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//! `NameDefinition` keeps information about the element we want to search references for.
//! The element is represented by `NameKind`. It's located inside some `container` and
//! has a `visibility`, which defines a search scope.
//! Note that the reference search is possible for not all of the classified items.
// FIXME: this badly needs rename/rewrite (matklad, 2020-02-06).
use hir::{
Field, HasVisibility, ImplDef, Local, MacroDef, Module, ModuleDef, Name, PathResolution,
Semantics, TypeParam, Visibility,
};
use ra_prof::profile;
use ra_syntax::{
ast::{self, AstNode, NameOwner},
match_ast,
};
use test_utils::tested_by;
use crate::RootDatabase;
// FIXME: a more precise name would probably be `Symbol`?
#[derive(Debug, PartialEq, Eq)]
pub enum Definition {
Macro(MacroDef),
Field(Field),
ModuleDef(ModuleDef),
SelfType(ImplDef),
Local(Local),
TypeParam(TypeParam),
}
impl Definition {
pub fn module(&self, db: &RootDatabase) -> Option<Module> {
match self {
Definition::Macro(it) => it.module(db),
Definition::Field(it) => Some(it.parent_def(db).module(db)),
Definition::ModuleDef(it) => it.module(db),
Definition::SelfType(it) => Some(it.module(db)),
Definition::Local(it) => Some(it.module(db)),
Definition::TypeParam(it) => Some(it.module(db)),
}
}
pub fn visibility(&self, db: &RootDatabase) -> Option<Visibility> {
let module = self.module(db);
match self {
Definition::Macro(_) => None,
Definition::Field(sf) => Some(sf.visibility(db)),
Definition::ModuleDef(def) => module?.visibility_of(db, def),
Definition::SelfType(_) => None,
Definition::Local(_) => None,
Definition::TypeParam(_) => None,
}
}
pub fn name(&self, db: &RootDatabase) -> Option<Name> {
let name = match self {
Definition::Macro(it) => it.name(db)?,
Definition::Field(it) => it.name(db),
Definition::ModuleDef(def) => match def {
hir::ModuleDef::Module(it) => it.name(db)?,
hir::ModuleDef::Function(it) => it.name(db),
hir::ModuleDef::Adt(def) => match def {
hir::Adt::Struct(it) => it.name(db),
hir::Adt::Union(it) => it.name(db),
hir::Adt::Enum(it) => it.name(db),
},
hir::ModuleDef::EnumVariant(it) => it.name(db),
hir::ModuleDef::Const(it) => it.name(db)?,
hir::ModuleDef::Static(it) => it.name(db)?,
hir::ModuleDef::Trait(it) => it.name(db),
hir::ModuleDef::TypeAlias(it) => it.name(db),
hir::ModuleDef::BuiltinType(_) => return None,
},
Definition::SelfType(_) => return None,
Definition::Local(it) => it.name(db)?,
Definition::TypeParam(it) => it.name(db),
};
Some(name)
}
}
pub enum NameClass {
Definition(Definition),
/// `None` in `if let None = Some(82) {}`
ConstReference(Definition),
}
impl NameClass {
pub fn into_definition(self) -> Option<Definition> {
match self {
NameClass::Definition(it) => Some(it),
NameClass::ConstReference(_) => None,
}
}
pub fn definition(self) -> Definition {
match self {
NameClass::Definition(it) | NameClass::ConstReference(it) => it,
}
}
}
pub fn classify_name(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Option<NameClass> {
let _p = profile("classify_name");
if let Some(bind_pat) = name.syntax().parent().and_then(ast::BindPat::cast) {
if let Some(def) = sema.resolve_bind_pat_to_const(&bind_pat) {
return Some(NameClass::ConstReference(Definition::ModuleDef(def)));
}
}
classify_name_inner(sema, name).map(NameClass::Definition)
}
fn classify_name_inner(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Option<Definition> {
println!("name : {} -- {:?}", name, name);
let parent = name.syntax().parent()?;
println!("parent : {} -- {:?}", parent, parent);
match_ast! {
match parent {
ast::Alias(it) => {
let def = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::BindPat(it) => {
let local = sema.to_def(&it)?;
Some(Definition::Local(local))
},
ast::RecordFieldDef(it) => {
let field: hir::Field = sema.to_def(&it)?;
