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Apr 20, 2023
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cmp doc examples improvements #110448

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91 changes: 46 additions & 45 deletions library/core/src/cmp.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -324,14 +324,11 @@ pub struct AssertParamIsEq<T: Eq + ?Sized> {
/// ```
/// use std::cmp::Ordering;
///
/// let result = 1.cmp(&2);
/// assert_eq!(Ordering::Less, result);
/// assert_eq!(1.cmp(&2), Ordering::Less);
///
/// let result = 1.cmp(&1);
/// assert_eq!(Ordering::Equal, result);
/// assert_eq!(1.cmp(&1), Ordering::Equal);
///
/// let result = 2.cmp(&1);
/// assert_eq!(Ordering::Greater, result);
/// assert_eq!(2.cmp(&1), Ordering::Greater);
/// ```
#[derive(Clone, Copy, Eq, Debug, Hash)]
#[derive_const(PartialOrd, Ord, PartialEq)]
Expand Down Expand Up @@ -790,8 +787,8 @@ pub trait Ord: Eq + PartialOrd<Self> {
/// # Examples
///
/// ```
/// assert_eq!(2, 1.max(2));
/// assert_eq!(2, 2.max(2));
/// assert_eq!(1.max(2), 2);
/// assert_eq!(2.max(2), 2);
/// ```
#[stable(feature = "ord_max_min", since = "1.21.0")]
#[inline]
Expand All @@ -811,8 +808,8 @@ pub trait Ord: Eq + PartialOrd<Self> {
/// # Examples
///
/// ```
/// assert_eq!(1, 1.min(2));
/// assert_eq!(2, 2.min(2));
/// assert_eq!(1.min(2), 1);
/// assert_eq!(2.min(2), 2);
/// ```
#[stable(feature = "ord_max_min", since = "1.21.0")]
#[inline]
Expand All @@ -837,9 +834,9 @@ pub trait Ord: Eq + PartialOrd<Self> {
/// # Examples
///
/// ```
/// assert!((-3).clamp(-2, 1) == -2);
/// assert!(0.clamp(-2, 1) == 0);
/// assert!(2.clamp(-2, 1) == 1);
/// assert_eq!((-3).clamp(-2, 1), -2);
/// assert_eq!(0.clamp(-2, 1), 0);
/// assert_eq!(2.clamp(-2, 1), 1);
/// ```
#[must_use]
#[stable(feature = "clamp", since = "1.50.0")]
Expand Down Expand Up @@ -1070,11 +1067,9 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
/// # Examples
///
/// ```
/// let result = 1.0 < 2.0;
/// assert_eq!(result, true);
///
/// let result = 2.0 < 1.0;
/// assert_eq!(result, false);
/// assert_eq!(1.0 < 1.0, false);
/// assert_eq!(1.0 < 2.0, true);
/// assert_eq!(2.0 < 1.0, false);
/// ```
#[inline]
#[must_use]
Expand All @@ -1089,11 +1084,9 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
/// # Examples
///
/// ```
/// let result = 1.0 <= 2.0;
/// assert_eq!(result, true);
///
/// let result = 2.0 <= 2.0;
/// assert_eq!(result, true);
/// assert_eq!(1.0 <= 1.0, true);
/// assert_eq!(1.0 <= 2.0, true);
/// assert_eq!(2.0 <= 1.0, false);
/// ```
#[inline]
#[must_use]
Expand All @@ -1107,11 +1100,9 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
/// # Examples
///
/// ```
/// let result = 1.0 > 2.0;
/// assert_eq!(result, false);
///
/// let result = 2.0 > 2.0;
/// assert_eq!(result, false);
/// assert_eq!(1.0 > 1.0, false);
/// assert_eq!(1.0 > 2.0, false);
