diff options
Diffstat (limited to '')
| -rw-r--r-- | library/core/src/fmt/mod.rs | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs index 372141e09..905212eb3 100644 --- a/library/core/src/fmt/mod.rs +++ b/library/core/src/fmt/mod.rs @@ -119,6 +119,10 @@ pub trait Write { /// /// This function will return an instance of [`Error`] on error. /// + /// The purpose of std::fmt::Error is to abort the formatting operation when the underlying + /// destination encounters some error preventing it from accepting more text; it should + /// generally be propagated rather than handled, at least when implementing formatting traits. + /// /// # Examples /// /// ``` @@ -1815,7 +1819,7 @@ impl<'a> Formatter<'a> { /// write!(formatter, /// "Foo({}{})", /// if self.0 < 0 { '-' } else { '+' }, - /// self.0) + /// self.0.abs()) /// } else { /// write!(formatter, "Foo({})", self.0) /// } @@ -1823,6 +1827,7 @@ impl<'a> Formatter<'a> { /// } /// /// assert_eq!(&format!("{:+}", Foo(23)), "Foo(+23)"); + /// assert_eq!(&format!("{:+}", Foo(-23)), "Foo(-23)"); /// assert_eq!(&format!("{}", Foo(23)), "Foo(23)"); /// ``` #[must_use] @@ -2562,7 +2567,7 @@ macro_rules! tuple { macro_rules! maybe_tuple_doc { ($a:ident @ #[$meta:meta] $item:item) => { - #[cfg_attr(not(bootstrap), doc(fake_variadic))] + #[doc(fake_variadic)] #[doc = "This trait is implemented for tuples up to twelve items long."] #[$meta] $item |