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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, ImplBlock, InFile, Local, MacroDef, Module, ModuleDef,
SourceBinder, StructField, TypeParam,
};
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),
StructField(StructField),
ModuleDef(ModuleDef),
SelfType(ImplBlock),
Local(Local),
TypeParam(TypeParam),
}
#[derive(PartialEq, Eq)]
pub struct NameDefinition {
/// FIXME: this doesn't really make sense. For example, builtin types don't
/// really have a module.
pub kind: NameKind,
}
impl NameDefinition {
pub fn module(&self, db: &RootDatabase) -> Option<Module> {
match self.kind {
NameKind::Macro(it) => it.module(db),
NameKind::StructField(it) => Some(it.parent_def(db).module(db)),
NameKind::ModuleDef(it) => it.module(db),
NameKind::SelfType(it) => Some(it.module(db)),
NameKind::Local(it) => Some(it.module(db)),
NameKind::TypeParam(it) => Some(it.module(db)),
}
}
pub fn visibility(&self, db: &RootDatabase) -> Option<ast::Visibility> {
match self.kind {
NameKind::Macro(_) => None,
NameKind::StructField(sf) => match sf.source(db).value {
FieldSource::Named(it) => it.visibility(),
FieldSource::Pos(it) => it.visibility(),
},
NameKind::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,
},
NameKind::SelfType(_) => None,
NameKind::Local(_) => None,
NameKind::TypeParam(_) => None,
}
}
}
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 {
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(field))
},
ast::Module(it) => {
let def = sb.to_def(name.with_value(it))?;
Some(from_module_def(def.into()))
},
ast::StructDef(it) => {
let src = name.with_value(it);
let def: hir::Struct = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::EnumDef(it) => {
let src = name.with_value(it);
let def: hir::Enum = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::TraitDef(it) => {
let src = name.with_value(it);
let def: hir::Trait = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::StaticDef(it) => {
let src = name.with_value(it);
let def: hir::Static = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::EnumVariant(it) => {
let src = name.with_value(it);
let def: hir::EnumVariant = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::FnDef(it) => {
let src = name.with_value(it);
let def: hir::Function = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::ConstDef(it) => {
let src = name.with_value(it);
let def: hir::Const = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::TypeAliasDef(it) => {
let src = name.with_value(it);
let def: hir::TypeAlias = sb.to_def(src)?;
Some(from_module_def(def.into()))
},
ast::MacroCall(it) => {
let src = name.with_value(it);
let def = sb.to_def(src.clone())?;
Some(NameDefinition {
kind: NameKind::Macro(def),
})
},
ast::TypeParam(it) => {
let src = name.with_value(it);
let def = sb.to_def(src)?;
Some(NameDefinition {
kind: NameKind::TypeParam(def),
})
},
_ => None,
}
}
}
pub fn from_struct_field(field: StructField) -> NameDefinition {
let kind = NameKind::StructField(field);
NameDefinition { kind }
}
pub fn from_module_def(def: ModuleDef) -> NameDefinition {
let kind = NameKind::ModuleDef(def);
NameDefinition { kind }
}
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