Trait num_traits::cast::FromPrimitive

pub trait FromPrimitive {
    fn from_i64(n: i64) -> Option<Self>;
    fn from_u64(n: u64) -> Option<Self>;

    fn from_isize(n: isize) -> Option<Self> { ... }
    fn from_i8(n: i8) -> Option<Self> { ... }
    fn from_i16(n: i16) -> Option<Self> { ... }
    fn from_i32(n: i32) -> Option<Self> { ... }
    fn from_usize(n: usize) -> Option<Self> { ... }
    fn from_u8(n: u8) -> Option<Self> { ... }
    fn from_u16(n: u16) -> Option<Self> { ... }
    fn from_u32(n: u32) -> Option<Self> { ... }
    fn from_f32(n: f32) -> Option<Self> { ... }
    fn from_f64(n: f64) -> Option<Self> { ... }
}

A generic trait for converting a number to a value.

Required Methods

fn from_i64(n: i64) -> Option<Self>

Convert an i64 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_u64(n: u64) -> Option<Self>

Convert an u64 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

Provided Methods

fn from_isize(n: isize) -> Option<Self>

Convert an isize to return an optional value of this type. If the value cannot be represented by this value, the None is returned.

fn from_i8(n: i8) -> Option<Self>

Convert an i8 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_i16(n: i16) -> Option<Self>

Convert an i16 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_i32(n: i32) -> Option<Self>

Convert an i32 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_usize(n: usize) -> Option<Self>

Convert a usize to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_u8(n: u8) -> Option<Self>

Convert an u8 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_u16(n: u16) -> Option<Self>

Convert an u16 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_u32(n: u32) -> Option<Self>

Convert an u32 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_f32(n: f32) -> Option<Self>

Convert a f32 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

fn from_f64(n: f64) -> Option<Self>

Convert a f64 to return an optional value of this type. If the type cannot be represented by this value, the None is returned.

Implementations on Foreign Types

impl FromPrimitive for u64

fn from_i8(n: i8) -> Option<u64>

fn from_i16(n: i16) -> Option<u64>

fn from_i32(n: i32) -> Option<u64>

fn from_i64(n: i64) -> Option<u64>

fn from_u8(n: u8) -> Option<u64>

fn from_u16(n: u16) -> Option<u64>

fn from_u32(n: u32) -> Option<u64>

fn from_u64(n: u64) -> Option<u64>

fn from_f32(n: f32) -> Option<u64>

fn from_f64(n: f64) -> Option<u64>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for u8

fn from_i8(n: i8) -> Option<u8>

fn from_i16(n: i16) -> Option<u8>

fn from_i32(n: i32) -> Option<u8>

fn from_i64(n: i64) -> Option<u8>

fn from_u8(n: u8) -> Option<u8>

fn from_u16(n: u16) -> Option<u8>

fn from_u32(n: u32) -> Option<u8>

fn from_u64(n: u64) -> Option<u8>

fn from_f32(n: f32) -> Option<u8>

fn from_f64(n: f64) -> Option<u8>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for u32

fn from_i8(n: i8) -> Option<u32>

fn from_i16(n: i16) -> Option<u32>

fn from_i32(n: i32) -> Option<u32>

fn from_i64(n: i64) -> Option<u32>

fn from_u8(n: u8) -> Option<u32>

fn from_u16(n: u16) -> Option<u32>

fn from_u32(n: u32) -> Option<u32>

fn from_u64(n: u64) -> Option<u32>

fn from_f32(n: f32) -> Option<u32>

fn from_f64(n: f64) -> Option<u32>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for i64

fn from_i8(n: i8) -> Option<i64>

fn from_i16(n: i16) -> Option<i64>

fn from_i32(n: i32) -> Option<i64>

fn from_i64(n: i64) -> Option<i64>

fn from_u8(n: u8) -> Option<i64>

fn from_u16(n: u16) -> Option<i64>

fn from_u32(n: u32) -> Option<i64>

fn from_u64(n: u64) -> Option<i64>

fn from_f32(n: f32) -> Option<i64>

fn from_f64(n: f64) -> Option<i64>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for i32

fn from_i8(n: i8) -> Option<i32>

fn from_i16(n: i16) -> Option<i32>

fn from_i32(n: i32) -> Option<i32>

fn from_i64(n: i64) -> Option<i32>

fn from_u8(n: u8) -> Option<i32>

fn from_u16(n: u16) -> Option<i32>

fn from_u32(n: u32) -> Option<i32>

fn from_u64(n: u64) -> Option<i32>

fn from_f32(n: f32) -> Option<i32>

fn from_f64(n: f64) -> Option<i32>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for f64

