12 lines
435 B
Plaintext
12 lines
435 B
Plaintext
error[E0658]: using the `?` macro Kleene operator for "at most one" repetition is unstable (see issue #48075)
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--> $DIR/feature-gate-macro_at_most_once_rep.rs:14:20
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LL | macro_rules! m { ($(a)?) => {} }
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| ^^^
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= help: add #![feature(macro_at_most_once_rep)] to the crate attributes to enable
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0658`.
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