Module value 

The values Tango devices exchange: a Value is a Buf of any element type and dimensions Tango has, and what the arguments and results of handlers convert from and into.

Structs

DevEncoded

A value of an encoded attribute or command: octets, and the name of the format they are in, which is how a device sends what Tango has no type for, a compressed image above all. Both share the message they were decoded out of.

DevEnum

A value of an enumerated attribute: the index of its label among the labels of the attribute, see crate::dev::AttrConfig::enum_labels.

Enums

AttrDataFormat

The layout of a Tango attribute value.

AttrDataKind

The element type of a Tango attribute value, its layout being an AttrDataFormat.

CommandDataKind

The data kind of a Tango command argument. This is the closed set of types accepted by command_inout, without any layout information (see CommandData).

EncodedPixels

The pixels of an image in one of the raw formats cppTango encodes images in, rows after rows: in the dimensions of an image, the width comes first and varies fastest, the way it does in an image attribute.

Value

Any value a Tango device exchanges, whatever its element type and dimensions: what a backend encodes and decodes, and what the arguments and results of handlers are converted from and into, with From and TryFrom.

ValueFormat

A data in any of the formats Tango has, as many dimensions as it has.

Traits

AttrData

A type an attribute value can be, and what kind and format it is advertised as.

CommandData

A type a command argument or result can be, and what kind it is advertised as.

FromValue

A type a value converts into, failing with an Error when it holds something else: every TryFrom<Value> whose error is one, Value itself included.

IntoValue

A type that converts into a value: every Into<Value>, Value itself included, see FromValue for the way back.

TangoElement

An element type Tango has: which variant of Value holds it, and what kinds it is advertised as, see AttrData and CommandData.

Type Aliases

Image

A two-dimensional array of values, in column-major order, see Buf.

Scalar

A single value, see Buf.

Spectrum

A one-dimensional array of values, see Buf.