Trait wasmer_compiler::lib::std::fmt::Display

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

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.

§Internationalization

Because a type can only have one Display implementation, it is often preferable to only implement Display when there is a single most “obvious” way that values can be formatted as text. This could mean formatting according to the “invariant” culture and “undefined” locale, or it could mean that the type display is designed for a specific culture/locale, such as developer logs.

If not all values have a justifiably canonical textual format or if you want to support alternative formats not covered by the standard set of possible formatting traits, the most flexible approach is display adapters: methods like str::escape_default or Path::display which create a wrapper implementing Display to output the specific display format.

§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§

1.0.0 · source

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

Formats the value using the given formatter.

§Errors

This function should return Err if, and only if, the provided Formatter returns Err. String formatting is considered an infallible operation; this function only returns a Result because writing to the underlying stream might fail and it must provide a way to propagate the fact that an error has occurred back up the stack.

§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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impl Display for WaiterError

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impl Display for Trap

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impl Display for ImportError

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impl Display for InstantiationError

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impl Display for LinkError

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impl Display for ObjectError

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impl Display for RelocationKind

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impl Display for Aarch64Architecture

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impl Display for Architecture

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impl Display for BinaryFormat

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impl Display for CpuFeature

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impl Display for Environment

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impl Display for OperatingSystem

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impl Display for Vendor

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impl Display for RecvTimeoutError

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impl Display for TryRecvError

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impl Display for AsciiChar

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impl Display for Infallible

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impl Display for IpAddr

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impl Display for SocketAddr

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impl Display for VarError

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impl Display for ErrorKind

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impl Display for FromHexError

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impl Display for bool

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impl Display for char

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impl Display for f32

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impl Display for f64

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impl Display for i8

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impl Display for i16

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impl Display for i32

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impl Display for i64

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impl Display for i128

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impl Display for isize

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impl Display for !

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impl Display for str

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impl Display for u8

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impl Display for u16

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impl Display for u32

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impl Display for u64

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impl Display for u128

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impl Display for usize

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impl Display for Triple

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impl Display for UnorderedKeyError

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impl Display for wasmer_compiler::lib::std::collections::TryReserveError

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impl Display for ParseBoolError

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impl Display for wasmer_compiler::lib::std::str::Utf8Error

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impl Display for FromUtf8Error

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impl Display for FromUtf16Error

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impl Display for String

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impl Display for RecvError

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impl Display for FromVecWithNulError

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impl Display for IntoStringError

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impl Display for NulError

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impl Display for LayoutError

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impl Display for AllocError

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impl Display for TryFromSliceError

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impl Display for core::ascii::EscapeDefault

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impl Display for BorrowError

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impl Display for BorrowMutError

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impl Display for CharTryFromError

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impl Display for ParseCharError

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impl Display for DecodeUtf16Error

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impl Display for core::char::EscapeDebug

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impl Display for core::char::EscapeDefault

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impl Display for core::char::EscapeUnicode

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impl Display for ToLowercase

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impl Display for ToUppercase

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impl Display for TryFromCharError

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impl Display for FromBytesUntilNulError

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impl Display for FromBytesWithNulError

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impl Display for Ipv4Addr

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impl Display for Ipv6Addr

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

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impl Display for AddrParseError

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impl Display for SocketAddrV4

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impl Display for SocketAddrV6

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impl Display for ParseFloatError

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impl Display for ParseIntError

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impl Display for TryFromIntError

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impl Display for Location<'_>

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impl Display for PanicInfo<'_>

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impl Display for PanicMessage<'_>

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impl Display for TryFromFloatSecsError

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impl Display for Backtrace

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impl Display for JoinPathsError

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impl Display for std::ffi::os_str::Display<'_>

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impl Display for WriterPanicked

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

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impl Display for PanicHookInfo<'_>

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impl Display for std::path::Display<'_>

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impl Display for StripPrefixError

