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Make [e]println macros eagerly drop temporaries (for backport)

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David Tolnay 2022-04-26 15:16:23 -07:00
parent 69a5d2481e
commit 3a8f81aac9
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GPG key ID: F9BA143B95FF6D82
4 changed files with 9 additions and 9 deletions
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12
library/std/src/macros.rs
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@ -99,9 +99,9 @@ macro_rules! println {
() => { () => {
$crate::print!("\n") $crate::print!("\n")
}; };
($($arg:tt)*) => { ($($arg:tt)*) => {{
$crate::io::_print($crate::format_args_nl!($($arg)*)) $crate::io::_print($crate::format_args_nl!($($arg)*));
}; }};
} }
/// Prints to the standard error. /// Prints to the standard error.
@ -164,9 +164,9 @@ macro_rules! eprintln {
() => { () => {
$crate::eprint!("\n") $crate::eprint!("\n")
}; };
($($arg:tt)*) => { ($($arg:tt)*) => {{
$crate::io::_eprint($crate::format_args_nl!($($arg)*)) $crate::io::_eprint($crate::format_args_nl!($($arg)*));
}; }};
} }
/// Prints and returns the value of a given expression for quick and dirty /// Prints and returns the value of a given expression for quick and dirty

2
src/test/pretty/dollar-crate.pp
View file

@ -9,5 +9,5 @@ extern crate std;
// pp-exact:dollar-crate.pp // pp-exact:dollar-crate.pp
fn main() { fn main() {
::std::io::_print(::core::fmt::Arguments::new_v1(&["rust\n"], &[])); { ::std::io::_print(::core::fmt::Arguments::new_v1(&["rust\n"], &[])); };
} }

2
src/test/ui/macros/trace-macro.stderr
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@ -5,5 +5,5 @@ LL | println!("Hello, World!");
| ^^^^^^^^^^^^^^^^^^^^^^^^^ | ^^^^^^^^^^^^^^^^^^^^^^^^^
| |
= note: expanding `println! { "Hello, World!" }` = note: expanding `println! { "Hello, World!" }`
= note: to `$crate :: io :: _print($crate :: format_args_nl! ("Hello, World!"))` = note: to `{ $crate :: io :: _print($crate :: format_args_nl! ("Hello, World!")) ; }`

2
src/test/ui/pattern/usefulness/tuple-struct-nonexhaustive.stderr
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@ -12,7 +12,7 @@ LL | struct Foo(isize, isize);
= note: the matched value is of type `Foo` = note: the matched value is of type `Foo`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
| |
LL ~ Foo(2, b) => println!("{}", b), LL ~ Foo(2, b) => println!("{}", b)
LL + Foo(_, _) => todo!() LL + Foo(_, _) => todo!()
| |