9375: feat: Highlight exit and yield points r=Veykril a=Veykril

![Code_YBHOCF3DbU](https://user-images.githubusercontent.com/3757771/123128986-e1270a80-d44b-11eb-9854-065459a2dd50.png)
![Code_YyMhqES0LX](https://user-images.githubusercontent.com/3757771/123128988-e1bfa100-d44b-11eb-9c81-6a6031aad740.png)

Fixes #4691
Fixes #9365

Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
This commit is contained in:
bors[bot] 2021-06-24 15:23:25 +00:00 committed by GitHub
commit 264716e827
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 672 additions and 44 deletions

View file

@ -2075,10 +2075,15 @@ impl Type {
pub fn is_unit(&self) -> bool {
matches!(self.ty.kind(&Interner), TyKind::Tuple(0, ..))
}
pub fn is_bool(&self) -> bool {
matches!(self.ty.kind(&Interner), TyKind::Scalar(Scalar::Bool))
}
pub fn is_never(&self) -> bool {
matches!(self.ty.kind(&Interner), TyKind::Never)
}
pub fn is_mutable_reference(&self) -> bool {
matches!(self.ty.kind(&Interner), TyKind::Ref(hir_ty::Mutability::Mut, ..))
}

View file

@ -0,0 +1,586 @@
use hir::Semantics;
use ide_db::{
base_db::FilePosition,
defs::Definition,
helpers::pick_best_token,
search::{FileReference, ReferenceAccess, SearchScope},
RootDatabase,
};
use syntax::{
ast::{self, LoopBodyOwner},
match_ast, AstNode, SyntaxNode, SyntaxToken, TextRange, WalkEvent, T,
};
use crate::{display::TryToNav, references, NavigationTarget};
pub struct HighlightedRange {
pub range: TextRange,
pub access: Option<ReferenceAccess>,
}
// Feature: Highlight Related
//
// Highlights constructs related to the thing under the cursor:
// - if on an identifier, highlights all references to that identifier in the current file
// - if on an `async` or `await token, highlights all yield points for that async context
// - if on a `return` token, `?` character or `->` return type arrow, highlights all exit points for that context
pub(crate) fn highlight_related(
sema: &Semantics<RootDatabase>,
position: FilePosition,
) -> Option<Vec<HighlightedRange>> {
let _p = profile::span("highlight_related");
let syntax = sema.parse(position.file_id).syntax().clone();
let token = pick_best_token(syntax.token_at_offset(position.offset), |kind| match kind {
T![?] => 2, // prefer `?` when the cursor is sandwiched like `await$0?`
T![await] | T![async] | T![return] | T![->] => 1,
_ => 0,
})?;
match token.kind() {
T![return] | T![?] | T![->] => highlight_exit_points(sema, token),
T![await] | T![async] => highlight_yield_points(token),
_ => highlight_references(sema, &syntax, position),
}
}
fn highlight_references(
sema: &Semantics<RootDatabase>,
syntax: &SyntaxNode,
FilePosition { offset, file_id }: FilePosition,
) -> Option<Vec<HighlightedRange>> {
let def = references::find_def(sema, syntax, offset)?;
let usages = def.usages(sema).set_scope(Some(SearchScope::single_file(file_id))).all();
let declaration = match def {
Definition::ModuleDef(hir::ModuleDef::Module(module)) => {
Some(NavigationTarget::from_module_to_decl(sema.db, module))
}
def => def.try_to_nav(sema.db),
}
.filter(|decl| decl.file_id == file_id)
.and_then(|decl| {
let range = decl.focus_range?;
let access = references::decl_access(&def, syntax, range);
