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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>
33 lines
806 B
Plaintext
33 lines
806 B
Plaintext
error: functions cannot be both `const` and `gen`
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--> $DIR/const_gen_fn.rs:5:1
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LL | const gen fn a() {}
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| ^^^^^-^^^----------
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| | |
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| | `gen` because of this
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| `const` because of this
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error: functions cannot be both `const` and `async gen`
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--> $DIR/const_gen_fn.rs:9:1
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LL | const async gen fn b() {}
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| ^^^^^-^^^^^^^^^----------
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| | `async gen` because of this
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| `const` because of this
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error: `gen` fn bodies are not allowed in constant functions
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--> $DIR/const_gen_fn.rs:5:18
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LL | const gen fn a() {}
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| ^^
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error: `async gen` fn bodies are not allowed in constant functions
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--> $DIR/const_gen_fn.rs:9:24
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LL | const async gen fn b() {}
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| ^^
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error: aborting due to 4 previous errors
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