# Trait ethcore_util::standard::fmt::Octal 1.0.0 [−] [src]

    pub trait Octal {
        fn fmt(&self, &mut Formatter) -> Result<(), Error>;
    }

Format trait for the `o` character.

The `Octal` trait should format its output as a number in base-8.

The alternate flag, `#`, adds a `0o` in front of the output.

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

# Examples

Basic usage with `i32`:

    let x = 42; // 42 is '52' in octal

    assert_eq!(format!("{:o}", x), "52");
    assert_eq!(format!("{:#o}", x), "0o52");

Implementing `Octal` on a type:

    use std::fmt;

    struct Length(i32);

    impl fmt::Octal for Length {
        fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
            let val = self.0;

            write!(f, "{:o}", val) // delegate to i32's implementation
        }
    }

    let l = Length(9);

    println!("l as octal is: {:o}", l);

## Required Methods

### `fn fmt(&self, &mut Formatter) -> Result<(), Error>`

Formats the value using the given formatter.

## Implementors

- `impl<T> Octal for Wrapping<T> where T: Octal`
- `impl Octal for isize`
- `impl Octal for usize`
- `impl Octal for i8`
- `impl Octal for u8`
- `impl Octal for i16`
- `impl Octal for u16`
- `impl Octal for i32`
- `impl Octal for u32`
- `impl Octal for i64`
- `impl Octal for u64`
- `impl<'a, T> Octal for &'a T where T: Octal + ?Sized`
- `impl<'a, T> Octal for &'a mut T where T: Octal + ?Sized`
- `impl<'a, I> Octal for FormatDefault<'a, I> where I: Iterator, I::Item: Octal`

# Help

## Keyboard Shortcuts

?
  Show this help dialog
S
  Focus the search field
⇤
  Move up in search results
⇥
  Move down in search results
⏎
  Go to active search result
+
  Collapse/expand all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)