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Auto merge of #15044 - lowr:fix/deduplicate-compl-fields, r=lnicola

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Deduplicate tuple indices for completion

Follow-up to #15026

A tuple struct may dereference to a primitive tuple (though unusual, which is why I previously overlooked this case). We should not show the same tuple index in completion in such cases.

Deduplication of indices among multiple tuple structs is already handled in the previous PR.
This commit is contained in:
bors 2023-06-13 09:20:41 +00:00
commit 25f1c728b4
1 changed files with 28 additions and 2 deletions
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30
crates/ide-completion/src/completions/dot.rs
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@ -113,8 +113,12 @@ fn complete_fields(
}
}
for (i, ty) in receiver.tuple_fields(ctx.db).into_iter().enumerate() {
// Tuple fields are always public (tuple struct fields are handled above).
tuple_index(acc, i, ty);
// Tuples are always the last type in a deref chain, so just check if the name is
// already seen without inserting into the hashset.
if !seen_names.contains(&hir::Name::new_tuple_field(i)) {
// Tuple fields are always public (tuple struct fields are handled above).
tuple_index(acc, i, ty);
}
}
}
}
@ -720,6 +724,28 @@ fn test(a: A) {
);
}
#[test]
fn test_tuple_struct_deref_to_tuple_no_same_index() {
check(
r#"
//- minicore: deref
struct A(u8);
impl core::ops::Deref for A {
type Target = (u16, u32);
fn deref(&self) -> &Self::Target { loop {} }
}
fn test(a: A) {
a.$0
}
"#,
expect![[r#"
fd 0 u8
fd 1 u32
me deref() (use core::ops::Deref) fn(&self) -> &<Self as Deref>::Target
"#]],
);
}
#[test]
fn test_completion_works_in_consts() {
check(