# 1.0.0[−][src]Trait std::convert::From

    pub trait From<T> {
        fn from(T) -> Self;
    }

Simple and safe type conversions in to `Self`. It is the reciprocal of `Into`.

This trait is useful when performing error handling as described by the book and is closely related to the `?` operator.

When constructing a function that is capable of failing the return type will generally be of the form `Result<T, E>`.

The `From` trait allows for simplification of error handling by providing a means of returning a single error type that encapsulates numerous possible erroneous situations.

This trait is not limited to error handling, rather the general case for this trait would be in any type conversions to have an explicit definition of how they are performed.

Note: this trait must not fail. If the conversion can fail, use `TryFrom` or a dedicated method which returns an `Option<T>` or a `Result<T, E>`.

# Generic Implementations

- `From<T> for U` implies `Into<U>``for T`
- `from` is reflexive, which means that `From<T> for T` is implemented

# Examples

`String` implements `From<&str>`:

    let string = "hello".to_string();
    let other_string = String::from("hello");

    assert_eq!(string, other_string);Run

An example usage for error handling:

    use std::fs;
    use std::io;
    use std::num;

    enum CliError {
        IoError(io::Error),
        ParseError(num::ParseIntError),
    }

    impl From<io::Error> for CliError {
        fn from(error: io::Error) -> Self {
            CliError::IoError(error)
        }
    }

    impl From<num::ParseIntError> for CliError {
        fn from(error: num::ParseIntError) -> Self {
            CliError::ParseError(error)
        }
    }

    fn open_and_parse_file(file_name: &str) -> Result<i32, CliError> {
        let mut contents = fs::read_to_string(&file_name)?;
        let num: i32 = contents.trim().parse()?;
        Ok(num)
    }Run

## Required methods

### `fn from(T) -> Self`

Performs the conversion.

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## Implementors

### `impl From<Infallible> for TryFromIntError`[src]

#### `fn from(x: Infallible) -> TryFromIntError`[src]

### `impl From<ErrorKind> for Error`[src]

Intended for use for errors not exposed to the user, where allocating onto the heap (for normal construction via Error::new) is too costly.

#### `fn from(kind: ErrorKind) -> Error`[src]

Converts an `ErrorKind` into an `Error`.

This conversion allocates a new error with a simple representation of error kind.

# Examples

    use std::io::{Error, ErrorKind};

    let not_found = ErrorKind::NotFound;
    let error = Error::from(not_found);
    assert_eq!("entity not found", format!("{}", error));Run

### `impl From<[u16; 8]> for IpAddr`[src]

#### `fn from(segments: [u16; 8]) -> IpAddr`[src]

Creates an `IpAddr::V6` from an eight element 16-bit array.

# Examples

    use std::net::{IpAddr, Ipv6Addr};

    let addr = IpAddr::from([
        525u16, 524u16, 523u16, 522u16,
        521u16, 520u16, 519u16, 518u16,
    ]);
    assert_eq!(
        IpAddr::V6(Ipv6Addr::new(
            0x20d, 0x20c,
            0x20b, 0x20a,
            0x209, 0x208,
            0x207, 0x206
        )),
        addr
    );Run

### `impl From<[u16; 8]> for Ipv6Addr`[src]

#### `fn from(segments: [u16; 8]) -> Ipv6Addr`[src]

### `impl From<[u8; 4]> for IpAddr`[src]

#### `fn from(octets: [u8; 4]) -> IpAddr`[src]

Creates an `IpAddr::V4` from a four element byte array.

# Examples

    use std::net::{IpAddr, Ipv4Addr};

    let addr = IpAddr::from([13u8, 12u8, 11u8, 10u8]);
    assert_eq!(IpAddr::V4(Ipv4Addr::new(13, 12, 11, 10)), addr);Run

### `impl From<[u8; 16]> for IpAddr`[src]

#### `fn from(octets: [u8; 16]) -> IpAddr`[src]

Creates an `IpAddr::V6` from a sixteen element byte array.

# Examples

    use std::net::{IpAddr, Ipv6Addr};

    let addr = IpAddr::from([
        25u8, 24u8, 23u8, 22u8, 21u8, 20u8, 19u8, 18u8,
        17u8, 16u8, 15u8, 14u8, 13u8, 12u8, 11u8, 10u8,
    ]);
    assert_eq!(
        IpAddr::V6(Ipv6Addr::new(
            0x1918, 0x1716,
            0x1514, 0x1312,
            0x1110, 0x0f0e,
            0x0d0c, 0x0b0a
        )),
        addr
    );Run

### `impl From<[u8; 16]> for Ipv6Addr`[src]

#### `fn from(octets: [u8; 16]) -> Ipv6Addr`[src]

### `impl From<[u8; 4]> for Ipv4Addr`[src]

#### `fn from(octets: [u8; 4]) -> Ipv4Addr`[src]

# Examples

    use std::net::Ipv4Addr;

    let addr = Ipv4Addr::from([13u8, 12u8, 11u8, 10u8]);
    assert_eq!(Ipv4Addr::new(13, 12, 11, 10), addr);Run

### `impl From<bool> for i128`[src]

Converts a `bool` to a `i128`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(i128::from(true), 1);
    assert_eq!(i128::from(false), 0);Run

#### `fn from(small: bool) -> i128`[src]

### `impl From<bool> for i16`[src]

Converts a `bool` to a `i16`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(i16::from(true), 1);
    assert_eq!(i16::from(false), 0);Run

#### `fn from(small: bool) -> i16`[src]

### `impl From<bool> for i32`[src]

Converts a `bool` to a `i32`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(i32::from(true), 1);
    assert_eq!(i32::from(false), 0);Run

#### `fn from(small: bool) -> i32`[src]

### `impl From<bool> for i64`[src]

Converts a `bool` to a `i64`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(i64::from(true), 1);
    assert_eq!(i64::from(false), 0);Run

#### `fn from(small: bool) -> i64`[src]

### `impl From<bool> for i8`[src]

Converts a `bool` to a `i8`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(i8::from(true), 1);
    assert_eq!(i8::from(false), 0);Run

