Enum JsonValue 

pub enum JsonValue {
    Null,
    Bool(bool),
    Number(f64),
    Str(String),
    Array(Vec<JsonValue>),
    Object(Vec<(String, JsonValue)>),
}

A JSON value that covers all standard JSON types.

Variants

Null

JSON null.

Bool(bool)

JSON boolean.

Number(f64)

JSON number (stored as f64).

Str(String)

JSON string.

Array(Vec<JsonValue>)

JSON array.

Object(Vec<(String, JsonValue)>)

JSON object as ordered key-value pairs.

Implementations

impl JsonValue

pub fn to_json_string(&self) -> String

Serialize this value to a JSON string.

pub fn to_json_pretty(&self, indent: usize) -> String

Serialize to a pretty-printed JSON string with indentation.

pub fn from_str(s: &str) -> Result<Self, String>

Parse a JSON string into a JsonValue.

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

If this is a Number, return its f64 value.

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

If this is a Bool, return its value.

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

If this is a Str, return a reference to the inner string.

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

If this is an Array, return a reference to the inner Vec.

pub fn as_object(&self) -> Option<&Vec<(String, JsonValue)>>

If this is an Object, return a reference to the inner pairs.

pub fn get(&self, key: &str) -> Option<&JsonValue>

Look up a key in an Object. Returns None if not an object or key absent.

pub fn get_index(&self, i: usize) -> Option<&JsonValue>

Index into an Array. Returns None if not an array or index out of bounds.

pub fn get_path(&self, path: &str) -> Option<&JsonValue>

Navigate a dot-separated path like “a.b.c” through nested objects.

pub fn is_null(&self) -> bool

Check if this value is null.

pub fn len(&self) -> usize

Return the number of elements in an array or object, or 0 otherwise.

pub fn is_empty(&self) -> bool

Return true if this value is an empty array, empty object, or null.

pub fn merge(&self, other: &JsonValue) -> JsonValue

Merge two JSON objects. Keys from other override keys in self. Non-object values return other.

pub fn keys(&self) -> Vec<&str>

Return all keys if this is an object.

pub fn values(&self) -> Vec<&JsonValue>

Return all values if this is an object.

Trait Implementations

impl Clone for JsonValue

fn clone(&self) -> JsonValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JsonValue

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

Formats the value using the given formatter.

impl PartialEq for JsonValue

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

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

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 StructuralPartialEq for JsonValue