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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/nll/polonius/polonius-smoke-test.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/nll/polonius/polonius-smoke-test.rs')
-rw-r--r-- | src/test/ui/nll/polonius/polonius-smoke-test.rs | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/nll/polonius/polonius-smoke-test.rs b/src/test/ui/nll/polonius/polonius-smoke-test.rs new file mode 100644 index 000000000..c4344af71 --- /dev/null +++ b/src/test/ui/nll/polonius/polonius-smoke-test.rs @@ -0,0 +1,46 @@ +// Check that Polonius borrow check works for simple cases. +// compile-flags: -Z polonius + +pub fn return_ref_to_local() -> &'static i32 { + let x = 0; + &x //~ ERROR +} + +pub fn use_while_mut() { + let mut x = 0; + let y = &mut x; + let z = x; //~ ERROR + let w = y; +} + +pub fn use_while_mut_fr(x: &mut i32) -> &mut i32 { + let y = &mut *x; + let z = x; //~ ERROR + y +} + +// Cases like this are why we have Polonius. +pub fn position_dependent_outlives(x: &mut i32, cond: bool) -> &mut i32 { + let y = &mut *x; + if cond { + return y; + } else { + *x = 0; + return x; + } +} + +fn foo<'a, 'b>(p: &'b &'a mut usize) -> &'b usize { + p +} + +// Check that we create constraints for well-formedness of function arguments +fn well_formed_function_inputs() { + let s = &mut 1; + let r = &mut *s; + let tmp = foo(&r); + s; //~ ERROR + tmp; +} + +fn main() {} |