pub fn as_deref(&self) -> Option<&<T as Deref>::Target>

Converts from Option<T> (or &Option<T>) to Option<&T::Target>.

Leaves the original Option in-place, creating a new one with a reference to the original one, additionally coercing the contents via Deref.

Examples

let x: Option<String> = Some("hey".to_owned());
assert_eq!(x.as_deref(), Some("hey"));

let x: Option<String> = None;
assert_eq!(x.as_deref(), None);

pub fn as_deref_mut(&mut self) -> Option<&mut <T as Deref>::Target>

Converts from Option<T> (or &mut Option<T>) to Option<&mut T::Target>.

Leaves the original Option in-place, creating a new one containing a mutable reference to the inner type's Deref::Target type.

Examples

let mut x: Option<String> = Some("hey".to_owned());
assert_eq!(x.as_deref_mut().map(|x| {
    x.make_ascii_uppercase();
    x
}), Some("HEY".to_owned().as_mut_str()));

Trait Implementations

impl<'a> Add<&'a Default> for Default

type Output = Default

The resulting type after applying the + operator.

fn add(self, other: &'a Default) -> Default

Performs the + operation.

impl<'a, 'b> Add<&'a Default> for &'b Default

type Output = Default

The resulting type after applying the + operator.

fn add(self, other: &'a Default) -> Default

Performs the + operation.

impl Add<Default> for Default

type Output = Default

The resulting type after applying the + operator.

fn add(self, other: Default) -> Default

Performs the + operation.

impl<'a> Add<Default> for &'a Default

type Output = Default

The resulting type after applying the + operator.

fn add(self, other: Default) -> Default

Performs the + operation.

impl<'a> AddAssign<&'a Default> for Default

fn add_assign(&mut self, other: &'a Default)

Performs the += operation.

impl AddAssign<Default> for Default

fn add_assign(&mut self, other: Default)

Performs the += operation.

impl AsMut<Option<u64>> for Default

fn as_mut(&mut self) -> &mut Option<u64>

Performs the conversion.

impl AsRef<Option<u64>> for Default

fn as_ref(&self) -> &Option<u64>

Performs the conversion.

impl Clone for Default

fn clone(&self) -> Default

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for Default

impl Debug for Default

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

Formats the value using the given formatter.

impl Default for Default

fn default() -> Default

Returns the "default value" for a type.

impl Deref for Default

type Target = Option<u64>

The resulting type after dereferencing.

fn deref(&self) -> &Option<u64>

Dereferences the value.

impl DerefMut for Default

fn deref_mut(&mut self) -> &mut Option<u64>

Mutably dereferences the value.

impl<'de> Deserialize<'de> for Default

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl<'a> Div<&'a Default> for Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a Default) -> Default

Performs the / operation.

impl<'a, 'b> Div<&'a Default> for &'b Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a Default) -> Default

Performs the / operation.

impl<'a> Div<&'a Default> for u64

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a Default) -> Default

Performs the / operation.

impl<'a, 'b> Div<&'a Default> for &'b u64

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a Default) -> Default

Performs the / operation.

impl<'a> Div<&'a u64> for Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a u64) -> Default

Performs the / operation.

impl<'a, 'b> Div<&'a u64> for &'b Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: &'a u64) -> Default

Performs the / operation.

impl Div<Default> for Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: Default) -> Default

Performs the / operation.

impl<'a> Div<Default> for &'a Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: Default) -> Default

Performs the / operation.

impl Div<Default> for u64

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: Default) -> Default

Performs the / operation.

impl<'a> Div<Default> for &'a u64

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: Default) -> Default

Performs the / operation.

impl Div<u64> for Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: u64) -> Default

Performs the / operation.

impl<'a> Div<u64> for &'a Default

type Output = Default

The resulting type after applying the / operator.

fn div(self, other: u64) -> Default

Performs the / operation.

impl<'a> DivAssign<&'a Default> for Default

fn div_assign(&mut self, other: &'a Default)

Performs the /= operation.

impl<'a> DivAssign<&'a u64> for Default

fn div_assign(&mut self, other: &'a u64)

Performs the /= operation.

impl DivAssign<Default> for Default

fn div_assign(&mut self, other: Default)

Performs the /= operation.

impl DivAssign<u64> for Default

fn div_assign(&mut self, other: u64)

Performs the /= operation.

impl Eq for Default

impl FormattedValue for Default

fn get_default_format() -> Format

fn get_format(&self) -> Format

unsafe fn from_raw(format: Format, value: i64) -> Self

unsafe fn to_raw_value(&self) -> i64

impl From<Default> for GenericFormattedValue

fn from(v: Default) -> GenericFormattedValue

Performs the conversion.

impl From<Option<u64>> for Default

fn from(v: Option<u64>) -> Default

Performs the conversion.

impl From<u64> for Default

fn from(v: u64) -> Default

Performs the conversion.

impl Hash for Default

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, 

Feeds a slice of this type into the given Hasher.

impl Into<Option<u64>> for Default

fn into(self) -> Option<u64>

Performs the conversion.

impl<'a> Mul<&'a Default> for Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a Default) -> Default

Performs the * operation.

impl<'a, 'b> Mul<&'a Default> for &'b Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a Default) -> Default

Performs the * operation.

impl<'a> Mul<&'a Default> for u64

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a Default) -> Default

Performs the * operation.

impl<'a, 'b> Mul<&'a Default> for &'b u64

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a Default) -> Default

Performs the * operation.

impl<'a> Mul<&'a u64> for Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a u64) -> Default