/// assert_eq!(2.0 > 1.0, true);
/// ```
#[inline]
#[must_use]
Expand All @@ -1126,11 +1117,9 @@ pub trait PartialOrd<Rhs: ?Sized = Self>: PartialEq<Rhs> {
/// # Examples
///
/// ```
/// let result = 2.0 >= 1.0;
/// assert_eq!(result, true);
///
/// let result = 2.0 >= 2.0;
/// assert_eq!(result, true);
/// assert_eq!(1.0 >= 1.0, true);
/// assert_eq!(1.0 >= 2.0, false);
/// assert_eq!(2.0 >= 1.0, true);
/// ```
#[inline]
#[must_use]
Expand Down Expand Up @@ -1160,8 +1149,8 @@ pub macro PartialOrd($item:item) {
/// ```
/// use std::cmp;
///
/// assert_eq!(1, cmp::min(1, 2));
/// assert_eq!(2, cmp::min(2, 2));
/// assert_eq!(cmp::min(1, 2), 1);
/// assert_eq!(cmp::min(2, 2), 2);
/// ```
#[inline]
#[must_use]
Expand All @@ -1181,8 +1170,11 @@ pub const fn min<T: ~const Ord + ~const Destruct>(v1: T, v2: T) -> T {
/// ```
/// use std::cmp;
///
/// assert_eq!(cmp::min_by(-2, 1, |x: &i32, y: &i32| x.abs().cmp(&y.abs())), 1);
/// assert_eq!(cmp::min_by(-2, 2, |x: &i32, y: &i32| x.abs().cmp(&y.abs())), -2);
/// let result = cmp::min_by(-2, 1, |x: &i32, y: &i32| x.abs().cmp(&y.abs()));
/// assert_eq!(result, 1);
///
/// let result = cmp::min_by(-2, 3, |x: &i32, y: &i32| x.abs().cmp(&y.abs()));
/// assert_eq!(result, -2);
/// ```
#[inline]
#[must_use]
Expand All @@ -1208,8 +1200,11 @@ where
/// ```
/// use std::cmp;
///
/// assert_eq!(cmp::min_by_key(-2, 1, |x: &i32| x.abs()), 1);
/// assert_eq!(cmp::min_by_key(-2, 2, |x: &i32| x.abs()), -2);
/// let result = cmp::min_by_key(-2, 1, |x: &i32| x.abs());
/// assert_eq!(result, 1);
///
/// let result = cmp::min_by_key(-2, 2, |x: &i32| x.abs());
/// assert_eq!(result, -2);
/// ```
#[inline]
#[must_use]
Expand All @@ -1235,8 +1230,8 @@ where
/// ```
/// use std::cmp;
///
/// assert_eq!(2, cmp::max(1, 2));
/// assert_eq!(2, cmp::max(2, 2));
/// assert_eq!(cmp::max(1, 2), 2);
/// assert_eq!(cmp::max(2, 2), 2);
/// ```
#[inline]
#[must_use]
Expand All @@ -1256,8 +1251,11 @@ pub const fn max<T: ~const Ord + ~const Destruct>(v1: T, v2: T) -> T {
/// ```
/// use std::cmp;
///
/// assert_eq!(cmp::max_by(-2, 1, |x: &i32, y: &i32| x.abs().cmp(&y.abs())), -2);
/// assert_eq!(cmp::max_by(-2, 2, |x: &i32, y: &i32| x.abs().cmp(&y.abs())), 2);
/// let result = cmp::max_by(-2, 1, |x: &i32, y: &i32| x.abs().cmp(&y.abs()));
/// assert_eq!(result, -2);
///
/// let result = cmp::max_by(-2, 2, |x: &i32, y: &i32| x.abs().cmp(&y.abs())) ;
/// assert_eq!(result, 2);
/// ```
#[inline]
#[must_use]
Expand All @@ -1283,8 +1281,11 @@ where
/// ```
/// use std::cmp;
///
/// assert_eq!(cmp::max_by_key(-2, 1, |x: &i32| x.abs()), -2);
/// assert_eq!(cmp::max_by_key(-2, 2, |x: &i32| x.abs()), 2);
/// let result = cmp::max_by_key(-2, 1, |x: &i32| x.abs());
/// assert_eq!(result, -2);
///
/// let result = cmp::max_by_key(-2, 2, |x: &i32| x.abs());
/// assert_eq!(result, 2);
/// ```
#[inline]
#[must_use]
Expand Down