#### `fn from(small: bool) -> i8`[src]

### `impl From<bool> for isize`[src]

Converts a `bool` to a `isize`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(isize::from(true), 1);
    assert_eq!(isize::from(false), 0);Run

#### `fn from(small: bool) -> isize`[src]

### `impl From<bool> for u128`[src]

Converts a `bool` to a `u128`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(u128::from(true), 1);
    assert_eq!(u128::from(false), 0);Run

#### `fn from(small: bool) -> u128`[src]

### `impl From<bool> for u16`[src]

Converts a `bool` to a `u16`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(u16::from(true), 1);
    assert_eq!(u16::from(false), 0);Run

#### `fn from(small: bool) -> u16`[src]

### `impl From<bool> for u32`[src]

Converts a `bool` to a `u32`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(u32::from(true), 1);
    assert_eq!(u32::from(false), 0);Run

#### `fn from(small: bool) -> u32`[src]

### `impl From<bool> for u64`[src]

Converts a `bool` to a `u64`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(u64::from(true), 1);
    assert_eq!(u64::from(false), 0);Run

#### `fn from(small: bool) -> u64`[src]

### `impl From<bool> for u8`[src]

Converts a `bool` to a `u8`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(u8::from(true), 1);
    assert_eq!(u8::from(false), 0);Run

#### `fn from(small: bool) -> u8`[src]

### `impl From<bool> for usize`[src]

Converts a `bool` to a `usize`. The resulting value is `0` for `false` and `1` for `true` values.

# Examples

    assert_eq!(usize::from(true), 1);
    assert_eq!(usize::from(false), 0);Run

#### `fn from(small: bool) -> usize`[src]

### `impl From<bool> for AtomicBool`[src]

#### `fn from(b: bool) -> AtomicBool`[src]

Converts a `bool` into an `AtomicBool`.

# Examples

    use std::sync::atomic::AtomicBool;
    let atomic_bool = AtomicBool::from(true);
    assert_eq!(format!("{:?}", atomic_bool), "true")Run

### `impl From<char> for u32`[src]

#### `fn from(c: char) -> u32`[src]

Converts a `char` into a `u32`.

# Examples

    use std::mem;

    fn main() {
        let c = 'c';
        let u = u32::from(c);
        assert!(4 == mem::size_of_val(&u))
    }Run

### `impl From<f32> for f64`[src]

Converts `f32` to `f64` losslessly.

#### `fn from(small: f32) -> f64`[src]

### `impl From<i16> for isize`[src]

Converts `i16` to `isize` losslessly.

#### `fn from(small: i16) -> isize`[src]

### `impl From<i16> for f32`[src]

Converts `i16` to `f32` losslessly.

#### `fn from(small: i16) -> f32`[src]

### `impl From<i16> for f64`[src]

Converts `i16` to `f64` losslessly.

#### `fn from(small: i16) -> f64`[src]

### `impl From<i16> for i128`[src]

Converts `i16` to `i128` losslessly.

#### `fn from(small: i16) -> i128`[src]

### `impl From<i16> for i32`[src]

Converts `i16` to `i32` losslessly.

#### `fn from(small: i16) -> i32`[src]

### `impl From<i16> for i64`[src]

Converts `i16` to `i64` losslessly.

#### `fn from(small: i16) -> i64`[src]

### `impl From<i16> for AtomicI16`[src]

#### `fn from(v: i16) -> AtomicI16`[src]

Converts an `i16` into an `AtomicI16`.

### `impl From<i32> for f64`[src]

Converts `i32` to `f64` losslessly.

#### `fn from(small: i32) -> f64`[src]

### `impl From<i32> for i128`[src]

Converts `i32` to `i128` losslessly.

#### `fn from(small: i32) -> i128`[src]

### `impl From<i32> for i64`[src]

Converts `i32` to `i64` losslessly.

#### `fn from(small: i32) -> i64`[src]

### `impl From<i32> for AtomicI32`[src]

#### `fn from(v: i32) -> AtomicI32`[src]

Converts an `i32` into an `AtomicI32`.

### `impl From<i64> for i128`[src]

Converts `i64` to `i128` losslessly.

#### `fn from(small: i64) -> i128`[src]

### `impl From<i64> for AtomicI64`[src]

#### `fn from(v: i64) -> AtomicI64`[src]

Converts an `i64` into an `AtomicI64`.

### `impl From<i8> for isize`[src]

Converts `i8` to `isize` losslessly.

#### `fn from(small: i8) -> isize`[src]

### `impl From<i8> for f32`[src]

Converts `i8` to `f32` losslessly.

#### `fn from(small: i8) -> f32`[src]

### `impl From<i8> for f64`[src]

Converts `i8` to `f64` losslessly.

#### `fn from(small: i8) -> f64`[src]

### `impl From<i8> for i128`[src]

Converts `i8` to `i128` losslessly.

#### `fn from(small: i8) -> i128`[src]

### `impl From<i8> for i16`[src]

Converts `i8` to `i16` losslessly.

#### `fn from(small: i8) -> i16`[src]

### `impl From<i8> for i32`[src]

Converts `i8` to `i32` losslessly.

#### `fn from(small: i8) -> i32`[src]

### `impl From<i8> for i64`[src]

Converts `i8` to `i64` losslessly.

#### `fn from(small: i8) -> i64`[src]

### `impl From<i8> for AtomicI8`[src]

#### `fn from(v: i8) -> AtomicI8`[src]

Converts an `i8` into an `AtomicI8`.

### `impl From<isize> for AtomicIsize`[src]

#### `fn from(v: isize) -> AtomicIsize`[src]

Converts an `isize` into an `AtomicIsize`.

### `impl From<!> for Infallible`[src]

#### `fn from(x: !) -> Infallible`[src]

### `impl From<!> for TryFromIntError`[src]

#### `fn from(never: !) -> TryFromIntError`[src]

### `impl From<u128> for Ipv6Addr`[src]

#### `fn from(ip: u128) -> Ipv6Addr`[src]

Convert a host byte order `u128` into an `Ipv6Addr`.

