diff options
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.rs | 10 | ||||
| -rw-r--r-- | src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.stderr | 34 |
2 files changed, 34 insertions, 10 deletions
diff --git a/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.rs b/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.rs index 7eb4c32972a..3741ba4f3ae 100644 --- a/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.rs +++ b/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.rs @@ -11,6 +11,7 @@ #![feature(fn_must_use)] #![warn(unused_must_use)] +#[derive(PartialEq, Eq)] struct MyStruct { n: usize, } @@ -58,13 +59,18 @@ fn main() { need_to_use_this_value(); let mut m = MyStruct { n: 2 }; + let n = MyStruct { n: 3 }; + m.need_to_use_this_method_value(); m.is_even(); // trait method! - m.replace(3); + m.replace(3); // won't warn (annotation needs to be in trait definition) + // comparison methods are `must_use` 2.eq(&3); + m.eq(&n); - // FIXME: operators should probably be `must_use` if underlying method is + // lint includes comparison operators 2 == 3; + m == n; } diff --git a/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.stderr b/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.stderr index 69755c89b48..fdd0a591bc7 100644 --- a/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.stderr +++ b/src/test/ui/rfc_1940-must_use_on_functions/fn_must_use.stderr @@ -1,7 +1,7 @@ warning: unused return value of `need_to_use_this_value` which must be used: it's important - --> $DIR/fn_must_use.rs:58:5 + --> $DIR/fn_must_use.rs:59:5 | -58 | need_to_use_this_value(); +59 | need_to_use_this_value(); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | note: lint level defined here @@ -11,20 +11,38 @@ note: lint level defined here | ^^^^^^^^^^^^^^^ warning: unused return value of `MyStruct::need_to_use_this_method_value` which must be used - --> $DIR/fn_must_use.rs:61:5 + --> $DIR/fn_must_use.rs:64:5 | -61 | m.need_to_use_this_method_value(); +64 | m.need_to_use_this_method_value(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ warning: unused return value of `EvenNature::is_even` which must be used: no side effects - --> $DIR/fn_must_use.rs:62:5 + --> $DIR/fn_must_use.rs:65:5 | -62 | m.is_even(); // trait method! +65 | m.is_even(); // trait method! | ^^^^^^^^^^^^ warning: unused return value of `std::cmp::PartialEq::eq` which must be used - --> $DIR/fn_must_use.rs:66:5 + --> $DIR/fn_must_use.rs:70:5 | -66 | 2.eq(&3); +70 | 2.eq(&3); | ^^^^^^^^^ +warning: unused return value of `std::cmp::PartialEq::eq` which must be used + --> $DIR/fn_must_use.rs:71:5 + | +71 | m.eq(&n); + | ^^^^^^^^^ + +warning: unused comparison which must be used + --> $DIR/fn_must_use.rs:74:5 + | +74 | 2 == 3; + | ^^^^^^ + +warning: unused comparison which must be used + --> $DIR/fn_must_use.rs:75:5 + | +75 | m == n; + | ^^^^^^ + |