# Struct core::ops::RangeTo 1.0.0 [−] [src]

    pub struct RangeTo<Idx> {
        pub end: Idx,
    }

A range which is only bounded above: { x | x < end }. Use `..end` (two dots) for its shorthand.

See the `contains()` method for its characterization.

It cannot serve as an iterator because it doesn't have a starting point. ``` fn main() { assert_eq!((..5), std::ops::RangeTo{ end: 5 });

fn main() { let arr = [0, 1, 2, 3]; assert_eq!(arr[ .. ], [0,1,2,3]); assert_eq!(arr[ ..3], [0,1,2 ]); // RangeTo assert_eq!(arr[1.. ], [ 1,2,3]); assert_eq!(arr[1..3], [ 1,2 ]); }

    let arr = [0, 1, 2, 3];
    assert_eq!(arr[ .. ], [0,1,2,3]);
    assert_eq!(arr[ ..3], [0,1,2  ]);  // RangeTo
    assert_eq!(arr[1.. ], [  1,2,3]);
    assert_eq!(arr[1..3], [  1,2  ]);

} ```

## Fields

`end` | The upper bound of the range (exclusive).

## Methods

### `impl<Idx: PartialOrd<Idx>> RangeTo<Idx>`
[src]

#### `fn contains(&self, item: Idx) -> bool`

Unstable (`range_contains` #32311)

: recently added as per RFC

# Examples

#![feature(range_contains)] fn main() { assert!( (..5).contains(-1_000_000_000)); assert!( (..5).contains(4)); assert!( ! (..5).contains(5)); }

    #![feature(range_contains)]
    fn main() {
        assert!(   (..5).contains(-1_000_000_000));
        assert!(   (..5).contains(4));
        assert!( ! (..5).contains(5));
    }

## Trait Implementations

### `impl<Idx: Debug> Debug for RangeTo<Idx>`
[src]

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

### Derived Implementations

### `impl<Idx: Eq> Eq for RangeTo<Idx>`
[src]

### `impl<Idx: PartialEq> PartialEq for RangeTo<Idx>`
[src]

#### `fn eq(&self, __arg_0: &RangeTo<Idx>) -> bool`

#### `fn ne(&self, __arg_0: &RangeTo<Idx>) -> bool`

### `impl<Idx: Clone> Clone for RangeTo<Idx>`
[src]

#### `fn clone(&self) -> RangeTo<Idx>`

#### `fn clone_from(&mut self, source: &Self)`

### `impl<Idx: Copy> Copy for RangeTo<Idx>`
[src]

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