# Examples

    use std::net::Ipv6Addr;

    let addr = Ipv6Addr::from(0x102030405060708090A0B0C0D0E0F00D_u128);
    assert_eq!(
        Ipv6Addr::new(
            0x1020, 0x3040, 0x5060, 0x7080,
            0x90A0, 0xB0C0, 0xD0E0, 0xF00D,
        ),
        addr);Run

### `impl From<u16> for usize`[src]

Converts `u16` to `usize` losslessly.

#### `fn from(small: u16) -> usize`[src]

### `impl From<u16> for f32`[src]

Converts `u16` to `f32` losslessly.

#### `fn from(small: u16) -> f32`[src]

### `impl From<u16> for f64`[src]

Converts `u16` to `f64` losslessly.

#### `fn from(small: u16) -> f64`[src]

### `impl From<u16> for i128`[src]

Converts `u16` to `i128` losslessly.

#### `fn from(small: u16) -> i128`[src]

### `impl From<u16> for i32`[src]

Converts `u16` to `i32` losslessly.

#### `fn from(small: u16) -> i32`[src]

### `impl From<u16> for i64`[src]

Converts `u16` to `i64` losslessly.

#### `fn from(small: u16) -> i64`[src]

### `impl From<u16> for u128`[src]

Converts `u16` to `u128` losslessly.

#### `fn from(small: u16) -> u128`[src]

### `impl From<u16> for u32`[src]

Converts `u16` to `u32` losslessly.

#### `fn from(small: u16) -> u32`[src]

### `impl From<u16> for u64`[src]

Converts `u16` to `u64` losslessly.

#### `fn from(small: u16) -> u64`[src]

### `impl From<u16> for AtomicU16`[src]

#### `fn from(v: u16) -> AtomicU16`[src]

Converts an `u16` into an `AtomicU16`.

### `impl From<u32> for f64`[src]

Converts `u32` to `f64` losslessly.

#### `fn from(small: u32) -> f64`[src]

### `impl From<u32> for i128`[src]

Converts `u32` to `i128` losslessly.

#### `fn from(small: u32) -> i128`[src]

### `impl From<u32> for i64`[src]

Converts `u32` to `i64` losslessly.

#### `fn from(small: u32) -> i64`[src]

### `impl From<u32> for u128`[src]

Converts `u32` to `u128` losslessly.

#### `fn from(small: u32) -> u128`[src]

### `impl From<u32> for u64`[src]

Converts `u32` to `u64` losslessly.

#### `fn from(small: u32) -> u64`[src]

### `impl From<u32> for Ipv4Addr`[src]

#### `fn from(ip: u32) -> Ipv4Addr`[src]

Converts a host byte order `u32` into an `Ipv4Addr`.

# Examples

    use std::net::Ipv4Addr;

    let addr = Ipv4Addr::from(0x0d0c0b0au32);
    assert_eq!(Ipv4Addr::new(13, 12, 11, 10), addr);Run

### `impl From<u32> for AtomicU32`[src]

#### `fn from(v: u32) -> AtomicU32`[src]

Converts an `u32` into an `AtomicU32`.

### `impl From<u64> for i128`[src]

Converts `u64` to `i128` losslessly.

#### `fn from(small: u64) -> i128`[src]

### `impl From<u64> for u128`[src]

Converts `u64` to `u128` losslessly.

#### `fn from(small: u64) -> u128`[src]

### `impl From<u64> for AtomicU64`[src]

#### `fn from(v: u64) -> AtomicU64`[src]

Converts an `u64` into an `AtomicU64`.

### `impl From<u8> for isize`[src]

Converts `u8` to `isize` losslessly.

#### `fn from(small: u8) -> isize`[src]

### `impl From<u8> for usize`[src]

Converts `u8` to `usize` losslessly.

#### `fn from(small: u8) -> usize`[src]

### `impl From<u8> for char`[src]

Maps a byte in 0x00...0xFF to a `char` whose code point has the same value, in U+0000 to U+00FF.

Unicode is designed such that this effectively decodes bytes with the character encoding that IANA calls ISO-8859-1. This encoding is compatible with ASCII.

Note that this is different from ISO/IEC 8859-1 a.k.a. ISO 8859-1 (with one less hyphen), which leaves some "blanks", byte values that are not assigned to any character. ISO-8859-1 (the IANA one) assigns them to the C0 and C1 control codes.

Note that this is also different from Windows-1252 a.k.a. code page 1252, which is a superset ISO/IEC 8859-1 that assigns some (not all!) blanks to punctuation and various Latin characters.

To confuse things further, on the Web `ascii`, `iso-8859-1`, and `windows-1252` are all aliases for a superset of Windows-1252 that fills the remaining blanks with corresponding C0 and C1 control codes.

#### `fn from(i: u8) -> char`[src]

Converts a `u8` into a `char`.

# Examples

    use std::mem;

    fn main() {
        let u = 32 as u8;
        let c = char::from(u);
        assert!(4 == mem::size_of_val(&c))
    }Run

### `impl From<u8> for f32`[src]

Converts `u8` to `f32` losslessly.

#### `fn from(small: u8) -> f32`[src]

### `impl From<u8> for f64`[src]

Converts `u8` to `f64` losslessly.

#### `fn from(small: u8) -> f64`[src]

### `impl From<u8> for i128`[src]

Converts `u8` to `i128` losslessly.

#### `fn from(small: u8) -> i128`[src]

### `impl From<u8> for i16`[src]

Converts `u8` to `i16` losslessly.

#### `fn from(small: u8) -> i16`[src]

### `impl From<u8> for i32`[src]

Converts `u8` to `i32` losslessly.

#### `fn from(small: u8) -> i32`[src]

### `impl From<u8> for i64`[src]

Converts `u8` to `i64` losslessly.

#### `fn from(small: u8) -> i64`[src]

### `impl From<u8> for u128`[src]

Converts `u8` to `u128` losslessly.

#### `fn from(small: u8) -> u128`[src]

### `impl From<u8> for u16`[src]

Converts `u8` to `u16` losslessly.

