Enum rmpv::Value

pub enum Value {
    Nil,
    Boolean(bool),
    Integer(Integer),
    F32(f32),
    F64(f64),
    String(Utf8String),
    Binary(Vec<u8>),
    Array(Vec<Value>),
    Map(Vec<(Value, Value)>),
    Ext(i8, Vec<u8>),
}

Represents any valid MessagePack value.

Variants

Nil

Nil represents nil.

Boolean(bool)

Boolean represents true or false.

Integer(Integer)

Integer represents an integer.

A value of an Integer object is limited from -(2^63) upto (2^64)-1.

Examples

use rmpv::Value;

assert_eq!(42, Value::from(42).as_i64().unwrap());

F32(f32)

A 32-bit floating point number.

F64(f64)

A 64-bit floating point number.

String(Utf8String)

String extending Raw type represents a UTF-8 string.

Note

String objects may contain invalid byte sequence and the behavior of a deserializer depends on the actual implementation when it received invalid byte sequence. Deserializers should provide functionality to get the original byte array so that applications can decide how to handle the object

Binary(Vec<u8>)

Binary extending Raw type represents a byte array.

Array(Vec<Value>)

Array represents a sequence of objects.

Map(Vec<(Value, Value)>)

Map represents key-value pairs of objects.

Ext(i8, Vec<u8>)

Extended implements Extension interface: represents a tuple of type information and a byte array where type information is an integer whose meaning is defined by applications.

Methods

impl Value

pub fn as_ref(&self) -> ValueRef

Converts the current owned Value to a ValueRef.

Panics

Panics in unable to allocate memory to keep all internal structures and buffers.

Examples

use rmpv::{Value, ValueRef};

let val = Value::Array(vec![
    Value::Nil,
    Value::from(42),
    Value::Array(vec![
        Value::String("le message".into())
    ])
]);

let expected = ValueRef::Array(vec![
   ValueRef::Nil,
   ValueRef::from(42),
   ValueRef::Array(vec![
       ValueRef::from("le message"),
   ])
]);

assert_eq!(expected, val.as_ref());

pub fn is_nil(&self) -> bool

Returns true if the Value is a Null. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::Nil.is_nil());

pub fn is_bool(&self) -> bool

Returns true if the Value is a Boolean. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::Boolean(true).is_bool());

assert!(!Value::Nil.is_bool());

pub fn is_i64(&self) -> bool

Returns true if the Value is convertible to an i64. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::from(42).is_i64());

assert!(!Value::from(42.0).is_i64());

pub fn is_u64(&self) -> bool

Returns true if the Value is convertible to an u64. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::from(42).is_u64());

assert!(!Value::F32(42.0).is_u64());
assert!(!Value::F64(42.0).is_u64());

pub fn is_f32(&self) -> bool

Returns true if (and only if) the Value is a f32. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::F32(42.0).is_f32());

assert!(!Value::from(42).is_f32());
assert!(!Value::F64(42.0).is_f32());

pub fn is_f64(&self) -> bool

Returns true if (and only if) the Value is a f64. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::F64(42.0).is_f64());

assert!(!Value::from(42).is_f64());
assert!(!Value::F32(42.0).is_f64());

pub fn is_number(&self) -> bool

Returns true if the Value is a Number. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::from(42).is_number());
assert!(Value::F32(42.0).is_number());
assert!(Value::F64(42.0).is_number());

assert!(!Value::Nil.is_number());

pub fn is_str(&self) -> bool

Returns true if the Value is a String. Returns false otherwise.

Examples

use rmpv::Value;

assert!(Value::String("value".into()).is_str());

assert!(!Value::Nil.is_str());

pub fn is_bin(&self) -> bool

Returns true if the Value is a Binary. Returns false otherwise.

pub fn is_array(&self) -> bool

Returns true if the Value is an Array. Returns false otherwise.

pub fn is_map(&self) -> bool

Returns true if the Value is a Map. Returns false otherwise.

pub fn is_ext(&self) -> bool

Returns true if the Value is an Ext. Returns false otherwise.

