Struct windows_core::VARIANT

pub struct VARIANT(/* private fields */);

Expand description

A VARIANT (VARIANT) is a container that can store different types of values.

Implementations§

impl VARIANT

pub fn new() -> Self

Create an empty VARIANT.

This function does not allocate memory.

pub const fn is_empty(&self) -> bool

Returns true if the VARIANT is empty.

Trait Implementations§

impl Clone for VARIANT

fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for VARIANT

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

Formats the value using the given formatter. Read more

impl Default for VARIANT

fn default() -> Self

Returns the “default value” for a type. Read more

impl Display for VARIANT

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

Formats the value using the given formatter. Read more

impl Drop for VARIANT

fn drop(&mut self)

Executes the destructor for this type. Read more

impl From<&str> for VARIANT

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<BSTR> for VARIANT

fn from(value: BSTR) -> Self

Converts to this type from the input type.

impl From<IUnknown> for VARIANT

fn from(value: IUnknown) -> Self

Converts to this type from the input type.

impl From<bool> for VARIANT

fn from(value: bool) -> Self

Converts to this type from the input type.

impl From<f32> for VARIANT

fn from(value: f32) -> Self

Converts to this type from the input type.

impl From<f64> for VARIANT

fn from(value: f64) -> Self

Converts to this type from the input type.

impl From<i16> for VARIANT

fn from(value: i16) -> Self

Converts to this type from the input type.

impl From<i32> for VARIANT

fn from(value: i32) -> Self

Converts to this type from the input type.

impl From<i64> for VARIANT

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<i8> for VARIANT

fn from(value: i8) -> Self

Converts to this type from the input type.

impl From<u16> for VARIANT

fn from(value: u16) -> Self

Converts to this type from the input type.

impl From<u32> for VARIANT

fn from(value: u32) -> Self

Converts to this type from the input type.

impl From<u64> for VARIANT

fn from(value: u64) -> Self

Converts to this type from the input type.

impl From<u8> for VARIANT

fn from(value: u8) -> Self

Converts to this type from the input type.

impl PartialEq for VARIANT

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

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

1.0.0 · source§

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

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

impl TryFrom<&PROPVARIANT> for VARIANT

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &PROPVARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for BSTR

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for IUnknown

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for PROPVARIANT

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for bool

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for f64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for i16

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for i32

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for i64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for u16

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for u32

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl TryFrom<&VARIANT> for u64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(from: &VARIANT) -> Result<Self>

Performs the conversion.

impl Eq for VARIANT

Auto Trait Implementations§

impl RefUnwindSafe for VARIANT

impl !Send for VARIANT

impl !Sync for VARIANT

impl Unpin for VARIANT

impl UnwindSafe for VARIANT

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T
where T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.