#### `fn from(small: u8) -> u16`[src]

### `impl From<u8> for u32`[src]

Converts `u8` to `u32` losslessly.

#### `fn from(small: u8) -> u32`[src]

### `impl From<u8> for u64`[src]

Converts `u8` to `u64` losslessly.

#### `fn from(small: u8) -> u64`[src]

### `impl From<u8> for AtomicU8`[src]

#### `fn from(v: u8) -> AtomicU8`[src]

Converts an `u8` into an `AtomicU8`.

### `impl From<usize> for AtomicUsize`[src]

#### `fn from(v: usize) -> AtomicUsize`[src]

Converts an `usize` into an `AtomicUsize`.

### `impl From<AllocErr> for CollectionAllocErr`[src]

#### `fn from(AllocErr) -> CollectionAllocErr`[src]

### `impl From<LayoutErr> for CollectionAllocErr`[src]

#### `fn from(LayoutErr) -> CollectionAllocErr`[src]

### `impl From<Box<str>> for Box<[u8]>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: Box<str>) -> Box<[u8]>`[src]

Converts a `Box<str>>` into a `Box<[u8]>`

This conversion does not allocate on the heap and happens in place.

# Examples

    // create a Box<str> which will be used to create a Box<[u8]>
    let boxed: Box<str> = Box::from("hello");
    let boxed_str: Box<[u8]> = Box::from(boxed);

    // create a &[u8] which will be used to create a Box<[u8]>
    let slice: &[u8] = &[104, 101, 108, 108, 111];
    let boxed_slice = Box::from(slice);

    assert_eq!(boxed_slice, boxed_str);Run

### `impl From<Box<str>> for String`[src]

#### `fn from(s: Box<str>) -> String`[src]

Converts the given boxed `str` slice to a `String`. It is notable that the `str` slice is owned.

# Examples

Basic usage:

    let s1: String = String::from("hello world");
    let s2: Box<str> = s1.into_boxed_str();
    let s3: String = String::from(s2);

    assert_eq!("hello world", s3)Run

### `impl From<Box<CStr>> for CString`[src]

#### `fn from(s: Box<CStr>) -> CString`[src]

Converts a `Box``<CStr>` into a `CString` without copying or allocating.

### `impl From<Box<OsStr>> for OsString`[src]

#### `fn from(boxed: Box<OsStr>) -> OsString`[src]

Converts a `Box<OsStr>` into a `OsString` without copying or allocating.

### `impl From<Box<Path>> for PathBuf`[src]

#### `fn from(boxed: Box<Path>) -> PathBuf`[src]

Converts a `Box<Path>` into a `PathBuf`

This conversion does not allocate or copy memory.

### `impl From<CString> for Box<CStr>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: CString) -> Box<CStr>`[src]

Converts a `CString` into a `Box``<CStr>` without copying or allocating.

### `impl From<CString> for Rc<CStr>`[src]

#### `fn from(s: CString) -> Rc<CStr>`[src]

Converts a `CString` into a `Rc``<CStr>` without copying or allocating.

### `impl From<CString> for Arc<CStr>`[src]

#### `fn from(s: CString) -> Arc<CStr>`[src]

Converts a `CString` into a `Arc``<CStr>` without copying or allocating.

### `impl From<CString> for Vec<u8>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: CString) -> Vec<u8>`[src]

Converts a `CString` into a `Vec``<u8>`.

The conversion consumes the `CString`, and removes the terminating NUL byte.

### `impl From<NulError> for Error`[src]

#### `fn from(_: NulError) -> Error`[src]

Converts a `NulError` into a `io::Error`.

### `impl From<OsString> for Box<OsStr>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: OsString) -> Box<OsStr>`[src]

Converts a `OsString` into a `Box``<OsStr>` without copying or allocating.

### `impl From<OsString> for PathBuf`[src]

#### `fn from(s: OsString) -> PathBuf`[src]

Converts a `OsString` into a `PathBuf`

This conversion does not allocate or copy memory.

### `impl From<OsString> for Rc<OsStr>`[src]

#### `fn from(s: OsString) -> Rc<OsStr>`[src]

Converts a `OsString` into a `Rc``<OsStr>` without copying or allocating.

### `impl From<OsString> for Arc<OsStr>`[src]

#### `fn from(s: OsString) -> Arc<OsStr>`[src]

Converts a `OsString` into a `Arc``<OsStr>` without copying or allocating.

### `impl From<File> for Stdio`[src]

#### `fn from(file: File) -> Stdio`[src]

Converts a `File` into a `Stdio`

# Examples

`File` will be converted to `Stdio` using `Stdio::from` under the hood.

    use std::fs::File;
    use std::process::Command;

    // With the `foo.txt` file containing `Hello, world!"
    let file = File::open("foo.txt").unwrap();

    let reverse = Command::new("rev")
        .stdin(file)  // Implicit File conversion into a Stdio
        .output()
        .expect("failed reverse command");

    assert_eq!(reverse.stdout, b"!dlrow ,olleH");Run

### `impl From<Ipv4Addr> for IpAddr`[src]

#### `fn from(ipv4: Ipv4Addr) -> IpAddr`[src]

### `impl From<Ipv4Addr> for u32`[src]

#### `fn from(ip: Ipv4Addr) -> u32`[src]

Converts an `Ipv4Addr` into a host byte order `u32`.

# Examples

    use std::net::Ipv4Addr;

    let addr = Ipv4Addr::new(13, 12, 11, 10);
    assert_eq!(0x0d0c0b0au32, u32::from(addr));Run

### `impl From<Ipv6Addr> for IpAddr`[src]

#### `fn from(ipv6: Ipv6Addr) -> IpAddr`[src]

### `impl From<Ipv6Addr> for u128`[src]

#### `fn from(ip: Ipv6Addr) -> u128`[src]

Convert an `Ipv6Addr` into a host byte order `u128`.

