libsyntax: improve error message for lifetimes in patterns #29287
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Previously, if you copied a signature from a trait definition such as:
```
fn foo<'a>(&'a Bar) -> bool {}
```
and moved it into an `impl`, there would be an error message:
"unexpected token `'a`"
Adding to the error message that a pattern is expected should help
users to find the actual problem with using a lifetime here.
…tead of unwrapping
|
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bors
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that referenced
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Oct 26, 2015
Previously, if you copied a signature from a trait definition such as:
```rust
fn foo<'a>(&'a Bar) -> bool {}
```
and moved it into an `impl`, there would be an error message:
"unexpected token `'a`"
Adding to the error message that a pattern is expected should help
users to find the actual problem with using a lifetime here.
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Previously, if you copied a signature from a trait definition such as:
and moved it into an
impl, there would be an error message:"unexpected token
'a"Adding to the error message that a pattern is expected should help
users to find the actual problem with using a lifetime here.