Enum Value 

pub enum Value {
    None,
    Double(f64),
    Long(i64),
    Str(String),
    Enum(u16),
    DoubleArray(Arc<[f64]>),
    LongArray(Arc<[i64]>),
    StrArray(Arc<[String]>),
    Image(Arc<Image>),
}

A PV’s value, reduced to the few shapes a display needs.

Variants

None

No value received yet.

Double(f64)

Long(i64)

Str(String)

Enum(u16)

Index into PvState::labels.

DoubleArray(Arc<[f64]>)

LongArray(Arc<[i64]>)

StrArray(Arc<[String]>)

Image(Arc<Image>)

An areaDetector image (PVA NTNDArray).

Implementations

impl Value

pub fn as_f64(&self) -> Option<f64>

The value as a number, using the first element of an array.

pub fn as_long_string(&self) -> Option<String>

A numeric array as a long string, as Phoebus shows a char waveform whose widget format is string: see long_string.

pub fn is_numeric_array(&self) -> bool

Whether this is an array of numbers, which a long string is held in.

pub fn as_i64(&self) -> Option<i64>

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Default for Value

fn default() -> Value

Returns the “default value” for a type.

impl PartialEq for Value

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Value