# Examples

    use std::net::Ipv6Addr;

    let addr = Ipv6Addr::new(
        0x1020, 0x3040, 0x5060, 0x7080,
        0x90A0, 0xB0C0, 0xD0E0, 0xF00D,
    );
    assert_eq!(0x102030405060708090A0B0C0D0E0F00D_u128, u128::from(addr));Run

### `impl From<SocketAddrV4> for SocketAddr`[src]

#### `fn from(sock4: SocketAddrV4) -> SocketAddr`[src]

Converts a `SocketAddrV4` into a `SocketAddr::V4`.

### `impl From<SocketAddrV6> for SocketAddr`[src]

#### `fn from(sock6: SocketAddrV6) -> SocketAddr`[src]

Converts a `SocketAddrV6` into a `SocketAddr::V6`.

### `impl From<NonZeroI128> for i128`[src]

#### `fn from(nonzero: NonZeroI128) -> i128`[src]

### `impl From<NonZeroI16> for i16`[src]

#### `fn from(nonzero: NonZeroI16) -> i16`[src]

### `impl From<NonZeroI32> for i32`[src]

#### `fn from(nonzero: NonZeroI32) -> i32`[src]

### `impl From<NonZeroI64> for i64`[src]

#### `fn from(nonzero: NonZeroI64) -> i64`[src]

### `impl From<NonZeroI8> for i8`[src]

#### `fn from(nonzero: NonZeroI8) -> i8`[src]

### `impl From<NonZeroIsize> for isize`[src]

#### `fn from(nonzero: NonZeroIsize) -> isize`[src]

### `impl From<NonZeroU128> for u128`[src]

#### `fn from(nonzero: NonZeroU128) -> u128`[src]

### `impl From<NonZeroU16> for u16`[src]

#### `fn from(nonzero: NonZeroU16) -> u16`[src]

### `impl From<NonZeroU32> for u32`[src]

#### `fn from(nonzero: NonZeroU32) -> u32`[src]

### `impl From<NonZeroU64> for u64`[src]

#### `fn from(nonzero: NonZeroU64) -> u64`[src]

### `impl From<NonZeroU8> for u8`[src]

#### `fn from(nonzero: NonZeroU8) -> u8`[src]

### `impl From<NonZeroUsize> for usize`[src]

#### `fn from(nonzero: NonZeroUsize) -> usize`[src]

### `impl From<PathBuf> for Box<Path>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(p: PathBuf) -> Box<Path>`[src]

Converts a `PathBuf` into a `Box<Path>`

This conversion currently should not allocate memory, but this behavior is not guaranteed on all platforms or in all future versions.

### `impl From<PathBuf> for OsString`[src]

#### `fn from(path_buf: PathBuf) -> OsString`[src]

Converts a `PathBuf` into a `OsString`

This conversion does not allocate or copy memory.

### `impl From<PathBuf> for Rc<Path>`[src]

#### `fn from(s: PathBuf) -> Rc<Path>`[src]

Converts a Path into a Rc by copying the Path data into a new Rc buffer.

### `impl From<PathBuf> for Arc<Path>`[src]

#### `fn from(s: PathBuf) -> Arc<Path>`[src]

Converts a Path into a Rc by copying the Path data into a new Rc buffer.

### `impl From<ChildStderr> for Stdio`[src]

#### `fn from(child: ChildStderr) -> Stdio`[src]

Converts a `ChildStderr` into a `Stdio`

# Examples

    use std::process::{Command, Stdio};

    let reverse = Command::new("rev")
        .arg("non_existing_file.txt")
        .stderr(Stdio::piped())
        .spawn()
        .expect("failed reverse command");

    let cat = Command::new("cat")
        .arg("-")
        .stdin(reverse.stderr.unwrap()) // Converted into a Stdio here
        .output()
        .expect("failed echo command");

    assert_eq!(
        String::from_utf8_lossy(&cat.stdout),
        "rev: cannot open non_existing_file.txt: No such file or directory\n"
    );Run

### `impl From<ChildStdin> for Stdio`[src]

#### `fn from(child: ChildStdin) -> Stdio`[src]

Converts a `ChildStdin` into a `Stdio`

# Examples

`ChildStdin` will be converted to `Stdio` using `Stdio::from` under the hood.

    use std::process::{Command, Stdio};

    let reverse = Command::new("rev")
        .stdin(Stdio::piped())
        .spawn()
        .expect("failed reverse command");

    let _echo = Command::new("echo")
        .arg("Hello, world!")
        .stdout(reverse.stdin.unwrap()) // Converted into a Stdio here
        .output()
        .expect("failed echo command");

    // "!dlrow ,olleH" echoed to consoleRun

### `impl From<ChildStdout> for Stdio`[src]

#### `fn from(child: ChildStdout) -> Stdio`[src]

Converts a `ChildStdout` into a `Stdio`

# Examples

`ChildStdout` will be converted to `Stdio` using `Stdio::from` under the hood.

    use std::process::{Command, Stdio};

    let hello = Command::new("echo")
        .arg("Hello, world!")
        .stdout(Stdio::piped())
        .spawn()
        .expect("failed echo command");

    let reverse = Command::new("rev")
        .stdin(hello.stdout.unwrap())  // Converted into a Stdio here
        .output()
        .expect("failed reverse command");

    assert_eq!(reverse.stdout, b"!dlrow ,olleH\n");Run

### `impl From<String> for Box<str>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: String) -> Box<str>`[src]

Converts the given `String` to a boxed `str` slice that is owned.

# Examples

Basic usage:

    let s1: String = String::from("hello world");
    let s2: Box<str> = Box::from(s1);
    let s3: String = String::from(s2);

    assert_eq!("hello world", s3)Run

### `impl From<String> for Box<dyn Error + Send + Sync>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: String) -> Box<dyn Error + Send + Sync>`[src]

Converts a `String` into a box of dyn `Error` + `Send` + `Sync`.

# Examples

    use std::error::Error;
    use std::mem;

    let a_string_error = "a string error".to_string();
    let a_boxed_error = Box::<Error + Send + Sync>::from(a_string_error);
    assert!(
        mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))Run

### `impl From<String> for Box<dyn Error>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(str_err: String) -> Box<dyn Error>`[src]

Converts a `String` into a box of dyn `Error`.

