Struct Number 

pub struct Number(/* private fields */);

A JSON number value, stored as its original string representation.

Validation is delegated to serde_json’s number parser, so any string accepted here is guaranteed to be a valid JSON number. NaN and infinity are rejected.

Construction

use tjson::Number;

let n: Number = "42".parse().unwrap();
let n: Number = "-3.14".parse().unwrap();
let n: Number = "1e100".parse().unwrap();

assert!(Number::try_from(f64::NAN).is_err());
assert!(Number::try_from(f64::INFINITY).is_err());

Implementations

impl Number

pub fn as_str(&self) -> &str

Returns the number as its string representation.

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

Returns the value as an i64 if it is an integer that fits.

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

Returns the value as a u64 if it is a non-negative integer that fits.

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

Returns the value as an f64.

Returns None only if the string somehow fails to parse as a float, which cannot happen for any Number constructed through the public API. Large integers and high-precision decimals may lose precision in the conversion.

pub fn is_integer(&self) -> bool

Returns true if the number has no fractional or exponent part.

Trait Implementations

impl Clone for Number

fn clone(&self) -> Number

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Number

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

Formats the value using the given formatter.

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

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

Deserialize this value from the given Serde deserializer.

impl Display for Number

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

Formats the value using the given formatter.

impl From<i32> for Number

fn from(value: i32) -> Self

Converts to this type from the input type.

impl From<i64> for Number

fn from(value: i64) -> Self

Converts to this type from the input type.

impl From<u32> for Number

fn from(value: u32) -> Self

Converts to this type from the input type.

impl From<u64> for Number

fn from(value: u64) -> Self

Converts to this type from the input type.

impl FromStr for Number

type Err = InvalidNumber

The associated error which can be returned from parsing.

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

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

impl Hash for Number

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 PartialEq for Number

fn eq(&self, other: &Number) -> 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 Serialize for Number

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

Serialize this value into the given Serde serializer.

impl TryFrom<f64> for Number

type Error = InvalidNumber

The type returned in the event of a conversion error.

fn try_from(value: f64) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Number

impl StructuralPartialEq for Number