Make DefIndex use newtype_index macro

src/Cargo.lock

@@ -1834,6 +1834,7 @@ dependencies = [
  "arena 0.0.0",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
+ "rustc_data_structures 0.0.0",
  "rustc_errors 0.0.0",
  "syntax 0.0.0",
  "syntax_pos 0.0.0",

src/librustc/hir/def_id.rs

@@ -86,20 +86,17 @@ impl serialize::UseSpecializedDecodable for CrateNum {
 ///
 /// Since the DefIndex is mostly treated as an opaque ID, you probably
 /// don't have to care about these ranges.
-#[derive(Clone, Eq, Ord, PartialOrd, PartialEq, RustcEncodable,
-           RustcDecodable, Hash, Copy)]
-pub struct DefIndex(u32);
+newtype_index!(DefIndex
+    {
+        DEBUG_FORMAT = custom,
 
-impl Idx for DefIndex {
-    fn new(value: usize) -> Self {
-        assert!(value < (u32::MAX) as usize);
-        DefIndex(value as u32)
-    }
+        /// The start of the "high" range of DefIndexes.
+        const DEF_INDEX_HI_START = 1 << 31,
 
-    fn index(self) -> usize {
-        self.0 as usize
-    }
-}
+        /// The crate root is always assigned index 0 by the AST Map code,
+        /// thanks to `NodeCollector::new`.
+        const CRATE_DEF_INDEX = 0,
+    });
 
 impl fmt::Debug for DefIndex {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
@@ -111,12 +108,6 @@ impl fmt::Debug for DefIndex {
 }
 
 impl DefIndex {
-    #[inline]
-    pub fn new(x: usize) -> DefIndex {
-        assert!(x < (u32::MAX as usize));
-        DefIndex(x as u32)
-    }
-
     #[inline]
     pub fn from_u32(x: u32) -> DefIndex {
         DefIndex(x)
@@ -155,13 +146,6 @@ impl DefIndex {
     }
 }
 
-/// The start of the "high" range of DefIndexes.
-const DEF_INDEX_HI_START: DefIndex = DefIndex(1 << 31);
-
-/// The crate root is always assigned index 0 by the AST Map code,
-/// thanks to `NodeCollector::new`.
-pub const CRATE_DEF_INDEX: DefIndex = DefIndex(0);
-
 #[derive(Copy, Clone, Eq, PartialEq, Hash)]
 pub enum DefIndexAddressSpace {
     Low = 0,

src/librustc/hir/map/definitions.rs

@@ -19,7 +19,7 @@ use hir::def_id::{CrateNum, DefId, DefIndex, LOCAL_CRATE, DefIndexAddressSpace,
                   CRATE_DEF_INDEX};
 use ich::Fingerprint;
 use rustc_data_structures::fx::FxHashMap;
-use rustc_data_structures::indexed_vec::IndexVec;
+use rustc_data_structures::indexed_vec::{IndexVec, Idx};
 use rustc_data_structures::stable_hasher::StableHasher;
 use serialize::{Encodable, Decodable, Encoder, Decoder};
 use session::CrateDisambiguator;

src/librustc/infer/region_inference/graphviz.rs

@@ -19,6 +19,7 @@
 use graphviz as dot;
 
 use hir::def_id::DefIndex;
+use rustc_data_structures::indexed_vec::Idx;
 use ty;
 use middle::free_region::RegionRelations;
 use middle::region;

src/librustc_metadata/decoder.rs

@@ -41,6 +41,7 @@ use std::str;
 use std::u32;
 
 use rustc_serialize::{Decodable, Decoder, SpecializedDecoder, opaque};
+use rustc_data_structures::indexed_vec::Idx;
 use syntax::attr;
 use syntax::ast::{self, Ident};
 use syntax::codemap;

src/librustc_resolve/Cargo.toml

@@ -16,3 +16,4 @@ rustc = { path = "../librustc" }
 arena = { path = "../libarena" }
 rustc_errors = { path = "../librustc_errors" }
 syntax_pos = { path = "../libsyntax_pos" }
+rustc_data_structures = { path = "../librustc_data_structures" }

src/librustc_resolve/lib.rs

@@ -24,6 +24,7 @@ extern crate rustc_errors as errors;
 extern crate arena;
 #[macro_use]
 extern crate rustc;
+extern crate rustc_data_structures;
 
 use self::Namespace::*;
 use self::TypeParameters::*;

src/librustc_resolve/macros.rs

@@ -13,6 +13,7 @@ use {Module, ModuleKind, NameBinding, NameBindingKind, PathResult};
 use Namespace::{self, MacroNS};
 use build_reduced_graph::BuildReducedGraphVisitor;
 use resolve_imports::ImportResolver;
+use rustc_data_structures::indexed_vec::Idx;
 use rustc::hir::def_id::{DefId, BUILTIN_MACROS_CRATE, CRATE_DEF_INDEX, DefIndex};
 use rustc::hir::def::{Def, Export};
 use rustc::hir::map::{self, DefCollector};