# Examples

    use std::error::Error;
    use std::mem;

    let a_string_error = "a string error".to_string();
    let a_boxed_error = Box::<Error>::from(a_string_error);
    assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))Run

### `impl From<String> for OsString`[src]

#### `fn from(s: String) -> OsString`[src]

Converts a `String` into a `OsString`.

The conversion copies the data, and includes an allocation on the heap.

### `impl From<String> for PathBuf`[src]

#### `fn from(s: String) -> PathBuf`[src]

Converts a `String` into a `PathBuf`

This conversion does not allocate or copy memory.

### `impl From<String> for Rc<str>`[src]

#### `fn from(v: String) -> Rc<str>`[src]

### `impl From<String> for Arc<str>`[src]

#### `fn from(v: String) -> Arc<str>`[src]

### `impl From<String> for Vec<u8>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(string: String) -> Vec<u8>`[src]

Converts the given `String` to a vector `Vec` that holds values of type `u8`.

# Examples

Basic usage:

    let s1 = String::from("hello world");
    let v1 = Vec::from(s1);

    for b in v1 {
        println!("{}", b);
    }Run

### `impl From<RecvError> for RecvTimeoutError`[src]

#### `fn from(err: RecvError) -> RecvTimeoutError`[src]

### `impl From<RecvError> for TryRecvError`[src]

#### `fn from(err: RecvError) -> TryRecvError`[src]

### `impl<'_> From<&'_ str> for Arc<str>`[src]

#### `fn from(v: &str) -> Arc<str>`[src]

### `impl<'_, T> From<&'_ [T]> for Arc<[T]> where
T: Clone,` [src]

#### `fn from(v: &[T]) -> Arc<[T]>`[src]

### `impl<'a> From<&'a str> for Cow<'a, str>`[src]

#### `fn from(s: &'a str) -> Cow<'a, str>`[src]

### `impl<'a> From<&'a str> for Box<str>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: &'a str) -> Box<str>`[src]

Converts a `&str` into a `Box<str>`

This conversion allocates on the heap and performs a copy of `s`.

# Examples

    let boxed: Box<str> = Box::from("hello");
    println!("{}", boxed);Run

### `impl<'a> From<&'a str> for Box<dyn Error>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: &'a str) -> Box<dyn Error>`[src]

Converts a `str` into a box of dyn `Error`.

# Examples

    use std::error::Error;
    use std::mem;

    let a_str_error = "a str error";
    let a_boxed_error = Box::<Error>::from(a_str_error);
    assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a> From<&'a str> for Rc<str>`[src]

#### `fn from(v: &str) -> Rc<str>`[src]

### `impl<'a> From<&'a str> for String`[src]

#### `fn from(s: &'a str) -> String`[src]

### `impl<'a> From<&'a str> for Vec<u8>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: &'a str) -> Vec<u8>`[src]

### `impl<'a> From<&'a CStr> for Cow<'a, CStr>`[src]

#### `fn from(s: &'a CStr) -> Cow<'a, CStr>`[src]

### `impl<'a> From<&'a CStr> for Box<CStr>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: &'a CStr) -> Box<CStr>`[src]

### `impl<'a> From<&'a CStr> for CString`[src]

#### `fn from(s: &'a CStr) -> CString`[src]

### `impl<'a> From<&'a CStr> for Rc<CStr>`[src]

#### `fn from(s: &CStr) -> Rc<CStr>`[src]

### `impl<'a> From<&'a CStr> for Arc<CStr>`[src]

#### `fn from(s: &CStr) -> Arc<CStr>`[src]

### `impl<'a> From<&'a CString> for Cow<'a, CStr>`[src]

#### `fn from(s: &'a CString) -> Cow<'a, CStr>`[src]

### `impl<'a> From<&'a OsStr> for Cow<'a, OsStr>`[src]

#### `fn from(s: &'a OsStr) -> Cow<'a, OsStr>`[src]

### `impl<'a> From<&'a OsStr> for Box<OsStr>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(s: &'a OsStr) -> Box<OsStr>`[src]

### `impl<'a> From<&'a OsStr> for Rc<OsStr>`[src]

#### `fn from(s: &OsStr) -> Rc<OsStr>`[src]

### `impl<'a> From<&'a OsStr> for Arc<OsStr>`[src]

#### `fn from(s: &OsStr) -> Arc<OsStr>`[src]

### `impl<'a> From<&'a OsString> for Cow<'a, OsStr>`[src]

#### `fn from(s: &'a OsString) -> Cow<'a, OsStr>`[src]

### `impl<'a> From<&'a Path> for Cow<'a, Path>`[src]

#### `fn from(s: &'a Path) -> Cow<'a, Path>`[src]

### `impl<'a> From<&'a Path> for Box<Path>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(path: &'a Path) -> Box<Path>`[src]

### `impl<'a> From<&'a Path> for Rc<Path>`[src]

#### `fn from(s: &Path) -> Rc<Path>`[src]

Converts a Path into a Rc by copying the Path data into a new Rc buffer.

### `impl<'a> From<&'a Path> for Arc<Path>`[src]

#### `fn from(s: &Path) -> Arc<Path>`[src]

Converts a Path into a Rc by copying the Path data into a new Rc buffer.

### `impl<'a> From<&'a PathBuf> for Cow<'a, Path>`[src]

#### `fn from(p: &'a PathBuf) -> Cow<'a, Path>`[src]

### `impl<'a> From<&'a String> for Cow<'a, str>`[src]

#### `fn from(s: &'a String) -> Cow<'a, str>`[src]

### `impl<'a> From<Cow<'a, str>> for Box<dyn Error>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: Cow<'a, str>) -> Box<dyn Error>`[src]

Converts a `Cow` into a box of dyn `Error`.

