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Dedupe from_source impls

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This commit is contained in:
Aleksey Kladov 2019-12-12 15:50:16 +01:00
parent 7a255a2f93
commit 8e65b77387
2 changed files with 35 additions and 78 deletions
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111
crates/ra_hir/src/from_source.rs
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@ -1,7 +1,8 @@
//! FIXME: write short doc here
use hir_def::{
child_by_source::ChildBySource, dyn_map::DynMap, keys, nameres::ModuleSource, EnumVariantId,
GenericDefId, ModuleId, VariantId,
child_by_source::ChildBySource, dyn_map::DynMap, keys, keys::Key, nameres::ModuleSource,
ConstId, EnumId, EnumVariantId, FunctionId, GenericDefId, ImplId, ModuleId, StaticId, StructId,
TraitId, TypeAliasId, UnionId, VariantId,
};
use hir_expand::{name::AsName, AstId, MacroDefId, MacroDefKind};
use ra_syntax::{
@ -20,80 +21,46 @@ pub trait FromSource: Sized {
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self>;
}
impl FromSource for Struct {
type Ast = ast::StructDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::STRUCT]
.get(&src)
.copied()
.map(Struct::from)
}
pub trait FromSourceByContainer: Sized {
type Ast: AstNode + 'static;
type Id: Copy + 'static;
const KEY: Key<Self::Ast, Self::Id>;
}
impl FromSource for Union {
type Ast = ast::UnionDef;
impl<T: FromSourceByContainer> FromSource for T
where
T: From<<T as FromSourceByContainer>::Id>,
{
type Ast = <T as FromSourceByContainer>::Ast;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::UNION]
analyze_container(db, src.as_ref().map(|it| it.syntax()))[T::KEY]
.get(&src)
.copied()
.map(Union::from)
}
}
impl FromSource for Enum {
type Ast = ast::EnumDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::ENUM]
.get(&src)
.copied()
.map(Enum::from)
}
}
impl FromSource for Trait {
type Ast = ast::TraitDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::TRAIT]
.get(&src)
.copied()
.map(Trait::from)
}
}
impl FromSource for Function {
type Ast = ast::FnDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::FUNCTION]
.get(&src)
.copied()
.map(Function::from)
.map(Self::from)
}
}
impl FromSource for Const {
type Ast = ast::ConstDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::CONST]
.get(&src)
.copied()
.map(Const::from)
}
}
impl FromSource for Static {
type Ast = ast::StaticDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::STATIC]
.get(&src)
.copied()
.map(Static::from)
}
macro_rules! from_source_by_container_impls {
($(($hir:ident, $id:ident, $ast:path, $key:path)),* ,) => {$(
impl FromSourceByContainer for $hir {
type Ast = $ast;
type Id = $id;
const KEY: Key<Self::Ast, Self::Id> = $key;
}
)*}
}
impl FromSource for TypeAlias {
type Ast = ast::TypeAliasDef;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::TYPE_ALIAS]
.get(&src)
.copied()
.map(TypeAlias::from)
}
}
from_source_by_container_impls![
(Struct, StructId, ast::StructDef, keys::STRUCT),
(Union, UnionId, ast::UnionDef, keys::UNION),
(Enum, EnumId, ast::EnumDef, keys::ENUM),
(Trait, TraitId, ast::TraitDef, keys::TRAIT),
(Function, FunctionId, ast::FnDef, keys::FUNCTION),
(Static, StaticId, ast::StaticDef, keys::STATIC),
(Const, ConstId, ast::ConstDef, keys::CONST),
(TypeAlias, TypeAliasId, ast::TypeAliasDef, keys::TYPE_ALIAS),
(ImplBlock, ImplId, ast::ImplBlock, keys::IMPL),
];
impl FromSource for MacroDef {
type Ast = ast::MacroCall;
@ -111,16 +78,6 @@ impl FromSource for MacroDef {
}
}
impl FromSource for ImplBlock {
type Ast = ast::ImplBlock;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {
analyze_container(db, src.as_ref().map(|it| it.syntax()))[keys::IMPL]
.get(&src)
.copied()
.map(ImplBlock::from)
}
}
impl FromSource for EnumVariant {
type Ast = ast::EnumVariant;
fn from_source(db: &(impl DefDatabase + AstDatabase), src: InFile<Self::Ast>) -> Option<Self> {