From 5b803055b7b690a57f1c08da8f1640139c739e76 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Tue, 29 Oct 2019 14:59:55 +0300
Subject: rename hir_def -> hir_expand

---
 crates/ra_hir_def/src/ast_id_map.rs | 114 ------------------------------------
 1 file changed, 114 deletions(-)
 delete mode 100644 crates/ra_hir_def/src/ast_id_map.rs

(limited to 'crates/ra_hir_def/src/ast_id_map.rs')

diff --git a/crates/ra_hir_def/src/ast_id_map.rs b/crates/ra_hir_def/src/ast_id_map.rs
deleted file mode 100644
index c3b389102..000000000
--- a/crates/ra_hir_def/src/ast_id_map.rs
+++ /dev/null
@@ -1,114 +0,0 @@
-//! `AstIdMap` allows to create stable IDs for "large" syntax nodes like items
-//! and macro calls.
-//!
-//! Specifically, it enumerates all items in a file and uses position of a an
-//! item as an ID. That way, id's don't change unless the set of items itself
-//! changes.
-
-use std::{
-    hash::{Hash, Hasher},
-    marker::PhantomData,
-    ops,
-};
-
-use ra_arena::{impl_arena_id, Arena, RawId};
-use ra_syntax::{ast, AstNode, SyntaxNode, SyntaxNodePtr};
-
-/// `AstId` points to an AST node in a specific file.
-#[derive(Debug)]
-pub struct FileAstId<N: AstNode> {
-    raw: ErasedFileAstId,
-    _ty: PhantomData<fn() -> N>,
-}
-
-impl<N: AstNode> Clone for FileAstId<N> {
-    fn clone(&self) -> FileAstId<N> {
-        *self
-    }
-}
-impl<N: AstNode> Copy for FileAstId<N> {}
-
-impl<N: AstNode> PartialEq for FileAstId<N> {
-    fn eq(&self, other: &Self) -> bool {
-        self.raw == other.raw
-    }
-}
-impl<N: AstNode> Eq for FileAstId<N> {}
-impl<N: AstNode> Hash for FileAstId<N> {
-    fn hash<H: Hasher>(&self, hasher: &mut H) {
-        self.raw.hash(hasher);
-    }
-}
-
-impl<N: AstNode> From<FileAstId<N>> for ErasedFileAstId {
-    fn from(id: FileAstId<N>) -> Self {
-        id.raw
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct ErasedFileAstId(RawId);
-impl_arena_id!(ErasedFileAstId);
-
-/// Maps items' `SyntaxNode`s to `ErasedFileAstId`s and back.
-#[derive(Debug, PartialEq, Eq, Default)]
-pub struct AstIdMap {
-    arena: Arena<ErasedFileAstId, SyntaxNodePtr>,
-}
-
-impl AstIdMap {
-    pub fn from_source(node: &SyntaxNode) -> AstIdMap {
-        assert!(node.parent().is_none());
-        let mut res = AstIdMap { arena: Arena::default() };
-        // By walking the tree in bread-first order we make sure that parents
-        // get lower ids then children. That is, adding a new child does not
-        // change parent's id. This means that, say, adding a new function to a
-        // trait does not change ids of top-level items, which helps caching.
-        bfs(node, |it| {
-            if let Some(module_item) = ast::ModuleItem::cast(it.clone()) {
-                res.alloc(module_item.syntax());
-            } else if let Some(macro_call) = ast::MacroCall::cast(it) {
-                res.alloc(macro_call.syntax());
-            }
-        });
-        res
-    }
-
-    pub fn ast_id<N: AstNode>(&self, item: &N) -> FileAstId<N> {
-        let ptr = SyntaxNodePtr::new(item.syntax());
-        let raw = match self.arena.iter().find(|(_id, i)| **i == ptr) {
-            Some((it, _)) => it,
-            None => panic!(
-                "Can't find {:?} in AstIdMap:\n{:?}",
-                item.syntax(),
-                self.arena.iter().map(|(_id, i)| i).collect::<Vec<_>>(),
-            ),
-        };
-
-        FileAstId { raw, _ty: PhantomData }
-    }
-
-    fn alloc(&mut self, item: &SyntaxNode) -> ErasedFileAstId {
-        self.arena.alloc(SyntaxNodePtr::new(item))
-    }
-}
-
-impl ops::Index<ErasedFileAstId> for AstIdMap {
-    type Output = SyntaxNodePtr;
-    fn index(&self, index: ErasedFileAstId) -> &SyntaxNodePtr {
-        &self.arena[index]
-    }
-}
-
-/// Walks the subtree in bfs order, calling `f` for each node.
-fn bfs(node: &SyntaxNode, mut f: impl FnMut(SyntaxNode)) {
-    let mut curr_layer = vec![node.clone()];
-    let mut next_layer = vec![];
-    while !curr_layer.is_empty() {
-        curr_layer.drain(..).for_each(|node| {
-            next_layer.extend(node.children());
-            f(node);
-        });
-        std::mem::swap(&mut curr_layer, &mut next_layer);
-    }
-}
-- 
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