Trait wasmtime_environ::__core::fmt::Display

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

Format trait for an empty format, {}.

Implementing this trait for a type will automatically implement the ToString trait for the type, allowing the usage of the .to_string() method. Prefer implementing the Display trait for a type, rather than ToString.

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)");

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, }));

Implementors

impl Display for CompileError

impl Display for FlagValue

impl Display for Trap

impl Display for WasmError

impl Display for WasmType

impl Display for Infallible

impl Display for IpAddr

impl Display for SocketAddr

impl Display for VarError

impl Display for ErrorKind

impl Display for RecvTimeoutError

impl Display for TryRecvError

impl Display for gimli::read::Error

impl Display for Level

impl Display for LevelFilter

impl Display for target_lexicon::parse_error::ParseError

impl Display for Aarch64Architecture

impl Display for Architecture

impl Display for ArmArchitecture

impl Display for BinaryFormat

impl Display for Environment

impl Display for Mips32Architecture

impl Display for Mips64Architecture

impl Display for OperatingSystem

impl Display for Riscv32Architecture

impl Display for Riscv64Architecture

impl Display for Vendor

impl Display for X86_32Architecture

impl Display for url::parser::ParseError

impl Display for SyntaxViolation

impl Display for bool

impl Display for char

impl Display for f32

impl Display for f64

impl Display for i8

impl Display for i16

impl Display for i32

impl Display for i64

impl Display for i128

impl Display for isize

impl Display for !

