mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 01:04:03 +00:00
98 lines
2.6 KiB
Plaintext
98 lines
2.6 KiB
Plaintext
warning: unused return value of `need_to_use_this_value` that must be used
|
|
--> $DIR/fn_must_use.rs:55:5
|
|
|
|
|
LL | need_to_use_this_value();
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= note: it's important
|
|
note: the lint level is defined here
|
|
--> $DIR/fn_must_use.rs:3:9
|
|
|
|
|
LL | #![warn(unused_must_use)]
|
|
| ^^^^^^^^^^^^^^^
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = need_to_use_this_value();
|
|
| +++++++
|
|
|
|
warning: unused return value of `MyStruct::need_to_use_this_method_value` that must be used
|
|
--> $DIR/fn_must_use.rs:60:5
|
|
|
|
|
LL | m.need_to_use_this_method_value();
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = m.need_to_use_this_method_value();
|
|
| +++++++
|
|
|
|
warning: unused return value of `EvenNature::is_even` that must be used
|
|
--> $DIR/fn_must_use.rs:61:5
|
|
|
|
|
LL | m.is_even(); // trait method!
|
|
| ^^^^^^^^^^^
|
|
|
|
|
= note: no side effects
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = m.is_even(); // trait method!
|
|
| +++++++
|
|
|
|
warning: unused return value of `MyStruct::need_to_use_this_associated_function_value` that must be used
|
|
--> $DIR/fn_must_use.rs:64:5
|
|
|
|
|
LL | MyStruct::need_to_use_this_associated_function_value();
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = MyStruct::need_to_use_this_associated_function_value();
|
|
| +++++++
|
|
|
|
warning: unused return value of `std::cmp::PartialEq::eq` that must be used
|
|
--> $DIR/fn_must_use.rs:70:5
|
|
|
|
|
LL | 2.eq(&3);
|
|
| ^^^^^^^^
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = 2.eq(&3);
|
|
| +++++++
|
|
|
|
warning: unused return value of `std::cmp::PartialEq::eq` that must be used
|
|
--> $DIR/fn_must_use.rs:71:5
|
|
|
|
|
LL | m.eq(&n);
|
|
| ^^^^^^^^
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = m.eq(&n);
|
|
| +++++++
|
|
|
|
warning: unused comparison that must be used
|
|
--> $DIR/fn_must_use.rs:74:5
|
|
|
|
|
LL | 2 == 3;
|
|
| ^^^^^^ the comparison produces a value
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = 2 == 3;
|
|
| +++++++
|
|
|
|
warning: unused comparison that must be used
|
|
--> $DIR/fn_must_use.rs:75:5
|
|
|
|
|
LL | m == n;
|
|
| ^^^^^^ the comparison produces a value
|
|
|
|
|
help: use `let _ = ...` to ignore the resulting value
|
|
|
|
|
LL | let _ = m == n;
|
|
| +++++++
|
|
|
|
warning: 8 warnings emitted
|
|
|