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impl Display for ExitStatus

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impl Display for ExitStatusError

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impl Display for AccessError

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impl Display for SystemTimeError

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impl Display for CompressError

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impl Display for flate2::mem::DecompressError

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impl Display for getrandom::error::Error

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impl Display for semver::parse::Error

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impl Display for BuildMetadata

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impl Display for Comparator

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impl Display for Prerelease

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impl Display for Version

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impl Display for VersionReq

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

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impl Display for Arguments<'_>

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impl Display for wasmer_compiler::lib::std::fmt::Error

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impl Display for ArchivedString

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impl Display for ArmArchitecture

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impl Display for BinaryReaderError

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impl Display for BlockHeaderReadError

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impl Display for BlockSizeError

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impl Display for BlockType

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impl Display for BlockTypeError

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impl Display for BoxedError

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impl Display for CollectionAllocErr

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impl Display for CompileError

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impl Display for ComponentName

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impl Display for CompositeType

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impl Display for DecodeBlockContentError

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impl Display for DecodeSequenceError

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impl Display for DecodebufferError

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impl Display for DecompressBlockError

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impl Display for DecompressError

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impl Display for DecompressLiteralsError

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impl Display for DeserializeError

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impl Display for DictionaryDecodeError

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impl Display for DwAccess

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impl Display for DwAddr

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impl Display for DwAt

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impl Display for DwAte

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impl Display for DwCc

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impl Display for DwCfa

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impl Display for DwChildren

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impl Display for DwDefaulted

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impl Display for DwDs

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impl Display for DwDsc

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impl Display for DwEhPe

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impl Display for DwEnd

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impl Display for DwForm

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impl Display for DwId

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impl Display for DwIdx

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impl Display for DwInl

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impl Display for DwLang

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impl Display for DwLle

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impl Display for DwLnct

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impl Display for DwLne

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impl Display for DwLns

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impl Display for DwMacro

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impl Display for DwOp

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impl Display for DwOrd

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impl Display for DwRle

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impl Display for DwSect

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impl Display for DwSectV2

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impl Display for DwTag

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impl Display for DwUt

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impl Display for DwVirtuality

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impl Display for DwVis

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impl Display for Error

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impl Display for Error

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impl Display for Error

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impl Display for Error

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impl Display for Error

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impl Display for Error

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impl Display for Error

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impl Display for ExecuteSequencesError

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impl Display for FSEDecoderError

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impl Display for FSETableError

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impl Display for Failure

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impl Display for FrameDecoderError

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impl Display for FrameDescriptorError

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impl Display for FrameHeaderError

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impl Display for FunctionType

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impl Display for GetBitsError

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impl Display for GlobalType

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impl Display for HuffmanDecoderError

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impl Display for HuffmanTableError

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impl Display for InvalidBufferSize

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impl Display for InvalidLength

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impl Display for InvalidOutputSize

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impl Display for IteratorLengthMismatch

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impl Display for KebabStr

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impl Display for KebabString

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impl Display for LibCall

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impl Display for LiteralsSectionParseError

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impl Display for LiteralsSectionType

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impl Display for MemoryError

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impl Display for MemoryType

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impl Display for MiddlewareError

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impl Display for Mips32Architecture

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impl Display for Mips64Architecture

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impl Display for MmapError

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impl Display for ModuleHash

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impl Display for ModuleInfo

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impl Display for NamedEnumVariantCheckContext

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impl Display for NonZeroI16_be

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impl Display for NonZeroI16_le

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impl Display for NonZeroI16_ube

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impl Display for NonZeroI16_ule

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impl Display for NonZeroI32_be

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impl Display for NonZeroI32_le

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impl Display for NonZeroI32_ube

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impl Display for NonZeroI32_ule

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impl Display for NonZeroI64_be

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impl Display for NonZeroI64_le

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impl Display for NonZeroI64_ube

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impl Display for NonZeroI64_ule