# Examples

    use std::error::Error;
    use std::mem;
    use std::borrow::Cow;

    let a_cow_str_error = Cow::from("a str error");
    let a_boxed_error = Box::<Error>::from(a_cow_str_error);
    assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a> From<Cow<'a, str>> for String`[src]

#### `fn from(s: Cow<'a, str>) -> String`[src]

### `impl<'a> From<Cow<'a, CStr>> for CString`[src]

#### `fn from(s: Cow<'a, CStr>) -> Self`[src]

### `impl<'a> From<Cow<'a, OsStr>> for OsString`[src]

#### `fn from(s: Cow<'a, OsStr>) -> Self`[src]

### `impl<'a> From<Cow<'a, Path>> for PathBuf`[src]

#### `fn from(p: Cow<'a, Path>) -> Self`[src]

### `impl<'a> From<CString> for Cow<'a, CStr>`[src]

#### `fn from(s: CString) -> Cow<'a, CStr>`[src]

### `impl<'a> From<OsString> for Cow<'a, OsStr>`[src]

#### `fn from(s: OsString) -> Cow<'a, OsStr>`[src]

### `impl<'a> From<PathBuf> for Cow<'a, Path>`[src]

#### `fn from(s: PathBuf) -> Cow<'a, Path>`[src]

### `impl<'a> From<String> for Cow<'a, str>`[src]

#### `fn from(s: String) -> Cow<'a, str>`[src]

### `impl<'a, 'b> From<&'b str> for Box<dyn Error + Send + Sync + 'a>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: &'b str) -> Box<dyn Error + Send + Sync + 'a>`[src]

Converts a `str` into a box of dyn `Error` + `Send` + `Sync`.

# Examples

    use std::error::Error;
    use std::mem;

    let a_str_error = "a str error";
    let a_boxed_error = Box::<Error + Send + Sync>::from(a_str_error);
    assert!(
        mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a, 'b> From<Cow<'b, str>> for Box<dyn Error + Send + Sync + 'a>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: Cow<'b, str>) -> Box<dyn Error + Send + Sync + 'a>`[src]

Converts a `Cow` into a box of dyn `Error` + `Send` + `Sync`.

# Examples

    use std::error::Error;
    use std::mem;
    use std::borrow::Cow;

    let a_cow_str_error = Cow::from("a str error");
    let a_boxed_error = Box::<Error + Send + Sync>::from(a_cow_str_error);
    assert!(
        mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a, E: Error + 'a> From<E> for Box<dyn Error + 'a>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: E) -> Box<dyn Error + 'a>`[src]

Converts a type of `Error` into a box of dyn `Error`.

# Examples

    use std::error::Error;
    use std::fmt;
    use std::mem;

    #[derive(Debug)]
    struct AnError;

    impl fmt::Display for AnError {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            write!(f , "An error")
        }
    }

    impl Error for AnError {
        fn description(&self) -> &str {
            "Description of an error"
        }
    }

    let an_error = AnError;
    assert!(0 == mem::size_of_val(&an_error));
    let a_boxed_error = Box::<Error>::from(an_error);
    assert!(mem::size_of::<Box<dyn Error>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a, E: Error + Send + Sync + 'a> From<E> for Box<dyn Error + Send + Sync + 'a>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(err: E) -> Box<dyn Error + Send + Sync + 'a>`[src]

Converts a type of `Error` + `Send` + `Sync` into a box of dyn `Error` + `Send` + `Sync`.

# Examples

    use std::error::Error;
    use std::fmt;
    use std::mem;

    #[derive(Debug)]
    struct AnError;

    impl fmt::Display for AnError {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            write!(f , "An error")
        }
    }

    impl Error for AnError {
        fn description(&self) -> &str {
            "Description of an error"
        }
    }

    unsafe impl Send for AnError {}

    unsafe impl Sync for AnError {}

    let an_error = AnError;
    assert!(0 == mem::size_of_val(&an_error));
    let a_boxed_error = Box::<Error + Send + Sync>::from(an_error);
    assert!(
        mem::size_of::<Box<dyn Error + Send + Sync>>() == mem::size_of_val(&a_boxed_error))Run

### `impl<'a, T> From<&'a Option<T>> for Option<&'a T>`[src]

#### `fn from(o: &'a Option<T>) -> Option<&'a T>`[src]

### `impl<'a, T> From<&'a Vec<T>> for Cow<'a, [T]> where
T: Clone,` [src]

#### `fn from(v: &'a Vec<T>) -> Cow<'a, [T]>`[src]

### `impl<'a, T> From<&'a mut Option<T>> for Option<&'a mut T>`[src]

#### `fn from(o: &'a mut Option<T>) -> Option<&'a mut T>`[src]

### `impl<'a, T> From<Cow<'a, [T]>> for Vec<T> where
[T]: ToOwned,
<[T] as ToOwned>::Owned == Vec<T>,` [src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: Cow<'a, [T]>) -> Vec<T>`[src]

### `impl<'a, T> From<&'a T> for NonNull<T> where
T: ?Sized,` [src]

#### `fn from(reference: &'a T) -> NonNull<T>`[src]

### `impl<'a, T> From<&'a mut T> for NonNull<T> where
T: ?Sized,` [src]

#### `fn from(reference: &'a mut T) -> NonNull<T>`[src]

### `impl<'a, T> From<&'a [T]> for Cow<'a, [T]> where
T: Clone,` [src]

#### `fn from(s: &'a [T]) -> Cow<'a, [T]>`[src]

### `impl<'a, T> From<&'a [T]> for Box<[T]> where
T: Copy,` [src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(slice: &'a [T]) -> Box<[T]>`[src]

Converts a `&[T]` into a `Box<[T]>`

This conversion allocates on the heap and performs a copy of `slice`.

