Struct serde_yaml::Number

[+] Show declaration

pub struct Number { /* fields omitted */ }

[−] Expand description

Represents a YAML number, whether integer or floating point.

Methods

impl Number

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pub fn is_i64(&self) -> bool

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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 = yaml(r#"
a: 64
b: 9223372036854775817
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());

pub fn is_u64(&self) -> bool

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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 = yaml(r#"
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());

pub fn is_f64(&self) -> bool

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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 = yaml(r#"
---
a: 256.0
b: 64
c: -64
"#);

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

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

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

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

let big = i64::MAX as u64 + 10;
let v = yaml(r#"
---
a: 64
b: 9223372036854775817
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);

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

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

let v = yaml(r#"
---
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);

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

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

let v = yaml(r#"
---
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));

assert_eq!(yaml("inf").as_f64(), Some(f64::INFINITY));
assert_eq!(yaml("-inf").as_f64(), Some(f64::NEG_INFINITY));
assert!(yaml("NaN").as_f64().unwrap().is_nan());

pub fn is_nan(&self) -> bool

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Returns true if this value is NaN and false otherwise.

assert!(!Number::from(256.0).is_nan());

assert!(Number::from(f64::NAN).is_nan());

assert!(!Number::from(f64::INFINITY).is_nan());

assert!(!Number::from(f64::NEG_INFINITY).is_nan());

assert!(!Number::from(1).is_nan());

pub fn is_infinite(&self) -> bool

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Returns true if this value is positive infinity or negative infinity and false otherwise.

assert!(!Number::from(256.0).is_infinite());

assert!(!Number::from(f64::NAN).is_infinite());

assert!(Number::from(f64::INFINITY).is_infinite());

assert!(Number::from(f64::NEG_INFINITY).is_infinite());

assert!(!Number::from(1).is_infinite());

pub fn is_finite(&self) -> bool

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Returns true if this number is neither infinite nor NaN.

assert!(Number::from(256.0).is_finite());

assert!(!Number::from(f64::NAN).is_finite());

assert!(!Number::from(f64::INFINITY).is_finite());

assert!(!Number::from(f64::NEG_INFINITY).is_finite());

assert!(Number::from(1).is_finite());

Trait Implementations

impl PartialOrd<Number> for Number

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fn partial_cmp(&self, other: &Number) -> Option<Ordering>

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

fn lt(&self, other: &Number) -> bool

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

fn le(&self, other: &Number) -> bool

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

fn gt(&self, other: &Number) -> bool

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

fn ge(&self, other: &Number) -> bool

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

impl PartialEq<Number> for Number

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

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

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

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This method tests for !=.

impl Clone for Number

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fn clone(&self) -> Number

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl From<i8> for Number

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fn from(i: i8) -> Self

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Performs the conversion.

impl From<i16> for Number

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fn from(i: i16) -> Self

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Performs the conversion.

impl From<i32> for Number

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fn from(i: i32) -> Self

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Performs the conversion.

impl From<i64> for Number

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fn from(i: i64) -> Self

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Performs the conversion.

impl From<isize> for Number

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fn from(i: isize) -> Self

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Performs the conversion.

impl From<u8> for Number

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fn from(u: u8) -> Self

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Performs the conversion.

impl From<u16> for Number

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fn from(u: u16) -> Self

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Performs the conversion.

impl From<u32> for Number

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fn from(u: u32) -> Self

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Performs the conversion.

impl From<u64> for Number

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fn from(u: u64) -> Self

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Performs the conversion.

impl From<usize> for Number

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fn from(u: usize) -> Self

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Performs the conversion.

impl From<f32> for Number

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fn from(f: f32) -> Self

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Performs the conversion.

impl From<f64> for Number

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fn from(f: f64) -> Self

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Performs the conversion.

impl Display for Number

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

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Formats the value using the given formatter.

impl Debug for Number

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

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Formats the value using the given formatter.

impl Hash for Number

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fn hash<H: Hasher>(&self, state: &mut H)

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Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

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Feeds a slice of this type into the given [Hasher].

impl Serialize for Number

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

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Serialize this value into the given Serde serializer.

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

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type Error = Error

The error type that can be returned if some error occurs during deserialization.

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

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Require the Deserializer to figure out how to drive the visitor based on what data type is in the input.

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

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Hint that the Deserialize type is expecting a bool value.

