266 lines
10 KiB
Rust
266 lines
10 KiB
Rust
//! Finds a corresponding hir data structure for a syntax node in a specific
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//! file.
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use hir_def::{
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child_by_source::ChildBySource, dyn_map::DynMap, keys, keys::Key, nameres::ModuleSource,
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ConstId, DefWithBodyId, EnumId, EnumVariantId, FunctionId, GenericDefId, ImplId, ModuleId,
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StaticId, StructId, TraitId, TypeAliasId, UnionId, VariantId,
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};
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use hir_expand::{name::AsName, AstId, MacroDefId, MacroDefKind};
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use ra_db::FileId;
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use ra_prof::profile;
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use ra_syntax::{
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ast::{self, AstNode, NameOwner},
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match_ast, SyntaxNode,
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};
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use crate::{
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db::{DefDatabase, HirDatabase},
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Const, DefWithBody, Enum, EnumVariant, FieldSource, Function, ImplBlock, InFile, Local,
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MacroDef, Module, Static, Struct, StructField, Trait, TypeAlias, TypeParam, Union,
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};
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pub trait FromSource: Sized {
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type Ast;
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fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self>;
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}
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pub trait FromSourceByContainer: Sized {
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type Ast: AstNode + 'static;
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type Id: Copy + 'static;
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const KEY: Key<Self::Ast, Self::Id>;
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}
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impl<T: FromSourceByContainer> FromSource for T
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where
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T: From<<T as FromSourceByContainer>::Id>,
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{
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type Ast = <T as FromSourceByContainer>::Ast;
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fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
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analyze_container(db, src.as_ref().map(|it| it.syntax()))[T::KEY]
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.get(&src)
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.copied()
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.map(Self::from)
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}
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}
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macro_rules! from_source_by_container_impls {
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($(($hir:ident, $id:ident, $ast:path, $key:path)),* ,) => {$(
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impl FromSourceByContainer for $hir {
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type Ast = $ast;
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type Id = $id;
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const KEY: Key<Self::Ast, Self::Id> = $key;
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}
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)*}
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}
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from_source_by_container_impls![
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(Struct, StructId, ast::StructDef, keys::STRUCT),
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(Union, UnionId, ast::UnionDef, keys::UNION),
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(Enum, EnumId, ast::EnumDef, keys::ENUM),
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(Trait, TraitId, ast::TraitDef, keys::TRAIT),
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(Function, FunctionId, ast::FnDef, keys::FUNCTION),
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(Static, StaticId, ast::StaticDef, keys::STATIC),
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(Const, ConstId, ast::ConstDef, keys::CONST),
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(TypeAlias, TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
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(ImplBlock, ImplId, ast::ImplBlock, keys::IMPL),
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];
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impl FromSource for MacroDef {
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type Ast = ast::MacroCall;
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fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
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let kind = MacroDefKind::Declarative;
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let module_src = ModuleSource::from_child_node(db, src.as_ref().map(|it| it.syntax()));
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let module = Module::from_definition(db, InFile::new(src.file_id, module_src))?;
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let krate = Some(module.krate().id);
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let ast_id = Some(AstId::new(src.file_id, db.ast_id_map(src.file_id).ast_id(&src.value)));
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let id: MacroDefId = MacroDefId { krate, ast_id, kind };
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Some(MacroDef { id })
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}
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}
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impl FromSource for EnumVariant {
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type Ast = ast::EnumVariant;
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fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
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let parent_enum = src.value.parent_enum();
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let src_enum = InFile { file_id: src.file_id, value: parent_enum };
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let parent_enum = Enum::from_source(db, src_enum)?;
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parent_enum.id.child_by_source(db)[keys::ENUM_VARIANT]
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.get(&src)
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.copied()
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.map(EnumVariant::from)
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}
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}
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impl FromSource for StructField {
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type Ast = FieldSource;
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fn from_source(db: &impl DefDatabase, src: InFile<Self::Ast>) -> Option<Self> {
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let src = src.as_ref();
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// FIXME this is buggy
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let variant_id: VariantId = match src.value {
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FieldSource::Named(field) => {
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let value = field.syntax().ancestors().find_map(ast::StructDef::cast)?;
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let src = InFile { file_id: src.file_id, value };
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let def = Struct::from_source(db, src)?;
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def.id.into()
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}
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FieldSource::Pos(field) => {
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let value = field.syntax().ancestors().find_map(ast::EnumVariant::cast)?;
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let src = InFile { file_id: src.file_id, value };
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let def = EnumVariant::from_source(db, src)?;
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EnumVariantId::from(def).into()
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}
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};
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let dyn_map = variant_id.child_by_source(db);
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match src.value {
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FieldSource::Pos(it) => dyn_map[keys::TUPLE_FIELD].get(&src.with_value(it.clone())),
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FieldSource::Named(it) => dyn_map[keys::RECORD_FIELD].get(&src.with_value(it.clone())),
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}
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.copied()
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.map(StructField::from)
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}
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}
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impl Local {
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pub fn from_source(db: &impl HirDatabase, src: InFile<ast::BindPat>) -> Option<Self> {
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let file_id = src.file_id;
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let parent: DefWithBody = src.value.syntax().ancestors().find_map(|it| {
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let res = match_ast! {
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match it {
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ast::ConstDef(value) => { Const::from_source(db, InFile { value, file_id})?.into() },
