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Rollup merge of #58812 - jonhoo:floor_v_trunc, r=alexcrichton

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Clarify distinction between floor() and trunc()

`floor()` rounds towards `-INF`, `trunc()` rounds towards 0.
This PR clarifies this in the examples.
This commit is contained in:
Mazdak Farrokhzad 2019-03-19 15:16:50 +01:00 • committed by GitHub
commit 5abd9c7d15
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2 changed files with 16 additions and 8 deletions
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12
src/libstd/f32.rs
View file

@ -32,11 +32,13 @@ impl f32 {
/// # Examples
///
/// ```
/// let f = 3.99_f32;
/// let f = 3.7_f32;
/// let g = 3.0_f32;
/// let h = -3.7_f32;
///
/// assert_eq!(f.floor(), 3.0);
/// assert_eq!(g.floor(), 3.0);
/// assert_eq!(h.floor(), -4.0);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
@ -104,11 +106,13 @@ impl f32 {
/// # Examples
///
/// ```
/// let f = 3.3_f32;
/// let g = -3.7_f32;
/// let f = 3.7_f32;
/// let g = 3.0_f32;
/// let h = -3.7_f32;
///
/// assert_eq!(f.trunc(), 3.0);
/// assert_eq!(g.trunc(), -3.0);
/// assert_eq!(g.trunc(), 3.0);
/// assert_eq!(h.trunc(), -3.0);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]

12
src/libstd/f64.rs
View file

@ -32,11 +32,13 @@ impl f64 {
/// # Examples
///
/// ```
/// let f = 3.99_f64;
/// let f = 3.7_f64;
/// let g = 3.0_f64;
/// let h = -3.7_f64;
///
/// assert_eq!(f.floor(), 3.0);
/// assert_eq!(g.floor(), 3.0);
/// assert_eq!(h.floor(), -4.0);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]
@ -84,11 +86,13 @@ impl f64 {
/// # Examples
///
/// ```
/// let f = 3.3_f64;
/// let g = -3.7_f64;
/// let f = 3.7_f64;
/// let g = 3.0_f64;
/// let h = -3.7_f64;
///
/// assert_eq!(f.trunc(), 3.0);
/// assert_eq!(g.trunc(), -3.0);
/// assert_eq!(g.trunc(), 3.0);
/// assert_eq!(h.trunc(), -3.0);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[inline]