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.

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§

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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, }));

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impl Display for Mode

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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 std::io::error::ErrorKind

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impl Display for std::sync::mpsc::RecvTimeoutError

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impl Display for std::sync::mpsc::TryRecvError

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impl Display for bincode::error::ErrorKind

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impl Display for FromHexError

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impl Display for serde_json::value::Value

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impl Display for BernoulliError

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impl Display for WeightedError

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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 AleoV0

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impl Display for snarkvm_circuit::Error

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impl Display for Circuit

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impl Display for Arguments<'_>

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impl Display for snarkvm_circuit::environment::prelude::fmt::Error

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impl Display for alloc::collections::TryReserveError

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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 FromUtf8Error

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impl Display for FromUtf16Error

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impl Display for String

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impl Display for LayoutError

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

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impl Display for ParseIntError

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impl Display for TryFromIntError

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impl Display for NonZeroI8

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impl Display for NonZeroI16

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impl Display for NonZeroI32

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impl Display for NonZeroI64

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impl Display for NonZeroI128

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impl Display for NonZeroIsize

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impl Display for NonZeroU8

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impl Display for NonZeroU16

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impl Display for NonZeroU32

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impl Display for NonZeroU64

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impl Display for NonZeroU128

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impl Display for NonZeroUsize

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impl Display for Location<'_>

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impl Display for PanicInfo<'_>

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impl Display for ParseBoolError

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impl Display for Utf8Error

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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 WriterPanicked

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

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impl Display for 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 std::sync::mpsc::RecvError

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impl Display for AccessError

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impl Display for SystemTimeError

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impl Display for ParseError

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impl Display for curl::error::Error

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impl Display for FormError

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impl Display for MultiError

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impl Display for ShareError

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impl Display for getrandom::error::Error

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impl Display for indexmap::TryReserveError

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impl Display for BigInt

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impl Display for BigUint

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impl Display for ParseBigIntError

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impl Display for num_traits::ParseFloatError

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

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impl Display for serde_json::error::Error

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impl Display for Number

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impl Display for ReadError

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impl Display for rand_core::error::Error

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impl Display for AllocError

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impl Display for BigInteger256

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impl Display for BigInteger384

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impl Display for CollectionAllocErr

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impl Display for ColoredString

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impl Display for ConstraintFieldError

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impl Display for Errno

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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 FieldError

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impl Display for GroupError

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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 LiteralType

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impl Display for MacError

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impl Display for PCError

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impl Display for ParameterError

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impl Display for RecvError

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impl Display for RecvTimeoutError

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impl Display for SNARKError

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impl Display for SelectTimeoutError

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impl Display for SerializationError

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impl Display for SynthesisError

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impl Display for ThreadPoolBuildError

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impl Display for TryRecvError

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impl Display for TrySelectError

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

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

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

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

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

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

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impl<'a, I> Display for Format<'a, I>where I: Iterator, <I as Iterator>::Item: Display,

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impl<'a, I, F> Display for FormatWith<'a, I, F>where I: Iterator, F: FnMut(<I as Iterator>::Item, &mut dyn FnMut(&dyn Display) -> Result<(), Error>) -> Result<(), Error>,

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

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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,

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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 + Clone,

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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<A> Display for snarkvm_circuit::Literal<A>where A: Aleo,

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impl<A> Display for snarkvm_circuit::Identifier<A>where A: Aleo,

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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 snarkvm_circuit::Address<E>where E: Environment,

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impl<E> Display for snarkvm_circuit::Boolean<E>where E: Environment,

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impl<E> Display for snarkvm_circuit::Field<E>where E: Environment,

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impl<E> Display for snarkvm_circuit::Group<E>where E: Environment,

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impl<E> Display for snarkvm_circuit::Scalar<E>where E: Environment,

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impl<E> Display for snarkvm_circuit::StringType<E>where E: Environment,

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

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impl<E> Display for Address<E>where E: Environment,

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impl<E> Display for Boolean<E>where E: Environment,

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impl<E> Display for CircuitVerifyingKey<E>where E: PairingEngine,

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impl<E> Display for Err<E>where E: Debug,

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impl<E> Display for Field<E>where E: Environment,

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impl<E> Display for Group<E>where E: Environment,