impl Display for str

impl Display for u8

impl Display for u16

impl Display for u32

impl Display for u64

impl Display for u128

impl Display for usize

impl Display for BinaryReaderError

impl Display for KebabStr

impl Display for KebabString

impl Display for AllocError

impl Display for LayoutError

impl Display for wasmtime_environ::__core::array::TryFromSliceError

impl Display for wasmtime_environ::__core::ascii::EscapeDefault

impl Display for BorrowError

impl Display for BorrowMutError

impl Display for CharTryFromError

impl Display for DecodeUtf16Error

impl Display for wasmtime_environ::__core::char::EscapeDebug

impl Display for wasmtime_environ::__core::char::EscapeDefault

impl Display for wasmtime_environ::__core::char::EscapeUnicode

impl Display for ParseCharError

impl Display for ToLowercase

impl Display for ToUppercase

impl Display for TryFromCharError

impl Display for FromBytesUntilNulError

impl Display for FromBytesWithNulError

impl Display for AddrParseError

impl Display for Ipv4Addr

impl Display for Ipv6Addr

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

impl Display for SocketAddrV4

impl Display for SocketAddrV6

impl Display for NonZeroI8

impl Display for NonZeroI16

impl Display for NonZeroI32

impl Display for NonZeroI64

impl Display for NonZeroI128

impl Display for NonZeroIsize

impl Display for NonZeroU8

impl Display for NonZeroU16

impl Display for NonZeroU32

impl Display for NonZeroU64

impl Display for NonZeroU128

impl Display for NonZeroUsize

impl Display for ParseFloatError

impl Display for ParseIntError

impl Display for TryFromIntError

impl Display for Location<'_>

impl Display for PanicInfo<'_>

impl Display for ParseBoolError

impl Display for Utf8Error

impl Display for TryFromFloatSecsError

impl Display for TryReserveError

impl Display for FromVecWithNulError

impl Display for IntoStringError

impl Display for NulError

impl Display for FromUtf8Error

impl Display for FromUtf16Error

impl Display for String

impl Display for Backtrace

impl Display for JoinPathsError

impl Display for WriterPanicked

impl Display for std::io::error::Error

impl Display for Display<'_>

impl Display for StripPrefixError

impl Display for ExitStatus

impl Display for ExitStatusError

impl Display for RecvError

impl Display for AccessError

impl Display for SystemTimeError

impl Display for anyhow::Error

impl Display for getrandom::error::Error

impl Display for DwAccess

impl Display for DwAddr

impl Display for DwAt

impl Display for DwAte

impl Display for DwCc

impl Display for DwCfa

impl Display for DwChildren

impl Display for DwDefaulted

impl Display for DwDs

impl Display for DwDsc

impl Display for DwEhPe

impl Display for DwEnd

impl Display for DwForm

impl Display for DwId

impl Display for DwIdx

impl Display for DwInl

impl Display for DwLang

impl Display for DwLle

impl Display for DwLnct

impl Display for DwLne

impl Display for DwLns

impl Display for DwMacro

impl Display for DwOp

impl Display for DwOrd

impl Display for DwRle

impl Display for DwSect

impl Display for DwSectV2

impl Display for DwTag

impl Display for DwUt

impl Display for DwVirtuality

impl Display for DwVis

impl Display for ParseLevelError

impl Display for SetLoggerError

impl Display for object::read::Error

impl Display for object::write::Error

impl Display for serde::de::value::Error

impl Display for Triple

impl Display for Url

Display the serialization of this URL.

impl Display for Arguments<'_>

impl Display for wasmtime_environ::__core::fmt::Error

impl Display for Errors

impl Display for TryFromSliceError

impl<'a> Display for Unexpected<'a>

impl<'a> Display for EscapeAscii<'a>

impl<'a> Display for wasmtime_environ::__core::str::EscapeDebug<'a>

impl<'a> Display for wasmtime_environ::__core::str::EscapeDefault<'a>

impl<'a> Display for wasmtime_environ::__core::str::EscapeUnicode<'a>

impl<'a> Display for PercentEncode<'a>

impl<'a> Display for dyn Expected + 'a

impl<'a, K, V> Display for std::collections::hash::map::OccupiedError<'a, K, V>where K: Debug, V: Debug,

impl<'a, K, V, A> Display for alloc::collections::btree::map::entry::OccupiedError<'a, K, V, A>where K: Debug + Ord, V: Debug, A: Allocator + Clone,

impl<'a, K, V, S, A> Display for OccupiedError<'a, K, V, S, A>where K: Debug, V: Debug, A: Allocator + Clone,

impl<'s, T> Display for SliceVec<'s, T>where T: Display,

impl<A> Display for ArrayVec<A>where A: Array, <A as Array>::Item: Display,

impl<A> Display for TinyVec<A>where A: Array, <A as Array>::Item: Display,

impl<B> Display for Cow<'_, B>where B: Display + ToOwned + ?Sized, <B as ToOwned>::Owned: Display,

impl<E> Display for Report<E>where E: Error,

impl<I> Display for Decompositions<I>where I: Iterator<Item = char> + Clone,

impl<I> Display for Recompositions<I>where I: Iterator<Item = char> + Clone,

impl<I> Display for Replacements<I>where I: Iterator<Item = char> + Clone,

impl<P> Display for Pin<P>where P: Display,

impl<R, Offset> Display for LineInstruction<R, Offset>where R: Reader<Offset = Offset>, Offset: ReaderOffset,

impl<S> Display for Host<S>where S: AsRef<str>,

impl<T> Display for TrySendError<T>

impl<T> Display for TryLockError<T>

impl<T> Display for &Twhere T: Display + ?Sized,

impl<T> Display for &mut Twhere T: Display + ?Sized,

impl<T> Display for Ref<'_, T>where T: Display + ?Sized,

impl<T> Display for RefMut<'_, T>where T: Display + ?Sized,

impl<T> Display for Saturating<T>where T: Display,

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

impl<T> Display for ThinBox<T>where T: Display + ?Sized,

impl<T> Display for Rc<T>where T: Display + ?Sized,

impl<T> Display for Arc<T>where T: Display + ?Sized,

impl<T> Display for SendError<T>

impl<T> Display for MutexGuard<'_, T>where T: Display + ?Sized,

impl<T> Display for PoisonError<T>

impl<T> Display for RwLockReadGuard<'_, T>where T: Display + ?Sized,

impl<T> Display for RwLockWriteGuard<'_, T>where T: Display + ?Sized,

impl<T, A> Display for Box<T, A>where T: Display + ?Sized, A: Allocator,

impl<W> Display for IntoInnerError<W>

impl<const N: usize> Display for GetManyMutError<N>