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Trait std::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.

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)");

Required methods

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, }));

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Implementations on Foreign Types

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Implementors

Write an Ipv6Addr, conforming to the canonical style described by RFC 5952.

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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/fmt/trait.Display.html

Trait std::fmt::Display

Examples

Required methods

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

Examples

Implementations on Foreign Types

impl Display for Utf8Lossy[src]

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

Implementors

impl Display for TryReserveError[src]

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

impl Display for Infallible[src]

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

impl Display for VarError[src]

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

impl Display for IpAddr[src]

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

impl Display for SocketAddr[src]

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

impl Display for RecvTimeoutError[src]

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

impl Display for TryRecvError[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 ![src]

fn fmt(&self, &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 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 TryFromSliceError[src]

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

impl Display for std::ascii::EscapeDefault[src]

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

impl Display for Backtrace[src]

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

impl Display for BorrowError[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 CharTryFromError[src]

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

impl Display for DecodeUtf16Error[src]

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

impl Display for std::char::EscapeDebug[src]

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

impl Display for std::char::EscapeDefault[src]

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

`impl Display for Utf8Lossy`[src]

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

`impl Display for TryReserveError`[src]

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

`impl Display for Infallible`[src]

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

`impl Display for VarError`[src]

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

`impl Display for IpAddr`[src]

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

`impl Display for SocketAddr`[src]

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

`impl Display for RecvTimeoutError`[src]

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

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

`fn fmt(&self, &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 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 TryFromSliceError`[src]

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

`impl Display for std::ascii::EscapeDefault`[src]

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

`impl Display for Backtrace`[src]

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

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

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

`impl Display for DecodeUtf16Error`[src]

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

`impl Display for std::char::EscapeDebug`[src]

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

`impl Display for std::char::EscapeDefault`[src]

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

`impl Display for std::char::EscapeUnicode`[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 ToLowercase`[src]