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|
//! `hir_def` crate contains everything between macro expansion and type
//! inference.
//!
//! It defines various items (structs, enums, traits) which comprises Rust code,
//! as well as an algorithm for resolving paths to such entities.
//!
//! Note that `hir_def` is a work in progress, so not all of the above is
//! actually true.
pub mod db;
pub mod attr;
pub mod path;
pub mod type_ref;
pub mod builtin_type;
pub mod adt;
pub mod diagnostics;
pub mod expr;
pub mod body;
pub mod generics;
pub mod resolver;
pub mod data;
pub mod lang_item;
pub mod docs;
pub mod per_ns;
mod trace;
mod nameres;
#[cfg(test)]
mod test_db;
#[cfg(test)]
mod marks;
use std::hash::{Hash, Hasher};
use hir_expand::{ast_id_map::FileAstId, db::AstDatabase, AstId, HirFileId, MacroDefId, Source};
use ra_arena::{impl_arena_id, map::ArenaMap, RawId};
use ra_db::{impl_intern_key, salsa, CrateId};
use ra_syntax::{ast, AstNode};
use crate::{builtin_type::BuiltinType, db::InternDatabase};
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LocalImportId(RawId);
impl_arena_id!(LocalImportId);
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct ModuleId {
pub krate: CrateId,
pub module_id: LocalModuleId,
}
/// An ID of a module, **local** to a specific crate
// FIXME: rename to `LocalModuleId`.
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct LocalModuleId(RawId);
impl_arena_id!(LocalModuleId);
#[derive(Debug)]
pub struct ItemLoc<N: AstNode> {
pub(crate) module: ModuleId,
ast_id: AstId<N>,
}
impl<N: AstNode> PartialEq for ItemLoc<N> {
fn eq(&self, other: &Self) -> bool {
self.module == other.module && self.ast_id == other.ast_id
}
}
impl<N: AstNode> Eq for ItemLoc<N> {}
impl<N: AstNode> Hash for ItemLoc<N> {
fn hash<H: Hasher>(&self, hasher: &mut H) {
self.module.hash(hasher);
self.ast_id.hash(hasher);
}
}
impl<N: AstNode> Clone for ItemLoc<N> {
fn clone(&self) -> ItemLoc<N> {
ItemLoc { module: self.module, ast_id: self.ast_id }
}
}
#[derive(Clone, Copy)]
pub struct LocationCtx<DB> {
db: DB,
module: ModuleId,
file_id: HirFileId,
}
impl<'a, DB> LocationCtx<&'a DB> {
pub fn new(db: &'a DB, module: ModuleId, file_id: HirFileId) -> LocationCtx<&'a DB> {
LocationCtx { db, module, file_id }
}
}
impl<'a, DB: AstDatabase + InternDatabase> LocationCtx<&'a DB> {
pub fn to_def<N, DEF>(self, ast: &N) -> DEF
where
N: AstNode,
DEF: AstItemDef<N>,
{
DEF::from_ast(self, ast)
}
}
pub trait AstItemDef<N: AstNode>: salsa::InternKey + Clone {
fn intern(db: &impl InternDatabase, loc: ItemLoc<N>) -> Self;
fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<N>;
fn from_ast(ctx: LocationCtx<&(impl AstDatabase + InternDatabase)>, ast: &N) -> Self {
let items = ctx.db.ast_id_map(ctx.file_id);
let item_id = items.ast_id(ast);
Self::from_ast_id(ctx, item_id)
}
fn from_ast_id(ctx: LocationCtx<&impl InternDatabase>, ast_id: FileAstId<N>) -> Self {
let loc = ItemLoc { module: ctx.module, ast_id: AstId::new(ctx.file_id, ast_id) };
Self::intern(ctx.db, loc)
}
fn source(self, db: &(impl AstDatabase + InternDatabase)) -> Source<N> {
let loc = self.lookup_intern(db);
let value = loc.ast_id.to_node(db);
Source { file_id: loc.ast_id.file_id(), value }
}
fn module(self, db: &impl InternDatabase) -> ModuleId {
let loc = self.lookup_intern(db);
loc.module
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct FunctionId(salsa::InternId);
impl_intern_key!(FunctionId);
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct FunctionLoc {
pub container: ContainerId,
pub ast_id: AstId<ast::FnDef>,
}
impl Intern for FunctionLoc {
type ID = FunctionId;
fn intern(self, db: &impl db::DefDatabase) -> FunctionId {
db.intern_function(self)
}
}
impl Lookup for FunctionId {
type Data = FunctionLoc;
fn lookup(&self, db: &impl db::DefDatabase) -> FunctionLoc {
db.lookup_intern_function(*self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StructOrUnionId(salsa::InternId);
impl_intern_key!(StructOrUnionId);
impl AstItemDef<ast::StructDef> for StructOrUnionId {
fn intern(db: &impl InternDatabase, loc: ItemLoc<ast::StructDef>) -> Self {
db.intern_struct_or_union(loc)
}
fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<ast::StructDef> {
db.lookup_intern_struct_or_union(self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StructId(pub StructOrUnionId);
