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Test ui suggestion fn trait notation
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19
src/test/ui/suggestions/fn-trait-notation.fixed
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src/test/ui/suggestions/fn-trait-notation.fixed
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// run-rustfix
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fn e0658<F, G, H>(f: F, g: G, h: H) -> i32
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where
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F: Fn(i32) -> i32, //~ ERROR E0658
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G: Fn(i32, i32) -> (i32, i32), //~ ERROR E0658
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H: Fn(i32) -> i32, //~ ERROR E0658
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{
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f(3);
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g(3, 4);
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h(3)
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}
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fn main() {
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e0658(
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|a| a,
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|a, b| (b, a),
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|a| a,
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);
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}
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src/test/ui/suggestions/fn-trait-notation.rs
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src/test/ui/suggestions/fn-trait-notation.rs
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// run-rustfix
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fn e0658<F, G, H>(f: F, g: G, h: H) -> i32
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where
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F: Fn<i32, Output = i32>, //~ ERROR E0658
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G: Fn<(i32, i32, ), Output = (i32, i32)>, //~ ERROR E0658
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H: Fn<(i32,), Output = i32>, //~ ERROR E0658
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{
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f(3);
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g(3, 4);
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h(3)
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}
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fn main() {
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e0658(
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|a| a,
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|a, b| (b, a),
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|a| a,
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);
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}
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src/test/ui/suggestions/fn-trait-notation.stderr
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src/test/ui/suggestions/fn-trait-notation.stderr
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/fn-trait-notation.rs:4:8
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LL | F: Fn<i32, Output = i32>,
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| ^^^^^^^^^^^^^^^^^^^^^ help: use parenthetical notation instead: `Fn(i32) -> i32`
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/fn-trait-notation.rs:5:8
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LL | G: Fn<(i32, i32, ), Output = (i32, i32)>,
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use parenthetical notation instead: `Fn(i32, i32) -> (i32, i32)`
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
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--> $DIR/fn-trait-notation.rs:6:8
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LL | H: Fn<(i32,), Output = i32>,
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: use parenthetical notation instead: `Fn(i32) -> i32`
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= note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
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= help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0658`.
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