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Diffstat (limited to 'samples/test/scoping_rules.rs')
-rw-r--r-- | samples/test/scoping_rules.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/samples/test/scoping_rules.rs b/samples/test/scoping_rules.rs new file mode 100644 index 00000000..9878fd16 --- /dev/null +++ b/samples/test/scoping_rules.rs @@ -0,0 +1,21 @@ + +struct DropFlag<'a>(&'a ::std::cell::Cell<i32>); +impl<'a> ::std::ops::Drop for DropFlag<'a> +{ + fn drop(&mut self) { + self.0.set( self.0.get() + 1 ); + } +} + +// Any temporaries defined in the expression part of a statement (i.e. in the yeilded part of a +// block) are stored in the parent scope. +#[test] +fn temporaries_in_yielded_expr() +{ + let drop_count = ::std::cell::Cell::new(0); + let _foo = ({ DropFlag(&drop_count).0 }, assert_eq!(drop_count.get(), 0) ); + drop(_foo); + assert_eq!(drop_count.get(), 1); +} + + |