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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, AssocItem, HasSource, ImplBlock, InFile, Local, MacroDef, Module, ModuleDef, SourceBinder,
StructField, TypeParam, VariantDef,
};
use ra_prof::profile;
use ra_syntax::{
ast::{self, AstNode, VisibilityOwner},
match_ast,
};
use crate::RootDatabase;
#[derive(Debug, PartialEq, Eq)]
pub enum NameKind {
Macro(MacroDef),
Field(StructField),
AssocItem(AssocItem),
Def(ModuleDef),
SelfType(ImplBlock),
Local(Local),
TypeParam(TypeParam),
}
#[derive(PartialEq, Eq)]
pub struct NameDefinition {
pub visibility: Option<ast::Visibility>,
/// FIXME: this doesn't really make sense. For example, builtin types don't
/// really have a module.
pub container: Module,
pub kind: NameKind,
}
pub fn classify_name(
sb: &mut SourceBinder<RootDatabase>,
name: InFile<&ast::Name>,
) -> Option<NameDefinition> {
let _p = profile("classify_name");
let parent = name.value.syntax().parent()?;
match_ast! {
match parent {
ast::BindPat(it) => {
let src = name.with_value(it);
let local = sb.to_def(src)?;
Some(NameDefinition {
visibility: None,
container: local.module(sb.db),
kind: NameKind::Local(local),
})
},
ast::RecordFieldDef(it) => {
let src = name.with_value(it);
let field: hir::StructField = sb.to_def(src)?;
Some(from_struct_field(sb.db, field))
},
ast::Module(it) => {
let def = sb.to_def(name.with_value(it))?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::StructDef(it) => {
let src = name.with_value(it);
let def: hir::Struct = sb.to_def(src)?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::EnumDef(it) => {
let src = name.with_value(it);
let def: hir::Enum = sb.to_def(src)?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::TraitDef(it) => {
let src = name.with_value(it);
let def: hir::Trait = sb.to_def(src)?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::StaticDef(it) => {
let src = name.with_value(it);
let def: hir::Static = sb.to_def(src)?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::EnumVariant(it) => {
let src = name.with_value(it);
let def: hir::EnumVariant = sb.to_def(src)?;
Some(from_module_def(sb.db, def.into(), None))
},
ast::FnDef(it) => {
let src = name.with_value(it);
let def: hir::Function = sb.to_def(src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(sb.db, def.into()))
} else {
Some(from_module_def(sb.db, def.into(), None))
}
},
ast::ConstDef(it) => {
let src = name.with_value(it);
let def: hir::Const = sb.to_def(src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(sb.db, def.into()))
} else {
Some(from_module_def(sb.db, def.into(), None))
}
},
ast::TypeAliasDef(it) => {
let src = name.with_value(it);
let def: hir::TypeAlias = sb.to_def(src)?;
if parent.parent().and_then(ast::ItemList::cast).is_some() {
Some(from_assoc_item(sb.db, def.into()))
} else {
Some(from_module_def(sb.db, def.into(), None))
}
},
ast::MacroCall(it) => {
let src = name.with_value(it);
let def = sb.to_def(src.clone())?;
let module = sb.to_module_def(src.file_id.original_file(sb.db))?;
Some(NameDefinition {
visibility: None,
container: module,
kind: NameKind::Macro(def),
})
},
ast::TypeParam(it) => {
let src = name.with_value(it);
let def = sb.to_def(src)?;
Some(NameDefinition {
visibility: None,
container: def.module(sb.db),
kind: NameKind::TypeParam(def),
})
},
_ => None,
}
}
}
pub fn from_assoc_item(db: &RootDatabase, item: AssocItem) -> NameDefinition {
let container = item.module(db);
let visibility = match item {
AssocItem::Function(f) => f.source(db).value.visibility(),
AssocItem::Const(c) => c.source(db).value.visibility(),
AssocItem::TypeAlias(a) => a.source(db).value.visibility(),
};
let kind = NameKind::AssocItem(item);
NameDefinition { kind, container, visibility }
}
pub fn from_struct_field(db: &RootDatabase, field: StructField) -> NameDefinition {
let kind = NameKind::Field(field);
let parent = field.parent_def(db);
let container = parent.module(db);
let visibility = match parent {
VariantDef::Struct(s) => s.source(db).value.visibility(),
VariantDef::Union(e) => e.source(db).value.visibility(),
VariantDef::EnumVariant(e) => e.source(db).value.parent_enum().visibility(),
};
NameDefinition { kind, container, visibility }
}
pub fn from_module_def(
db: &RootDatabase,
def: ModuleDef,
module: Option<Module>,
) -> NameDefinition {
let kind = NameKind::Def(def);
let (container, visibility) = match def {
ModuleDef::Module(it) => {
let container = it.parent(db).or_else(|| Some(it)).unwrap();
let visibility = it.declaration_source(db).and_then(|s| s.value.visibility());
(container, visibility)
}
ModuleDef::EnumVariant(it) => {
let container = it.module(db);
let visibility = it.source(db).value.parent_enum().visibility();
(container, visibility)
}
ModuleDef::Function(it) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Const(it) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Static(it) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Trait(it) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::TypeAlias(it) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Adt(Adt::Struct(it)) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Adt(Adt::Union(it)) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::Adt(Adt::Enum(it)) => (it.module(db), it.source(db).value.visibility()),
ModuleDef::BuiltinType(..) => (module.unwrap(), None),
};
NameDefinition { kind, container, visibility }
}
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