diff options
Diffstat (limited to 'tests/ui/closures/2229_closure_analysis/run_pass/filter-on-struct-member.rs')
-rw-r--r-- | tests/ui/closures/2229_closure_analysis/run_pass/filter-on-struct-member.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tests/ui/closures/2229_closure_analysis/run_pass/filter-on-struct-member.rs b/tests/ui/closures/2229_closure_analysis/run_pass/filter-on-struct-member.rs new file mode 100644 index 000000000..e19f5ff1b --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/run_pass/filter-on-struct-member.rs @@ -0,0 +1,37 @@ +// edition:2021 +// run-pass + +// Test disjoint capture within an impl block + +struct Filter { + div: i32, +} +impl Filter { + fn allowed(&self, x: i32) -> bool { + x % self.div == 1 + } +} + +struct Data { + filter: Filter, + list: Vec<i32>, +} +impl Data { + fn update(&mut self) { + // The closure passed to filter only captures self.filter, + // therefore mutating self.list is allowed. + self.list.retain( + |v| self.filter.allowed(*v), + ); + } +} + +fn main() { + let mut d = Data { filter: Filter { div: 3 }, list: Vec::new() }; + + for i in 1..10 { + d.list.push(i); + } + + d.update(); +} |