Some(HighlightedRange { range, access })
});
let file_refs = usages.references.get(&file_id).map_or(&[][..], Vec::as_slice);
let mut res = Vec::with_capacity(file_refs.len() + 1);
res.extend(declaration);
res.extend(
file_refs
.iter()
.map(|&FileReference { access, range, .. }| HighlightedRange { range, access }),
);
Some(res)
}
fn highlight_exit_points(
sema: &Semantics<RootDatabase>,
token: SyntaxToken,
) -> Option<Vec<HighlightedRange>> {
fn hl(
sema: &Semantics<RootDatabase>,
body: Option<ast::Expr>,
) -> Option<Vec<HighlightedRange>> {
let mut highlights = Vec::new();
let body = body?;
walk(&body, &mut |expr| match expr {
ast::Expr::ReturnExpr(expr) => {
if let Some(token) = expr.return_token() {
highlights.push(HighlightedRange { access: None, range: token.text_range() });
}
}
ast::Expr::TryExpr(try_) => {
if let Some(token) = try_.question_mark_token() {
highlights.push(HighlightedRange { access: None, range: token.text_range() });
}
}
ast::Expr::MethodCallExpr(_) | ast::Expr::CallExpr(_) | ast::Expr::MacroCall(_) => {
if sema.type_of_expr(&expr).map_or(false, |ty| ty.is_never()) {
highlights
.push(HighlightedRange { access: None, range: expr.syntax().text_range() });
}
}
_ => (),
});
let tail = match body {
ast::Expr::BlockExpr(b) => b.tail_expr(),
e => Some(e),
};
if let Some(tail) = tail {
for_each_inner_tail(&tail, &mut |tail| {
highlights
.push(HighlightedRange { access: None, range: tail.syntax().text_range() })
});
}
Some(highlights)
}
for anc in token.ancestors() {
return match_ast! {
match anc {
ast::Fn(fn_) => hl(sema, fn_.body().map(ast::Expr::BlockExpr)),
ast::ClosureExpr(closure) => hl(sema, closure.body()),
ast::EffectExpr(effect) => if matches!(effect.effect(), ast::Effect::Async(_) | ast::Effect::Try(_)| ast::Effect::Const(_)) {
hl(sema, effect.block_expr().map(ast::Expr::BlockExpr))
} else {
continue;
},
_ => continue,
}
};
}
None
}
fn highlight_yield_points(token: SyntaxToken) -> Option<Vec<HighlightedRange>> {
fn hl(
async_token: Option<SyntaxToken>,
body: Option<ast::Expr>,
) -> Option<Vec<HighlightedRange>> {
let mut highlights = Vec::new();
highlights.push(HighlightedRange { access: None, range: async_token?.text_range() });
if let Some(body) = body {
walk(&body, &mut |expr| {
if let ast::Expr::AwaitExpr(expr) = expr {
if let Some(token) = expr.await_token() {
highlights
.push(HighlightedRange { access: None, range: token.text_range() });
}
}
});
}
Some(highlights)
}
for anc in token.ancestors() {
return match_ast! {
match anc {
ast::Fn(fn_) => hl(fn_.async_token(), fn_.body().map(ast::Expr::BlockExpr)),
ast::EffectExpr(effect) => hl(effect.async_token(), effect.block_expr().map(ast::Expr::BlockExpr)),
ast::ClosureExpr(closure) => hl(closure.async_token(), closure.body()),
_ => continue,
}
};
}
None
}
/// Preorder walk all the expression's child expressions
fn walk(expr: &ast::Expr, cb: &mut dyn FnMut(ast::Expr)) {
let mut preorder = expr.syntax().preorder();
while let Some(event) = preorder.next() {
let node = match event {
WalkEvent::Enter(node) => node,
WalkEvent::Leave(_) => continue,
};
match ast::Stmt::cast(node.clone()) {
// recursively walk the initializer, skipping potential const pat expressions