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ast::StaticDef(value) => { Static::from_source(db, InFile { value, file_id})?.into() },
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ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.into() },
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_ => return None,
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}
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};
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Some(res)
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})?;
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let (_body, source_map) = db.body_with_source_map(parent.into());
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let src = src.map(ast::Pat::from);
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let pat_id = source_map.node_pat(src.as_ref())?;
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Some(Local { parent, pat_id })
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}
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}
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impl TypeParam {
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pub fn from_source(db: &impl HirDatabase, src: InFile<ast::TypeParam>) -> Option<Self> {
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let file_id = src.file_id;
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let parent: GenericDefId = src.value.syntax().ancestors().find_map(|it| {
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let res = match_ast! {
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match it {
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ast::FnDef(value) => { Function::from_source(db, InFile { value, file_id})?.id.into() },
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ast::StructDef(value) => { Struct::from_source(db, InFile { value, file_id})?.id.into() },
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ast::EnumDef(value) => { Enum::from_source(db, InFile { value, file_id})?.id.into() },
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ast::TraitDef(value) => { Trait::from_source(db, InFile { value, file_id})?.id.into() },
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ast::TypeAliasDef(value) => { TypeAlias::from_source(db, InFile { value, file_id})?.id.into() },
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ast::ImplBlock(value) => { ImplBlock::from_source(db, InFile { value, file_id})?.id.into() },
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_ => return None,
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}
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};
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Some(res)
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})?;
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let &id = parent.child_by_source(db)[keys::TYPE_PARAM].get(&src)?;
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Some(TypeParam { id })
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}
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}
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impl Module {
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pub fn from_declaration(db: &impl DefDatabase, src: InFile<ast::Module>) -> Option<Self> {
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let _p = profile("Module::from_declaration");
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let parent_declaration = src.value.syntax().ancestors().skip(1).find_map(ast::Module::cast);
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let parent_module = match parent_declaration {
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Some(parent_declaration) => {
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let src_parent = InFile { file_id: src.file_id, value: parent_declaration };
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Module::from_declaration(db, src_parent)
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}
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None => {
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let source_file = db.parse(src.file_id.original_file(db)).tree();
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let src_parent =
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InFile { file_id: src.file_id, value: ModuleSource::SourceFile(source_file) };
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Module::from_definition(db, src_parent)
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}
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}?;
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let child_name = src.value.name()?.as_name();
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let def_map = db.crate_def_map(parent_module.id.krate);
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let child_id = def_map[parent_module.id.local_id].children.get(&child_name)?;
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Some(parent_module.with_module_id(*child_id))
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}
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pub fn from_definition(db: &impl DefDatabase, src: InFile<ModuleSource>) -> Option<Self> {
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let _p = profile("Module::from_definition");
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match src.value {
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ModuleSource::Module(ref module) => {
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assert!(!module.has_semi());
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return Module::from_declaration(
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db,
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InFile { file_id: src.file_id, value: module.clone() },
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);
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}
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ModuleSource::SourceFile(_) => (),
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};
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let original_file = src.file_id.original_file(db);
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Module::from_file(db, original_file)
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}
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fn from_file(db: &impl DefDatabase, file: FileId) -> Option<Self> {
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let _p = profile("Module::from_file");
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let (krate, local_id) = db.relevant_crates(file).iter().find_map(|&crate_id| {
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let crate_def_map = db.crate_def_map(crate_id);
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let local_id = crate_def_map.modules_for_file(file).next()?;
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Some((crate_id, local_id))
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})?;
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Some(Module { id: ModuleId { krate, local_id } })
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}
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}
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fn analyze_container(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> DynMap {
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let _p = profile("analyze_container");
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return child_by_source(db, src).unwrap_or_default();
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fn child_by_source(db: &impl DefDatabase, src: InFile<&SyntaxNode>) -> Option<DynMap> {
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for container in src.value.ancestors().skip(1) {
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let res = match_ast! {
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match container {
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ast::TraitDef(it) => {
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let def = Trait::from_source(db, src.with_value(it))?;
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def.id.child_by_source(db)
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},
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ast::ImplBlock(it) => {
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let def = ImplBlock::from_source(db, src.with_value(it))?;
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def.id.child_by_source(db)
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},
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ast::FnDef(it) => {
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let def = Function::from_source(db, src.with_value(it))?;
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DefWithBodyId::from(def.id)
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.child_by_source(db)
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},
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ast::StaticDef(it) => {
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let def = Static::from_source(db, src.with_value(it))?;
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DefWithBodyId::from(def.id)
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.child_by_source(db)
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},
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ast::ConstDef(it) => {
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let def = Const::from_source(db, src.with_value(it))?;
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DefWithBodyId::from(def.id)
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.child_by_source(db)
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},
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_ => { continue },
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}
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};
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return Some(res);
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}
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let module_source = ModuleSource::from_child_node(db, src);
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let c = Module::from_definition(db, src.with_value(module_source))?;
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Some(c.id.child_by_source(db))
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}
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}
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