# Examples

    // create a &[u8] which will be used to create a Box<[u8]>
    let slice: &[u8] = &[104, 101, 108, 108, 111];
    let boxed_slice: Box<[u8]> = Box::from(slice);

    println!("{:?}", boxed_slice);Run

### `impl<'a, T> From<&'a [T]> for Rc<[T]> where
T: Clone,` [src]

#### `fn from(v: &[T]) -> Rc<[T]>`[src]

### `impl<'a, T> From<&'a [T]> for Vec<T> where
T: Clone,` [src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: &'a [T]) -> Vec<T>`[src]

### `impl<'a, T> From<&'a mut [T]> for Vec<T> where
T: Clone,` [src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: &'a mut [T]) -> Vec<T>`[src]

### `impl<'a, T> From<Vec<T>> for Cow<'a, [T]> where
T: Clone,` [src]

#### `fn from(v: Vec<T>) -> Cow<'a, [T]>`[src]

### `impl<'a, T: ?Sized + AsRef<OsStr>> From<&'a T> for OsString`[src]

#### `fn from(s: &'a T) -> OsString`[src]

### `impl<'a, T: ?Sized + AsRef<OsStr>> From<&'a T> for PathBuf`[src]

#### `fn from(s: &'a T) -> PathBuf`[src]

### `impl<I: Into<IpAddr>> From<(I, u16)> for SocketAddr`[src]

#### `fn from(pieces: (I, u16)) -> SocketAddr`[src]

Converts a tuple struct (Into<`IpAddr`>, `u16`) into a `SocketAddr`.

This conversion creates a `SocketAddr::V4` for a `IpAddr::V4` and creates a `SocketAddr::V6` for a `IpAddr::V6`.

`u16` is treated as port of the newly created `SocketAddr`.

### `impl<T> From<*mut T> for AtomicPtr<T>`[src]

#### `fn from(p: *mut T) -> AtomicPtr<T>`[src]

### `impl<T> From<Box<[T]>> for Vec<T>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(s: Box<[T]>) -> Vec<T>`[src]

### `impl<T> From<Box<T>> for Pin<Box<T>> where
T: ?Sized,` [src]

####
ⓘImportant traits for Pin<P>

### Important traits for Pin<P>

`impl<P> Future for Pin<P> where
P: Unpin + DerefMut,
<P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output;`
`fn from(boxed: Box<T>) -> Pin<Box<T>>`[src]

Converts a `Box<T>` into a `Pin<Box<T>>`

This conversion does not allocate on the heap and happens in place.

### `impl<T> From<Box<T>> for Rc<T> where
T: ?Sized,` [src]

#### `fn from(v: Box<T>) -> Rc<T>`[src]

### `impl<T> From<Box<T>> for Arc<T> where
T: ?Sized,` [src]

#### `fn from(v: Box<T>) -> Arc<T>`[src]

### `impl<T> From<BinaryHeap<T>> for Vec<T>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(heap: BinaryHeap<T>) -> Vec<T>`[src]

### `impl<T> From<VecDeque<T>> for Vec<T>`[src]

####
ⓘImportant traits for Vec<u8>

### Important traits for Vec<u8>

`impl Write for Vec<u8>`
`fn from(other: VecDeque<T>) -> Vec<T>`[src]

### `impl<T> From<SendError<T>> for TrySendError<T>`[src]

#### `fn from(err: SendError<T>) -> TrySendError<T>`[src]

### `impl<T> From<PoisonError<T>> for TryLockError<T>`[src]

#### `fn from(err: PoisonError<T>) -> TryLockError<T>`[src]

### `impl<T> From<Vec<T>> for Box<[T]>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(v: Vec<T>) -> Box<[T]>`[src]

### `impl<T> From<Vec<T>> for BinaryHeap<T> where
T: Ord,` [src]

#### `fn from(vec: Vec<T>) -> BinaryHeap<T>`[src]

### `impl<T> From<Vec<T>> for VecDeque<T>`[src]

#### `fn from(other: Vec<T>) -> VecDeque<T>`[src]

### `impl<T> From<Vec<T>> for Rc<[T]>`[src]

#### `fn from(v: Vec<T>) -> Rc<[T]>`[src]

### `impl<T> From<Vec<T>> for Arc<[T]>`[src]

#### `fn from(v: Vec<T>) -> Arc<[T]>`[src]

### `impl<T> From<T> for Option<T>`[src]

#### `fn from(val: T) -> Option<T>`[src]

### `impl<T> From<T> for Poll<T>`[src]

#### `fn from(t: T) -> Poll<T>`[src]

### `impl<T> From<T> for Box<T>`[src]

####
ⓘImportant traits for Box<I>

### Important traits for Box<I>

`impl<I> Iterator for Box<I> where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F> Future for Box<F> where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<R: Read + ?Sized> Read for Box<R>impl<W: Write + ?Sized> Write for Box<W>`
`fn from(t: T) -> Box<T>`[src]

Converts a generic type `T` into a `Box<T>`

The conversion allocates on the heap and moves `t` from the stack into it.

# Examples

    let x = 5;
    let boxed = Box::new(5);

    assert_eq!(Box::from(x), boxed);Run

### `impl<T> From<T> for Cell<T>`[src]

#### `fn from(t: T) -> Cell<T>`[src]

### `impl<T> From<T> for RefCell<T>`[src]

#### `fn from(t: T) -> RefCell<T>`[src]

### `impl<T> From<T> for UnsafeCell<T>`[src]

#### `fn from(t: T) -> UnsafeCell<T>`[src]

### `impl<T> From<T> for Rc<T>`[src]

#### `fn from(t: T) -> Rc<T>`[src]

### `impl<T> From<T> for Arc<T>`[src]

#### `fn from(t: T) -> Arc<T>`[src]

### `impl<T> From<T> for Mutex<T>`[src]

#### `fn from(t: T) -> Self`[src]

Creates a new mutex in an unlocked state ready for use. This is equivalent to `Mutex::new`.

### `impl<T> From<T> for RwLock<T>`[src]

#### `fn from(t: T) -> Self`[src]

Creates a new instance of an `RwLock<T>` which is unlocked. This is equivalent to `RwLock::new`.

### `impl<T> From<T> for T`[src]

#### `fn from(t: T) -> T`[src]

### `impl<T> From<Unique<T>> for NonNull<T> where
T: ?Sized,` [src]

#### `fn from(unique: Unique<T>) -> NonNull<T>`[src]

### `impl<W> From<IntoInnerError<W>> for Error`[src]

#### `fn from(iie: IntoInnerError<W>) -> Error`[src]

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