// lets statements aren't usually nested too deeply so this is fine to recurse on
Some(ast::Stmt::LetStmt(l)) => {
if let Some(expr) = l.initializer() {
walk(&expr, cb);
}
preorder.skip_subtree();
}
// Don't skip subtree since we want to process the expression child next
Some(ast::Stmt::ExprStmt(_)) => (),
// skip inner items which might have their own expressions
Some(ast::Stmt::Item(_)) => preorder.skip_subtree(),
None => {
if let Some(expr) = ast::Expr::cast(node) {
let is_different_context = match &expr {
ast::Expr::EffectExpr(effect) => {
matches!(
effect.effect(),
ast::Effect::Async(_) | ast::Effect::Try(_) | ast::Effect::Const(_)
)
}
ast::Expr::ClosureExpr(__) => true,
_ => false,
};
cb(expr);
if is_different_context {
preorder.skip_subtree();
}
} else {
preorder.skip_subtree();
}
}
}
}
}
// FIXME: doesn't account for labeled breaks in labeled blocks
fn for_each_inner_tail(expr: &ast::Expr, cb: &mut dyn FnMut(&ast::Expr)) {
match expr {
ast::Expr::BlockExpr(b) => {
if let Some(e) = b.tail_expr() {
for_each_inner_tail(&e, cb);
}
}
ast::Expr::EffectExpr(e) => match e.effect() {
ast::Effect::Label(_) | ast::Effect::Unsafe(_) => {
if let Some(e) = e.block_expr().and_then(|b| b.tail_expr()) {
for_each_inner_tail(&e, cb);
}
}
ast::Effect::Async(_) | ast::Effect::Try(_) | ast::Effect::Const(_) => cb(expr),
},
ast::Expr::IfExpr(if_) => {
if_.blocks().for_each(|block| for_each_inner_tail(&ast::Expr::BlockExpr(block), cb))
}
ast::Expr::LoopExpr(l) => for_each_break(l, cb),
ast::Expr::MatchExpr(m) => {
if let Some(arms) = m.match_arm_list() {
arms.arms().filter_map(|arm| arm.expr()).for_each(|e| for_each_inner_tail(&e, cb));
}
}
ast::Expr::ArrayExpr(_)
| ast::Expr::AwaitExpr(_)
| ast::Expr::BinExpr(_)
| ast::Expr::BoxExpr(_)
| ast::Expr::BreakExpr(_)
| ast::Expr::CallExpr(_)
| ast::Expr::CastExpr(_)
| ast::Expr::ClosureExpr(_)
| ast::Expr::ContinueExpr(_)
| ast::Expr::FieldExpr(_)
| ast::Expr::ForExpr(_)
| ast::Expr::IndexExpr(_)
| ast::Expr::Literal(_)
| ast::Expr::MacroCall(_)
| ast::Expr::MacroStmts(_)
| ast::Expr::MethodCallExpr(_)
| ast::Expr::ParenExpr(_)
| ast::Expr::PathExpr(_)
| ast::Expr::PrefixExpr(_)
| ast::Expr::RangeExpr(_)
| ast::Expr::RecordExpr(_)
| ast::Expr::RefExpr(_)
| ast::Expr::ReturnExpr(_)
| ast::Expr::TryExpr(_)
| ast::Expr::TupleExpr(_)
| ast::Expr::WhileExpr(_)
| ast::Expr::YieldExpr(_) => cb(expr),
}
}
fn for_each_break(l: &ast::LoopExpr, cb: &mut dyn FnMut(&ast::Expr)) {
let label = l.label().and_then(|lbl| lbl.lifetime());
let mut depth = 0;
if let Some(b) = l.loop_body() {
let preorder = &mut b.syntax().preorder();
let ev_as_expr = |ev| match ev {
WalkEvent::Enter(it) => Some(WalkEvent::Enter(ast::Expr::cast(it)?)),
WalkEvent::Leave(it) => Some(WalkEvent::Leave(ast::Expr::cast(it)?)),
};
let eq_label = |lt: Option<ast::Lifetime>| {
lt.zip(label.as_ref()).map_or(false, |(lt, lbl)| lt.text() == lbl.text())
};
while let Some(node) = preorder.find_map(ev_as_expr) {
match node {
WalkEvent::Enter(expr) => match &expr {
ast::Expr::LoopExpr(_) | ast::Expr::WhileExpr(_) | ast::Expr::ForExpr(_) => {
depth += 1
}
ast::Expr::EffectExpr(e) if e.label().is_some() => depth += 1,