Performs the * operation.

impl<'a, 'b> Mul<&'a u64> for &'b Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: &'a u64) -> Default

Performs the * operation.

impl Mul<Default> for Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: Default) -> Default

Performs the * operation.

impl<'a> Mul<Default> for &'a Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: Default) -> Default

Performs the * operation.

impl Mul<Default> for u64

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: Default) -> Default

Performs the * operation.

impl<'a> Mul<Default> for &'a u64

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: Default) -> Default

Performs the * operation.

impl Mul<u64> for Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: u64) -> Default

Performs the * operation.

impl<'a> Mul<u64> for &'a Default

type Output = Default

The resulting type after applying the * operator.

fn mul(self, other: u64) -> Default

Performs the * operation.

impl<'a> MulAssign<&'a Default> for Default

fn mul_assign(&mut self, other: &'a Default)

Performs the *= operation.

impl<'a> MulAssign<&'a u64> for Default

fn mul_assign(&mut self, other: &'a u64)

Performs the *= operation.

impl MulAssign<Default> for Default

fn mul_assign(&mut self, other: Default)

Performs the *= operation.

impl MulAssign<u64> for Default

fn mul_assign(&mut self, other: u64)

Performs the *= operation.

impl<'a> MulDiv<&'a Default> for Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a> MulDiv<&'a u64> for Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a, 'b> MulDiv<&'a u64> for &'b Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: &u64, denom: &u64) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a, 'b> MulDiv<&'b Default> for &'a Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: &Default, denom: &Default) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl MulDiv<Default> for Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a> MulDiv<Default> for &'a Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: Default, denom: Default) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a> MulDiv<u64> for Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl<'a> MulDiv<u64> for &'a Default

type Output = Default

Output type for the methods of this trait.

fn mul_div_floor(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates floor(val * num / denom), i.e. the largest integer less than or equal to the result of the division.

fn mul_div_round(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates round(val * num / denom), i.e. the closest integer to the result of the division. If both surrounding integers are the same distance (x.5), the one with the bigger absolute value is returned (round away from 0.0).

fn mul_div_ceil(self, num: u64, denom: u64) -> Option<Self::Output>

Calculates ceil(val * num / denom), i.e. the the smallest integer greater than or equal to the result of the division.

impl Ord for Default

fn cmp(&self, other: &Default) -> Ordering

This method returns an Ordering between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Default> for Default

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<Default> for Default

fn partial_cmp(&self, other: &Default) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Default) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Default) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Default) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Default) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a> Rem<&'a Default> for Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a Default) -> Default

Performs the % operation.

impl<'a, 'b> Rem<&'a Default> for &'b Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a Default) -> Default

Performs the % operation.

impl<'a> Rem<&'a Default> for u64

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a Default) -> Default

Performs the % operation.

impl<'a, 'b> Rem<&'a Default> for &'b u64

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a Default) -> Default

Performs the % operation.

impl<'a> Rem<&'a u64> for Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a u64) -> Default

Performs the % operation.

impl<'a, 'b> Rem<&'a u64> for &'b Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: &'a u64) -> Default

Performs the % operation.

impl Rem<Default> for Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: Default) -> Default

Performs the % operation.

impl<'a> Rem<Default> for &'a Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: Default) -> Default

Performs the % operation.

impl Rem<Default> for u64

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: Default) -> Default

Performs the % operation.

impl<'a> Rem<Default> for &'a u64

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: Default) -> Default

Performs the % operation.

impl Rem<u64> for Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: u64) -> Default

Performs the % operation.

impl<'a> Rem<u64> for &'a Default

type Output = Default

The resulting type after applying the % operator.

fn rem(self, other: u64) -> Default

Performs the % operation.

impl<'a> RemAssign<&'a Default> for Default

fn rem_assign(&mut self, other: &'a Default)

Performs the %= operation.

impl<'a> RemAssign<&'a u64> for Default

fn rem_assign(&mut self, other: &'a u64)

Performs the %= operation.

impl RemAssign<Default> for Default

fn rem_assign(&mut self, other: Default)

Performs the %= operation.

impl RemAssign<u64> for Default

fn rem_assign(&mut self, other: u64)

Performs the %= operation.

impl Serialize for Default

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl SpecificFormattedValue for Default

impl StructuralEq for Default

impl StructuralPartialEq for Default

impl<'a> Sub<&'a Default> for Default

type Output = Default

The resulting type after applying the - operator.

fn sub(self, other: &'a Default) -> Default

Performs the - operation.

impl<'a, 'b> Sub<&'a Default> for &'b Default

type Output = Default

The resulting type after applying the - operator.

fn sub(self, other: &'a Default) -> Default

Performs the - operation.

impl Sub<Default> for Default

type Output = Default

The resulting type after applying the - operator.

fn sub(self, other: Default) -> Default

Performs the - operation.

impl<'a> Sub<Default> for &'a Default

type Output = Default

The resulting type after applying the - operator.

fn sub(self, other: Default) -> Default

Performs the - operation.

impl<'a> SubAssign<&'a Default> for Default

fn sub_assign(&mut self, other: &'a Default)

Performs the -= operation.

impl SubAssign<Default> for Default

fn sub_assign(&mut self, other: Default)

Performs the -= operation.

impl TryFrom<GenericFormattedValue> for Default

type Error = TryFromGenericFormattedValueError

The type returned in the event of a conversion error.

fn try_from(
    v: GenericFormattedValue
) -> Result<Default, TryFromGenericFormattedValueError>

Performs the conversion.