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

If the Value is a Boolean, returns the associated bool. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some(true), Value::Boolean(true).as_bool());

assert_eq!(None, Value::Nil.as_bool());

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

If the Value is an integer, return or cast it to a i64. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some(42i64), Value::from(42).as_i64());

assert_eq!(None, Value::F64(42.0).as_i64());

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

If the Value is an integer, return or cast it to a u64. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some(42u64), Value::from(42).as_u64());

assert_eq!(None, Value::from(-42).as_u64());
assert_eq!(None, Value::F64(42.0).as_u64());

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

If the Value is a number, return or cast it to a f64. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some(42.0), Value::from(42).as_f64());
assert_eq!(Some(42.0), Value::F32(42.0f32).as_f64());
assert_eq!(Some(42.0), Value::F64(42.0f64).as_f64());

assert_eq!(Some(2147483647.0), Value::from(i32::max_value() as i64).as_f64());

assert_eq!(None, Value::Nil.as_f64());

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

If the Value is a String, returns the associated str. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some("le message"), Value::String("le message".into()).as_str());

assert_eq!(None, Value::Boolean(true).as_str());

pub fn as_slice(&self) -> Option<&[u8]>

If the Value is a Binary or a String, returns the associated slice. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some(&[1, 2, 3, 4, 5][..]), Value::Binary(vec![1, 2, 3, 4, 5]).as_slice());

assert_eq!(None, Value::Boolean(true).as_slice());

pub fn as_array(&self) -> Option<&Vec<Value>>

If the Value is an Array, returns the associated vector. Returns None otherwise.

Examples

use rmpv::Value;

let val = Value::Array(vec![Value::Nil, Value::Boolean(true)]);

assert_eq!(Some(&vec![Value::Nil, Value::Boolean(true)]), val.as_array());

assert_eq!(None, Value::Nil.as_array());

pub fn as_map(&self) -> Option<&Vec<(Value, Value)>>

If the Value is a Map, returns the associated vector of key-value tuples. Returns None otherwise.

Note

MessagePack represents map as a vector of key-value tuples.

Examples

use rmpv::Value;

let val = Value::Map(vec![(Value::Nil, Value::Boolean(true))]);

assert_eq!(Some(&vec![(Value::Nil, Value::Boolean(true))]), val.as_map());

assert_eq!(None, Value::Nil.as_map());

pub fn as_ext(&self) -> Option<(i8, &[u8])>

If the Value is an Ext, returns the associated tuple with a ty and slice. Returns None otherwise.

Examples

use rmpv::Value;

assert_eq!(Some((42, &[1, 2, 3, 4, 5][..])), Value::Ext(42, vec![1, 2, 3, 4, 5]).as_ext());

assert_eq!(None, Value::Boolean(true).as_ext());

Trait Implementations

impl From<bool> for Value

fn from(v: bool) -> Self

Performs the conversion.

impl From<u8> for Value

fn from(v: u8) -> 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<usize> for Value

fn from(v: usize) -> Self

Performs the conversion.

impl From<i8> for Value

fn from(v: i8) -> 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<isize> for Value

fn from(v: isize) -> 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<String> for Value

fn from(v: String) -> Self

Performs the conversion.

impl<'a> From<&'a str> for Value

fn from(v: &str) -> Self

Performs the conversion.

impl<'a> From<Cow<'a, str>> for Value

fn from(v: Cow<'a, str>) -> Self

Performs the conversion.

impl From<Vec<u8>> for Value

fn from(v: Vec<u8>) -> Self

Performs the conversion.

impl<'a> From<&'a [u8]> for Value

fn from(v: &[u8]) -> Self

Performs the conversion.

impl<'a> From<Cow<'a, [u8]>> for Value

fn from(v: Cow<'a, [u8]>) -> Self

Performs the conversion.

impl From<Vec<Value>> for Value

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

Performs the conversion.

impl From<Vec<(Value, Value)>> for Value

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

Performs the conversion.

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 PartialEq<Value> for Value

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Display for Value

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

Formats the value using the given formatter.

impl Debug for Value

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

Formats the value using the given formatter.

impl Index<usize> for Value

type Output = Value

The returned type after indexing.

fn index(&self, index: usize) -> &Value

Performs the indexing (container[index]) operation.