# 1.0.0[−][src]Trait std::fmt::LowerHex

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

`x` formatting.

The `LowerHex` trait should format its output as a number in hexadecimal, with `a` through `f` in lower case.

For primitive signed integers (`i8` to `i128`, and `isize`), negative values are formatted as the two’s complement representation.

The alternate flag, `#`, adds a `0x` 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 '2a' in hex

    assert_eq!(format!("{:x}", x), "2a");
    assert_eq!(format!("{:#x}", x), "0x2a");

    assert_eq!(format!("{:x}", -16), "fffffff0");Run

Implementing `LowerHex` on a type:

    use std::fmt;

    struct Length(i32);

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

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

    let l = Length(9);

    println!("l as hex is: {:x}", l);Run

## Required methods

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

Formats the value using the given formatter.

Loading content...

## Implementors

### `impl LowerHex for i128`[src]

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

### `impl LowerHex for i16`[src]

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

### `impl LowerHex for i32`[src]

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

### `impl LowerHex for i64`[src]

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

### `impl LowerHex for i8`[src]

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

### `impl LowerHex for isize`[src]

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

### `impl LowerHex for u128`[src]

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

### `impl LowerHex for u16`[src]

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

### `impl LowerHex for u32`[src]

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

### `impl LowerHex for u64`[src]

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

### `impl LowerHex for u8`[src]

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

### `impl LowerHex for usize`[src]

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

### `impl LowerHex for NonZeroU128`[src]

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

### `impl LowerHex for NonZeroU16`[src]

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

### `impl LowerHex for NonZeroU32`[src]

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

### `impl LowerHex for NonZeroU64`[src]

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

### `impl LowerHex for NonZeroU8`[src]

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

### `impl LowerHex for NonZeroUsize`[src]

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

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

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

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

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

### `impl<T> LowerHex for Wrapping<T> where
T: LowerHex,` [src]

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

Loading content...

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse 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`)

Search multiple things at once by splitting your query with comma (e.g., `str,u8` or `String,struct:Vec,test`)