Struct pot::OwnedValue

pub struct OwnedValue(pub Value<'static>);

A Value<'static> wrapper that supports DeserializeOwned.

Because Value<'a> can borrow strings and bytes during deserialization, Value<'static> can’t be used when DeserializeOwned is needed. OwnedValue implements Deserialize by first deserializing a Value<'a> and then using Value::into_static to convert borrowed data to owned data.

Tuple Fields

0: Value<'static>

Methods from Deref<Target = Value<'static>>

pub fn deserialize_as<'de, T: Deserialize<'de>>( &'de self, ) -> Result<T, ValueError>

Attempts to create an instance of T from this value.

use pot::Value;
use serde_derive::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
enum Example {
    Hello,
    World,
}

let original = vec![Example::Hello, Example::World];
let serialized = Value::from_serialize(&original)?;
let deserialized: Vec<Example> = serialized.deserialize_as()?;
assert_eq!(deserialized, original);

pub fn is_empty(&self) -> bool

Returns true if the value contained is considered empty.

// Value::None is always empty.
assert_eq!(Value::None.is_empty(), true);

// All primitive values, including Unit, are always not empty, even if they contain the value 0.
assert_eq!(Value::Unit.is_empty(), false);
assert_eq!(Value::from(false).is_empty(), false);
assert_eq!(Value::from(0_u8).is_empty(), false);
assert_eq!(Value::from(0_f32).is_empty(), false);

// For all other types, having a length of 0 will result in is_empty returning true.
assert_eq!(Value::from(Vec::<u8>::new()).is_empty(), true);
assert_eq!(Value::from(b"").is_empty(), true);
assert_eq!(Value::from(vec![0_u8]).is_empty(), false);

assert_eq!(Value::from("").is_empty(), true);
assert_eq!(Value::from("hi").is_empty(), false);

assert_eq!(Value::Sequence(Vec::new()).is_empty(), true);
assert_eq!(Value::from(vec![Value::None]).is_empty(), false);

assert_eq!(Value::Mappings(Vec::new()).is_empty(), true);
assert_eq!(
    Value::from(vec![(Value::None, Value::None)]).is_empty(),
    false
);

pub fn as_bool(&self) -> bool

Returns the value as a bool.

// Value::None is always false.
assert_eq!(Value::None.as_bool(), false);

// Value::Unit is always true.
assert_eq!(Value::Unit.as_bool(), true);

// Value::Bool will return the contained value
assert_eq!(Value::from(false).as_bool(), false);
assert_eq!(Value::from(true).as_bool(), true);

// All primitive values return true if the value is non-zero.
assert_eq!(Value::from(0_u8).as_bool(), false);
assert_eq!(Value::from(1_u8).as_bool(), true);
assert_eq!(Value::from(0_f32).as_bool(), false);
assert_eq!(Value::from(1_f32).as_bool(), true);

// For all other types, as_bool() returns the result of `!is_empty()`.
assert_eq!(Value::from(Vec::<u8>::new()).as_bool(), false);
assert_eq!(Value::from(b"").as_bool(), false);
assert_eq!(Value::from(vec![0_u8]).as_bool(), true);

assert_eq!(Value::from("").as_bool(), false);
assert_eq!(Value::from("hi").as_bool(), true);

assert_eq!(Value::Sequence(Vec::new()).as_bool(), false);
assert_eq!(Value::from(vec![Value::None]).as_bool(), true);

assert_eq!(Value::Mappings(Vec::new()).as_bool(), false);
assert_eq!(
    Value::from(vec![(Value::None, Value::None)]).as_bool(),
    true
);

pub fn as_integer(&self) -> Option<Integer>

Returns the value as an Integer. Returns None if the value is not a Self::Float or Self::Integer. Also returns None if the value is a float, but cannot be losslessly converted to an integer.

pub fn as_float(&self) -> Option<Float>

Returns the value as an Float. Returns None if the value is not a Self::Float or Self::Integer. Also returns None if the value is an integer, but cannot be losslessly converted to a float.

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

Returns the value as a string, or None if the value is not representable by a string. This will only return a value with variants Self::String and Self::Bytes. Bytes will only be returned if the contained bytes can be safely interpretted as UTF-8.

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

Returns the value as bytes, or None if the value is not stored as a representation of bytes. This will only return a value with variants Self::String and Self::Bytes.

pub fn values(&self) -> ValueIter<'_>

Returns an iterator that iterates over all values contained inside of this value. Returns an empty iterator if not a Self::Sequence or Self::Mappings. If a Self::Mappings, only the value portion of the mapping is returned.

pub fn mappings(&self) -> Iter<'_, (Self, Self)>

Returns an iterator that iterates over all mappings contained inside of this value. Returns an empty iterator if not a Self::Sequence or Self::Mappings. If a Self::Sequence, the key will always be Self::None.

pub fn to_static(&self) -> Value<'static>

Converts self to a 'static lifetime by cloning all data.

Trait Implementations

impl Clone for OwnedValue

fn clone(&self) -> OwnedValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OwnedValue

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

Formats the value using the given formatter.

impl Deref for OwnedValue

type Target = Value<'static>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for OwnedValue

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<'de> Deserialize<'de> for OwnedValue

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

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

fn from(value: &'a Value<'a>) -> Self

Converts to this type from the input type.

impl<'a> From<Value<'a>> for OwnedValue

fn from(value: Value<'a>) -> Self

Converts to this type from the input type.

impl PartialEq for OwnedValue

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

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

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

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

impl Serialize for OwnedValue

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for OwnedValue