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|
use ra_db::{FileId, SourceDatabase};
use ra_syntax::{
AstNode, ast,
algo::{
find_node_at_offset,
visit::{visitor, Visitor},
},
SyntaxNode,
};
use crate::{
FilePosition, NavigationTarget,
db::RootDatabase,
RangeInfo,
name_ref_kind::{NameRefKind::*, classify_name_ref},
};
pub(crate) fn goto_definition(
db: &RootDatabase,
position: FilePosition,
) -> Option<RangeInfo<Vec<NavigationTarget>>> {
let file = db.parse(position.file_id).tree;
let syntax = file.syntax();
if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
let navs = reference_definition(db, position.file_id, name_ref).to_vec();
return Some(RangeInfo::new(name_ref.syntax().range(), navs.to_vec()));
}
if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
let navs = name_definition(db, position.file_id, name)?;
return Some(RangeInfo::new(name.syntax().range(), navs));
}
None
}
#[derive(Debug)]
pub(crate) enum ReferenceResult {
Exact(NavigationTarget),
Approximate(Vec<NavigationTarget>),
}
impl ReferenceResult {
fn to_vec(self) -> Vec<NavigationTarget> {
use self::ReferenceResult::*;
match self {
Exact(target) => vec![target],
Approximate(vec) => vec,
}
}
}
pub(crate) fn reference_definition(
db: &RootDatabase,
file_id: FileId,
name_ref: &ast::NameRef,
) -> ReferenceResult {
use self::ReferenceResult::*;
let analyzer = hir::SourceAnalyzer::new(db, file_id, name_ref.syntax(), None);
match classify_name_ref(db, &analyzer, name_ref) {
Some(Method(func)) => return Exact(NavigationTarget::from_function(db, func)),
Some(Macro(mac)) => return Exact(NavigationTarget::from_macro_def(db, mac)),
Some(FieldAccess(field)) => return Exact(NavigationTarget::from_field(db, field)),
Some(AssocItem(assoc)) => return Exact(NavigationTarget::from_impl_item(db, assoc)),
Some(Def(def)) => match NavigationTarget::from_def(db, def) {
Some(nav) => return Exact(nav),
None => return Approximate(vec![]),
},
Some(SelfType(ty)) => {
if let Some((def_id, _)) = ty.as_adt() {
return Exact(NavigationTarget::from_adt_def(db, def_id));
}
}
Some(Pat(pat)) => return Exact(NavigationTarget::from_pat(db, file_id, pat)),
Some(SelfParam(par)) => return Exact(NavigationTarget::from_self_param(db, file_id, par)),
Some(GenericParam(_)) => {
// FIXME: go to the generic param def
}
None => {}
};
// Fallback index based approach:
let navs = crate::symbol_index::index_resolve(db, name_ref)
.into_iter()
.map(|s| NavigationTarget::from_symbol(db, s))
.collect();
Approximate(navs)
}
pub(crate) fn name_definition(
db: &RootDatabase,
file_id: FileId,
name: &ast::Name,
) -> Option<Vec<NavigationTarget>> {
let parent = name.syntax().parent()?;
if let Some(module) = ast::Module::cast(&parent) {
if module.has_semi() {
if let Some(child_module) =
hir::source_binder::module_from_declaration(db, file_id, module)
{
let nav = NavigationTarget::from_module(db, child_module);
return Some(vec![nav]);
}
}
}
if let Some(nav) = named_target(file_id, &parent) {
return Some(vec![nav]);
}
None
}
fn named_target(file_id: FileId, node: &SyntaxNode) -> Option<NavigationTarget> {
visitor()
.visit(|node: &ast::StructDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::EnumDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::EnumVariant| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::FnDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::TypeAliasDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::ConstDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::StaticDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::TraitDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::NamedFieldDef| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::Module| NavigationTarget::from_named(file_id, node))
.visit(|node: &ast::MacroCall| NavigationTarget::from_named(file_id, node))
.accept(node)
}
#[cfg(test)]
mod tests {
use test_utils::covers;
use crate::mock_analysis::analysis_and_position;
fn check_goto(fixture: &str, expected: &str) {
let (analysis, pos) = analysis_and_position(fixture);
let mut navs = analysis.goto_definition(pos).unwrap().unwrap().info;
assert_eq!(navs.len(), 1);
let nav = navs.pop().unwrap();
