Enum ros_message :: Value Copy item path

Bool(bool)

Represents bool.

I8(i8)

Represents int8 or byte.

I16(i16)

Represents int16.

I32(i32)

Represents int32.

I64(i64)

Represents int64.

U8(u8)

Represents uint8 or char.

U16(u16)

Represents uint16.

U32(u32)

Represents uint32.

U64(u64)

Represents uint64.

F32(f32)

Represents float32.

F64(f64)

Represents float64.

String(String)

Represents string.

Time(Time)

Represents time.

Duration(Duration)

Represents duration.

Array(Vec<Value>)

Represents some_type[] or some_type[length].

For example: float32[64], geometry_msgs/Point[].

Message(MessageValue)

Represents an embedded message.

Implementations§

impl Value

pub fn as_bool(&self) -> Option<bool>

Returns the content if Value is a bool.

§Examples

assert_eq!(Value::Bool(true).as_bool(), Some(true));
assert_eq!(Value::Bool(false).as_bool(), Some(false));
assert!(Value::U32(12).as_bool().is_none());

pub fn as_i8(&self) -> Option<i8>

Returns the content if Value is an i8.

§Examples

assert_eq!(Value::I8(12).as_i8(), Some(12));
assert!(Value::U32(12).as_i8().is_none());

pub fn as_i16(&self) -> Option<i16>

Returns the content if Value is an i16.

§Examples

assert_eq!(Value::I16(12).as_i16(), Some(12));
assert!(Value::U32(12).as_i16().is_none());

pub fn as_i32(&self) -> Option<i32>

Returns the content if Value is an i32.

§Examples

assert_eq!(Value::I32(12).as_i32(), Some(12));
assert!(Value::U32(12).as_i32().is_none());

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

Returns the content if Value is an i64.

§Examples

assert_eq!(Value::I64(12).as_i64(), Some(12));
assert!(Value::U32(12).as_i64().is_none());

pub fn as_u8(&self) -> Option<u8>

Returns the content if Value is a u8.

§Examples

assert_eq!(Value::U8(12).as_u8(), Some(12));
assert!(Value::U32(12).as_u8().is_none());

pub fn as_u16(&self) -> Option<u16>

Returns the content if Value is a u16.

§Examples

assert_eq!(Value::U16(12).as_u16(), Some(12));
assert!(Value::U32(12).as_u16().is_none());

pub fn as_u32(&self) -> Option<u32>

Returns the content if Value is a u32.

§Examples

assert_eq!(Value::U32(12).as_u32(), Some(12));
assert!(Value::U16(12).as_u32().is_none());

pub fn as_u64(&self) -> Option<u64>

Returns the content if Value is a u64.

§Examples

assert_eq!(Value::U64(12).as_u64(), Some(12));
assert!(Value::U32(12).as_u64().is_none());

pub fn as_f32(&self) -> Option<f32>

Returns the content if Value is an f32.

§Examples

assert_eq!(Value::F32(12.0).as_f32(), Some(12.0));
assert!(Value::U32(12).as_f32().is_none());

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

Returns the content if Value is an f64.

§Examples

assert_eq!(Value::F64(12.0).as_f64(), Some(12.0));
assert!(Value::U32(12).as_f64().is_none());

pub fn as_str(&self) -> Option<&str>

Returns a &str if Value is a String.

§Examples

assert_eq!(Value::String("foo".into()).as_str(), Some("foo"));
assert!(Value::U32(12).as_str().is_none());

pub fn try_into_string(self) -> Option<String>

Returns the content if Value is a String.

§Examples

assert_eq!(Value::String("foo".into()).try_into_string(), Some("foo".into()));
assert!(Value::U32(12).try_into_string().is_none());

pub fn as_time(&self) -> Option<Time>

Returns the content if Value is a Time struct.

§Examples

assert_eq!(
    Value::Time(Time::from_nanos(120)).as_time(),
    Some(Time::from_nanos(120)),
);
assert!(Value::U32(12).as_time().is_none());

pub fn as_duration(&self) -> Option<Duration>

Returns the content if Value is a Duration struct.

§Examples

assert_eq!(
    Value::Duration(Duration::from_nanos(120)).as_duration(),
    Some(Duration::from_nanos(120)),
);
assert!(Value::U32(12).as_duration().is_none());

pub fn as_slice(&self) -> Option<&[Value]>

Returns a reference to the content if Value is an array.

