diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/consts/control-flow/interior-mutability.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/consts/control-flow/interior-mutability.rs')
-rw-r--r-- | tests/ui/consts/control-flow/interior-mutability.rs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/tests/ui/consts/control-flow/interior-mutability.rs b/tests/ui/consts/control-flow/interior-mutability.rs new file mode 100644 index 000000000..a6d44237b --- /dev/null +++ b/tests/ui/consts/control-flow/interior-mutability.rs @@ -0,0 +1,43 @@ +// Ensure that *any* assignment to the return place of a value with interior mutability +// disqualifies it from promotion. + +use std::cell::Cell; + +const X: Option<Cell<i32>> = { + let mut x = None; + if false { + x = Some(Cell::new(4)); + } + x +}; + +const Y: Option<Cell<i32>> = { + let mut y = Some(Cell::new(4)); + if true { + y = None; + } + y +}; + +const Z: Option<Cell<i32>> = { + let mut z = None; + let mut i = 0; + while i < 10 { + if i == 8 { + z = Some(Cell::new(4)); + } + + if i == 9 { + z = None; + } + + i += 1; + } + z +}; + +fn main() { + let x: &'static _ = &X; //~ ERROR temporary value dropped while borrowed + let y: &'static _ = &Y; //~ ERROR temporary value dropped while borrowed + let z: &'static _ = &Z; //~ ERROR temporary value dropped while borrowed +} |