Struct Variant 

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

Wrapper for UA_Variant from open62541_sys.

This owns the wrapped data. When the wrapper is dropped, the inner value is cleaned up with UA_clear() to release dynamically allocated memory held by the value.

Implementations

impl Variant

pub fn scalar<T: DataType>(value: T) -> Self

Creates variant from scalar.

pub fn array<T: DataType>(value: Array<T>) -> Self

Creates variant from array.

pub fn with_scalar<T: DataType>(self, value: &T) -> Self

pub fn type_id(&self) -> Option<&NodeId>

Gets data type’s node ID.

Returns None when the variant is empty.

pub fn value_type(&self) -> Option<ValueType>

Gets value type.

Returns None when the variant is empty.

pub fn is_empty(&self) -> bool

pub fn is_scalar(&self) -> bool

pub fn as_scalar<T>(&self) -> Option<&T>

where T: DataType,

pub fn to_scalar<T>(&self) -> Option<T>

where T: DataType,

pub fn into_scalar<T>(self) -> Option<T>

where T: DataType,

pub fn to_array<T: DataType>(&self) -> Option<Array<T>>

pub fn to_value(&self) -> VariantValue

pub fn json(&self) -> Option<Value>

Trait Implementations

impl Clone for Variant

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl DataType for Variant

type Inner = UA_Variant

Inner type.

fn data_type() -> *const UA_DataType

Gets open62541 data type record.

unsafe fn from_raw(src: Self::Inner) -> Self

Creates wrapper by taking ownership of value.

fn into_raw(self) -> Self::Inner

Gives up ownership and returns value.

fn type_name() -> &'static str

Gets data type name.

fn init() -> Self

Creates wrapper initialized with defaults.

fn raw_ref(src: &Self::Inner) -> &Self

Creates wrapper reference from value.

fn raw_mut(src: &mut Self::Inner) -> &mut Self

Creates mutable wrapper reference from value.

fn clone_raw(src: &Self::Inner) -> Self

Creates wrapper by cloning value from src.

fn take_raw(src: &mut Self::Inner) -> Self

Creates wrapper by moving value from src.

fn clone_into_raw(&self, dst: &mut Self::Inner)

Clones value into dst.

fn move_into_raw(self, dst: &mut Self::Inner)

Moves value into dst, giving up ownership.

fn leak_into_raw(self) -> *mut Self::Inner

Leaks wrapped value onto the heap.

unsafe fn to_raw_copy(this: &Self) -> Self::Inner

Creates copy without giving up ownership.

unsafe fn as_ref(&self) -> &Self::Inner

Returns shared reference to value.

unsafe fn as_mut(&mut self) -> &mut Self::Inner

Returns exclusive reference to value.

unsafe fn as_ptr(&self) -> *const Self::Inner

Returns const pointer to value.

unsafe fn as_mut_ptr(&mut self) -> *mut Self::Inner

Returns mutable pointer to value.

fn print(this: &Self) -> Option<String>

Prints value to string.

fn order(this: &Self, other: &Self) -> UA_Order

Compares value to other.

impl Debug for Variant

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

Formats the value using the given formatter.

impl Drop for Variant

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

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

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Eq for Variant

impl Ord for Variant

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Variant

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Variant

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Send for Variant

impl Serialize for Variant

Available on crate feature serde only.

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Sync for Variant