alloc::fmt::Display - Rust
Description: API documentation for the Rust `Display` trait in crate `alloc`.
Keywords: rust, rustlang, rust-lang, Display

# 1.0.0[−][src]Trait alloc::fmt::Display

    pub trait Display {
        fn fmt(&self, f: &mut Formatter) -> Result<(), Error>;
    }

Format trait for an empty format, `{}`.

`Display` is similar to `Debug`, but `Display` is for user-facing output, and so cannot be derived.

For more information on formatters, see the module-level documentation.

# Examples

Implementing `Display` on a type:

    use std::fmt;

    struct Point {
        x: i32,
        y: i32,
    }

    impl fmt::Display for Point {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "({}, {})", self.x, self.y)
        }
    }

    let origin = Point { x: 0, y: 0 };

    assert_eq!(format!("The origin is: {}", origin), "The origin is: (0, 0)");

Run

## Required methods

### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

Formats the value using the given formatter.

# Examples

    use std::fmt;

    struct Position {
        longitude: f32,
        latitude: f32,
    }

    impl fmt::Display for Position {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "({}, {})", self.longitude, self.latitude)
        }
    }

    assert_eq!("(1.987, 2.983)",
               format!("{}", Position { longitude: 1.987, latitude: 2.983, }));

Run
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## Implementations on Foreign Types

### `impl Display for TryFromIntError`[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for DecodeUtf16Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for EscapeDefault`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroI16`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for Utf8Lossy`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroU128`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroI128`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for EscapeUnicode`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for BorrowError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroU8`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_> Display for Location<'_>`[src]

#### `fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for TryFromSliceError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_, T> Display for Ref<'_, T> where
T: Display + ?Sized,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for Infallible`[src]

#### `fn fmt(&self, &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ParseFloatError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ToUppercase`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroU32`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<T> Display for Wrapping<T> where
T: Display,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroU16`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_, T> Display for RefMut<'_, T> where
T: Display + ?Sized,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroUsize`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for EscapeDefault`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for EscapeDebug`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroI64`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroI32`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ToLowercase`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ParseCharError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ParseIntError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for CharTryFromError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<P> Display for Pin<P> where
P: Display,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for BorrowMutError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_> Display for PanicInfo<'_>`[src]

#### `fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroI8`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroU64`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for NonZeroIsize`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

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## Implementors

### `impl Display for !`[src]

#### `fn fmt(&self, &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for TryReserveError`[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for AllocErr`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for LayoutErr`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for ParseBoolError`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for Utf8Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for FromUtf16Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl Display for FromUtf8Error`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl Display for String`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl Display for bool`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for char`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for f32`[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for f64`[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for i8`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for i16`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for i32`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for i64`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for i128`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for isize`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for str`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for u8`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for u16`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for u32`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for u64`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for u128`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl Display for usize`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_> Display for Arguments<'_>`[src]

#### `fn fmt(&self, fmt: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_, B: ?Sized> Display for Cow<'_, B> where
B: Display + ToOwned<Owned: Display>,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl<'_, T> Display for &'_ T where
T: Display + ?Sized,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'_, T> Display for &'_ mut T where
T: Display + ?Sized,` [src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'a> Display for alloc::str::EscapeDebug<'a>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'a> Display for alloc::str::EscapeDefault<'a>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<'a> Display for alloc::str::EscapeUnicode<'a>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`[src]

### `impl<T: Display + ?Sized> Display for Box<T>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl<T: ?Sized + Display> Display for Rc<T>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

### `impl<T: ?Sized + Display> Display for Arc<T>`[src]

#### `fn fmt(&self, f: &mut Formatter) -> Result`[src]

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