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Also replace the associated types with iter

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This commit is contained in:
Kirill Bulatov 2020-10-10 21:37:20 +03:00
parent 9a72b7bccd
commit 2bb80a4f03
2 changed files with 19 additions and 12 deletions
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6
crates/hir/src/code_model.rs
View File

@ -1372,7 +1372,7 @@ impl Type {
r#trait: Trait,
args: &[Type],
alias: TypeAlias,
) -> Option<Ty> {
) -> Option<Type> {
let subst = Substs::build_for_def(db, r#trait.id)
.push(self.ty.value.clone())
.fill(args.iter().map(|t| t.ty.value.clone()))
@ -1393,6 +1393,10 @@ impl Type {
Solution::Unique(SolutionVariables(subst)) => subst.value.first().cloned(),
Solution::Ambig(_) => None,
}
.map(|ty| Type {
krate: self.krate,
ty: InEnvironment { value: ty, environment: Arc::clone(&self.ty.environment) },
})
}
pub fn is_copy(&self, db: &dyn HirDatabase) -> bool {

25
crates/ide/src/inlay_hints.rs
View File

@ -228,17 +228,20 @@ fn hint_iterator(
_ => None,
})?;
if let Some(ty) = ty.normalize_trait_assoc_type(db, iter_trait, &[], assoc_type_item) {
// TODO kb also check for the iterator impls for this ty
dbg!(ty.display(db).to_string());
const LABEL_START: &str = "impl Iterator<Item = ";
const LABEL_END: &str = ">";
let ty_display = ty.display_truncated(
db,
config
.max_length
.map(|len| len.saturating_sub(LABEL_START.len() + LABEL_END.len())),
);
let ty_display = hint_iterator(sema, config, &ty)
.map(|assoc_type_impl| assoc_type_impl.to_string())
.unwrap_or_else(|| {
ty.display_truncated(
db,
config
.max_length
.map(|len| len.saturating_sub(LABEL_START.len() + LABEL_END.len())),
)
.to_string()
});
return Some(format!("{}{}{}", LABEL_START, ty_display, LABEL_END).into());
}
}
@ -1169,7 +1172,7 @@ fn main() {
InlayHintsConfig {
parameter_hints: false,
type_hints: true,
chaining_hints: true,
chaining_hints: false,
max_length: None,
},
r#"
@ -1193,8 +1196,8 @@ fn main() {
let mut some_iter = SomeIter::new();
//^^^^^^^^^^^^^ SomeIter<Take<Repeat<i32>>>
some_iter.push(iter::repeat(2).take(2));
let zz = some_iter.take(2);
//^^ impl Iterator<Item = Take<Repeat<i32>>>
let iter_of_iters = some_iter.take(2);
//^^^^^^^^^^^^^ impl Iterator<Item = impl Iterator<Item = i32>>
}
"#,
);