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Add a note about 2018e if someone uses try { in 2015e #58555

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Feb 23, 2019
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Add a note about 2018e if someone uses try { in 2015e #58555

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4 changes: 4 additions & 0 deletions src/librustc_resolve/error_reporting.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -251,6 +251,10 @@ impl<'a> Resolver<'a> {
format!("{}!", path_str),
Applicability::MaybeIncorrect,
);
if path_str == "try" && span.rust_2015() {
err.note("if you want the `try` keyword, \
you need to be in the 2018 edition");
}
}
(Def::TyAlias(..), PathSource::Trait(_)) => {
err.span_label(span, "type aliases cannot be used as traits");
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2 changes: 2 additions & 0 deletions src/test/ui/try-block/try-block-in-edition2015.stderr
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Expand Up @@ -16,6 +16,8 @@ error[E0574]: expected struct, variant or union type, found macro `try`
|
LL | let try_result: Option<_> = try {
| ^^^ help: use `!` to invoke the macro: `try!`
|
= note: if you want the `try` keyword, you need to be in the 2018 edition

error: aborting due to 2 previous errors

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