impl From<StructId> for StructOrUnionId {
fn from(id: StructId) -> StructOrUnionId {
id.0
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct UnionId(pub StructOrUnionId);
impl From<UnionId> for StructOrUnionId {
fn from(id: UnionId) -> StructOrUnionId {
id.0
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct EnumId(salsa::InternId);
impl_intern_key!(EnumId);
impl AstItemDef<ast::EnumDef> for EnumId {
fn intern(db: &impl InternDatabase, loc: ItemLoc<ast::EnumDef>) -> Self {
db.intern_enum(loc)
}
fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<ast::EnumDef> {
db.lookup_intern_enum(self)
}
}
// FIXME: rename to `VariantId`, only enums can ave variants
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct EnumVariantId {
pub parent: EnumId,
pub local_id: LocalEnumVariantId,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LocalEnumVariantId(RawId);
impl_arena_id!(LocalEnumVariantId);
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum VariantId {
EnumVariantId(EnumVariantId),
StructId(StructId),
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StructFieldId {
pub parent: VariantId,
pub local_id: LocalStructFieldId,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct LocalStructFieldId(RawId);
impl_arena_id!(LocalStructFieldId);
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct ConstId(salsa::InternId);
impl_intern_key!(ConstId);
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ConstLoc {
pub container: ContainerId,
pub ast_id: AstId<ast::ConstDef>,
}
impl Intern for ConstLoc {
type ID = ConstId;
fn intern(self, db: &impl db::DefDatabase) -> ConstId {
db.intern_const(self)
}
}
impl Lookup for ConstId {
type Data = ConstLoc;
fn lookup(&self, db: &impl db::DefDatabase) -> ConstLoc {
db.lookup_intern_const(*self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct StaticId(salsa::InternId);
impl_intern_key!(StaticId);
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct StaticLoc {
pub container: ModuleId,
pub ast_id: AstId<ast::StaticDef>,
}
impl Intern for StaticLoc {
type ID = StaticId;
fn intern(self, db: &impl db::DefDatabase) -> StaticId {
db.intern_static(self)
}
}
impl Lookup for StaticId {
type Data = StaticLoc;
fn lookup(&self, db: &impl db::DefDatabase) -> StaticLoc {
db.lookup_intern_static(*self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct TraitId(salsa::InternId);
impl_intern_key!(TraitId);
impl AstItemDef<ast::TraitDef> for TraitId {
fn intern(db: &impl InternDatabase, loc: ItemLoc<ast::TraitDef>) -> Self {
db.intern_trait(loc)
}
fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<ast::TraitDef> {
db.lookup_intern_trait(self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct TypeAliasId(salsa::InternId);
impl_intern_key!(TypeAliasId);
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct TypeAliasLoc {
pub container: ContainerId,
pub ast_id: AstId<ast::TypeAliasDef>,
}
impl Intern for TypeAliasLoc {
type ID = TypeAliasId;
fn intern(self, db: &impl db::DefDatabase) -> TypeAliasId {
db.intern_type_alias(self)
}
}
impl Lookup for TypeAliasId {
type Data = TypeAliasLoc;
fn lookup(&self, db: &impl db::DefDatabase) -> TypeAliasLoc {
db.lookup_intern_type_alias(*self)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct ImplId(salsa::InternId);
impl_intern_key!(ImplId);
impl AstItemDef<ast::ImplBlock> for ImplId {
fn intern(db: &impl InternDatabase, loc: ItemLoc<ast::ImplBlock>) -> Self {
db.intern_impl(loc)
}
fn lookup_intern(self, db: &impl InternDatabase) -> ItemLoc<ast::ImplBlock> {
db.lookup_intern_impl(self)
}
}
macro_rules! impl_froms {
($e:ident: $($v:ident $(($($sv:ident),*))?),*) => {
$(
impl From<$v> for $e {
fn from(it: $v) -> $e {
$e::$v(it)
}
}
$($(
impl From<$sv> for $e {
fn from(it: $sv) -> $e {
$e::$v($v::$sv(it))
}
}
)*)?
)*
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum ContainerId {
ModuleId(ModuleId),
ImplId(ImplId),
TraitId(TraitId),
}
/// A Data Type
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum AdtId {
StructId(StructId),
UnionId(UnionId),
EnumId(EnumId),
}
impl_froms!(AdtId: StructId, UnionId, EnumId);
/// The defs which can be visible in the module.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum ModuleDefId {
ModuleId(ModuleId),
FunctionId(FunctionId),
AdtId(AdtId),
// Can't be directly declared, but can be imported.