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impl<E> Display for Scalar<E>where E: Environment,

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impl<E> Display for StringType<E>where E: Environment,

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impl<E, I> Display for Integer<E, I>where E: Environment, I: IntegerType,

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impl<E, I> Display for Integer<E, I>where E: Environment, I: IntegerType,

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impl<F> Display for Variable<F>where F: PrimeField,

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impl<F> Display for LinearCombination<F>where F: PrimeField,

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impl<F> Display for R1CS<F>where F: PrimeField,

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impl<F, const PREFIX: u16> Display for AleoID<F, PREFIX>where F: FieldTrait,

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impl<I> Display for ExactlyOneError<I>where I: Iterator,

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impl<I> Display for Error<I>where I: Display,

The Display implementation allows the std::error::Error implementation

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impl<I> Display for VerboseError<I>where I: Display,

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

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impl<N> Display for Ciphertext<N>where N: Network,

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impl<N> Display for Entry<N, Plaintext<N>>where N: Network,

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impl<N> Display for EntryType<N>where N: Network,

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impl<N> Display for GraphKey<N>where N: Network,

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impl<N> Display for HeaderLeaf<N>where N: Network,

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impl<N> Display for Identifier<N>where N: Network,

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impl<N> Display for InputID<N>where N: Network,

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impl<N> Display for Literal<N>where N: Network,

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impl<N> Display for Locator<N>where N: Network,

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impl<N> Display for Owner<N, Plaintext<N>>where N: Network,

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impl<N> Display for Plaintext<N>where N: Network,

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impl<N> Display for PlaintextType<N>where N: Network,

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impl<N> Display for PrivateKey<N>where N: Network,

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impl<N> Display for ProgramID<N>where N: Network,

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impl<N> Display for ProgramOwner<N>where N: Network,

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impl<N> Display for Record<N, Ciphertext<N>>where N: Network,

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impl<N> Display for Record<N, Plaintext<N>>where N: Network,

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impl<N> Display for RecordType<N>where N: Network,

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impl<N> Display for Register<N>where N: Network,

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impl<N> Display for RegisterType<N>where N: Network,

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impl<N> Display for Request<N>where N: Network,

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impl<N> Display for Signature<N>where N: Network,

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impl<N> Display for StatePath<N>where N: Network,

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impl<N> Display for Struct<N>where N: Network,

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impl<N> Display for TransactionLeaf<N>where N: Network,

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impl<N> Display for TransitionLeaf<N>where N: Network,

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impl<N> Display for Value<N>where N: Network,

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impl<N> Display for ValueType<N>where N: Network,

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impl<N> Display for ViewKey<N>where N: Network,

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

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impl<P> Display for Affine<P>where P: ShortWeierstrassParameters,

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impl<P> Display for Affine<P>where P: TwistedEdwardsParameters,

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impl<P> Display for Fp2<P>where P: Fp2Parameters,

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impl<P> Display for Fp6<P>where P: Fp6Parameters,

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impl<P> Display for Fp12<P>where P: Fp12Parameters,

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impl<P> Display for Fp256<P>where P: Fp256Parameters,

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impl<P> Display for Fp384<P>where P: Fp384Parameters,

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impl<P> Display for Projective<P>where P: ShortWeierstrassParameters,

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impl<P> Display for Projective<P>where P: TwistedEdwardsParameters,

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impl<T> Display for std::sync::mpsc::TrySendError<T>

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impl<T> Display for TryLockError<T>

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

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impl<T> Display for &mut Twhere 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 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 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 std::sync::mpsc::SendError<T>

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

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impl<T> Display for PoisonError<T>

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

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

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impl<T> Display for CapacityError<T>

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impl<T> Display for TryFromBigIntError<T>

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impl<T> Display for SendError<T>

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impl<T> Display for SendTimeoutError<T>

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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 TrySendError<T>

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

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

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impl<T, const PREFIX: u32, const SIZE_IN_DATA_BYTES: usize> Display for AleoObject<T, PREFIX, SIZE_IN_DATA_BYTES>where T: Clone + Debug + ToBytes + FromBytes + PartialEq<T> + Eq + Sync + Send,

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impl<W> Display for IntoInnerError<W>

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impl<const CAP: usize> Display for ArrayString<CAP>

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