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

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Hint that the Deserialize type is expecting an i8 value.

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

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Hint that the Deserialize type is expecting an i16 value.

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

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Hint that the Deserialize type is expecting an i32 value.

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

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Hint that the Deserialize type is expecting an i64 value.

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

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Hint that the Deserialize type is expecting a u8 value.

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

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Hint that the Deserialize type is expecting a u16 value.

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

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Hint that the Deserialize type is expecting a u32 value.

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

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Hint that the Deserialize type is expecting a u64 value.

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

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Hint that the Deserialize type is expecting a f32 value.

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

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Hint that the Deserialize type is expecting a f64 value.

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

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Hint that the Deserialize type is expecting a char value.

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

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Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer.

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

[−]

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer.

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

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Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer.

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

[−]

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer.

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

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Hint that the Deserialize type is expecting an optional value.

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

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Hint that the Deserialize type is expecting a unit value.

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

[−]

Hint that the Deserialize type is expecting a unit struct with a particular name.

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

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Hint that the Deserialize type is expecting a newtype struct with a particular name.

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

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Hint that the Deserialize type is expecting a sequence of values.

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

[−]

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.

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

[−]

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.

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

[−]

Hint that the Deserialize type is expecting a map of key-value pairs.

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

[−]

Hint that the Deserialize type is expecting a struct with a particular name and fields.

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

[−]

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.

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

[−]

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.

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

[−]

Hint that the Deserialize type needs to deserialize a value whose type doesn't matter because it is ignored.

fn deserialize_i128<V>(     self,     visitor: V ) -> Result<<V as Visitor<'de>>::Value, Self::Error> where     V: Visitor<'de>,

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Hint that the Deserialize type is expecting an i128 value.

fn deserialize_u128<V>(     self,     visitor: V ) -> Result<<V as Visitor<'de>>::Value, Self::Error> where     V: Visitor<'de>,

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Hint that the Deserialize type is expecting an u128 value.

fn is_human_readable(&self) -> bool

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Determine whether Deserialize implementations should expect to deserialize their human-readable form.

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

[+]

type Error = Error

The error type that can be returned if some error occurs during deserialization.

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

[−]

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input.

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

[−]

Hint that the Deserialize type is expecting a bool value.

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

[−]

Hint that the Deserialize type is expecting an i8 value.

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

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Hint that the Deserialize type is expecting an i16 value.

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

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Hint that the Deserialize type is expecting an i32 value.

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

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Hint that the Deserialize type is expecting an i64 value.

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

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Hint that the Deserialize type is expecting a u8 value.

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

[−]

Hint that the Deserialize type is expecting a u16 value.

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

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Hint that the Deserialize type is expecting a u32 value.

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

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Hint that the Deserialize type is expecting a u64 value.

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

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Hint that the Deserialize type is expecting a f32 value.

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

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Hint that the Deserialize type is expecting a f64 value.

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

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Hint that the Deserialize type is expecting a char value.

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

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Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer.

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

[−]

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer.

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

[−]

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer.

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

[−]

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer.

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

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Hint that the Deserialize type is expecting an optional value.

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

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Hint that the Deserialize type is expecting a unit value.

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

[−]

Hint that the Deserialize type is expecting a unit struct with a particular name.

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

[−]

Hint that the Deserialize type is expecting a newtype struct with a particular name.

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

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Hint that the Deserialize type is expecting a sequence of values.

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

[−]

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.

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

[−]

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.

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

[−]

Hint that the Deserialize type is expecting a map of key-value pairs.

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

[−]

Hint that the Deserialize type is expecting a struct with a particular name and fields.

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

[−]

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.

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

[−]

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.

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

[−]

Hint that the Deserialize type needs to deserialize a value whose type doesn't matter because it is ignored.

fn deserialize_i128<V>(     self,     visitor: V ) -> Result<<V as Visitor<'de>>::Value, Self::Error> where     V: Visitor<'de>,

[−]

Hint that the Deserialize type is expecting an i128 value.

fn deserialize_u128<V>(     self,     visitor: V ) -> Result<<V as Visitor<'de>>::Value, Self::Error> where     V: Visitor<'de>,

[−]

Hint that the Deserialize type is expecting an u128 value.

fn is_human_readable(&self) -> bool

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Determine whether Deserialize implementations should expect to deserialize their human-readable form.

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

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

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Deserialize this value from the given Serde deserializer.