Some(Definition::Field(field))
},
ast::Module(it) => {
let def = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::StructDef(it) => {
let def: hir::Struct = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::UnionDef(it) => {
let def: hir::Union = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::EnumDef(it) => {
let def: hir::Enum = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::TraitDef(it) => {
let def: hir::Trait = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::StaticDef(it) => {
let def: hir::Static = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::EnumVariant(it) => {
let def: hir::EnumVariant = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::FnDef(it) => {
let def: hir::Function = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::ConstDef(it) => {
let def: hir::Const = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::TypeAliasDef(it) => {
let def: hir::TypeAlias = sema.to_def(&it)?;
Some(Definition::ModuleDef(def.into()))
},
ast::MacroCall(it) => {
let def = sema.to_def(&it)?;
Some(Definition::Macro(def))
},
ast::TypeParam(it) => {
let def = sema.to_def(&it)?;
Some(Definition::TypeParam(def))
},
_ => None,
}
}
}
#[derive(Debug)]
pub enum NameRefClass {
Definition(Definition),
FieldShorthand { local: Local, field: Definition },
}
impl NameRefClass {
pub fn definition(self) -> Definition {
match self {
NameRefClass::Definition(def) => def,
NameRefClass::FieldShorthand { local, field: _ } => Definition::Local(local),
}
}
}
pub fn classify_name_ref(
sema: &Semantics<RootDatabase>,
name_ref: &ast::NameRef,
) -> Option<NameRefClass> {
let _p = profile("classify_name_ref");
let parent = name_ref.syntax().parent()?;
if let Some(method_call) = ast::MethodCallExpr::cast(parent.clone()) {
tested_by!(goto_def_for_methods; force);
if let Some(func) = sema.resolve_method_call(&method_call) {
return Some(NameRefClass::Definition(Definition::ModuleDef(func.into())));
}
}
if let Some(field_expr) = ast::FieldExpr::cast(parent.clone()) {
tested_by!(goto_def_for_fields; force);
if let Some(field) = sema.resolve_field(&field_expr) {
return Some(NameRefClass::Definition(Definition::Field(field)));
}
}
if let Some(record_field) = ast::RecordField::for_field_name(name_ref) {
tested_by!(goto_def_for_record_fields; force);
tested_by!(goto_def_for_field_init_shorthand; force);
if let Some((field, local)) = sema.resolve_record_field(&record_field) {
let field = Definition::Field(field);
let res = match local {
None => NameRefClass::Definition(field),
Some(local) => NameRefClass::FieldShorthand { field, local },
};
return Some(res);
}
}
if let Some(record_field_pat) = ast::RecordFieldPat::cast(parent.clone()) {
tested_by!(goto_def_for_record_field_pats; force);
if let Some(field) = sema.resolve_record_field_pat(&record_field_pat) {
let field = Definition::Field(field);
return Some(NameRefClass::Definition(field));
}
}
if let Some(macro_call) = parent.ancestors().find_map(ast::MacroCall::cast) {
tested_by!(goto_def_for_macros; force);
if let Some(macro_def) = sema.resolve_macro_call(¯o_call) {
return Some(NameRefClass::Definition(Definition::Macro(macro_def)));
}
}
let path = name_ref.syntax().ancestors().find_map(ast::Path::cast)?;
let resolved = sema.resolve_path(&path)?;
let res = match resolved {
PathResolution::Def(def) => Definition::ModuleDef(def),
PathResolution::AssocItem(item) => {
let def = match item {
hir::AssocItem::Function(it) => it.into(),
hir::AssocItem::Const(it) => it.into(),
hir::AssocItem::TypeAlias(it) => it.into(),
};
Definition::ModuleDef(def)
}
PathResolution::Local(local) => Definition::Local(local),
PathResolution::TypeParam(par) => Definition::TypeParam(par),
PathResolution::Macro(def) => Definition::Macro(def),
PathResolution::SelfType(impl_def) => Definition::SelfType(impl_def),
};
Some(NameRefClass::Definition(res))
}
|