# Enum ethcore_util::standard::Json [−] [src]

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

Represents a json value

## Variants

`I64(i64)``U64(u64)``F64(f64)``String(String)``Boolean(bool)``Array(Vec<Json>)``Object(BTreeMap<String, Json>)``Null`

## Methods

### `impl Json`

#### `fn from_reader(rdr: &mut Read) -> Result<Json, ParserError>`

Decodes a json value from an `&mut io::Read`

#### `fn from_str(s: &str) -> Result<Json, ParserError>`

Decodes a json value from a string

#### `fn pretty(&self) -> PrettyJson`

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

#### `fn find(&'a self, key: &str) -> Option<&'a Json>`

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

#### `fn find_path(&'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.

#### `fn search(&'a self, key: &str) -> Option<&'a 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.

#### `fn is_object(&'a self) -> bool`

Returns true if the Json value is an Object. Returns false otherwise.

#### `fn as_object(&'a self) -> Option<&'a BTreeMap<String, Json>>`

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

#### `fn as_object_mut(&'a mut self) -> Option<&'a mut BTreeMap<String, Json>>`

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

#### `fn is_array(&'a self) -> bool`

Returns true if the Json value is an Array. Returns false otherwise.

#### `fn as_array(&'a self) -> Option<&'a Vec<Json>>`

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

#### `fn as_array_mut(&'a mut self) -> Option<&'a mut Vec<Json>>`

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

#### `fn is_string(&'a self) -> bool`

Returns true if the Json value is a String. Returns false otherwise.

#### `fn as_string(&'a self) -> Option<&'a str>`

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

#### `fn is_number(&self) -> bool`

Returns true if the Json value is a Number. Returns false otherwise.

#### `fn is_i64(&self) -> bool`

Returns true if the Json value is a i64. Returns false otherwise.

#### `fn is_u64(&self) -> bool`

Returns true if the Json value is a u64. Returns false otherwise.

#### `fn is_f64(&self) -> bool`

Returns true if the Json value is a f64. Returns false otherwise.

#### `fn as_i64(&self) -> Option<i64>`

If the Json value is a number, return or cast it to a i64. Returns None otherwise.

#### `fn as_u64(&self) -> Option<u64>`

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

#### `fn as_f64(&self) -> Option<f64>`

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

#### `fn is_boolean(&self) -> bool`

Returns true if the Json value is a Boolean. Returns false otherwise.

#### `fn as_boolean(&self) -> Option<bool>`

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

#### `fn is_null(&self) -> bool`

Returns true if the Json value is a Null. Returns false otherwise.

#### `fn as_null(&self) -> Option<()>`

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

## Trait Implementations

### `impl PartialOrd<Json> for Json`

#### `fn partial_cmp(&self, __arg_0: &Json) -> Option<Ordering>`

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

#### `fn lt(&self, __arg_0: &Json) -> bool`

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

#### `fn le(&self, __arg_0: &Json) -> bool`

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

#### `fn gt(&self, __arg_0: &Json) -> bool`

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

#### `fn ge(&self, __arg_0: &Json) -> bool`

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

### `impl FromStr for Json`

#### `type Err = ParserError`

The associated error which can be returned from parsing.

#### `fn from_str(s: &str) -> Result<Json, ParserError>`

Parses a string `s` to return a value of this type. Read more

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

#### `type Output = Json`

The returned type after indexing

#### `fn index(&self, idx: &str) -> &Json`

The method for the indexing (`container[index]`) operation

### `impl Index<usize> for Json`

#### `type Output = Json`

The returned type after indexing

#### `fn index(&'a self, idx: usize) -> &'a Json`

The method for the indexing (`container[index]`) operation

### `impl Encodable for Json`

#### `fn encode<S>(&self, e: &mut S) -> Result<(), S::Error> where S: Encoder`

### `impl ToJson for Json`

#### `fn to_json(&self) -> Json`

### `impl PartialEq<Json> for Json`

#### `fn eq(&self, __arg_0: &Json) -> bool`

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

#### `fn ne(&self, __arg_0: &Json) -> bool`

This method tests for `!=`.

### `impl Debug for Json`

#### `fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>`

Formats the value using the given formatter.

### `impl Display for Json`

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

Encodes a json value into a string

### `impl Clone for Json`

#### `fn clone(&self) -> Json`

Returns a copy of the value. Read more

#### `fn clone_from(&mut self, source: &Self)`
1.0.0

Performs copy-assignment from `source`. Read more

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