Trait parsel::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 Lit

impl Display for parsel::TokenTree

Prints the token tree as a string that is supposed to be losslessly convertible back into the same token tree (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters and negative numeric literals.

impl Display for Infallible

impl Display for IpAddr

impl Display for SocketAddr

impl Display for proc_macro::TokenTree

Prints the token tree as a string that is supposed to be losslessly convertible back into the same token tree (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters and negative numeric literals.

impl Display for VarError

impl Display for ErrorKind

impl Display for RecvTimeoutError

impl Display for TryRecvError

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 Empty

impl Display for Eof

impl Display for parsel::ast::Ident

Prints the identifier as a string that should be losslessly convertible back into the same identifier.

impl Display for LitBool

impl Display for LitByte

impl Display for LitByteStr

impl Display for LitChar

impl Display for parsel::ast::LitFloat

impl Display for parsel::ast::LitInt

impl Display for LitStr

impl Display for LitUint

impl Display for NotEof

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 LayoutError

impl Display for AllocError

impl Display for TryFromSliceError

impl Display for core::ascii::EscapeDefault

impl Display for BorrowError

impl Display for BorrowMutError

impl Display for CharTryFromError

impl Display for ParseCharError

impl Display for DecodeUtf16Error

impl Display for core::char::EscapeDebug

impl Display for core::char::EscapeDefault

impl Display for core::char::EscapeUnicode

impl Display for ToLowercase

impl Display for ToUppercase

impl Display for TryFromCharError

impl Display for FromBytesUntilNulError

impl Display for FromBytesWithNulError

impl Display for Arguments<'_>

impl Display for core::fmt::Error

impl Display for Ipv4Addr

impl Display for Ipv6Addr

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

impl Display for AddrParseError

impl Display for SocketAddrV4

impl Display for SocketAddrV6

impl Display for core::num::dec2flt::ParseFloatError

impl Display for ParseIntError

impl Display for TryFromIntError

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 Location<'_>

impl Display for PanicInfo<'_>

impl Display for ParseBoolError

impl Display for Utf8Error

impl Display for TryFromFloatSecsError

impl Display for ExpandError

impl Display for proc_macro::Group

Prints the group as a string that should be losslessly convertible back into the same group (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters.

impl Display for proc_macro::Ident

Prints the identifier as a string that should be losslessly convertible back into the same identifier.

impl Display for proc_macro::LexError

impl Display for proc_macro::Literal

Prints the literal as a string that should be losslessly convertible back into the same literal (except for possible rounding for floating point literals).

impl Display for proc_macro::Punct

Prints the punctuation character as a string that should be losslessly convertible back into the same character.

impl Display for proc_macro::TokenStream

Prints the token stream as a string that is supposed to be losslessly convertible back into the same token stream (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters and negative numeric literals.

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 num_traits::ParseFloatError

impl Display for FloatIsNan

impl Display for proc_macro2::Group

Prints the group as a string that should be losslessly convertible back into the same group (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters.

impl Display for proc_macro2::LexError

impl Display for proc_macro2::Literal

impl Display for proc_macro2::Punct

Prints the punctuation character as a string that should be losslessly convertible back into the same character.

impl Display for Lifetime

impl Display for syn::lit::LitFloat

impl Display for syn::lit::LitInt

impl Display for parsel::Error

impl Display for parsel::TokenStream

Prints the token stream as a string that is supposed to be losslessly convertible back into the same token stream (modulo spans), except for possibly TokenTree::Groups with Delimiter::None delimiters and negative numeric literals.

impl Display for SpanDisplay

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

impl<'a> Display for core::str::iter::EscapeDebug<'a>

impl<'a> Display for core::str::iter::EscapeDefault<'a>

impl<'a> Display for core::str::iter::EscapeUnicode<'a>

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

impl<E> Display for ParseNotNanError<E>where E: Display,

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

impl<K> Display for CustomIdent<K>

impl<L, R> Display for Either<L, R>where L: Display, R: Display,

impl<O, L> Display for RightAssoc<O, L>where O: ToTokens, L: ToTokens,

impl<O, R> Display for LeftAssoc<O, R>where O: ToTokens, R: ToTokens,

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

impl<P, T> Display for Maybe<P, T>where P: ToTokens, T: ToTokens,

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 Any<T>where T: ToTokens,

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 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 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> Display for OrderedFloat<T>where T: Float + Display,

impl<T> Display for NotNan<T>where T: Float + Display,

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

impl<T, P> Display for Punctuated<T, P>where T: ToTokens, P: ToTokens,

impl<T, P> Display for Separated<T, P>where T: ToTokens, P: ToTokens,

impl<T: ToTokens> Display for Brace<T>

impl<T: ToTokens> Display for Bracket<T>

impl<T: ToTokens> Display for Paren<T>

impl<W> Display for IntoInnerError<W>

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