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impl Trait doesn't understand that empty functions return () #36379
Description
The following should compile because (): Default:
#![feature(conservative_impl_trait)]
fn test() -> impl Default {}However, it fails with:
error[E0282]: unable to infer enough type information about `_`
--> tmp.rs:2:14
|
2 | fn test() -> impl Default {}
| ^^^^^^^^^^^^ cannot infer type for `_`
|
= note: type annotations or generic parameter binding required(Obviously, nobody will ever run into this in practice...)
Activity
Mark-Simulacrum commentedon May 18, 2017
This works today; E-needstest.
venkatagiri commentedon May 25, 2017
@Mark-Simulacrum would a
run-passbe fine for this?Mark-Simulacrum commentedon May 25, 2017
Let's go with a compile-fail test that look something like this one; meaningful part being these two lines. Let me know if you have any more questions!
regression test for rust-lang#36379
Rollup merge of rust-lang#42230 - venkatagiri:ice_regression_tests, r…
Rollup merge of rust-lang#42230 - venkatagiri:ice_regression_tests, r…
Rollup merge of rust-lang#42230 - venkatagiri:ice_regression_tests, r…