ast::Expr::BreakExpr(b) if depth == 0 || eq_label(b.lifetime()) => {
cb(&expr);
}
_ => (),
},
WalkEvent::Leave(expr) => match expr {
ast::Expr::LoopExpr(_) | ast::Expr::WhileExpr(_) | ast::Expr::ForExpr(_) => {
depth -= 1
}
ast::Expr::EffectExpr(e) if e.label().is_some() => depth -= 1,
_ => (),
},
}
}
}
}
#[cfg(test)]
mod tests {
use crate::fixture;
use super::*;
fn check(ra_fixture: &str) {
let (analysis, pos, annotations) = fixture::annotations(ra_fixture);
let hls = analysis.highlight_related(pos).unwrap().unwrap();
let mut expected = annotations
.into_iter()
.map(|(r, access)| (r.range, (!access.is_empty()).then(|| access)))
.collect::<Vec<_>>();
let mut actual = hls
.into_iter()
.map(|hl| {
(
hl.range,
hl.access.map(|it| {
match it {
ReferenceAccess::Read => "read",
ReferenceAccess::Write => "write",
}
.to_string()
}),
)
})
.collect::<Vec<_>>();
actual.sort_by_key(|(range, _)| range.start());
expected.sort_by_key(|(range, _)| range.start());
assert_eq!(expected, actual);
}
#[test]
fn test_hl_module() {
check(
r#"
//- /lib.rs
mod foo$0;
// ^^^
//- /foo.rs
struct Foo;
"#,
);
}
#[test]
fn test_hl_self_in_crate_root() {
check(
r#"
use self$0;
"#,
);
}
#[test]
fn test_hl_self_in_module() {
check(
r#"
//- /lib.rs
mod foo;
//- /foo.rs
use self$0;
"#,
);
}
#[test]
fn test_hl_local() {
check(
r#"
fn foo() {
let mut bar = 3;
// ^^^ write
bar$0;
// ^^^ read
}
"#,
);
}
#[test]
fn test_hl_yield_points() {
check(
r#"
pub async fn foo() {
// ^^^^^
let x = foo()
.await$0
// ^^^^^
.await;
// ^^^^^
|| { 0.await };
(async { 0.await }).await
// ^^^^^
}
"#,
);
}
#[test]
fn test_hl_yield_points2() {
check(
r#"
pub async$0 fn foo() {
// ^^^^^
let x = foo()
.await
// ^^^^^
.await;
// ^^^^^
|| { 0.await };
(async { 0.await }).await
// ^^^^^
}
"#,
);
}
#[test]
fn test_hl_yield_nested_fn() {
check(
r#"
async fn foo() {
async fn foo2() {
// ^^^^^
async fn foo3() {
0.await
}
0.await$0
// ^^^^^
}
0.await
}
"#,
);
}
#[test]
fn test_hl_yield_nested_async_blocks() {
check(
r#"
async fn foo() {
(async {
// ^^^^^
(async {
0.await
}).await$0 }
// ^^^^^
).await;
}
"#,
);
}
#[test]
fn test_hl_exit_points() {
check(
r#"
fn foo() -> u32 {
if true {
return$0 0;
// ^^^^^^
}
0?;
// ^
0xDEAD_BEEF
// ^^^^^^^^^^^
}
"#,
);
}
#[test]
fn test_hl_exit_points2() {
check(
r#"
fn foo() ->$0 u32 {
if true {
return 0;
// ^^^^^^
}
0?;
// ^
0xDEAD_BEEF
// ^^^^^^^^^^^
}
"#,
);
}
#[test]
fn test_hl_prefer_ref_over_tail_exit() {
check(
r#"
fn foo() -> u32 {
// ^^^
if true {
return 0;
}
0?;
foo$0()
// ^^^
}
"#,
);
}
#[test]
fn test_hl_never_call_is_exit_point() {
check(
r#"
struct Never;
impl Never {
fn never(self) -> ! { loop {} }
}
macro_rules! never {
() => { never() }
}
fn never() -> ! { loop {} }
fn foo() ->$0 u32 {
never();
// ^^^^^^^
never!();
// FIXME sema doesn't give us types for macrocalls
Never.never();
// ^^^^^^^^^^^^^
0
// ^
}
"#,
);
}
#[test]
fn test_hl_inner_tail_exit_points() {
check(
r#"
fn foo() ->$0 u32 {
if true {
unsafe {
return 5;
// ^^^^^^
5
// ^
}
} else {
match 5 {
6 => 100,
// ^^^
7 => loop {
break 5;
// ^^^^^^^
}
8 => 'a: loop {
'b: loop {
break 'a 5;
// ^^^^^^^^^^
break 'b 5;
break 5;
};
}
//
_ => 500,
// ^^^
}
}
}
"#,
);
}
}

