Expand description
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)");
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, }));
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::Group
s with Delimiter::None
delimiters and negative
numeric literals.
impl Display for Infallible
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::Group
s
with Delimiter::None
delimiters and negative numeric literals.
impl Display for VarError
impl Display for ErrorKind
impl Display for SocketAddr
impl Display for IpAddr
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 core::fmt::Error
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 ParseBoolError
impl Display for Utf8Error
impl Display for Utf8Lossy
impl Display for FromFloatSecsError
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::Group
s
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::Group
s
with Delimiter::None
delimiters and negative numeric literals.
impl Display for Backtrace
impl Display for JoinPathsError
impl Display for Report<Box<dyn Error + 'static, Global>>
impl Display for WriterPanicked
impl Display for std::io::error::Error
impl Display for SocketAddrV4
impl Display for SocketAddrV6
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 InvalidHandleError
impl Display for NullHandleError
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::Group
s
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::Group
s with Delimiter::None
delimiters and negative
numeric literals.