Struct windows::core::VARIANT

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

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

Implementations

impl VARIANT

pub fn new() -> VARIANT

Create an empty VARIANT.

This function does not allocate memory.

pub const fn is_empty(&self) -> bool

Returns true if the VARIANT is empty.

pub unsafe fn from_raw(raw: VARIANT) -> VARIANT

Creates a VARIANT by taking ownership of the raw data.

Safety

The raw data must be owned by the caller and represent a valid VARIANT data structure.

pub fn as_raw(&self) -> &VARIANT

Returns the underlying raw data for the VARIANT.

Trait Implementations

impl Clone for VARIANT

fn clone(&self) -> VARIANT

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VARIANT

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

Formats the value using the given formatter.

impl Default for VARIANT

fn default() -> VARIANT

Returns the “default value” for a type.

impl Display for VARIANT

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

Formats the value using the given formatter.

impl Drop for VARIANT

fn drop(&mut self)

Executes the destructor for this type.

impl From<&str> for VARIANT

fn from(value: &str) -> VARIANT

Converts to this type from the input type.

impl From<BSTR> for VARIANT

fn from(value: BSTR) -> VARIANT

Converts to this type from the input type.

impl From<IDispatch> for VARIANT

fn from(value: IDispatch) -> Self

Converts to this type from the input type.

impl From<IUnknown> for VARIANT

fn from(value: IUnknown) -> VARIANT

Converts to this type from the input type.

impl From<bool> for VARIANT

fn from(value: bool) -> VARIANT

Converts to this type from the input type.

impl From<f32> for VARIANT

fn from(value: f32) -> VARIANT

Converts to this type from the input type.

impl From<f64> for VARIANT

fn from(value: f64) -> VARIANT

Converts to this type from the input type.

impl From<i16> for VARIANT

fn from(value: i16) -> VARIANT

Converts to this type from the input type.

impl From<i32> for VARIANT

fn from(value: i32) -> VARIANT

Converts to this type from the input type.

impl From<i64> for VARIANT

fn from(value: i64) -> VARIANT

Converts to this type from the input type.

impl From<i8> for VARIANT

fn from(value: i8) -> VARIANT

Converts to this type from the input type.

impl From<u16> for VARIANT

fn from(value: u16) -> VARIANT

Converts to this type from the input type.

impl From<u32> for VARIANT

fn from(value: u32) -> VARIANT

Converts to this type from the input type.

impl From<u64> for VARIANT

fn from(value: u64) -> VARIANT

Converts to this type from the input type.

impl From<u8> for VARIANT

fn from(value: u8) -> VARIANT

Converts to this type from the input type.

impl PartialEq for VARIANT

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

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

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<VARIANT, Error>

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<BSTR, Error>

Performs the conversion.

impl TryFrom<&VARIANT> for IDispatch

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<IUnknown, Error>

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<PROPVARIANT, Error>

Performs the conversion.

impl Eq for VARIANT