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fix: Fix completions not considering ancestor items for attribute search

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This commit is contained in:
Lukas Wirth 2022-01-05 21:12:36 +01:00
parent 68bc12c3b8
commit bd91327079
1 changed files with 40 additions and 27 deletions
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67
crates/ide_completion/src/context.rs
View File

@ -1,5 +1,7 @@
//! See `CompletionContext` structure.
use std::iter;
use base_db::SourceDatabaseExt;
use hir::{Local, Name, ScopeDef, Semantics, SemanticsScope, Type, TypeInfo};
use ide_db::{
@ -431,12 +433,17 @@ fn expand_and_fill(
mut fake_ident_token: SyntaxToken,
) {
let _p = profile::span("CompletionContext::expand_and_fill");
loop {
// Expand attributes
if let (Some(actual_item), Some(item_with_fake_ident)) = (
find_node_at_offset::<ast::Item>(&original_file, offset),
find_node_at_offset::<ast::Item>(&speculative_file, offset),
) {
'expansion: loop {
let parent_item =
|item: &ast::Item| item.syntax().ancestors().skip(1).find_map(ast::Item::cast);
let ancestor_items = iter::successors(
Option::zip(
find_node_at_offset::<ast::Item>(&original_file, offset),
find_node_at_offset::<ast::Item>(&speculative_file, offset),
),
|(a, b)| parent_item(a).zip(parent_item(b)),
);
for (actual_item, item_with_fake_ident) in ancestor_items {
match (
self.sema.expand_attr_macro(&actual_item),
self.sema.speculative_expand_attr_macro(
@ -445,19 +452,22 @@ fn expand_and_fill(
fake_ident_token.clone(),
),
) {
(Some(actual_expansion), Some(speculative_expansion)) => {
let new_offset = speculative_expansion.1.text_range().start();
// maybe parent items have attributes
(None, None) => (),
// successful expansions
(Some(actual_expansion), Some((fake_expansion, fake_mapped_token))) => {
let new_offset = fake_mapped_token.text_range().start();
if new_offset > actual_expansion.text_range().end() {
break;
break 'expansion;
}
original_file = actual_expansion;
speculative_file = speculative_expansion.0;
fake_ident_token = speculative_expansion.1;
speculative_file = fake_expansion;
fake_ident_token = fake_mapped_token;
offset = new_offset;
continue;
continue 'expansion;
}
(None, None) => (),
_ => break,
// exactly one expansion failed, inconsistent state so stop expanding completely
_ => break 'expansion,
}
}
@ -477,28 +487,31 @@ fn expand_and_fill(
None => break,
};
if let (Some(actual_expansion), Some(speculative_expansion)) = (
match (
self.sema.expand(&actual_macro_call),
self.sema.speculative_expand(
&actual_macro_call,
&speculative_args,
fake_ident_token,
fake_ident_token.clone(),
),
) {
let new_offset = speculative_expansion.1.text_range().start();
if new_offset > actual_expansion.text_range().end() {
break;
// successful expansions
(Some(actual_expansion), Some((fake_expansion, fake_mapped_token))) => {
let new_offset = fake_mapped_token.text_range().start();
if new_offset > actual_expansion.text_range().end() {
break;
}
original_file = actual_expansion;
speculative_file = fake_expansion;
fake_ident_token = fake_mapped_token;
offset = new_offset;
continue;
}
original_file = actual_expansion;
speculative_file = speculative_expansion.0;
fake_ident_token = speculative_expansion.1;
offset = new_offset;
} else {
break;
_ => break,
}
} else {
break;
}
break;
}
self.fill(&original_file, speculative_file, offset);