Trait collections::fmt::Display 1.0.0
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[src]
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.
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 }; println!("The origin is: {}", origin);
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)".to_owned(), format!("{}", Position { longitude: 1.987, latitude: 2.983, }));
Implementors
impl Display for ToLowercaseimpl Display for Utf8Lossyimpl Display for DecodeUtf16Errorimpl Display for ToUppercaseimpl Display for FromUtf8Errorimpl Display for Stringimpl Display for AllocErrimpl<T> Display for Arc<T> where
T: Display + ?Sized,impl Display for FromUtf16Errorimpl<T> Display for Rc<T> where
T: Display + ?Sized,impl Display for ParseErrorimpl<'a, B> Display for Cow<'a, B> where
B: Display + ToOwned + ?Sized,
<B as ToOwned>::Owned: Display,impl<T> Display for Box<T> where
T: Display + ?Sized,impl Display for CannotReallocInPlaceimpl Display for f32impl Display for isizeimpl Display for u16impl Display for EscapeDefaultimpl Display for ParseIntErrorimpl Display for u32impl Display for EscapeUnicodeimpl Display for EscapeDebugimpl<'a, T> Display for RefMut<'a, T> where
T: Display + ?Sized,impl<'a, T> Display for &'a T where
T: Display + ?Sized,impl<T> Display for Wrapping<T> where
T: Display,impl Display for BorrowMutErrorimpl Display for boolimpl Display for i16impl Display for f64impl<'a, T> Display for &'a mut T where
T: Display + ?Sized,impl Display for Utf8Errorimpl Display for i8impl<'a> Display for Arguments<'a>impl Display for !impl Display for CharTryFromErrorimpl Display for ParseCharErrorimpl Display for strimpl Display for i64impl Display for ParseFloatErrorimpl Display for u64impl Display for i32impl Display for ParseBoolErrorimpl Display for Errorimpl<'a, T> Display for Ref<'a, T> where
T: Display + ?Sized,impl Display for usizeimpl Display for u8impl Display for BorrowErrorimpl Display for charimpl Display for i128impl Display for TryFromIntErrorimpl Display for u128