Unnamed repository; edit this file 'description' to name the repository.
Fix another bug with completion of trait items inside macros
This time, when completing the keyword (e.g. `fn` + whitespace).
The bug was actually a double-bug:
First, we did not resolve the impl in the macro-expanded file but in the real file, which of course cannot work.
Second, in analysis the whitespace was correlated with the `impl` and not the incomplete `fn`, which caused fake (where we insert an identifier after the whitespace) and real expansions to go out of sync, which failed analysis. The fix is to skip whitespaces in analysis.
| -rw-r--r-- | crates/ide-completion/src/completions/item_list/trait_impl.rs | 32 | ||||
| -rw-r--r-- | crates/ide-completion/src/context/analysis.rs | 15 |
2 files changed, 36 insertions, 11 deletions
diff --git a/crates/ide-completion/src/completions/item_list/trait_impl.rs b/crates/ide-completion/src/completions/item_list/trait_impl.rs index 246b125266..18629529b7 100644 --- a/crates/ide-completion/src/completions/item_list/trait_impl.rs +++ b/crates/ide-completion/src/completions/item_list/trait_impl.rs @@ -85,7 +85,7 @@ fn complete_trait_impl_name( name: &Option<ast::Name>, kind: ImplCompletionKind, ) -> Option<()> { - let item = match name { + let macro_file_item = match name { Some(name) => name.syntax().parent(), None => { let token = &ctx.token; @@ -96,12 +96,12 @@ fn complete_trait_impl_name( .parent() } }?; - let item = ctx.sema.original_syntax_node_rooted(&item)?; + let real_file_item = ctx.sema.original_syntax_node_rooted(¯o_file_item)?; // item -> ASSOC_ITEM_LIST -> IMPL - let impl_def = ast::Impl::cast(item.parent()?.parent()?)?; + let impl_def = ast::Impl::cast(macro_file_item.parent()?.parent()?)?; let replacement_range = { // ctx.sema.original_ast_node(item)?; - let first_child = item + let first_child = real_file_item .children_with_tokens() .find(|child| { !matches!( @@ -109,7 +109,7 @@ fn complete_trait_impl_name( SyntaxKind::COMMENT | SyntaxKind::WHITESPACE | SyntaxKind::ATTR ) }) - .unwrap_or_else(|| SyntaxElement::Node(item.clone())); + .unwrap_or_else(|| SyntaxElement::Node(real_file_item.clone())); TextRange::new(first_child.text_range().start(), ctx.source_range().end()) }; @@ -1658,7 +1658,7 @@ trait Trait { impl Trait for () { f$0 } - "#, + "#, expect![[r#" me fn bar(..) me fn baz(..) @@ -1668,5 +1668,25 @@ impl Trait for () { kw self:: "#]], ); + check( + r#" +//- proc_macros: identity +trait Trait { + fn foo(&self) {} + fn bar(&self) {} + fn baz(&self) {} +} + +#[proc_macros::identity] +impl Trait for () { + fn $0 +} + "#, + expect![[r#" + me fn bar(..) + me fn baz(..) + me fn foo(..) + "#]], + ); } } diff --git a/crates/ide-completion/src/context/analysis.rs b/crates/ide-completion/src/context/analysis.rs index 3c4d489c0f..562f60dbe2 100644 --- a/crates/ide-completion/src/context/analysis.rs +++ b/crates/ide-completion/src/context/analysis.rs @@ -5,7 +5,7 @@ use hir::{ExpandResult, Semantics, Type, TypeInfo, Variant}; use ide_db::{active_parameter::ActiveParameter, RootDatabase}; use itertools::Either; use syntax::{ - algo::{ancestors_at_offset, find_node_at_offset, non_trivia_sibling}, + algo::{self, ancestors_at_offset, find_node_at_offset, non_trivia_sibling}, ast::{ self, AttrKind, HasArgList, HasGenericArgs, HasGenericParams, HasLoopBody, HasName, NameOrNameRef, @@ -85,6 +85,11 @@ pub(super) fn expand_and_analyze( }) } +fn token_at_offset_ignore_whitespace(file: &SyntaxNode, offset: TextSize) -> Option<SyntaxToken> { + let token = file.token_at_offset(offset).left_biased()?; + algo::skip_whitespace_token(token, Direction::Prev) +} + /// Expand attributes and macro calls at the current cursor position for both the original file /// and fake file repeatedly. As soon as one of the two expansions fail we stop so the original /// and speculative states stay in sync. @@ -125,9 +130,7 @@ fn expand( // Left biased since there may already be an identifier token there, and we appended to it. if !sema.might_be_inside_macro_call(&fake_ident_token) - && original_file - .token_at_offset(original_offset + relative_offset) - .left_biased() + && token_at_offset_ignore_whitespace(&original_file, original_offset + relative_offset) .is_some_and(|original_token| !sema.might_be_inside_macro_call(&original_token)) { // Recursion base case. @@ -143,9 +146,11 @@ fn expand( let parent_item = |item: &ast::Item| item.syntax().ancestors().skip(1).find_map(ast::Item::cast); + let original_node = token_at_offset_ignore_whitespace(&original_file, original_offset) + .and_then(|token| token.parent_ancestors().find_map(ast::Item::cast)); let ancestor_items = iter::successors( Option::zip( - find_node_at_offset::<ast::Item>(&original_file, original_offset), + original_node, find_node_at_offset::<ast::Item>( &speculative_file, fake_ident_token.text_range().start(), |