Enum Num 

pub enum Num {
    U8(u8),
    U16(u16),
    U32(u32),
    U64(u64),
    U128(u128),
    USize(usize),
    I8(i8),
    I16(i16),
    I32(i32),
    I64(i64),
    I128(i128),
    ISize(isize),
    F32(f32),
    F64(f64),
}

A signed or unsigned numeric value.

Variants

U8(u8)

An 8-bit unsigned integer.

U16(u16)

A 16-bit unsigned integer.

U32(u32)

A 32-bit unsigned integer.

U64(u64)

A 64-bit unsigned integer.

U128(u128)

A 128-bit unsigned integer.

USize(usize)

An unsigned integer of platform width.

I8(i8)

An 8-bit signed integer.

I16(i16)

A 16-bit signed integer.

I32(i32)

A 32-bit signed integer.

I64(i64)

A 64-bit signed integer.

I128(i128)

A 128-bit signed integer.

ISize(isize)

A signed integer of platform width.

F32(f32)

A 32-bit wide float.

F64(f64)

A 64-bit wide float.

Implementations

impl Num

pub fn to_u32(self) -> Option<u32>

Converts self into a u32 if self is an unsigned variant with <= 32 bits.

Example

use figment::value::Num;

let num: Num = 123u8.into();
assert_eq!(num.to_u32(), Some(123));

let num: Num = (u32::max_value() as u64 + 1).into();
assert_eq!(num.to_u32(), None);

pub fn to_u128(self) -> Option<u128>

Converts self into a u128 if self is an unsigned variant.

Example

use figment::value::Num;

let num: Num = 123u8.into();
assert_eq!(num.to_u128(), Some(123));

pub fn to_u128_lossy(self) -> Option<u128>

Converts self into a u128 if it is non-negative, even if self is of a signed variant.

Example

use figment::value::Num;

let num: Num = 123u8.into();
assert_eq!(num.to_u128_lossy(), Some(123));

let num: Num = 123i8.into();
assert_eq!(num.to_u128_lossy(), Some(123));

pub fn to_i128(self) -> Option<i128>

Converts self into an i128 if self is a signed Value::Num variant.

Example

use figment::value::Num;

let num: Num = 123i8.into();
assert_eq!(num.to_i128(), Some(123));

pub fn to_f64(&self) -> Option<f64>

Converts self into an f64 if self is either a Num::F32 or Num::F64.

Example

use figment::value::Num;

let num: Num = 3.0f32.into();
assert_eq!(num.to_f64(), Some(3.0f64));

pub fn to_actual(&self) -> Actual

Converts self into an Actual. All unsigned variants return Actual::Unsigned, signed variants Actual::Signed, and float variants Actual::Float. Values exceeding the bit-width of the target Actual are truncated.

Example

use figment::{value::Num, error::Actual};

assert_eq!(Num::U8(10).to_actual(), Actual::Unsigned(10));
assert_eq!(Num::U64(2380).to_actual(), Actual::Unsigned(2380));

assert_eq!(Num::I8(127).to_actual(), Actual::Signed(127));
assert_eq!(Num::ISize(23923).to_actual(), Actual::Signed(23923));

assert_eq!(Num::F32(2.5).to_actual(), Actual::Float(2.5));
assert_eq!(Num::F64(2.103).to_actual(), Actual::Float(2.103));

Trait Implementations

impl Clone for Num

fn clone(&self) -> Num

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Num

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

Formats the value using the given formatter.

impl<'de> Deserializer<'de> for Num

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>

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_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_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_i32<V>( self, visitor: V, ) -> Result<V::Value, <Self as Deserializer<'de>>::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 as Deserializer<'de>>::Error>

where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i64 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_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_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_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_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_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_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_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_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_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_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_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_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_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 From<Num> for Value

fn from(value: Num) -> Value

Converts to this type from the input type.

impl From<f32> for Num

fn from(value: f32) -> Num

Converts to this type from the input type.

impl From<f64> for Num

fn from(value: f64) -> Num

Converts to this type from the input type.

impl From<i128> for Num

fn from(value: i128) -> Num

Converts to this type from the input type.

impl From<i16> for Num

fn from(value: i16) -> Num

Converts to this type from the input type.

impl From<i32> for Num

fn from(value: i32) -> Num

Converts to this type from the input type.

impl From<i64> for Num

fn from(value: i64) -> Num

Converts to this type from the input type.

impl From<i8> for Num

fn from(value: i8) -> Num

Converts to this type from the input type.

impl From<isize> for Num

fn from(value: isize) -> Num

Converts to this type from the input type.

impl From<u128> for Num

fn from(value: u128) -> Num

Converts to this type from the input type.

impl From<u16> for Num

fn from(value: u16) -> Num

Converts to this type from the input type.

impl From<u32> for Num

fn from(value: u32) -> Num

Converts to this type from the input type.

impl From<u64> for Num

fn from(value: u64) -> Num

Converts to this type from the input type.

impl From<u8> for Num

fn from(value: u8) -> Num

Converts to this type from the input type.

impl From<usize> for Num

fn from(value: usize) -> Num

Converts to this type from the input type.

impl FromStr for Num

type Err = Either<ParseIntError, ParseFloatError>

The associated error which can be returned from parsing.

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

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

impl PartialEq for Num

fn eq(&self, other: &Self) -> 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 Num

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

Serialize this value into the given Serde serializer.

impl Copy for Num

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes

Size for each variant:

• U8: 1 byte
• U16: 3 bytes
• U32: 7 bytes
• U64: 15 bytes
• U128: 31 bytes
• USize: 15 bytes
• I8: 1 byte
• I16: 3 bytes
• I32: 7 bytes
• I64: 15 bytes
• I128: 31 bytes
• ISize: 15 bytes
• F32: 7 bytes
• F64: 15 bytes