8fb98ef368
This handles various kinds of errors, but does not allow applying the derive yet. This adds the feature gate `macro_derive`.
20 lines
424 B
Rust
20 lines
424 B
Rust
#![crate_type = "lib"]
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#![feature(macro_attr)]
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macro_rules! attr {
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attr[$($args:tt)*] { $($body:tt)* } => {
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//~^ ERROR: `attr` rule argument matchers require parentheses
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//~v ERROR: attr:
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compile_error!(concat!(
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"attr: args=\"",
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stringify!($($args)*),
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"\" body=\"",
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stringify!($($body)*),
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"\"",
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));
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};
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}
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#[attr]
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struct S;
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