View file

@ -24,33 +24,34 @@ mod display;
mod annotations;
mod call_hierarchy;
mod doc_links;
mod highlight_related;
mod expand_macro;
mod extend_selection;
mod file_structure;
mod fn_references;
mod folding_ranges;
mod goto_declaration;
mod goto_definition;
mod goto_implementation;
mod goto_type_definition;
mod view_hir;
mod hover;
mod inlay_hints;
mod join_lines;
mod markdown_remove;
mod matching_brace;
mod move_item;
mod parent_module;
mod references;
mod rename;
mod fn_references;
mod runnables;
mod ssr;
mod status;
mod syntax_highlighting;
mod syntax_tree;
mod typing;
mod markdown_remove;
mod doc_links;
mod view_crate_graph;
mod view_hir;
mod view_item_tree;
use std::sync::Arc;
@ -76,6 +77,7 @@ pub use crate::{
expand_macro::ExpandedMacro,
file_structure::{StructureNode, StructureNodeKind},
folding_ranges::{Fold, FoldKind},
highlight_related::HighlightedRange,
hover::{HoverAction, HoverConfig, HoverDocFormat, HoverGotoTypeData, HoverResult},
inlay_hints::{InlayHint, InlayHintsConfig, InlayKind},
markup::Markup,
@ -492,6 +494,14 @@ impl Analysis {
self.with_db(|db| syntax_highlighting::highlight(db, file_id, None, false))
}
/// Computes all ranges to highlight for a given item in a file.
pub fn highlight_related(
&self,
position: FilePosition,
) -> Cancellable<Option<Vec<HighlightedRange>>> {
self.with_db(|db| highlight_related::highlight_related(&Semantics::new(db), position))
}
/// Computes syntax highlighting for the given file range.
pub fn highlight_range(&self, frange: FileRange) -> Cancellable<Vec<HlRange>> {
self.with_db(|db| {

View file

@ -20,7 +20,7 @@ use rustc_hash::FxHashMap;
use syntax::{
algo::find_node_at_offset,
ast::{self, NameOwner},
match_ast, AstNode, SyntaxNode, TextRange, T,
match_ast, AstNode, SyntaxNode, TextRange, TextSize, T,
};
use crate::{display::TryToNav, FilePosition, NavigationTarget};
@ -60,7 +60,7 @@ pub(crate) fn find_all_refs(
if let Some(name) = get_name_of_item_declaration(&syntax, position) {
(NameClass::classify(sema, &name)?.referenced_or_defined(sema.db), true)
} else {
(find_def(sema, &syntax, position)?, false)
(find_def(sema, &syntax, position.offset)?, false)
};
let mut usages = def.usages(sema).set_scope(search_scope).include_self_refs().all();
@ -90,7 +90,13 @@ pub(crate) fn find_all_refs(
_ => {}
}
}
let declaration = def.try_to_nav(sema.db).map(|nav| {
let declaration = match def {
Definition::ModuleDef(hir::ModuleDef::Module(module)) => {
Some(NavigationTarget::from_module_to_decl(sema.db, module))
}
def => def.try_to_nav(sema.db),
}
.map(|nav| {
let decl_range = nav.focus_or_full_range();
Declaration { nav, access: decl_access(&def, &syntax, decl_range) }
});
@ -104,12 +110,12 @@ pub(crate) fn find_all_refs(
Some(ReferenceSearchResult { declaration, references })
}
fn find_def(
pub(crate) fn find_def(
sema: &Semantics<RootDatabase>,
syntax: &SyntaxNode,
position: FilePosition,
offset: TextSize,
) -> Option<Definition> {
let def = match sema.find_node_at_offset_with_descend(syntax, position.offset)? {
let def = match sema.find_node_at_offset_with_descend(syntax, offset)? {
ast::NameLike::NameRef(name_ref) => {
NameRefClass::classify(sema, &name_ref)?.referenced(sema.db)
}
@ -126,7 +132,11 @@ fn find_def(
Some(def)
}
fn decl_access(def: &Definition, syntax: &SyntaxNode, range: TextRange) -> Option<ReferenceAccess> {
pub(crate) fn decl_access(
def: &Definition,
syntax: &SyntaxNode,
range: TextRange,
) -> Option<ReferenceAccess> {
match def {
Definition::Local(_) | Definition::Field(_) => {}
_ => return None,
@ -658,9 +668,6 @@ fn f() {
);
}
// `mod foo;` is not in the results because `foo` is an `ast::Name`.
// So, there are two references: the first one is a definition of the `foo` module,
// which is the whole `foo.rs`, and the second one is in `use foo::Foo`.
#[test]
fn test_find_all_refs_decl_module() {
check(
@ -680,13 +687,44 @@ pub struct Foo {
}
"#,
expect![[r#"
foo Module FileId(1) 0..35
foo Module FileId(0) 0..8 4..7
FileId(0) 14..17
"#]],
);
}
#[test]
fn test_find_all_refs_decl_module_on_self() {
check(
r#"
//- /lib.rs
mod foo;
//- /foo.rs
use self$0;
"#,
expect![[r#"
foo Module FileId(0) 0..8 4..7
"#]],
);
}
#[test]
fn test_find_all_refs_decl_module_on_self_crate_root() {
check(
r#"
//- /lib.rs
use self$0;
"#,
expect![[r#"
Module FileId(0) 0..10
"#]],
);
}
#[test]
fn test_find_all_refs_super_mod_vis() {
check(
@ -1021,7 +1059,7 @@ impl Foo {
actual += "\n";
}
}
expect.assert_eq(&actual)
expect.assert_eq(actual.trim_start())
}
#[test]

