Enum rustc_serialize::json::Json

pub enum Json {
    I64(i64),
    U64(u64),
    F64(f64),
    String(String),
    Boolean(bool),
    Array(Array),
    Object(Object),
    Null,
}

Represents a json value

Variants

I64(i64)

U64(u64)

F64(f64)

String(String)

Boolean(bool)

Array(Array)

Object(Object)

Null

Implementations

impl Json

pub fn pretty(&self) -> PrettyJson<'_>

Borrow this json object as a pretty object to generate a pretty representation for it via Display.

pub fn find(&self, key: &str) -> Option<&Json>

If the Json value is an Object, returns the value associated with the provided key. Otherwise, returns None.

pub fn remove_key(&mut self, key: &str) -> Option<Json>

If the Json value is an Object, deletes the value associated with the provided key from the Object and returns it. Otherwise, returns None.

pub fn find_path<'a>(&'a self, keys: &[&str]) -> Option<&'a Json>

Attempts to get a nested Json Object for each key in keys. If any key is found not to exist, find_path will return None. Otherwise, it will return the Json value associated with the final key.

pub fn search(&self, key: &str) -> Option<&Json>

If the Json value is an Object, performs a depth-first search until a value associated with the provided key is found. If no value is found or the Json value is not an Object, returns None.

pub fn is_object(&self) -> bool

Returns true if the Json value is an Object.

pub fn as_object(&self) -> Option<&Object>

If the Json value is an Object, returns the associated BTreeMap; returns None otherwise.

pub fn is_array(&self) -> bool

Returns true if the Json value is an Array.

pub fn as_array(&self) -> Option<&Array>

If the Json value is an Array, returns the associated vector; returns None otherwise.

pub fn is_string(&self) -> bool

Returns true if the Json value is a String.

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

If the Json value is a String, returns the associated str; returns None otherwise.

pub fn is_number(&self) -> bool

Returns true if the Json value is a Number.

pub fn is_i64(&self) -> bool

Returns true if the Json value is an i64.

pub fn is_u64(&self) -> bool

Returns true if the Json value is a u64.

pub fn is_f64(&self) -> bool

Returns true if the Json value is a f64.

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

If the Json value is a number, returns or cast it to an i64; returns None otherwise.

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

If the Json value is a number, returns or cast it to a u64; returns None otherwise.

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

If the Json value is a number, returns or cast it to a f64; returns None otherwise.

pub fn is_boolean(&self) -> bool

Returns true if the Json value is a Boolean.

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

If the Json value is a Boolean, returns the associated bool; returns None otherwise.

pub fn is_null(&self) -> bool

Returns true if the Json value is a Null.

pub fn as_null(&self) -> Option<()>

If the Json value is a Null, returns (); returns None otherwise.

Trait Implementations

impl Clone for Json

fn clone(&self) -> Json

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Json

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

Formats the value using the given formatter.

impl Display for Json

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

Encodes a json value into a string

impl<E: Encoder> Encodable<E> for Json

fn encode(&self, e: &mut E) -> Result<(), E::Error>

impl FromStr for Json

type Err = BuilderError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Json, BuilderError>

Parses a string s to return a value of this type.

impl<'a> Index<&'a str> for Json

type Output = Json

The returned type after indexing.

fn index(&self, idx: &'a str) -> &Json

Performs the indexing (container[index]) operation.

impl Index<usize> for Json

type Output = Json

The returned type after indexing.

fn index(&self, idx: usize) -> &Json

Performs the indexing (container[index]) operation.

impl PartialEq<Json> for Json

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

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

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

This method tests for !=.

impl PartialOrd<Json> for Json

fn partial_cmp(&self, other: &Json) -> 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 ToJson for Json

fn to_json(&self) -> Json

Converts the value of self to an instance of JSON

impl StructuralPartialEq for Json

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• I64: 15 bytes
• U64: 15 bytes
• F64: 15 bytes
• String: 31 bytes
• Boolean: 1 byte
• Array: 31 bytes
• Object: 31 bytes
• Null: 0 bytes