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89a3c19832
``` error[E0599]: no method named `map` found for struct `Vec<bool>` in the current scope --> $DIR/vec-on-unimplemented.rs:3:23 | LL | vec![true, false].map(|v| !v).collect::<Vec<_>>(); | ^^^ `Vec<bool>` is not an iterator | help: call `.into_iter()` first | LL | vec![true, false].into_iter().map(|v| !v).collect::<Vec<_>>(); | ++++++++++++ ``` We used to provide some help through `rustc_on_unimplemented` on non-`impl Trait` and non-type-params, but this lets us get rid of some otherwise unnecessary conditions in the annotation on `Iterator`.
9 lines
160 B
Rust
9 lines
160 B
Rust
//@ run-rustfix
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fn get_slice() -> &'static [i32] {
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&[1, 2, 3, 4]
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}
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fn main() {
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let _sqsum: i32 = get_slice().map(|i| i * i).sum(); //~ ERROR [E0599]
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}
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