Skip to content

[WIP] Experiment: stabilize never type #79470

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 18 commits into from
Closed

[WIP] Experiment: stabilize never type #79470

Show file tree
Hide file tree
Changes from 17 commits
Commits
Show all changes
18 commits
Select commit Hold shift + click to select a range
1cbde85
factor fallback code into its own module
nikomatsakis Nov 19, 2020
0005746
convert to a method on FnCtxt
nikomatsakis Nov 19, 2020
d8a881b
introduce a `Diverging` enum instead of a bool
nikomatsakis Nov 20, 2020
00786cf
shallow resolve target type in coercion
nikomatsakis Nov 20, 2020
b3f8d74
cleanup: extract a helper for coercion from inference variables
nikomatsakis Nov 21, 2020
448eb37
introduce a Coerce predicate
nikomatsakis Nov 21, 2020
b37daab
move the `sub-unify` check and extend the documentation a bit
nikomatsakis Nov 21, 2020
a4f357d
create `Coercion` obligations given 2 unbound type variables
nikomatsakis Nov 21, 2020
de3bf35
make `TyVid` implement the `Idx` trait
nikomatsakis Nov 21, 2020
73b743b
move `fallback_if_possible` and friends to fallback.rs
nikomatsakis Nov 22, 2020
694d3c8
introduce new fallback algorithm
nikomatsakis Nov 22, 2020
8eda90e
remove diverging type variables from fn check
nikomatsakis Nov 23, 2020
fceb523
remove reliance on "diverging" type variables
nikomatsakis Nov 23, 2020
fc02f0f
stop categorizing inference variables as diverging when created
nikomatsakis Nov 23, 2020
128de40
fix bug in `DepthFirstSearch` where start node was not visited
nikomatsakis Nov 23, 2020
4157667
optimization: use a single DepthFirstSearch instead of hashsets
nikomatsakis Nov 23, 2020
5ef3eb6
stabilize feature(never_type)
nikomatsakis Nov 27, 2020
3ad1e4d
WIP: make Infallible an alias for !
nikomatsakis Nov 29, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 0 additions & 3 deletions compiler/rustc_ast_passes/src/feature_gate.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -424,9 +424,6 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
ast::TyKind::BareFn(ref bare_fn_ty) => {
self.check_extern(bare_fn_ty.ext);
}
ast::TyKind::Never => {
gate_feature_post!(&self, never_type, ty.span, "the `!` type is experimental");
}
_ => {}
}
visit::walk_ty(self, ty)
Expand Down
Loading