diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/ui/lint/unused/must-use-macros.fixed | 60 | ||||
| -rw-r--r-- | tests/ui/lint/unused/must-use-macros.rs | 60 | ||||
| -rw-r--r-- | tests/ui/lint/unused/must-use-macros.stderr | 48 | ||||
| -rw-r--r-- | tests/ui/macros/must-use-in-macro-55516.stderr | 5 |
4 files changed, 172 insertions, 1 deletions
diff --git a/tests/ui/lint/unused/must-use-macros.fixed b/tests/ui/lint/unused/must-use-macros.fixed new file mode 100644 index 00000000000..609d0c6392b --- /dev/null +++ b/tests/ui/lint/unused/must-use-macros.fixed @@ -0,0 +1,60 @@ +// Makes sure the suggestions of the `unused_must_use` lint are not inside +// +// See <https://github.com/rust-lang/rust/issues/143025> + +//@ check-pass +//@ run-rustfix + +#![expect(unused_macros)] +#![warn(unused_must_use)] + +fn main() { + { + macro_rules! cmp { + ($a:tt, $b:tt) => { + $a == $b + }; + } + + // FIXME(Urgau): For some unknown reason the spans we get are not + // recorded to be from any expansions, preventing us from either + // suggesting in front of the macro or not at all. + // cmp!(1, 1); + } + + { + macro_rules! cmp { + ($a:ident, $b:ident) => { + $a == $b + }; //~^ WARN unused comparison that must be used + } + + let a = 1; + let b = 1; + let _ = cmp!(a, b); + //~^ SUGGESTION let _ + } + + { + macro_rules! cmp { + ($a:expr, $b:expr) => { + $a == $b + }; //~^ WARN unused comparison that must be used + } + + let _ = cmp!(1, 1); + //~^ SUGGESTION let _ + } + + { + macro_rules! cmp { + ($a:tt, $b:tt) => { + $a.eq(&$b) + }; + } + + let _ = cmp!(1, 1); + //~^ WARN unused return value + //~| SUGGESTION let _ + } +} diff --git a/tests/ui/lint/unused/must-use-macros.rs b/tests/ui/lint/unused/must-use-macros.rs new file mode 100644 index 00000000000..63e246ed374 --- /dev/null +++ b/tests/ui/lint/unused/must-use-macros.rs @@ -0,0 +1,60 @@ +// Makes sure the suggestions of the `unused_must_use` lint are not inside +// +// See <https://github.com/rust-lang/rust/issues/143025> + +//@ check-pass +//@ run-rustfix + +#![expect(unused_macros)] +#![warn(unused_must_use)] + +fn main() { + { + macro_rules! cmp { + ($a:tt, $b:tt) => { + $a == $b + }; + } + + // FIXME(Urgau): For some unknown reason the spans we get are not + // recorded to be from any expansions, preventing us from either + // suggesting in front of the macro or not at all. + // cmp!(1, 1); + } + + { + macro_rules! cmp { + ($a:ident, $b:ident) => { + $a == $b + }; //~^ WARN unused comparison that must be used + } + + let a = 1; + let b = 1; + cmp!(a, b); + //~^ SUGGESTION let _ + } + + { + macro_rules! cmp { + ($a:expr, $b:expr) => { + $a == $b + }; //~^ WARN unused comparison that must be used + } + + cmp!(1, 1); + //~^ SUGGESTION let _ + } + + { + macro_rules! cmp { + ($a:tt, $b:tt) => { + $a.eq(&$b) + }; + } + + cmp!(1, 1); + //~^ WARN unused return value + //~| SUGGESTION let _ + } +} diff --git a/tests/ui/lint/unused/must-use-macros.stderr b/tests/ui/lint/unused/must-use-macros.stderr new file mode 100644 index 00000000000..2ad174e10b5 --- /dev/null +++ b/tests/ui/lint/unused/must-use-macros.stderr @@ -0,0 +1,48 @@ +warning: unused comparison that must be used + --> $DIR/must-use-macros.rs:28:17 + | +LL | $a == $b + | ^^^^^^^^ the comparison produces a value +... +LL | cmp!(a, b); + | ---------- in this macro invocation + | +note: the lint level is defined here + --> $DIR/must-use-macros.rs:9:9 + | +LL | #![warn(unused_must_use)] + | ^^^^^^^^^^^^^^^ + = note: this warning originates in the macro `cmp` (in Nightly builds, run with -Z macro-backtrace for more info) +help: use `let _ = ...` to ignore the resulting value + | +LL | let _ = cmp!(a, b); + | +++++++ + +warning: unused comparison that must be used + --> $DIR/must-use-macros.rs:41:17 + | +LL | $a == $b + | ^^^^^^^^ the comparison produces a value +... +LL | cmp!(1, 1); + | ---------- in this macro invocation + | + = note: this warning originates in the macro `cmp` (in Nightly builds, run with -Z macro-backtrace for more info) +help: use `let _ = ...` to ignore the resulting value + | +LL | let _ = cmp!(1, 1); + | +++++++ + +warning: unused return value of `std::cmp::PartialEq::eq` that must be used + --> $DIR/must-use-macros.rs:56:9 + | +LL | cmp!(1, 1); + | ^^^^^^^^^^ + | +help: use `let _ = ...` to ignore the resulting value + | +LL | let _ = cmp!(1, 1); + | +++++++ + +warning: 3 warnings emitted + diff --git a/tests/ui/macros/must-use-in-macro-55516.stderr b/tests/ui/macros/must-use-in-macro-55516.stderr index 7bf4aaab51c..b93d40d7e5a 100644 --- a/tests/ui/macros/must-use-in-macro-55516.stderr +++ b/tests/ui/macros/must-use-in-macro-55516.stderr @@ -7,7 +7,10 @@ LL | write!(&mut example, "{}", 42); = note: this `Result` may be an `Err` variant, which should be handled = note: `-W unused-must-use` implied by `-W unused` = help: to override `-W unused` add `#[allow(unused_must_use)]` - = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) +help: use `let _ = ...` to ignore the resulting value + | +LL | let _ = write!(&mut example, "{}", 42); + | +++++++ warning: 1 warning emitted |