pub struct Number { /* private fields */ }
Expand description
Represents a JSON number, whether integer or floating point.
Implementations§
Source§impl Number
impl Number
Sourcepub fn is_i64(&self) -> bool
pub 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.
Sourcepub fn is_u64(&self) -> bool
pub 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.
Sourcepub fn is_f64(&self) -> bool
pub 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.
Sourcepub fn as_i64(&self) -> Option<i64>
pub fn as_i64(&self) -> Option<i64>
If the Number
is an integer, represent it as i64 if possible. Returns
None otherwise.
Sourcepub fn as_u64(&self) -> Option<u64>
pub fn as_u64(&self) -> Option<u64>
If the Number
is an integer, represent it as u64 if possible. Returns
None otherwise.
Sourcepub fn as_f64(&self) -> Option<f64>
pub fn as_f64(&self) -> Option<f64>
Represents the number as f64 if possible. Returns None otherwise.
Sourcepub fn from_f64(f: f64) -> Option<Number>
pub 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());
Sourcepub fn as_i128(&self) -> Option<i128>
pub fn as_i128(&self) -> Option<i128>
If the Number
is an integer, represent it as i128 if possible. Returns
None otherwise.
Sourcepub fn as_u128(&self) -> Option<u128>
pub fn as_u128(&self) -> Option<u128>
If the Number
is an integer, represent it as u128 if possible. Returns
None otherwise.
Trait Implementations§
Source§impl<'de> Deserialize<'de> for Number
impl<'de> Deserialize<'de> for Number
Source§fn deserialize<D>(
deserializer: D,
) -> Result<Number, <D as Deserializer<'de>>::Error>where
D: Deserializer<'de>,
fn deserialize<D>(
deserializer: D,
) -> Result<Number, <D as Deserializer<'de>>::Error>where
D: Deserializer<'de>,
Source§impl<'de> Deserializer<'de> for &Number
impl<'de> Deserializer<'de> for &Number
Source§type Error = Error
type Error = Error
Source§fn deserialize_any<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
fn deserialize_any<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
Deserializer
to figure out how to drive the visitor based
on what data type is in the input. Read moreSource§fn deserialize_i8<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
fn deserialize_i8<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
Deserialize
type is expecting an i8
value.Source§fn deserialize_i16<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
Deserialize
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
Deserialize
type is expecting an i32
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, Error>where
V: Visitor<'de>,
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self,
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) -> Result<<V as Visitor<'de>>::Value, Error>where
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self,
visitor: V,
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self,
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) -> Result<<V as Visitor<'de>>::Value, Error>where
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self,
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Deserialize
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self,
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Deserialize
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self,
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self,
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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fn deserialize_byte_buf<V>(
self,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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V: Visitor<'de>,
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self,
name: &'static str,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
V: Visitor<'de>,
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visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
V: Visitor<'de>,
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self,
name: &'static str,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
V: Visitor<'de>,
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
len: usize,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
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len: usize,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
V: Visitor<'de>,
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self,
name: &'static str,
len: usize,
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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fields: &'static [&'static str],
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
V: Visitor<'de>,
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self,
name: &'static str,
fields: &'static [&'static str],
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
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variants: &'static [&'static str],
visitor: V,
) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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self,
name: &'static str,
variants: &'static [&'static str],
visitor: V,
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self,
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) -> Result<<V as Visitor<'de>>::Value, <&Number as Deserializer<'de>>::Error>where
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implementations should expect to
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impl<'de> Deserializer<'de> for Number
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