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//! `SourceBinder` should be the main entry point for getting info about source code.
//! It's main task is to map source syntax trees to hir-level IDs.
//!
//! It is intended to subsume `FromSource` and `SourceAnalyzer`.
use hir_def::{
child_by_source::ChildBySource,
dyn_map::DynMap,
keys::{self, Key},
resolver::{HasResolver, Resolver},
ConstId, DefWithBodyId, EnumId, FunctionId, ImplId, ModuleId, StaticId, StructId, TraitId,
UnionId, VariantId,
};
use hir_expand::InFile;
use ra_prof::profile;
use ra_syntax::{ast, match_ast, AstNode, SyntaxNode, TextUnit};
use rustc_hash::FxHashMap;
use crate::{db::HirDatabase, ModuleSource, SourceAnalyzer};
pub struct SourceBinder<'a, DB> {
pub db: &'a DB,
child_by_source_cache: FxHashMap<ChildContainer, DynMap>,
}
impl<DB: HirDatabase> SourceBinder<'_, DB> {
pub fn new(db: &DB) -> SourceBinder<DB> {
SourceBinder { db, child_by_source_cache: FxHashMap::default() }
}
pub fn analyze(
&mut self,
src: InFile<&SyntaxNode>,
offset: Option<TextUnit>,
) -> SourceAnalyzer {
let _p = profile("SourceBinder::analyzer");
let container = match self.find_container(src) {
Some(it) => it,
None => return SourceAnalyzer::new_for_resolver(Resolver::default(), src),
};
let resolver = match container {
ChildContainer::DefWithBodyId(def) => {
return SourceAnalyzer::new_for_body(self.db, def, src, offset)
}
ChildContainer::TraitId(it) => it.resolver(self.db),
ChildContainer::ImplId(it) => it.resolver(self.db),
ChildContainer::ModuleId(it) => it.resolver(self.db),
ChildContainer::EnumId(it) => it.resolver(self.db),
ChildContainer::VariantId(it) => it.resolver(self.db),
};
SourceAnalyzer::new_for_resolver(resolver, src)
}
pub fn to_def<D, ID>(&mut self, src: InFile<ID::Ast>) -> Option<D>
where
D: From<ID>,
ID: ToId,
{
let id: ID = self.to_id(src)?;
Some(id.into())
}
fn to_id<D: ToId>(&mut self, src: InFile<D::Ast>) -> Option<D> {
let container = self.find_container(src.as_ref().map(|it| it.syntax()))?;
let db = self.db;
let dyn_map =
&*self.child_by_source_cache.entry(container).or_insert_with(|| match container {
ChildContainer::DefWithBodyId(it) => it.child_by_source(db),
ChildContainer::ModuleId(it) => it.child_by_source(db),
ChildContainer::TraitId(it) => it.child_by_source(db),
ChildContainer::ImplId(it) => it.child_by_source(db),
ChildContainer::EnumId(it) => it.child_by_source(db),
ChildContainer::VariantId(it) => it.child_by_source(db),
});
dyn_map[D::KEY].get(&src).copied()
}
fn find_container(&mut self, src: InFile<&SyntaxNode>) -> Option<ChildContainer> {
for container in src.cloned().ancestors_with_macros(self.db).skip(1) {
let res: ChildContainer = match_ast! {
match (container.value) {
ast::TraitDef(it) => {
let def: TraitId = self.to_id(container.with_value(it))?;
def.into()
},
ast::ImplBlock(it) => {
let def: ImplId = self.to_id(container.with_value(it))?;
def.into()
},
ast::FnDef(it) => {
let def: FunctionId = self.to_id(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::StaticDef(it) => {
let def: StaticId = self.to_id(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::ConstDef(it) => {
let def: ConstId = self.to_id(container.with_value(it))?;
DefWithBodyId::from(def).into()
},
ast::EnumDef(it) => {
let def: EnumId = self.to_id(container.with_value(it))?;
def.into()
},
ast::StructDef(it) => {
let def: StructId = self.to_id(container.with_value(it))?;
VariantId::from(def).into()
},
ast::UnionDef(it) => {
let def: UnionId = self.to_id(container.with_value(it))?;
VariantId::from(def).into()
},
// FIXME: handle out-of-line modules here
_ => { continue },
}
};
return Some(res);
}
let module_source = ModuleSource::from_child_node(self.db, src);
let c = crate::Module::from_definition(self.db, src.with_value(module_source))?;
Some(c.id.into())
}
}
#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
enum ChildContainer {
DefWithBodyId(DefWithBodyId),
ModuleId(ModuleId),
TraitId(TraitId),
ImplId(ImplId),
EnumId(EnumId),
VariantId(VariantId),
}
impl_froms! {
ChildContainer:
DefWithBodyId,
ModuleId,
TraitId,
ImplId,
EnumId,
VariantId,
}
pub trait ToId: Sized + Copy + 'static {
type Ast: AstNode + 'static;
const KEY: Key<Self::Ast, Self>;
}
macro_rules! to_id_impls {
($(($id:ident, $ast:path, $key:path)),* ,) => {$(
impl ToId for $id {
type Ast = $ast;
const KEY: Key<Self::Ast, Self> = $key;
}
)*}
}
to_id_impls![
(StructId, ast::StructDef, keys::STRUCT),
(UnionId, ast::UnionDef, keys::UNION),
(EnumId, ast::EnumDef, keys::ENUM),
(TraitId, ast::TraitDef, keys::TRAIT),
(FunctionId, ast::FnDef, keys::FUNCTION),
(StaticId, ast::StaticDef, keys::STATIC),
(ConstId, ast::ConstDef, keys::CONST),
// (TypeAlias, TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
(ImplId, ast::ImplBlock, keys::IMPL),
];
|
