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Fix {,e}println!() #3209

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Merged
merged 2 commits into from
May 29, 2024
Merged

Fix {,e}println!() #3209

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11b77e8
Fix `{,e}println!()`
GrigorenkoPV May 28, 2024
a609bb8
Add a test for `{,e}println!()`
GrigorenkoPV May 29, 2024
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4 changes: 2 additions & 2 deletions library/std/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -135,14 +135,14 @@ macro_rules! eprint {
#[cfg(not(feature = "concrete_playback"))]
#[macro_export]
macro_rules! println {
() => { };
() => { $crate::print!("\n") };
($($x:tt)*) => {{ let _ = format_args!($($x)*); }};
}

#[cfg(not(feature = "concrete_playback"))]
#[macro_export]
macro_rules! eprintln {
() => { };
() => { $crate::eprint!("\n") };
($($x:tt)*) => {{ let _ = format_args!($($x)*); }};
}

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17 changes: 17 additions & 0 deletions tests/kani/Print/no_semicolon.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
// Copyright Kani Contributors
// SPDX-License-Identifier: Apache-2.0 OR MIT

// This test checks that the (e)println with no arguments do not require a trailing semicolon

fn println() {
println!()
}
fn eprintln() {
eprintln!()
}

#[kani::proof]
fn main() {
println();
eprintln();
}