     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50

    // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
    // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
    // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
    // option. This file may not be copied, modified, or distributed
    // except according to those terms.

    /// This module just implements a simple verison of step_by() since
    /// the function from the standard library is currently unstable.
    /// This should be removed once that function becomes stable.

    use std::ops::{Add, Range};

    #[derive(Clone)]
    pub struct StepUp<T> {
        next: T,
        end: T,
        ammount: T
    }

    impl <T> Iterator for StepUp<T> where
            T: Add<T, Output = T> + PartialOrd + Copy {
        type Item = T;

        #[inline]
        fn next(&mut self) -> Option<T> {
            if self.next < self.end {
                let n = self.next;
                self.next = self.next + self.ammount;
                Some(n)
            } else {
                None
            }
        }
    }

    pub trait RangeExt<T> {
        fn step_up(self, ammount: T) -> StepUp<T>;
    }

    impl <T> RangeExt<T> for Range<T> where
            T: Add<T, Output = T> + PartialOrd + Copy {
        fn step_up(self, ammount: T) -> StepUp<T> {
            StepUp {
                next: self.start,
                end: self.end,
                ammount: ammount
            }
        }
    }

# 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`)