Struct jsonbb::ObjectRef

pub struct ObjectRef<'a> { /* private fields */ }

A reference to a JSON object.

Implementations

impl<'a> ObjectRef<'a>

pub fn get(self, key: &str) -> Option<ValueRef<'a>>

Returns the value associated with the given key, or None if the key is not present.

Examples

let json: jsonbb::Value = r#"{"a": 1, "b": 2}"#.parse().unwrap();
let object = json.as_object().unwrap();
assert!(object.get("a").is_some());
assert!(object.get("c").is_none());

pub fn contains_key(self, key: &str) -> bool

Returns true if the object contains a value for the specified key.

Examples

let json: jsonbb::Value = r#"{"a": 1, "b": 2}"#.parse().unwrap();
let object = json.as_object().unwrap();
assert_eq!(object.contains_key("a"), true);
assert_eq!(object.contains_key("c"), false);

pub fn len(self) -> usize

Returns the number of elements in the object.

Examples

let json: jsonbb::Value = r#"{"a": 1, "b": 2}"#.parse().unwrap();
let object = json.as_object().unwrap();
assert_eq!(object.len(), 2);

pub fn is_empty(self) -> bool

Returns true if the object contains no elements.

Examples

let json: jsonbb::Value = r#"{"a": 1, "b": 2}"#.parse().unwrap();
let object = json.as_object().unwrap();
assert_eq!(object.is_empty(), false);

pub fn iter(self) -> impl ExactSizeIterator<Item = (&'a str, ValueRef<'a>)>

Returns an iterator over the object’s key-value pairs.

Examples

let json: jsonbb::Value = r#"{"b": 2, "a": 1}"#.parse().unwrap();
let kvs: Vec<_> = json.as_object().unwrap().iter().map(|(k, v)| (k, v.as_u64().unwrap())).collect();
assert_eq!(kvs, [("a", 1), ("b", 2)]);

pub fn keys(self) -> impl ExactSizeIterator<Item = &'a str>

Returns an iterator over the object’s keys.

Examples

let json: jsonbb::Value = r#"{"b": 2, "a": 1}"#.parse().unwrap();
let keys: Vec<_> = json.as_object().unwrap().keys().collect();
assert_eq!(keys, ["a", "b"]);

pub fn values(self) -> impl ExactSizeIterator<Item = ValueRef<'a>>

Returns an iterator over the object’s values.

Examples

let json: jsonbb::Value = r#"{"b": 2, "a": 1}"#.parse().unwrap();
let values: Vec<_> = json.as_object().unwrap().values().map(|v| v.as_u64().unwrap()).collect();
assert_eq!(values, [1, 2]);

Trait Implementations

impl<'a> Clone for ObjectRef<'a>

fn clone(&self) -> ObjectRef<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ObjectRef<'_>

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

Formats the value using the given formatter.

impl Display for ObjectRef<'_>

Display a JSON object as a string.

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

Formats the value using the given formatter.

impl Hash for ObjectRef<'_>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ObjectRef<'_>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ObjectRef<'_>

fn eq(&self, other: &Self) -> 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 PartialOrd for ObjectRef<'_>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for ObjectRef<'_>

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> Copy for ObjectRef<'a>

impl Eq for ObjectRef<'_>