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This adds an `iter!` macro that can be used to create movable generators. This also adds a yield_expr feature so the `yield` keyword can be used within iter! macro bodies. This was needed because several unstable features each need `yield` expressions, so this allows us to stabilize them separately from any individual feature. Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de> Co-authored-by: Jieyou Xu <jieyouxu@outlook.com> Co-authored-by: Travis Cross <tc@traviscross.com>
26 lines
837 B
Plaintext
26 lines
837 B
Plaintext
error[E0382]: use of moved value: `f`
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--> $DIR/generator_capture_.rs:21:17
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LL | let f = {
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| - move occurs because `f` has type `{gen closure@$DIR/generator_capture_.rs:10:17: 10:24}`, which does not implement the `Copy` trait
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...
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LL | let mut i = f();
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| --- `f` moved due to this call
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...
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LL | let mut i = f();
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| ^ value used here after move
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note: this value implements `FnOnce`, which causes it to be moved when called
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--> $DIR/generator_capture_.rs:16:17
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LL | let mut i = f();
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| ^
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help: consider cloning the value if the performance cost is acceptable
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LL | let mut i = f.clone()();
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| ++++++++
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error: aborting due to 1 previous error
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For more information about this error, try `rustc --explain E0382`.
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