nav.assert_match(expected);
}
#[test]
fn goto_definition_works_in_items() {
check_goto(
"
//- /lib.rs
struct Foo;
enum E { X(Foo<|>) }
",
"Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
);
}
#[test]
fn goto_definition_resolves_correct_name() {
check_goto(
"
//- /lib.rs
use a::Foo;
mod a;
mod b;
enum E { X(Foo<|>) }
//- /a.rs
struct Foo;
//- /b.rs
struct Foo;
",
"Foo STRUCT_DEF FileId(2) [0; 11) [7; 10)",
);
}
#[test]
fn goto_definition_works_for_module_declaration() {
check_goto(
"
//- /lib.rs
mod <|>foo;
//- /foo.rs
// empty
",
"foo SOURCE_FILE FileId(2) [0; 10)",
);
check_goto(
"
//- /lib.rs
mod <|>foo;
//- /foo/mod.rs
// empty
",
"foo SOURCE_FILE FileId(2) [0; 10)",
);
}
#[test]
fn goto_definition_works_for_macros() {
covers!(goto_definition_works_for_macros);
check_goto(
"
//- /lib.rs
macro_rules! foo {
() => {
{}
};
}
fn bar() {
<|>foo!();
}
",
"foo MACRO_CALL FileId(1) [0; 50) [13; 16)",
);
}
#[test]
fn goto_definition_works_for_macros_from_other_crates() {
covers!(goto_definition_works_for_macros);
check_goto(
"
//- /lib.rs
use foo::foo;
fn bar() {
<|>foo!();
}
//- /foo/lib.rs
#[macro_export]
macro_rules! foo {
() => {
{}
};
}
",
"foo MACRO_CALL FileId(2) [0; 79) [29; 32)",
);
}
#[test]
fn goto_definition_works_for_methods() {
covers!(goto_definition_works_for_methods);
check_goto(
"
//- /lib.rs
struct Foo;
impl Foo {
fn frobnicate(&self) { }
}
fn bar(foo: &Foo) {
foo.frobnicate<|>();
}
",
"frobnicate FN_DEF FileId(1) [27; 52) [30; 40)",
);
}
#[test]
fn goto_definition_works_for_fields() {
covers!(goto_definition_works_for_fields);
check_goto(
"
//- /lib.rs
struct Foo {
spam: u32,
}
fn bar(foo: &Foo) {
foo.spam<|>;
}
",
"spam NAMED_FIELD_DEF FileId(1) [17; 26) [17; 21)",
);
}
#[test]
fn goto_definition_works_for_named_fields() {
covers!(goto_definition_works_for_named_fields);
check_goto(
"
//- /lib.rs
struct Foo {
spam: u32,
}
fn bar() -> Foo {
Foo {
spam<|>: 0,
}
}
",
"spam NAMED_FIELD_DEF FileId(1) [17; 26) [17; 21)",
);
}
#[test]
fn goto_definition_on_self() {
check_goto(
"
//- /lib.rs
struct Foo;
impl Foo {
pub fn new() -> Self {
Self<|> {}
}
}
",
"Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
);
check_goto(
"
//- /lib.rs
struct Foo;
impl Foo {
pub fn new() -> Self<|> {
Self {}
}
}
",
"Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
);
check_goto(
"
//- /lib.rs
enum Foo { A }
impl Foo {
pub fn new() -> Self<|> {
Foo::A
}
}
",
"Foo ENUM_DEF FileId(1) [0; 14) [5; 8)",
);
check_goto(
"
//- /lib.rs
enum Foo { A }
impl Foo {
pub fn thing(a: &Self<|>) {
}
}
",
"Foo ENUM_DEF FileId(1) [0; 14) [5; 8)",
);
}
#[test]
fn goto_definition_on_self_in_trait_impl() {
check_goto(
"
//- /lib.rs
struct Foo;
trait Make {
fn new() -> Self;
}
impl Make for Foo {
fn new() -> Self {
Self<|> {}
}
}
",
"Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
);
check_goto(
"
//- /lib.rs
struct Foo;
trait Make {
fn new() -> Self;
}
impl Make for Foo {
fn new() -> Self<|> {
Self{}
}
}
",
"Foo STRUCT_DEF FileId(1) [0; 11) [7; 10)",
);
}
#[test]
fn goto_definition_works_when_used_on_definition_name_itself() {
check_goto(
"
//- /lib.rs
struct Foo<|> { value: u32 }
",
"Foo STRUCT_DEF FileId(1) [0; 25) [7; 10)",
);
check_goto(
r#"
//- /lib.rs
struct Foo {
field<|>: string,
}
"#,
"field NAMED_FIELD_DEF FileId(1) [17; 30) [17; 22)",
);
check_goto(
"
//- /lib.rs
fn foo_test<|>() {
}
",
"foo_test FN_DEF FileId(1) [0; 17) [3; 11)",
);
check_goto(
"
//- /lib.rs
enum Foo<|> {
Variant,
}
",
"Foo ENUM_DEF FileId(1) [0; 25) [5; 8)",
);
check_goto(
"
//- /lib.rs
enum Foo {
Variant1,
Variant2<|>,
Variant3,
}
",
"Variant2 ENUM_VARIANT FileId(1) [29; 37) [29; 37)",
);
check_goto(
r#"
//- /lib.rs
static inner<|>: &str = "";
"#,
"inner STATIC_DEF FileId(1) [0; 24) [7; 12)",
);
check_goto(
r#"
//- /lib.rs
const inner<|>: &str = "";
"#,
"inner CONST_DEF FileId(1) [0; 23) [6; 11)",
);
check_goto(
r#"
//- /lib.rs
type Thing<|> = Option<()>;
"#,
"Thing TYPE_ALIAS_DEF FileId(1) [0; 24) [5; 10)",
);
check_goto(
r#"
//- /lib.rs
trait Foo<|> {
}
"#,
"Foo TRAIT_DEF FileId(1) [0; 13) [6; 9)",
);
check_goto(
r#"
//- /lib.rs
mod bar<|> {
}
"#,
"bar MODULE FileId(1) [0; 11) [4; 7)",
);
}
}
|