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08351004125c4d49aa757f2c3ec2340f7469ea91
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test
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ui
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deref-mut-on-ref.rs
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// run-pass
// Test that `&mut T` implements `DerefMut<T>`
use
std
::
ops
::{
Deref
,
DerefMut
};
fn
inc
<
T
:
Deref
<
Target
=
isize
>
+
DerefMut
>(
mut
t
:
T
)
{
*
t
+=
1
;
}
fn
main
()
{
let
mut
x
:
isize
=
5
;
inc
(&
mut
x
);
assert_eq
!(
x
,
6
);
}