From 88189c428242d2d65b749d0980eb447e72766e77 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Tue, 9 Apr 2019 22:52:06 +0300
Subject: drop old interning infra

---
 crates/ra_db/src/lib.rs    |   6 +--
 crates/ra_db/src/loc2id.rs | 103 ---------------------------------------------
 2 files changed, 1 insertion(+), 108 deletions(-)
 delete mode 100644 crates/ra_db/src/loc2id.rs

diff --git a/crates/ra_db/src/lib.rs b/crates/ra_db/src/lib.rs
index f3389c91f..1cd400752 100644
--- a/crates/ra_db/src/lib.rs
+++ b/crates/ra_db/src/lib.rs
@@ -1,11 +1,8 @@
 //! ra_db defines basic database traits. The concrete DB is defined by ra_ide_api.
 mod cancellation;
 mod input;
-mod loc2id;
 
-use std::{
-    panic, sync::Arc,
-};
+use std::{panic, sync::Arc};
 
 use ra_syntax::{TextUnit, TextRange, SourceFile, TreeArc};
 use relative_path::RelativePathBuf;
@@ -16,7 +13,6 @@ pub use crate::{
     input::{
         FileId, CrateId, SourceRoot, SourceRootId, CrateGraph, Dependency, Edition,
     },
-    loc2id::LocationInterner,
 };
 
 pub trait CheckCanceled: panic::RefUnwindSafe {
diff --git a/crates/ra_db/src/loc2id.rs b/crates/ra_db/src/loc2id.rs
deleted file mode 100644
index eae64a4eb..000000000
--- a/crates/ra_db/src/loc2id.rs
+++ /dev/null
@@ -1,103 +0,0 @@
-use std::{panic, hash::Hash};
-
-use parking_lot::Mutex;
-use rustc_hash::FxHashMap;
-use ra_arena::{Arena, ArenaId};
-
-/// There are two principle ways to refer to things:
-///   - by their location (module in foo/bar/baz.rs at line 42)
-///   - by their numeric id (module `ModuleId(42)`)
-///
-/// The first one is more powerful (you can actually find the thing in question
-/// by id), but the second one is so much more compact.
-///
-/// `Loc2IdMap` allows us to have a cake an eat it as well: by maintaining a
-/// bidirectional mapping between positional and numeric ids, we can use compact
-/// representation which still allows us to get the actual item.
-#[derive(Debug)]
-struct Loc2IdMap<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    id2loc: Arena<ID, LOC>,
-    loc2id: FxHashMap<LOC, ID>,
-}
-
-impl<LOC, ID> Default for Loc2IdMap<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    fn default() -> Self {
-        Loc2IdMap { id2loc: Arena::default(), loc2id: FxHashMap::default() }
-    }
-}
-
-impl<LOC, ID> Loc2IdMap<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    pub fn len(&self) -> usize {
-        self.id2loc.len()
-    }
-
-    pub fn loc2id(&mut self, loc: &LOC) -> ID {
-        match self.loc2id.get(loc) {
-            Some(id) => return id.clone(),
-            None => (),
-        }
-        let id = self.id2loc.alloc(loc.clone());
-        self.loc2id.insert(loc.clone(), id.clone());
-        id
-    }
-
-    pub fn id2loc(&self, id: ID) -> LOC {
-        self.id2loc[id].clone()
-    }
-}
-
-#[derive(Debug)]
-pub struct LocationInterner<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    map: Mutex<Loc2IdMap<LOC, ID>>,
-}
-
-impl<LOC, ID> panic::RefUnwindSafe for LocationInterner<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-    ID: panic::RefUnwindSafe,
-    LOC: panic::RefUnwindSafe,
-{
-}
-
-impl<LOC, ID> Default for LocationInterner<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    fn default() -> Self {
-        LocationInterner { map: Default::default() }
-    }
-}
-
-impl<LOC, ID> LocationInterner<LOC, ID>
-where
-    ID: ArenaId + Clone,
-    LOC: Clone + Eq + Hash,
-{
-    pub fn len(&self) -> usize {
-        self.map.lock().len()
-    }
-    pub fn loc2id(&self, loc: &LOC) -> ID {
-        self.map.lock().loc2id(loc)
-    }
-    pub fn id2loc(&self, id: ID) -> LOC {
-        self.map.lock().id2loc(id)
-    }
-}
-- 
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