EnumVariantId(EnumVariantId),
ConstId(ConstId),
StaticId(StaticId),
TraitId(TraitId),
TypeAliasId(TypeAliasId),
BuiltinType(BuiltinType),
}
impl_froms!(
ModuleDefId: ModuleId,
FunctionId,
AdtId(StructId, EnumId, UnionId),
EnumVariantId,
ConstId,
StaticId,
TraitId,
TypeAliasId,
BuiltinType
);
/// The defs which have a body.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum DefWithBodyId {
FunctionId(FunctionId),
StaticId(StaticId),
ConstId(ConstId),
}
impl_froms!(DefWithBodyId: FunctionId, ConstId, StaticId);
#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
pub enum AssocItemId {
FunctionId(FunctionId),
ConstId(ConstId),
TypeAliasId(TypeAliasId),
}
// FIXME: not every function, ... is actually an assoc item. maybe we should make
// sure that you can only turn actual assoc items into AssocItemIds. This would
// require not implementing From, and instead having some checked way of
// casting them, and somehow making the constructors private, which would be annoying.
impl_froms!(AssocItemId: FunctionId, ConstId, TypeAliasId);
#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
pub enum GenericDefId {
FunctionId(FunctionId),
AdtId(AdtId),
TraitId(TraitId),
TypeAliasId(TypeAliasId),
ImplId(ImplId),
// enum variants cannot have generics themselves, but their parent enums
// can, and this makes some code easier to write
EnumVariantId(EnumVariantId),
// consts can have type parameters from their parents (i.e. associated consts of traits)
ConstId(ConstId),
}
impl_froms!(
GenericDefId: FunctionId,
AdtId(StructId, EnumId, UnionId),
TraitId,
TypeAliasId,
ImplId,
EnumVariantId,
ConstId
);
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum AttrDefId {
ModuleId(ModuleId),
StructFieldId(StructFieldId),
AdtId(AdtId),
FunctionId(FunctionId),
EnumVariantId(EnumVariantId),
StaticId(StaticId),
ConstId(ConstId),
TraitId(TraitId),
TypeAliasId(TypeAliasId),
MacroDefId(MacroDefId),
ImplId(ImplId),
}
impl_froms!(
AttrDefId: ModuleId,
StructFieldId,
AdtId(StructId, EnumId, UnionId),
EnumVariantId,
StaticId,
ConstId,
FunctionId,
TraitId,
TypeAliasId,
MacroDefId,
ImplId
);
trait Intern {
type ID;
fn intern(self, db: &impl db::DefDatabase) -> Self::ID;
}
pub trait Lookup {
type Data;
fn lookup(&self, db: &impl db::DefDatabase) -> Self::Data;
}
pub trait HasModule {
fn module(&self, db: &impl db::DefDatabase) -> ModuleId;
}
impl HasModule for FunctionLoc {
fn module(&self, db: &impl db::DefDatabase) -> ModuleId {
match self.container {
ContainerId::ModuleId(it) => it,
ContainerId::ImplId(it) => it.module(db),
ContainerId::TraitId(it) => it.module(db),
}
}
}
impl HasModule for TypeAliasLoc {
fn module(&self, db: &impl db::DefDatabase) -> ModuleId {
match self.container {
ContainerId::ModuleId(it) => it,
ContainerId::ImplId(it) => it.module(db),
ContainerId::TraitId(it) => it.module(db),
}
}
}
impl HasModule for ConstLoc {
fn module(&self, db: &impl db::DefDatabase) -> ModuleId {
match self.container {
ContainerId::ModuleId(it) => it,
ContainerId::ImplId(it) => it.module(db),
ContainerId::TraitId(it) => it.module(db),
}
}
}
impl HasModule for StaticLoc {
fn module(&self, _db: &impl db::DefDatabase) -> ModuleId {
self.container
}
}
pub trait HasSource {
type Value;
fn source(&self, db: &impl db::DefDatabase) -> Source<Self::Value>;
}
impl HasSource for FunctionLoc {
type Value = ast::FnDef;
fn source(&self, db: &impl db::DefDatabase) -> Source<ast::FnDef> {
let node = self.ast_id.to_node(db);
Source::new(self.ast_id.file_id(), node)
}
}
impl HasSource for TypeAliasLoc {
type Value = ast::TypeAliasDef;
fn source(&self, db: &impl db::DefDatabase) -> Source<ast::TypeAliasDef> {
let node = self.ast_id.to_node(db);
Source::new(self.ast_id.file_id(), node)
}
}
impl HasSource for ConstLoc {
type Value = ast::ConstDef;
fn source(&self, db: &impl db::DefDatabase) -> Source<ast::ConstDef> {
let node = self.ast_id.to_node(db);
Source::new(self.ast_id.file_id(), node)
}
}
impl HasSource for StaticLoc {
type Value = ast::StaticDef;
fn source(&self, db: &impl db::DefDatabase) -> Source<ast::StaticDef> {
let node = self.ast_id.to_node(db);
Source::new(self.ast_id.file_id(), node)
}
}
pub trait HasChildSource {
type ChildId;
type Value;
fn child_source(
&self,
db: &impl db::DefDatabase,
) -> Source<ArenaMap<Self::ChildId, Self::Value>>;
}
|