Struct Decimal

pub struct Decimal {
    pub exponent: i32,
    pub mantissa: i64,
}

Represents a scaled decimal number.

Fields

exponent: i32

mantissa: i64

Implementations

impl Decimal

pub fn new(exponent: i32, mantissa: i64) -> Decimal

pub fn from_string(value: &str) -> Result<Decimal>

pub fn from_float(value: f64) -> Result<Decimal>

pub fn to_string(&self) -> String

If the number is in fact an integer, it is converted as if was of integer type. Otherwise, the number is represented by an integer part and a decimal part separated by a decimal point (‘.’). Each part is a sequence of digits ‘0’ – ‘9’. There must be at least one digit on each side of the decimal point. If the number is negative it is preceded by a minus sign (‘-’). The integer part must not have any leading zeroes.

pub fn to_float(&self) -> f64

Trait Implementations

impl Clone for Decimal

fn clone(&self) -> Decimal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Decimal

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

Formats the value using the given formatter.

impl Default for Decimal

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Decimal

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a, 'de> Deserializer<'de> for &'a mut Decimal

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, Self::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::Error>

where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i16 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u8 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u32 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u64 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a f32 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a f64 value.

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

where V: Visitor<'de>,

Hint that the Deserialize type is expecting a char value.

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

where V: Visitor<'de>,

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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::Error>

where V: Visitor<'de>,

Hint that the Deserialize type is expecting an optional value.

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

where V: Visitor<'de>,

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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::Error>

where V: Visitor<'de>,

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

fn deserialize_tuple<V>( self, len: usize, visitor: V, ) -> Result<V::Value, <Self as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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 as Deserializer<'de>>::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_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>

where V: Visitor<'de>,

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>,

Hint that the Deserialize type is expecting an i64 value.

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

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

impl Display for Decimal

Format the decimal as number with specific number of digits after the decimal point.

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

Formats the value using the given formatter.

impl Hash for Decimal

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 Into<f64> for Decimal

fn into(self) -> f64

Converts this type into the (usually inferred) input type.

impl PartialEq for Decimal

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

Tests for self and other values to be equal, and is used by ==.

const 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<'de> SeqAccess<'de> for Decimal

type Error = Error

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

fn next_element_seed<T>( &mut self, seed: T, ) -> Result<Option<T::Value>, Self::Error>

where T: DeserializeSeed<'de>,

This returns Ok(Some(value)) for the next value in the sequence, or Ok(None) if there are no more remaining items.

fn next_element<T>(&mut self) -> Result<Option<T>, Self::Error>

where T: Deserialize<'de>,

This returns Ok(Some(value)) for the next value in the sequence, or Ok(None) if there are no more remaining items.

fn size_hint(&self) -> Option<usize>

Returns the number of elements remaining in the sequence, if known.

impl Serialize for Decimal

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl SerializeMap for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_key<T>(&mut self, _key: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a map key.

fn serialize_value<T>(&mut self, _value: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a map value.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a map.

fn serialize_entry<K, V>( &mut self, key: &K, value: &V, ) -> Result<(), Self::Error>

where K: Serialize + ?Sized, V: Serialize + ?Sized,

Serialize a map entry consisting of a key and a value.

impl SerializeSeq for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_element<T>(&mut self, _value: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a sequence element.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a sequence.

impl SerializeStruct for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T>( &mut self, _key: &'static str, _value: &T, ) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a struct field.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a struct.

fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>

Indicate that a struct field has been skipped.

impl SerializeStructVariant for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T>( &mut self, _key: &'static str, _value: &T, ) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a struct variant field.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a struct variant.

fn skip_field(&mut self, key: &'static str) -> Result<(), Self::Error>

Indicate that a struct variant field has been skipped.

impl SerializeTuple for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_element<T>(&mut self, _value: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a tuple element.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a tuple.

impl SerializeTupleStruct for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T>(&mut self, _value: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a tuple struct field.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a tuple struct.

impl SerializeTupleVariant for &mut Decimal

type Ok = ()

Must match the Ok type of our Serializer.

type Error = Error

Must match the Error type of our Serializer.

fn serialize_field<T>(&mut self, _value: &T) -> Result<(), Self::Error>

where T: ?Sized + Serialize,

Serialize a tuple variant field.

fn end(self) -> Result<Self::Ok, Self::Error>

Finish serializing a tuple variant.

impl Serializer for &mut Decimal

type Ok = ()

The output type produced by this Serializer during successful serialization. Most serializers that produce text or binary output should set Ok = () and serialize into an io::Write or buffer contained within the Serializer instance. Serializers that build in-memory data structures may be simplified by using Ok to propagate the data structure around.

type Error = Error

The error type when some error occurs during serialization.

type SerializeSeq = &mut Decimal

Type returned from serialize_seq for serializing the content of the sequence.

type SerializeTuple = &mut Decimal

Type returned from serialize_tuple for serializing the content of the tuple.

type SerializeTupleStruct = &mut Decimal

Type returned from serialize_tuple_struct for serializing the content of the tuple struct.

type SerializeTupleVariant = &mut Decimal

Type returned from serialize_tuple_variant for serializing the content of the tuple variant.

type SerializeMap = &mut Decimal

Type returned from serialize_map for serializing the content of the map.

type SerializeStruct = &mut Decimal

Type returned from serialize_struct for serializing the content of the struct.