§Examples

assert_eq!(
    Value::Array(vec![1u32.into(), 2u32.into(), 3u32.into()]).as_slice(),
    Some(&[Value::U32(1), Value::U32(2), Value::U32(3)][..]),
);
assert!(Value::U32(12).as_slice().is_none());

pub fn try_into_vec(self) -> Option<Vec<Value>>

Returns the content if Value is an array.

§Examples

assert_eq!(
    Value::Array(vec![1u32.into(), 2u32.into(), 3u32.into()]).try_into_vec(),
    Some(vec![Value::U32(1), Value::U32(2), Value::U32(3)]),
);
assert!(Value::U32(12).try_into_vec().is_none());

pub fn as_map(&self) -> Option<&MessageValue>

Returns a reference to the content if Value is a message.

§Examples

let mut data = HashMap::<String, Value>::new();
data.insert("foo".into(), true.into());
data.insert("bar".into(), false.into());
assert_eq!(Value::Message(data.clone()).as_map(), Some(&data));
assert!(Value::U32(12).as_map().is_none());

pub fn try_into_map(self) -> Option<MessageValue>

Returns the content if Value is a message.

§Examples

let mut data = HashMap::<String, Value>::new();
data.insert("foo".into(), true.into());
data.insert("bar".into(), false.into());
assert_eq!(Value::Message(data.clone()).try_into_map(), Some(data));
assert!(Value::U32(12).try_into_map().is_none());

Trait Implementations§

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for Value

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

Formats the value using the given formatter. Read more

impl<'de> Deserialize<'de> for Value

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

impl Display for Value

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

Formats the value using the given formatter. Read more

impl<T: Into<Value>, const L: usize> From<[T; L]> for Value

fn from(v: [T; L]) -> Self

Converts to this type from the input type.

impl From<Duration> for Value

fn from(v: Duration) -> Self

Converts to this type from the input type.

impl From<HashMap<String, Value>> for Value

fn from(v: HashMap<String, Value>) -> Self

Converts to this type from the input type.

impl From<String> for Value

fn from(v: String) -> Self

Converts to this type from the input type.

impl From<Time> for Value

fn from(v: Time) -> Self

Converts to this type from the input type.

impl<T: Into<Value>> From<Vec<T>> for Value

fn from(v: Vec<T>) -> Self

Converts to this type from the input type.

impl From<bool> for Value

fn from(v: bool) -> Self

Converts to this type from the input type.

impl From<f32> for Value

fn from(v: f32) -> Self

Converts to this type from the input type.

impl From<f64> for Value

fn from(v: f64) -> Self

Converts to this type from the input type.

impl From<i16> for Value

fn from(v: i16) -> Self

Converts to this type from the input type.

impl From<i32> for Value

fn from(v: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Value

fn from(v: i64) -> Self

Converts to this type from the input type.

impl From<i8> for Value

fn from(v: i8) -> Self

Converts to this type from the input type.

impl From<u16> for Value

fn from(v: u16) -> Self

Converts to this type from the input type.

impl From<u32> for Value

fn from(v: u32) -> Self

Converts to this type from the input type.

impl From<u64> for Value

fn from(v: u64) -> Self

Converts to this type from the input type.

impl From<u8> for Value

fn from(v: u8) -> Self

Converts to this type from the input type.

impl<K: Into<String>, T: Into<Value>> FromIterator<(K, T)> for Value

fn from_iter<I: IntoIterator<Item = (K, T)>>(iter: I) -> Self

Creates a value from an iterator. Read more

impl<T: Into<Value>> FromIterator<T> for Value

fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self

Creates a value from an iterator. Read more

impl PartialEq for Value

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 · source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Value

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

Serialize this value into the given Serde serializer. Read more

impl<T: TryFrom<Value>, const L: usize> TryFrom<Value> for [T; L]

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for Duration

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for HashMap<String, Value>

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for String

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for Time

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T: TryFrom<Value>> TryFrom<Value> for Vec<T>

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for bool

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for f32

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for f64

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for i16

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for i32

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for i64

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for i8

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for u16

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for u32

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for u64

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl TryFrom<Value> for u8

type Error = ()

The type returned in the event of a conversion error.

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

Performs the conversion.

impl StructuralPartialEq for Value

Auto Trait Implementations§

impl UnwindSafe for Value

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dst: *mut T)

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

Performs copy-assignment from self to dst. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for T
where T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

impl<T, U> TryInto for T
where U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.