fn from_i8(n: i8) -> Option<f64>

fn from_i16(n: i16) -> Option<f64>

fn from_i32(n: i32) -> Option<f64>

fn from_i64(n: i64) -> Option<f64>

fn from_u8(n: u8) -> Option<f64>

fn from_u16(n: u16) -> Option<f64>

fn from_u32(n: u32) -> Option<f64>

fn from_u64(n: u64) -> Option<f64>

fn from_f32(n: f32) -> Option<f64>

fn from_f64(n: f64) -> Option<f64>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for usize

fn from_i8(n: i8) -> Option<usize>

fn from_i16(n: i16) -> Option<usize>

fn from_i32(n: i32) -> Option<usize>

fn from_i64(n: i64) -> Option<usize>

fn from_u8(n: u8) -> Option<usize>

fn from_u16(n: u16) -> Option<usize>

fn from_u32(n: u32) -> Option<usize>

fn from_u64(n: u64) -> Option<usize>

fn from_f32(n: f32) -> Option<usize>

fn from_f64(n: f64) -> Option<usize>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for f32

fn from_i8(n: i8) -> Option<f32>

fn from_i16(n: i16) -> Option<f32>

fn from_i32(n: i32) -> Option<f32>

fn from_i64(n: i64) -> Option<f32>

fn from_u8(n: u8) -> Option<f32>

fn from_u16(n: u16) -> Option<f32>

fn from_u32(n: u32) -> Option<f32>

fn from_u64(n: u64) -> Option<f32>

fn from_f32(n: f32) -> Option<f32>

fn from_f64(n: f64) -> Option<f32>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for i8

fn from_i8(n: i8) -> Option<i8>

fn from_i16(n: i16) -> Option<i8>

fn from_i32(n: i32) -> Option<i8>

fn from_i64(n: i64) -> Option<i8>

fn from_u8(n: u8) -> Option<i8>

fn from_u16(n: u16) -> Option<i8>

fn from_u32(n: u32) -> Option<i8>

fn from_u64(n: u64) -> Option<i8>

fn from_f32(n: f32) -> Option<i8>

fn from_f64(n: f64) -> Option<i8>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for i16

fn from_i8(n: i8) -> Option<i16>

fn from_i16(n: i16) -> Option<i16>

fn from_i32(n: i32) -> Option<i16>

fn from_i64(n: i64) -> Option<i16>

fn from_u8(n: u8) -> Option<i16>

fn from_u16(n: u16) -> Option<i16>

fn from_u32(n: u32) -> Option<i16>

fn from_u64(n: u64) -> Option<i16>

fn from_f32(n: f32) -> Option<i16>

fn from_f64(n: f64) -> Option<i16>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl FromPrimitive for u16

fn from_i8(n: i8) -> Option<u16>

fn from_i16(n: i16) -> Option<u16>

fn from_i32(n: i32) -> Option<u16>

fn from_i64(n: i64) -> Option<u16>

fn from_u8(n: u8) -> Option<u16>

fn from_u16(n: u16) -> Option<u16>

fn from_u32(n: u32) -> Option<u16>

fn from_u64(n: u64) -> Option<u16>

fn from_f32(n: f32) -> Option<u16>

fn from_f64(n: f64) -> Option<u16>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

impl<T> FromPrimitive for Wrapping<T> where
    T: FromPrimitive, 

fn from_u64(n: u64) -> Option<Wrapping<T>>

fn from_i64(n: i64) -> Option<Wrapping<T>>

fn from_isize(n: isize) -> Option<Self>

fn from_i8(n: i8) -> Option<Self>

fn from_i16(n: i16) -> Option<Self>

fn from_i32(n: i32) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

fn from_u8(n: u8) -> Option<Self>

fn from_u16(n: u16) -> Option<Self>

fn from_u32(n: u32) -> Option<Self>

fn from_f32(n: f32) -> Option<Self>

fn from_f64(n: f64) -> Option<Self>

impl FromPrimitive for isize

fn from_i8(n: i8) -> Option<isize>

fn from_i16(n: i16) -> Option<isize>

fn from_i32(n: i32) -> Option<isize>

fn from_i64(n: i64) -> Option<isize>

fn from_u8(n: u8) -> Option<isize>

fn from_u16(n: u16) -> Option<isize>

fn from_u32(n: u32) -> Option<isize>

fn from_u64(n: u64) -> Option<isize>

fn from_f32(n: f32) -> Option<isize>

fn from_f64(n: f64) -> Option<isize>

fn from_isize(n: isize) -> Option<Self>

fn from_usize(n: usize) -> Option<Self>

Implementors