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faf59853
编写于
8月 29, 2021
作者:
J
João M. Bezerra
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差异文件
Adding examples to docs of std::time module
And adding missing link to Duration from Instant
上级
daa4dc99
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
37 addition
and
11 deletion
+37
-11
library/core/src/time.rs
library/core/src/time.rs
+12
-5
library/std/src/time.rs
library/std/src/time.rs
+25
-6
未找到文件。
library/core/src/time.rs
浏览文件 @
faf59853
...
...
@@ -2,14 +2,21 @@
//! Temporal quantification.
//!
//! Example:
//! # Examples:
//!
//! There are multiple ways to create a new [`Duration`]:
//!
//! ```
//! use std::time::Duration;
//! # use std::time::Duration;
//! let five_seconds = Duration::from_secs(5);
//! assert_eq!(five_seconds, Duration::from_millis(5_000));
//! assert_eq!(five_seconds, Duration::from_micros(5_000_000));
//! assert_eq!(five_seconds, Duration::from_nanos(5_000_000_000));
//!
//! let five_seconds = Duration::new(5, 0);
//! // both declarations are equivalent
//! assert_eq!(Duration::new(5, 0), Duration::from_secs(5));
//! let ten_seconds = Duration::from_secs(10);
//! let seven_nanos = Duration::from_nanos(7);
//! let total = ten_seconds + seven_nanos;
//! assert_eq!(total, Duration::new(10, 7));
//! ```
use
crate
::
fmt
;
...
...
library/std/src/time.rs
浏览文件 @
faf59853
//! Temporal quantification.
//!
//!
Example
:
//!
# Examples
:
//!
//! There are multiple ways to create a new [`Duration`]:
//!
//! ```
//! # use std::time::Duration;
//! let five_seconds = Duration::from_secs(5);
//! assert_eq!(five_seconds, Duration::from_millis(5_000));
//! assert_eq!(five_seconds, Duration::from_micros(5_000_000));
//! assert_eq!(five_seconds, Duration::from_nanos(5_000_000_000));
//!
//! let ten_seconds = Duration::from_secs(10);
//! let seven_nanos = Duration::from_nanos(7);
//! let total = ten_seconds + seven_nanos;
//! assert_eq!(total, Duration::new(10, 7));
//! ```
//! use std::time::Duration;
//!
//! let five_seconds = Duration::new(5, 0);
//! // both declarations are equivalent
//! assert_eq!(Duration::new(5, 0), Duration::from_secs(5));
//! Using [`Instant`] to calculate how long a function took to run:
//!
//! ```ignore (incomplete)
//! let now = Instant::now();
//!
//! // Calling a slow function, it may take a while
//! slow_function();
//!
//! let elapsed_time = now.elapsed();
//! println!("Running slow_function() took {} seconds.", elapsed_time.as_secs());
//! ```
#![stable(feature
=
"time"
,
since
=
"1.3.0"
)]
...
...
@@ -26,7 +45,7 @@
pub
use
core
::
time
::
Duration
;
/// A measurement of a monotonically nondecreasing clock.
/// Opaque and useful only with
`Duration`
.
/// Opaque and useful only with
[`Duration`]
.
///
/// Instants are always guaranteed to be no less than any previously measured
/// instant when created, and are often useful for tasks such as measuring
...
...
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