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Trait std::fmt::Pointer

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

p formatting.

The Pointer trait should format its output as a memory location. This is commonly presented as hexadecimal.

Examples

Basic usage with &i32:

let x = &42;

let address = format!("{:p}", x); // this produces something like '0x7f06092ac6d0'

Implementing Pointer on a type:

use std::fmt;

struct Length(i32);

impl fmt::Pointer for Length {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        // use `as` to convert to a `*const T`, which implements Pointer, which we can use

        let ptr = self as *const Self;
        fmt::Pointer::fmt(&ptr, f)
    }
}

let l = Length(42);

println!("l is in memory here: {:p}", l);

let l_ptr = format!("{:018p}", l);
assert_eq!(l_ptr.len(), 18);
assert_eq!(&l_ptr[..2], "0x");

Required methods

Formats the value using the given formatter.

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Implementors

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© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/fmt/trait.Pointer.html

Trait std::fmt::Pointer

Examples

Required methods

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

Implementors

impl<'_, T> Pointer for &'_ T where T: ?Sized, [src]

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

impl<'_, T> Pointer for &'_ mut T where T: ?Sized, [src]

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

impl<P> Pointer for Pin<P> where P: Pointer, [src]

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

impl<Ret> Pointer for fn() -> Ret[src]

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

impl<Ret> Pointer for extern "C" fn() -> Ret[src]

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

impl<Ret> Pointer for unsafe fn() -> Ret[src]

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

impl<Ret> Pointer for unsafe extern "C" fn() -> Ret[src]

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

impl<Ret, A> Pointer for fn(A) -> Ret[src]

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

impl<Ret, A> Pointer for extern "C" fn(A) -> Ret[src]

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

impl<Ret, A> Pointer for extern "C" fn(A, ...) -> Ret[src]

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

impl<Ret, A> Pointer for unsafe fn(A) -> Ret[src]

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

impl<Ret, A> Pointer for unsafe extern "C" fn(A) -> Ret[src]

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

impl<Ret, A> Pointer for unsafe extern "C" fn(A, ...) -> Ret[src]

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

impl<Ret, A, B> Pointer for fn(A, B) -> Ret[src]

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

impl<Ret, A, B> Pointer for extern "C" fn(A, B) -> Ret[src]

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

impl<Ret, A, B> Pointer for extern "C" fn(A, B, ...) -> Ret[src]

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

impl<Ret, A, B> Pointer for unsafe fn(A, B) -> Ret[src]

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

impl<Ret, A, B> Pointer for unsafe extern "C" fn(A, B) -> Ret[src]

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

impl<Ret, A, B> Pointer for unsafe extern "C" fn(A, B, ...) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for fn(A, B, C) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for extern "C" fn(A, B, C) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for extern "C" fn(A, B, C, ...) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for unsafe fn(A, B, C) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(A, B, C) -> Ret[src]

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

impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(A, B, C, ...) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for fn(A, B, C, D) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for extern "C" fn(A, B, C, D) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for extern "C" fn(A, B, C, D, ...) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for unsafe fn(A, B, C, D) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(A, B, C, D) -> Ret[src]

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

impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(A, B, C, D, ...) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for fn(A, B, C, D, E) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(A, B, C, D, E) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(A, B, C, D, E, ...) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for unsafe fn(A, B, C, D, E) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(A, B, C, D, E) -> Ret[src]

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

impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret[src]

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

impl<Ret, A, B, C, D, E, F> Pointer for fn(A, B, C, D, E, F) -> Ret[src]

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

`impl<'_, T> Pointer for &'_ T where T: ?Sized,` [src]

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

`impl<'_, T> Pointer for &'_ mut T where T: ?Sized,` [src]

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

`impl<P> Pointer for Pin<P> where P: Pointer,` [src]

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

`impl<Ret> Pointer for fn() -> Ret`[src]

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

`impl<Ret> Pointer for extern "C" fn() -> Ret`[src]

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

`impl<Ret> Pointer for unsafe fn() -> Ret`[src]

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

`impl<Ret> Pointer for unsafe extern "C" fn() -> Ret`[src]

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

`impl<Ret, A> Pointer for fn(A) -> Ret`[src]

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

`impl<Ret, A> Pointer for extern "C" fn(A) -> Ret`[src]

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

`impl<Ret, A> Pointer for extern "C" fn(A, ...) -> Ret`[src]

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

`impl<Ret, A> Pointer for unsafe fn(A) -> Ret`[src]

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

`impl<Ret, A> Pointer for unsafe extern "C" fn(A) -> Ret`[src]

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

`impl<Ret, A> Pointer for unsafe extern "C" fn(A, ...) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for fn(A, B) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for extern "C" fn(A, B) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for extern "C" fn(A, B, ...) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for unsafe fn(A, B) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for unsafe extern "C" fn(A, B) -> Ret`[src]

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

`impl<Ret, A, B> Pointer for unsafe extern "C" fn(A, B, ...) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for fn(A, B, C) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for extern "C" fn(A, B, C) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for extern "C" fn(A, B, C, ...) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for unsafe fn(A, B, C) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(A, B, C) -> Ret`[src]

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

`impl<Ret, A, B, C> Pointer for unsafe extern "C" fn(A, B, C, ...) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for fn(A, B, C, D) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for extern "C" fn(A, B, C, D) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for extern "C" fn(A, B, C, D, ...) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for unsafe fn(A, B, C, D) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(A, B, C, D) -> Ret`[src]

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

`impl<Ret, A, B, C, D> Pointer for unsafe extern "C" fn(A, B, C, D, ...) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for fn(A, B, C, D, E) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(A, B, C, D, E) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for extern "C" fn(A, B, C, D, E, ...) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for unsafe fn(A, B, C, D, E) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(A, B, C, D, E) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E> Pointer for unsafe extern "C" fn(A, B, C, D, E, ...) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E, F> Pointer for fn(A, B, C, D, E, F) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E, F> Pointer for extern "C" fn(A, B, C, D, E, F) -> Ret`[src]

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

`impl<Ret, A, B, C, D, E, F> Pointer for extern "C" fn(A, B, C, D, E, F, ...) -> Ret`[src]