This repository was archived by the owner on Apr 8, 2024. It is now read-only.
This repository was archived by the owner on Apr 8, 2024. It is now read-only.
Edition differences #41
Description
I think it would be good if the grammar tracked edition differences. I'm not sure how this should be done on a technical level (maybe some preprocessing step?), this issue is mainly to record the differences until it is decided how to encode them.
Trait functions cannot have anonymous parameters in 2018
trait T {
fn f(u8);
}dyn weak keyword support
In 2015, dyn is a weak keyword. It is context sensitive, so there are a variety of differences.
// Type expressions allowed in 2015, not 2018.
dyn +
// Type expressions allowed in both.
dyn // I don't know why this is allowed in 2018.
// Interpreted differently.
dyn ::fooNew reserved keywords
The following keywords were added to 2018
asyncawaittry
async fn not allowed in 2015
The following fails to parse in 2015:
async fn f() {}