Struct justjson::JsonNumber

pub struct JsonNumber<'a> { /* private fields */ }

A JSON-encoded number.

Implementations

impl<'a> JsonNumber<'a>

pub fn from_json(json: &'a str) -> Result<Self, Error>

Parses json, expecting a single number value.

Errors

Returns ErrorKind::ExpectedString if a non-string value is encountered.

pub fn source(&self) -> &str

Returns the JSON-encoded representation of this number.

pub fn as_f32(&self) -> Option<f32>

Parses the contained value as an f32, if possible.

The JSON parser only validates that the number takes a correct form. If a number cannot be parsed by the underlying routine due to having too many digits, it this function can return None.

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

Parses the contained value as an f64, if possible.

The JSON parser only validates that the number takes a correct form. If a number cannot be parsed by the underlying routine due to having too many digits, it this function can return None.

pub fn parse<T: FromStr>(&self) -> Result<T, T::Err>

Parses the contained value.

impl JsonNumber<'_>

pub fn as_u8(&self) -> Option<u8>

Parses the contained value as an u8 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_u16(&self) -> Option<u16>

Parses the contained value as an u16 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_u32(&self) -> Option<u32>

Parses the contained value as an u32 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

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

Parses the contained value as an u64 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_u128(&self) -> Option<u128>

Parses the contained value as an u128 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_usize(&self) -> Option<usize>

Parses the contained value as an usize if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_i8(&self) -> Option<i8>

Parses the contained value as an i8 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_i16(&self) -> Option<i16>

Parses the contained value as an i16 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_i32(&self) -> Option<i32>

Parses the contained value as an i32 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

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

Parses the contained value as an i64 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_i128(&self) -> Option<i128>

Parses the contained value as an i128 if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

impl JsonNumber<'_>

pub fn as_isize(&self) -> Option<isize>

Parses the contained value as an isize if possible.

If the source number is a floating point number or has a negative sign, this will always return None.

Trait Implementations

impl<'a> Clone for JsonNumber<'a>

fn clone(&self) -> JsonNumber<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for JsonNumber<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for JsonNumber<'a>

fn eq(&self, other: &JsonNumber<'a>) -> bool

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> Eq for JsonNumber<'a>

impl<'a> StructuralEq for JsonNumber<'a>

impl<'a> StructuralPartialEq for JsonNumber<'a>