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impl Display for NonZeroI128_be

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impl Display for NonZeroI128_le

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impl Display for NonZeroI128_ube

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impl Display for NonZeroI128_ule

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impl Display for NonZeroU16_be

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impl Display for NonZeroU16_le

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impl Display for NonZeroU16_ube

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impl Display for NonZeroU16_ule

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impl Display for NonZeroU32_be

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impl Display for NonZeroU32_le

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impl Display for NonZeroU32_ube

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impl Display for NonZeroU32_ule

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impl Display for NonZeroU64_be

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impl Display for NonZeroU64_le

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impl Display for NonZeroU64_ube

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impl Display for NonZeroU64_ule

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impl Display for NonZeroU128_be

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impl Display for NonZeroU128_le

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impl Display for NonZeroU128_ube

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impl Display for NonZeroU128_ule

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impl Display for PackedIndex

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impl Display for PageCountOutOfRange

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impl Display for Panic

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impl Display for ParseCpuFeatureError

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impl Display for ParseError

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impl Display for ParseError

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impl Display for PreInstantiationError

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impl Display for PrimitiveValType

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impl Display for Protection

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impl Display for ReadFrameHeaderError

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impl Display for RefType

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impl Display for Riscv32Architecture

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impl Display for Riscv64Architecture

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impl Display for SectionIndex

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impl Display for Sequence

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impl Display for SequencesHeaderParseError

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impl Display for SerializeError

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impl Display for SourceLoc

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impl Display for StorageType

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impl Display for StoreId

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impl Display for StructCheckContext

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impl Display for SubType

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impl Display for SymbolIndex

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impl Display for TableType

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impl Display for TrapCode

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impl Display for TryReserveError

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impl Display for TupleStructCheckContext

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impl Display for Type

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impl Display for UnnamedEnumVariantCheckContext

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impl Display for UnpackedIndex

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impl Display for Utf8Error

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impl Display for Utf8Error

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impl Display for ValType

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impl Display for WasmError

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impl Display for X86_32Architecture

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impl Display for char_be

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impl Display for char_le

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impl Display for char_ube

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impl Display for char_ule

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impl Display for dyn Expected + '_

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impl Display for f32_be

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impl Display for f32_le

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impl Display for f32_ube

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impl Display for f32_ule

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impl Display for f64_be

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impl Display for f64_le

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impl Display for f64_ube

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impl Display for f64_ule

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impl Display for i16_be

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impl Display for i16_le

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impl Display for i16_ube

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impl Display for i16_ule

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impl Display for i32_be

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impl Display for i32_le

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impl Display for i32_ube

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impl Display for i32_ule

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impl Display for i64_be

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impl Display for i64_le

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impl Display for i64_ube

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impl Display for i64_ule

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impl Display for i128_be

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impl Display for i128_le

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impl Display for i128_ube

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impl Display for i128_ule

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impl Display for u16_be

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impl Display for u16_le

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impl Display for u16_ube

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impl Display for u16_ule

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impl Display for u32_be

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impl Display for u32_le

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impl Display for u32_ube

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impl Display for u32_ule

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impl Display for u64_be

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impl Display for u64_le

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impl Display for u64_ube

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impl Display for u64_ule

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impl Display for u128_be

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impl Display for u128_le

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impl Display for u128_ube

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impl Display for u128_ule

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

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impl<'a> Display for wasmer_compiler::lib::std::str::EscapeDebug<'a>

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impl<'a> Display for wasmer_compiler::lib::std::str::EscapeDefault<'a>

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impl<'a> Display for wasmer_compiler::lib::std::str::EscapeUnicode<'a>

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

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impl<'a> Display for BytesOrWideString<'a>

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impl<'a> Display for Demangle<'a>

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impl<'a> Display for SymbolName<'a>

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impl<'a, K, V> Display for wasmer_compiler::lib::std::collections::hash_map::OccupiedError<'a, K, V>
where K: Debug, V: Debug,