View file

@ -9,8 +9,8 @@ use std::{
use ide::{
AnnotationConfig, AssistKind, AssistResolveStrategy, FileId, FilePosition, FileRange,
HoverAction, HoverGotoTypeData, Query, RangeInfo, Runnable, RunnableKind, SearchScope,
SingleResolve, SourceChange, TextEdit,
HoverAction, HoverGotoTypeData, Query, RangeInfo, Runnable, RunnableKind, SingleResolve,
SourceChange, TextEdit,
};
use ide_db::SymbolKind;
use itertools::Itertools;
@ -18,12 +18,12 @@ use lsp_server::ErrorCode;
use lsp_types::{
CallHierarchyIncomingCall, CallHierarchyIncomingCallsParams, CallHierarchyItem,
CallHierarchyOutgoingCall, CallHierarchyOutgoingCallsParams, CallHierarchyPrepareParams,
CodeLens, CompletionItem, Diagnostic, DiagnosticTag, DocumentFormattingParams,
DocumentHighlight, FoldingRange, FoldingRangeParams, HoverContents, Location, NumberOrString,
Position, PrepareRenameResponse, Range, RenameParams, SemanticTokensDeltaParams,
SemanticTokensFullDeltaResult, SemanticTokensParams, SemanticTokensRangeParams,
SemanticTokensRangeResult, SemanticTokensResult, SymbolInformation, SymbolTag,
TextDocumentIdentifier, TextDocumentPositionParams, Url, WorkspaceEdit,
CodeLens, CompletionItem, Diagnostic, DiagnosticTag, DocumentFormattingParams, FoldingRange,
FoldingRangeParams, HoverContents, Location, NumberOrString, Position, PrepareRenameResponse,
Range, RenameParams, SemanticTokensDeltaParams, SemanticTokensFullDeltaResult,
SemanticTokensParams, SemanticTokensRangeParams, SemanticTokensRangeResult,
SemanticTokensResult, SymbolInformation, SymbolTag, TextDocumentIdentifier,
TextDocumentPositionParams, Url, WorkspaceEdit,
};
use project_model::TargetKind;
use serde::{Deserialize, Serialize};
@ -1178,33 +1178,22 @@ pub(crate) fn handle_code_lens_resolve(
pub(crate) fn handle_document_highlight(
snap: GlobalStateSnapshot,
params: lsp_types::DocumentHighlightParams,
) -> Result<Option<Vec<DocumentHighlight>>> {
) -> Result<Option<Vec<lsp_types::DocumentHighlight>>> {
let _p = profile::span("handle_document_highlight");
let position = from_proto::file_position(&snap, params.text_document_position_params)?;
let line_index = snap.file_line_index(position.file_id)?;
let refs = match snap
.analysis
.find_all_refs(position, Some(SearchScope::single_file(position.file_id)))?
{
let refs = match snap.analysis.highlight_related(position)? {
None => return Ok(None),
Some(refs) => refs,
};
let decl = refs.declaration.filter(|decl| decl.nav.file_id == position.file_id).map(|decl| {
DocumentHighlight {
range: to_proto::range(&line_index, decl.nav.focus_or_full_range()),
kind: decl.access.map(to_proto::document_highlight_kind),
}
});
let file_refs = refs.references.get(&position.file_id).map_or(&[][..], Vec::as_slice);
let mut res = Vec::with_capacity(file_refs.len() + 1);
res.extend(decl);
res.extend(file_refs.iter().map(|&(range, access)| DocumentHighlight {
range: to_proto::range(&line_index, range),
kind: access.map(to_proto::document_highlight_kind),
}));
let res = refs
.into_iter()
.map(|ide::HighlightedRange { range, access }| lsp_types::DocumentHighlight {
range: to_proto::range(&line_index, range),
kind: access.map(to_proto::document_highlight_kind),
})
.collect();
Ok(Some(res))
}