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RangeFrom::step_by docs: fix example

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The previous example did not do what its description said. In it panicked on integer overflow in debug mode, and went into an infinite loop in release mode (wrapping back to 0 after printing 254).
This commit is contained in:
Simon Sapin 2016-01-25 00:56:34 +01:00
parent 1972c50b9e
commit 70d4f263ba
1 changed files with 5 additions and 3 deletions
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8
src/libcore/iter.rs
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@ -4252,13 +4252,15 @@ impl<A: Step> RangeFrom<A> {
///
/// # Examples
///
/// ```ignore
/// for i in (0u8..).step_by(2) {
/// ```
/// # #![feature(step_by)]
///
/// for i in (0u8..).step_by(2).take(10) {
/// println!("{}", i);
/// }
/// ```
///
/// This prints all even `u8` values.
/// This prints the first ten even natural integers (0 to 18).
#[unstable(feature = "step_by", reason = "recent addition",
issue = "27741")]
pub fn step_by(self, by: A) -> StepBy<A, Self> {