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Namely, use a more sensical primary span. Don't pretty-print AST nodes for the diagnostic message. Why: * It's lossy (e.g., it doesn't replicate trailing `+`s in trait objects. * It's prone to leak error nodes (printed as `(/*ERROR*/)`) since the LHS can easily represent recovered code (e.g., `fn(i32?) + T`).
13 lines
477 B
Rust
13 lines
477 B
Rust
#![feature(auto_traits)]
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#![feature(negative_impls)]
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#![allow(bare_trait_objects)]
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auto trait Auto {}
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fn main() {
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let _: Box<((Auto)) + Auto>; //~ ERROR expected a path on the left-hand side of `+`
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let _: Box<(Auto + Auto) + Auto>; //~ ERROR expected a path on the left-hand side of `+`
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let _: Box<(Auto +) + Auto>; //~ ERROR expected a path on the left-hand side of `+`
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let _: Box<(dyn Auto) + Auto>; //~ ERROR expected a path on the left-hand side of `+`
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}
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