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impl<'a, K, V, A> Display for wasmer_compiler::lib::std::collections::btree_map::OccupiedError<'a, K, V, A>
where K: Debug + Ord, V: Debug, A: Allocator + Clone,

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

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

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impl<'a, K, V, T> Display for MappedRef<'a, K, V, T>
where K: Eq + Hash, T: Display,

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impl<'a, R, G, T> Display for MappedReentrantMutexGuard<'a, R, G, T>
where R: RawMutex + 'a, G: GetThreadId + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, G, T> Display for ReentrantMutexGuard<'a, R, G, T>
where R: RawMutex + 'a, G: GetThreadId + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for MappedMutexGuard<'a, R, T>
where R: RawMutex + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for MappedRwLockReadGuard<'a, R, T>
where R: RawRwLock + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for MappedRwLockWriteGuard<'a, R, T>
where R: RawRwLock + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for MutexGuard<'a, R, T>
where R: RawMutex + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for RwLockReadGuard<'a, R, T>
where R: RawRwLock + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for RwLockUpgradableReadGuard<'a, R, T>
where R: RawRwLockUpgrade + 'a, T: Display + 'a + ?Sized,

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impl<'a, R, T> Display for RwLockWriteGuard<'a, R, T>
where R: RawRwLock + 'a, T: Display + 'a + ?Sized,

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

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

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impl<F> Display for FormatterFn<F>
where F: Fn(&mut Formatter<'_>) -> Result<(), Error>,

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impl<O> Display for F32<O>
where O: ByteOrder,

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impl<O> Display for F64<O>
where O: ByteOrder,

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impl<O> Display for I16<O>
where O: ByteOrder,

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impl<O> Display for I32<O>
where O: ByteOrder,

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impl<O> Display for I64<O>
where O: ByteOrder,

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impl<O> Display for I128<O>
where O: ByteOrder,

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impl<O> Display for U16<O>
where O: ByteOrder,

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impl<O> Display for U32<O>
where O: ByteOrder,

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impl<O> Display for U64<O>
where O: ByteOrder,

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impl<O> Display for U128<O>
where O: ByteOrder,

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

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impl<T> Display for TryLockError<T>

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impl<T> Display for TrySendError<T>

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

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

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

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impl<T> Display for SendError<T>

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impl<T> Display for wasmer_compiler::lib::std::sync::MappedMutexGuard<'_, T>
where T: Display + ?Sized,

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impl<T> Display for wasmer_compiler::lib::std::sync::MappedRwLockReadGuard<'_, T>
where T: Display + ?Sized,

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impl<T> Display for wasmer_compiler::lib::std::sync::MappedRwLockWriteGuard<'_, T>
where T: Display + ?Sized,

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impl<T> Display for wasmer_compiler::lib::std::sync::MutexGuard<'_, T>
where T: Display + ?Sized,

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impl<T> Display for PoisonError<T>

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

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impl<T> Display for wasmer_compiler::lib::std::sync::RwLockReadGuard<'_, T>
where T: Display + ?Sized,

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impl<T> Display for wasmer_compiler::lib::std::sync::RwLockWriteGuard<'_, T>
where T: Display + ?Sized,

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

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

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impl<T> Display for NonZero<T>

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

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

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

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

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impl<T> Display for EnumSet<T>
where T: EnumSetType + Display,

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

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

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

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impl<T> Display for Unalign<T>
where T: Unaligned + Display,

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

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

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

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impl<T, B> Display for Ref<B, [T]>
where B: ByteSlice, T: FromBytes, [T]: Display,

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impl<T, B> Display for Ref<B, T>
where B: ByteSlice, T: FromBytes + Display,

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impl<T, F> Display for ArchivedRc<T, F>
where T: ArchivePointee + Display + ?Sized,

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impl<W> Display for IntoInnerError<W>

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