rosetta_server::crypto::bip39::core::fmt

Trait Debug

1.6.0 · Source

pub trait Debug {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}

Expand description

? formatting.

Debug should format the output in a programmer-facing, debugging context.

Generally speaking, you should just derive a Debug implementation.

When used with the alternate format specifier #?, the output is pretty-printed.

For more information on formatters, see the module-level documentation.

This trait can be used with #[derive] if all fields implement Debug. When derived for structs, it will use the name of the struct, then {, then a comma-separated list of each field’s name and Debug value, then }. For enums, it will use the name of the variant and, if applicable, (, then the Debug values of the fields, then ).

§Stability

Derived Debug formats are not stable, and so may change with future Rust versions. Additionally, Debug implementations of types provided by the standard library (std, core, alloc, etc.) are not stable, and may also change with future Rust versions.

§Examples

Deriving an implementation:

#[derive(Debug)]
struct Point {
    x: i32,
    y: i32,
}

let origin = Point { x: 0, y: 0 };

assert_eq!(
    format!("The origin is: {origin:?}"),
    "The origin is: Point { x: 0, y: 0 }",
);

Manually implementing:

use std::fmt;

struct Point {
    x: i32,
    y: i32,
}

impl fmt::Debug for Point {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("Point")
         .field("x", &self.x)
         .field("y", &self.y)
         .finish()
    }
}

let origin = Point { x: 0, y: 0 };

assert_eq!(
    format!("The origin is: {origin:?}"),
    "The origin is: Point { x: 0, y: 0 }",
);

There are a number of helper methods on the Formatter struct to help you with manual implementations, such as debug_struct.

Types that do not wish to use the standard suite of debug representations provided by the Formatter trait (debug_struct, debug_tuple, debug_list, debug_set, debug_map) can do something totally custom by manually writing an arbitrary representation to the Formatter.

impl fmt::Debug for Point {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Point [{} {}]", self.x, self.y)
    }
}

Debug implementations using either derive or the debug builder API on Formatter support pretty-printing using the alternate flag: {:#?}.

Pretty-printing with #?:

#[derive(Debug)]
struct Point {
    x: i32,
    y: i32,
}

let origin = Point { x: 0, y: 0 };

let expected = "The origin is: Point {
    x: 0,
    y: 0,
}";
assert_eq!(format!("The origin is: {origin:#?}"), expected);

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::Debug for Position {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_tuple("")
         .field(&self.longitude)
         .field(&self.latitude)
         .finish()
    }
}

let position = Position { longitude: 1.987, latitude: 2.983 };
assert_eq!(format!("{position:?}"), "(1.987, 2.983)");

assert_eq!(format!("{position:#?}"), "(
    1.987,
    2.983,
)");

Debug

Trait Debug Copy item path

§Stability

§Examples

Required Methods§

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

§Errors

§Examples

Trait Implementations§

impl<'v, 'u> From<&'v &'u dyn Debug> for ValueBag<'v>where 'u: 'v,

fn from(v: &'v &'u dyn Debug) -> ValueBag<'v>

impl<'v> From<&'v dyn Debug> for ValueBag<'v>

fn from(v: &'v dyn Debug) -> ValueBag<'v>

Implementors§

impl Debug for rosetta_server::Error

impl Debug for BlockEventType

impl Debug for Case

impl Debug for CoinAction

impl Debug for CurveType

impl Debug for rosetta_server::types::Direction

impl Debug for ExemptionType

impl Debug for Operator

impl Debug for SignatureType

impl Debug for AddressFormat

impl Debug for Ss58AddressFormatRegistry

impl Debug for Algorithm

impl Debug for rosetta_server::crypto::PublicKey

impl Debug for rosetta_server::crypto::Signature

impl Debug for rosetta_server::crypto::bip39::Error

impl Debug for rosetta_server::crypto::bip39::Language

impl Debug for AsciiChar

impl Debug for rosetta_server::crypto::bip39::core::cmp::Ordering

impl Debug for Infallible

impl Debug for FromBytesWithNulError

impl Debug for c_void

impl Debug for AtomicOrdering

impl Debug for IpAddr

impl Debug for Ipv6MulticastScope

impl Debug for rosetta_server::crypto::bip39::core::net::SocketAddr

impl Debug for FpCategory

impl Debug for IntErrorKind

impl Debug for rosetta_server::crypto::bip39::core::slice::GetDisjointMutError

impl Debug for SearchStep

impl Debug for rosetta_server::crypto::bip39::core::sync::atomic::Ordering

impl Debug for rosetta_server::crypto::bip39::core::fmt::Alignment

impl Debug for DebugAsHex

impl Debug for rosetta_server::crypto::bip39::core::fmt::Sign

impl Debug for TryReserveErrorKind

impl Debug for BacktraceStatus

impl Debug for VarError

impl Debug for std::fs::TryLockError

impl Debug for std::io::SeekFrom

impl Debug for std::io::error::ErrorKind

impl Debug for std::net::Shutdown

impl Debug for AncillaryError

impl Debug for BacktraceStyle

impl Debug for RecvTimeoutError

impl Debug for std::sync::mpsc::TryRecvError

impl Debug for Action

impl Debug for anstyle_parse::state::definitions::State

impl Debug for AnsiColor

impl Debug for Color

impl Debug for async_channel::TryRecvError

impl Debug for async_channel::TryRecvError

impl Debug for ConnectionStatus

impl Debug for async_signal::Signal

impl Debug for async_sse::event::Event

impl Debug for base16ct::error::Error

impl Debug for DecodeError

impl Debug for CharacterSet

impl Debug for base64ct::errors::Error

impl Debug for LineEnding

impl Debug for bech32::Error

impl Debug for bech32::Variant

impl Debug for bitcoin_hashes::error::Error

impl Debug for bitcoin_hashes::hex::Error

impl Debug for bs58::alphabet::Error

impl Debug for bs58::decode::Error

impl Debug for bs58::encode::Error

impl Debug for byteorder::BigEndian

Trait Debug

impl<'v, 'u> From<&'v &'u dyn Debug> for ValueBag<'v>
where 'u: 'v,