Struct rustwt::Number

pub struct Number { /* fields omitted */ }

Represents a JSON number, whether integer or floating point.

Methods

impl Number

fn is_i64(&self) -> bool

Returns true if the Number is an integer between i64::MIN and i64::MAX.

For any Number on which is_i64 returns true, as_i64 is guaranteed to return the integer value.

let big = i64::MAX as u64 + 10;
let v = json!({ "a": 64, "b": big, "c": 256.0 });

assert!(v["a"].is_i64());

// Greater than i64::MAX.
assert!(!v["b"].is_i64());

// Numbers with a decimal point are not considered integers.
assert!(!v["c"].is_i64());

fn is_u64(&self) -> bool

Returns true if the Number is an integer between zero and u64::MAX.

For any Number on which is_u64 returns true, as_u64 is guaranteed to return the integer value.

let v = json!({ "a": 64, "b": -64, "c": 256.0 });

assert!(v["a"].is_u64());

// Negative integer.
assert!(!v["b"].is_u64());

// Numbers with a decimal point are not considered integers.
assert!(!v["c"].is_u64());

fn is_f64(&self) -> bool

Returns true if the Number can be represented by f64.

For any Number on which is_f64 returns true, as_f64 is guaranteed to return the floating point value.

Currently this function returns true if and only if both is_i64 and is_u64 return false but this is not a guarantee in the future.

let v = json!({ "a": 256.0, "b": 64, "c": -64 });

assert!(v["a"].is_f64());

// Integers.
assert!(!v["b"].is_f64());
assert!(!v["c"].is_f64());

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

If the Number is an integer, represent it as i64 if possible. Returns None otherwise.

let big = i64::MAX as u64 + 10;
let v = json!({ "a": 64, "b": big, "c": 256.0 });

assert_eq!(v["a"].as_i64(), Some(64));
assert_eq!(v["b"].as_i64(), None);
assert_eq!(v["c"].as_i64(), None);

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

If the Number is an integer, represent it as u64 if possible. Returns None otherwise.

let v = json!({ "a": 64, "b": -64, "c": 256.0 });

assert_eq!(v["a"].as_u64(), Some(64));
assert_eq!(v["b"].as_u64(), None);
assert_eq!(v["c"].as_u64(), None);

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

Represents the number as f64 if possible. Returns None otherwise.

let v = json!({ "a": 256.0, "b": 64, "c": -64 });

assert_eq!(v["a"].as_f64(), Some(256.0));
assert_eq!(v["b"].as_f64(), Some(64.0));
assert_eq!(v["c"].as_f64(), Some(-64.0));

fn from_f64(f: f64) -> Option<Number>

Converts a finite f64 to a Number. Infinite or NaN values are not JSON numbers.

assert!(Number::from_f64(256.0).is_some());

assert!(Number::from_f64(f64::NAN).is_none());

Trait Implementations

impl Clone for Number

fn clone(&self) -> Number

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Number

fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl Display for Number

fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq<Number> for Number

fn eq(&self, __arg_0: &Number) -> bool

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

fn ne(&self, __arg_0: &Number) -> bool

This method tests for !=.

impl From<i64> for Number

fn from(i: i64) -> Number

Performs the conversion.

impl From<i32> for Number

fn from(i: i32) -> Number

Performs the conversion.

impl From<u8> for Number

fn from(u: u8) -> Number

Performs the conversion.

impl From<u32> for Number

fn from(u: u32) -> Number

Performs the conversion.

impl From<usize> for Number

fn from(u: usize) -> Number

Performs the conversion.

impl From<u64> for Number

fn from(u: u64) -> Number

Performs the conversion.

impl From<isize> for Number

fn from(i: isize) -> Number

Performs the conversion.

impl From<i8> for Number

fn from(i: i8) -> Number

Performs the conversion.

impl From<i16> for Number

fn from(i: i16) -> Number

Performs the conversion.

impl From<u16> for Number

fn from(u: u16) -> Number

Performs the conversion.

impl<'de> Deserializer<'de> for Number

type Error = Error

fn deserialize_any<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, Error> where
    V: Visitor<'de>, 

fn deserialize_bool<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i8<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i16<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u8<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u16<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_f32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_f64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_char<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_str<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_string<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_bytes<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_byte_buf<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_option<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_unit<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_unit_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_newtype_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_seq<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_tuple<V>(
    self,
    len: usize,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_tuple_struct<V>(
    self,
    name: &'static str,
    len: usize,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_map<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_struct<V>(
    self,
    name: &'static str,
    fields: &'static [&'static str],
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_enum<V>(
    self,
    name: &'static str,
    variants: &'static [&'static str],
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_identifier<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_ignored_any<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

impl<'de, 'a> Deserializer<'de> for &'a Number

type Error = Error

fn deserialize_any<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, Error> where
    V: Visitor<'de>, 

fn deserialize_bool<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i8<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i16<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_i64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u8<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u16<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_u64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_f32<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_f64<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_char<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_str<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_string<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_bytes<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_byte_buf<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_option<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_unit<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_unit_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_newtype_struct<V>(
    self,
    name: &'static str,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_seq<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_tuple<V>(
    self,
    len: usize,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_tuple_struct<V>(
    self,
    name: &'static str,
    len: usize,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_map<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_struct<V>(
    self,
    name: &'static str,
    fields: &'static [&'static str],
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_enum<V>(
    self,
    name: &'static str,
    variants: &'static [&'static str],
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_identifier<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

fn deserialize_ignored_any<V>(
    self,
    visitor: V
) -> Result<<V as Visitor<'de>>::Value, <&'a Number as Deserializer<'de>>::Error> where
    V: Visitor<'de>, 

impl Serialize for Number

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

impl<'de> Deserialize<'de> for Number

fn deserialize<D>(
    deserializer: D
) -> Result<Number, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>,