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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::{
Adt, FieldSource, HasSource, ImplDef, Local, MacroDef, Module, ModuleDef, Semantics,
StructField, TypeParam,
};
use ra_prof::profile;
use ra_syntax::{
ast::{self, AstNode, VisibilityOwner},
match_ast,
};
use crate::RootDatabase;
#[derive(Debug, PartialEq, Eq)]
pub enum NameDefinition {
Macro(MacroDef),
StructField(StructField),
ModuleDef(ModuleDef),
SelfType(ImplDef),
Local(Local),
TypeParam(TypeParam),
}
impl NameDefinition {
pub fn module(&self, db: &RootDatabase) -> Option<Module> {
match self {
NameDefinition::Macro(it) => it.module(db),
NameDefinition::StructField(it) => Some(it.parent_def(db).module(db)),
NameDefinition::ModuleDef(it) => it.module(db),
NameDefinition::SelfType(it) => Some(it.module(db)),
NameDefinition::Local(it) => Some(it.module(db)),
NameDefinition::TypeParam(it) => Some(it.module(db)),
}
}
pub fn visibility(&self, db: &RootDatabase) -> Option<ast::Visibility> {
match self {
NameDefinition::Macro(_) => None,
NameDefinition::StructField(sf) => match sf.source(db).value {
FieldSource::Named(it) => it.visibility(),
FieldSource::Pos(it) => it.visibility(),
},
NameDefinition::ModuleDef(def) => match def {
ModuleDef::Module(it) => it.declaration_source(db)?.value.visibility(),
ModuleDef::Function(it) => it.source(db).value.visibility(),
ModuleDef::Adt(adt) => match adt {
Adt::Struct(it) => it.source(db).value.visibility(),
Adt::Union(it) => it.source(db).value.visibility(),
Adt::Enum(it) => it.source(db).value.visibility(),
},
ModuleDef::Const(it) => it.source(db).value.visibility(),
ModuleDef::Static(it) => it.source(db).value.visibility(),
ModuleDef::Trait(it) => it.source(db).value.visibility(),
ModuleDef::TypeAlias(it) => it.source(db).value.visibility(),
ModuleDef::EnumVariant(_) => None,
ModuleDef::BuiltinType(_) => None,
},
NameDefinition::SelfType(_) => None,
NameDefinition::Local(_) => None,
NameDefinition::TypeParam(_) => None,
}
}
}
pub enum NameClass {
NameDefinition(NameDefinition),
/// `None` in `if let None = Some(82) {}`
ConstReference(NameDefinition),
}
impl NameClass {
pub fn into_definition(self) -> Option<NameDefinition> {
match self {
NameClass::NameDefinition(it) => Some(it),
NameClass::ConstReference(_) => None,
}
}
pub fn definition(self) -> NameDefinition {
match self {
NameClass::NameDefinition(it) | NameClass::ConstReference(it) => it,
}
}
}
pub fn classify_name(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Option<NameClass> {
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(NameDefinition::ModuleDef(def)));
}
}
classify_name_inner(sema, name).map(NameClass::NameDefinition)
}
fn classify_name_inner(sema: &Semantics<RootDatabase>, name: &ast::Name) -> Option<NameDefinition> {
let _p = profile("classify_name");
let parent = name.syntax().parent()?;
match_ast! {
match parent {
ast::BindPat(it) => {
let local = sema.to_def(&it)?;
Some(NameDefinition::Local(local))
},
ast::RecordFieldDef(it) => {
let field: hir::StructField = sema.to_def(&it)?;
Some(NameDefinition::StructField(field))
},
ast::Module(it) => {
let def = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::StructDef(it) => {
let def: hir::Struct = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::UnionDef(it) => {
let def: hir::Union = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::EnumDef(it) => {
let def: hir::Enum = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::TraitDef(it) => {
let def: hir::Trait = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::StaticDef(it) => {
let def: hir::Static = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::EnumVariant(it) => {
let def: hir::EnumVariant = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::FnDef(it) => {
let def: hir::Function = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::ConstDef(it) => {
let def: hir::Const = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::TypeAliasDef(it) => {
let def: hir::TypeAlias = sema.to_def(&it)?;
Some(NameDefinition::ModuleDef(def.into()))
},
ast::MacroCall(it) => {
let def = sema.to_def(&it)?;
Some(NameDefinition::Macro(def))
},
ast::TypeParam(it) => {
let def = sema.to_def(&it)?;
Some(NameDefinition::TypeParam(def))
},
_ => None,
}
}
}
|
