From b28c54a2c239acd73f2eea80fda9ee3960d2c046 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 13 Aug 2020 16:28:27 +0200
Subject: Rename ra_hir_def -> hir_def

---
 crates/hir_def/src/keys.rs | 58 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 crates/hir_def/src/keys.rs

(limited to 'crates/hir_def/src/keys.rs')

diff --git a/crates/hir_def/src/keys.rs b/crates/hir_def/src/keys.rs
new file mode 100644
index 000000000..40a5d92b5
--- /dev/null
+++ b/crates/hir_def/src/keys.rs
@@ -0,0 +1,58 @@
+//! keys to be used with `DynMap`
+
+use std::marker::PhantomData;
+
+use hir_expand::{InFile, MacroDefId};
+use rustc_hash::FxHashMap;
+use syntax::{ast, AstNode, AstPtr};
+
+use crate::{
+    dyn_map::{DynMap, Policy},
+    ConstId, EnumId, EnumVariantId, FieldId, FunctionId, ImplId, StaticId, StructId, TraitId,
+    TypeAliasId, TypeParamId, UnionId,
+};
+
+pub type Key<K, V> = crate::dyn_map::Key<InFile<K>, V, AstPtrPolicy<K, V>>;
+
+pub const FUNCTION: Key<ast::Fn, FunctionId> = Key::new();
+pub const CONST: Key<ast::Const, ConstId> = Key::new();
+pub const STATIC: Key<ast::Static, StaticId> = Key::new();
+pub const TYPE_ALIAS: Key<ast::TypeAlias, TypeAliasId> = Key::new();
+pub const IMPL: Key<ast::Impl, ImplId> = Key::new();
+pub const TRAIT: Key<ast::Trait, TraitId> = Key::new();
+pub const STRUCT: Key<ast::Struct, StructId> = Key::new();
+pub const UNION: Key<ast::Union, UnionId> = Key::new();
+pub const ENUM: Key<ast::Enum, EnumId> = Key::new();
+
+pub const VARIANT: Key<ast::Variant, EnumVariantId> = Key::new();
+pub const TUPLE_FIELD: Key<ast::TupleField, FieldId> = Key::new();
+pub const RECORD_FIELD: Key<ast::RecordField, FieldId> = Key::new();
+pub const TYPE_PARAM: Key<ast::TypeParam, TypeParamId> = Key::new();
+
+pub const MACRO: Key<ast::MacroCall, MacroDefId> = Key::new();
+
+/// XXX: AST Nodes and SyntaxNodes have identity equality semantics: nodes are
+/// equal if they point to exactly the same object.
+///
+/// In general, we do not guarantee that we have exactly one instance of a
+/// syntax tree for each file. We probably should add such guarantee, but, for
+/// the time being, we will use identity-less AstPtr comparison.
+pub struct AstPtrPolicy<AST, ID> {
+    _phantom: PhantomData<(AST, ID)>,
+}
+
+impl<AST: AstNode + 'static, ID: 'static> Policy for AstPtrPolicy<AST, ID> {
+    type K = InFile<AST>;
+    type V = ID;
+    fn insert(map: &mut DynMap, key: InFile<AST>, value: ID) {
+        let key = key.as_ref().map(AstPtr::new);
+        map.map
+            .entry::<FxHashMap<InFile<AstPtr<AST>>, ID>>()
+            .or_insert_with(Default::default)
+            .insert(key, value);
+    }
+    fn get<'a>(map: &'a DynMap, key: &InFile<AST>) -> Option<&'a ID> {
+        let key = key.as_ref().map(AstPtr::new);
+        map.map.get::<FxHashMap<InFile<AstPtr<AST>>, ID>>()?.get(&key)
+    }
+}
-- 
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