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|
//! FIXME: write short doc here
use either::Either;
use hir_def::{
nameres::ModuleSource,
src::{HasChildSource, HasSource as _},
Lookup, VariantId,
};
use ra_syntax::ast;
use crate::{
db::HirDatabase, Const, Enum, EnumVariant, FieldSource, Function, ImplDef, MacroDef, Module,
Static, Struct, StructField, Trait, TypeAlias, TypeParam, Union,
};
pub use hir_expand::InFile;
pub trait HasSource {
type Ast;
fn source(self, db: &dyn HirDatabase) -> InFile<Self::Ast>;
}
/// NB: Module is !HasSource, because it has two source nodes at the same time:
/// definition and declaration.
impl Module {
/// Returns a node which defines this module. That is, a file or a `mod foo {}` with items.
pub fn definition_source(self, db: &dyn HirDatabase) -> InFile<ModuleSource> {
let def_map = db.crate_def_map(self.id.krate);
def_map[self.id.local_id].definition_source(db.upcast())
}
/// Returns a node which declares this module, either a `mod foo;` or a `mod foo {}`.
/// `None` for the crate root.
pub fn declaration_source(self, db: &dyn HirDatabase) -> Option<InFile<ast::Module>> {
let def_map = db.crate_def_map(self.id.krate);
def_map[self.id.local_id].declaration_source(db.upcast())
}
}
impl HasSource for StructField {
type Ast = FieldSource;
fn source(self, db: &dyn HirDatabase) -> InFile<FieldSource> {
let var = VariantId::from(self.parent);
let src = var.child_source(db.upcast());
src.map(|it| match it[self.id].clone() {
Either::Left(it) => FieldSource::Pos(it),
Either::Right(it) => FieldSource::Named(it),
})
}
}
impl HasSource for Struct {
type Ast = ast::StructDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::StructDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for Union {
type Ast = ast::UnionDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::UnionDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for Enum {
type Ast = ast::EnumDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::EnumDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for EnumVariant {
type Ast = ast::EnumVariant;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::EnumVariant> {
self.parent.id.child_source(db.upcast()).map(|map| map[self.id].clone())
}
}
impl HasSource for Function {
type Ast = ast::FnDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::FnDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for Const {
type Ast = ast::ConstDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::ConstDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for Static {
type Ast = ast::StaticDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::StaticDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for Trait {
type Ast = ast::TraitDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::TraitDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for TypeAlias {
type Ast = ast::TypeAliasDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::TypeAliasDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for MacroDef {
type Ast = ast::MacroCall;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::MacroCall> {
InFile {
file_id: self.id.ast_id.expect("MacroDef without ast_id").file_id,
value: self.id.ast_id.expect("MacroDef without ast_id").to_node(db.upcast()),
}
}
}
impl HasSource for ImplDef {
type Ast = ast::ImplDef;
fn source(self, db: &dyn HirDatabase) -> InFile<ast::ImplDef> {
self.id.lookup(db.upcast()).source(db.upcast())
}
}
impl HasSource for TypeParam {
type Ast = Either<ast::TraitDef, ast::TypeParam>;
fn source(self, db: &dyn HirDatabase) -> InFile<Self::Ast> {
let child_source = self.id.parent.child_source(db.upcast());
child_source.map(|it| it[self.id.local_id].clone())
}
}
|
