Enum crazyflie_lib::Value

pub enum Value {
    U8(u8),
    U16(u16),
    U32(u32),
    U64(u64),
    I8(i8),
    I16(i16),
    I32(i32),
    I64(i64),
    F16(f16),
    F32(f32),
    F64(f64),
}

Typed data value

This enum supports all the data types that can be exchanged with the Crazyflie using the log and param subsystems.

A function allows to convert a [u8] to a Value and the Into<Vec> trait is implemented to convert a Value into a vector of bytes.

The TryFrom trait is implemented for all matching rust primitive type. There is only direct conversion implemented. For example the following is OK:

let v:u32 = Value::U32(42).try_into().unwrap();

However the following will panic:

let v:u32 = Value::U8(42).try_into().unwrap();

Variants

U8(u8)

u8 value

Tuple Fields of U8

0: u8

U16(u16)

u16 value

Tuple Fields of U16

0: u16

U32(u32)

u32 value

Tuple Fields of U32

0: u32

U64(u64)

u64 value

Tuple Fields of U64

0: u64

I8(i8)

i8 value

Tuple Fields of I8

0: i8

I16(i16)

i16 value

Tuple Fields of I16

0: i16

I32(i32)

i32 value

Tuple Fields of I32

0: i32

I64(i64)

i64 value

Tuple Fields of I64

0: i64

F16(f16)

f16 value

Tuple Fields of F16

0: f16

F32(f32)

f32 value

Tuple Fields of F32

0: f32

F64(f64)

f64 value

Tuple Fields of F64

0: f64

Implementations

impl Value

pub fn from_le_bytes(
    bytes: &[u8],
    value_type: ValueType
) -> Result<Value, Error>

Convert a &[u8] slice to a Value. The length of the slice must match the length of the value type, otherwise an error will be returned.

pub fn to_f64_lossy(&self) -> f64

Convert a Value to a f64.

This conversion is lossless in most case but can be lossy if the value is a u64: a f64 cannot accurately store large values of a u64.

pub fn from_f64_lossy(value_type: ValueType, value: f64) -> Value

Make a Value from a f64 and a ValueType

This function allows to construct any type of value from a f64.

The conversion has possibility to be lossy in a couple of cases:

• When making an integer, the value is truncated to the number of bit of the parameter
  • Example: Setting 257 to a u8 variable will set it to the value 1
• Similarly floating point precision will be truncated to the parameter precision. Rounding is undefined.
• Making a floating point outside the range of the parameter is undefined.
• It is not possible to represent accurately a u64 parameter in a f64.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a copy 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 From<Value> for ValueType

fn from(value: Value) -> Self

Performs the conversion.

impl From<Value> for Vec<u8>

fn from(value: Value) -> Self

Performs the conversion.

impl From<f16> for Value

fn from(v: f16) -> Self

Performs the conversion.

impl From<f32> for Value

fn from(v: f32) -> Self

Performs the conversion.

impl From<f64> for Value

fn from(v: f64) -> Self

Performs the conversion.

impl From<i16> for Value

fn from(v: i16) -> Self

Performs the conversion.

impl From<i32> for Value

fn from(v: i32) -> Self

Performs the conversion.

impl From<i64> for Value

fn from(v: i64) -> Self

Performs the conversion.

impl From<i8> for Value

fn from(v: i8) -> Self

Performs the conversion.

impl From<u16> for Value

fn from(v: u16) -> Self

Performs the conversion.

impl From<u32> for Value

fn from(v: u32) -> Self

Performs the conversion.

impl From<u64> for Value

fn from(v: u64) -> Self

Performs the conversion.

impl From<u8> for Value

fn from(v: u8) -> Self

Performs the conversion.

impl TryFrom<Value> for u8

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<u8, Self::Error>

Performs the conversion.

impl TryFrom<Value> for u16

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<u16, Self::Error>

Performs the conversion.

impl TryFrom<Value> for f64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<f64, Self::Error>

Performs the conversion.

impl TryFrom<Value> for u32

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<u32, Self::Error>

Performs the conversion.

impl TryFrom<Value> for u64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<u64, Self::Error>

Performs the conversion.

impl TryFrom<Value> for i8

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<i8, Self::Error>

Performs the conversion.

impl TryFrom<Value> for i16

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<i16, Self::Error>

Performs the conversion.

impl TryFrom<Value> for i32

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<i32, Self::Error>

Performs the conversion.

impl TryFrom<Value> for i64

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<i64, Self::Error>

Performs the conversion.

impl TryFrom<Value> for f16

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<f16, Self::Error>

Performs the conversion.

impl TryFrom<Value> for f32

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: Value) -> Result<f32, Self::Error>

Performs the conversion.

impl Copy for Value