type SerializeStructVariant = &mut Decimal

Type returned from serialize_struct_variant for serializing the content of the struct variant.

fn serialize_bool(self, _v: bool) -> Result<Self::Ok, Self::Error>

Serialize a bool value.

fn serialize_i8(self, _v: i8) -> Result<Self::Ok, Self::Error>

Serialize an i8 value.

fn serialize_i16(self, _v: i16) -> Result<Self::Ok, Self::Error>

Serialize an i16 value.

fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error>

Serialize an i32 value.

fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error>

Serialize an i64 value.

fn serialize_u8(self, _v: u8) -> Result<Self::Ok, Self::Error>

Serialize a u8 value.

fn serialize_u16(self, _v: u16) -> Result<Self::Ok, Self::Error>

Serialize a u16 value.

fn serialize_u32(self, _v: u32) -> Result<Self::Ok, Self::Error>

Serialize a u32 value.

fn serialize_u64(self, _v: u64) -> Result<Self::Ok, Self::Error>

Serialize a u64 value.

fn serialize_f32(self, _v: f32) -> Result<Self::Ok, Self::Error>

Serialize an f32 value.

fn serialize_f64(self, _v: f64) -> Result<Self::Ok, Self::Error>

Serialize an f64 value.

fn serialize_char(self, _v: char) -> Result<Self::Ok, Self::Error>

Serialize a character.

fn serialize_str(self, _v: &str) -> Result<Self::Ok, Self::Error>

Serialize a &str.

fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error>

Serialize a chunk of raw byte data.

fn serialize_none(self) -> Result<Self::Ok, Self::Error>

Serialize a None value.

fn serialize_some<T>(self, _value: &T) -> Result<Self::Ok, Self::Error>

where T: ?Sized + Serialize,

Serialize a Some(T) value.

fn serialize_unit(self) -> Result<Self::Ok, Self::Error>

Serialize a () value.

fn serialize_unit_struct( self, _name: &'static str, ) -> Result<Self::Ok, Self::Error>

Serialize a unit struct like struct Unit or PhantomData<T>.

fn serialize_unit_variant( self, _name: &'static str, _variant_index: u32, _variant: &'static str, ) -> Result<Self::Ok, Self::Error>

Serialize a unit variant like E::A in enum E { A, B }.

fn serialize_newtype_struct<T>( self, _name: &'static str, _value: &T, ) -> Result<Self::Ok, Self::Error>

where T: ?Sized + Serialize,

Serialize a newtype struct like struct Millimeters(u8).

fn serialize_newtype_variant<T>( self, _name: &'static str, _variant_index: u32, _variant: &'static str, _value: &T, ) -> Result<Self::Ok, Self::Error>

where T: ?Sized + Serialize,

Serialize a newtype variant like E::N in enum E { N(u8) }.

fn serialize_seq( self, _len: Option<usize>, ) -> Result<Self::SerializeSeq, Self::Error>

Begin to serialize a variably sized sequence. This call must be followed by zero or more calls to serialize_element, then a call to end.

fn serialize_tuple( self, _len: usize, ) -> Result<Self::SerializeTuple, Self::Error>

Begin to serialize a statically sized sequence whose length will be known at deserialization time without looking at the serialized data. This call must be followed by zero or more calls to serialize_element, then a call to end.

fn serialize_tuple_struct( self, _name: &'static str, _len: usize, ) -> Result<Self::SerializeTupleStruct, Self::Error>

Begin to serialize a tuple struct like struct Rgb(u8, u8, u8). This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_tuple_variant( self, _name: &'static str, _variant_index: u32, _variant: &'static str, _len: usize, ) -> Result<Self::SerializeTupleVariant, Self::Error>

Begin to serialize a tuple variant like E::T in enum E { T(u8, u8) }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_map( self, _len: Option<usize>, ) -> Result<Self::SerializeMap, Self::Error>

Begin to serialize a map. This call must be followed by zero or more calls to serialize_key and serialize_value, then a call to end.

fn serialize_struct( self, _name: &'static str, _len: usize, ) -> Result<Self::SerializeStruct, Self::Error>

Begin to serialize a struct like struct Rgb { r: u8, g: u8, b: u8 }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_struct_variant( self, _name: &'static str, _variant_index: u32, _variant: &'static str, _len: usize, ) -> Result<Self::SerializeStructVariant, Self::Error>

Begin to serialize a struct variant like E::S in enum E { S { r: u8, g: u8, b: u8 } }. This call must be followed by zero or more calls to serialize_field, then a call to end.

fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error>

Serialize an i128 value.

fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error>

Serialize a u128 value.

fn collect_seq<I>(self, iter: I) -> Result<Self::Ok, Self::Error>

where I: IntoIterator, <I as IntoIterator>::Item: Serialize,

Collect an iterator as a sequence.

fn collect_map<K, V, I>(self, iter: I) -> Result<Self::Ok, Self::Error>

where K: Serialize, V: Serialize, I: IntoIterator<Item = (K, V)>,

Collect an iterator as a map.

fn collect_str<T>(self, value: &T) -> Result<Self::Ok, Self::Error>

where T: Display + ?Sized,

Serialize a string produced by an implementation of Display.

fn is_human_readable(&self) -> bool

Determine whether Serialize implementations should serialize in human-readable form.

impl Eq for Decimal

impl StructuralPartialEq for Decimal