auto merge of #11965 : alexcrichton/rust/issue-7385, r=alexcrichton

I've verified that it works on osx x86_64

Closes #7385

Rolled up PRs:

Closes #11898
Closes #11934
Closes #11942
Closes #11952 
Closes #11960 
Closes #11966
Closes #11953 

Closed issues:

Closes #4063 
Closes #7911

Author: bors

README.md

@@ -71,9 +71,9 @@ fetch snapshots, and an OS that can execute the available snapshot binaries.
 
 Snapshot binaries are currently built and tested on several platforms:
 
-* Windows (7, Server 2008 R2), x86 only
-* Linux (various distributions), x86 and x86-64
-* OSX 10.6 ("Snow Leopard") or greater, x86 and x86-64
+* Windows (7, 8, Server 2008 R2), x86 only
+* Linux (2.6.18 or later, various distributions), x86 and x86-64
+* OSX 10.7 (Lion) or greater, x86 and x86-64
 
 You may find that other platforms work, but these are our officially
 supported build environments that are most likely to work.

doc/tutorial.md

@@ -72,9 +72,9 @@ from the Internet on our supported platforms.
 
 Snapshot binaries are currently built and tested on several platforms:
 
-* Windows (7, Server 2008 R2), x86 only
-* Linux (various distributions), x86 and x86-64
-* OSX 10.6 ("Snow Leopard") or greater, x86 and x86-64
+* Windows (7, 8, Server 2008 R2), x86 only
+* Linux (2.6.18 or later, various distributions), x86 and x86-64
+* OSX 10.7 (Lion) or greater, x86 and x86-64
 
 You may find that other platforms work, but these are our "tier 1"
 supported build environments that are most likely to work.

src/libextra/hex.rs

@@ -1,4 +1,4 @@
-// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -60,7 +60,7 @@ pub trait FromHex {
 pub enum FromHexError {
     /// The input contained a character not part of the hex format
     InvalidHexCharacter(char, uint),
-    /// The input had a invalid length
+    /// The input had an invalid length
     InvalidHexLength,
 }
 

src/libextra/num/bigint.rs

@@ -1292,7 +1292,7 @@ impl ToStrRadix for BigInt {
 }
 
 impl FromStrRadix for BigInt {
-    /// Creates and initializes an BigInt.
+    /// Creates and initializes a BigInt.
     #[inline]
     fn from_str_radix(s: &str, radix: uint) -> Option<BigInt> {
         BigInt::parse_bytes(s.as_bytes(), radix)
@@ -1385,7 +1385,7 @@ impl<R: Rng> RandBigInt for R {
 }
 
 impl BigInt {
-    /// Creates and initializes an BigInt.
+    /// Creates and initializes a BigInt.
     #[inline]
     pub fn new(sign: Sign, v: ~[BigDigit]) -> BigInt {
         BigInt::from_biguint(sign, BigUint::new(v))

src/librustc/middle/kind.rs

@@ -485,7 +485,7 @@ pub fn check_durable(tcx: ty::ctxt, ty: ty::t, sp: Span) -> bool {
     }
 }
 
-/// This is rather subtle.  When we are casting a value to a instantiated
+/// This is rather subtle.  When we are casting a value to an instantiated
 /// trait like `a as trait<'r>`, regionck already ensures that any references
 /// that appear in the type of `a` are bounded by `'r` (ed.: rem
 /// FIXME(#5723)).  However, it is possible that there are *type parameters*
@@ -516,7 +516,7 @@ pub fn check_cast_for_escaping_regions(
     target_ty: ty::t,
     source_span: Span)
 {
-    // Determine what type we are casting to; if it is not an trait, then no
+    // Determine what type we are casting to; if it is not a trait, then no
     // worries.
     match ty::get(target_ty).sty {
         ty::ty_trait(..) => {}

src/librustc/middle/lang_items.rs

@@ -33,41 +33,28 @@ use std::hashmap::HashMap;
 use std::iter::Enumerate;
 use std::vec;
 
-
-// Get the last "argument" (has to be done recursively to avoid phoney local ambiguity error)
-macro_rules! last {
-    ( $first:expr, $( $remainder:expr, )+ ) => ( last!( $( $remainder, )+ ) );
-    ( $first:expr, ) => ( $first )
-}
-
 // The actual lang items defined come at the end of this file in one handy table.
 // So you probably just want to nip down to the end.
 macro_rules! lets_do_this {
-    // secondary rule to allow us to use `$num` as both an expression
-    // and a pattern.
     (
-        $( $num:tt, $variant:ident, $name:expr, $method:ident; )*
-    ) => {
-        lets_do_this!(count = 1 + last!($($num,)*),
-                      $($num, $variant, $name, $method; )*)
-    };
-
-    (
-        count = $num_lang_items:expr, $( $num:pat, $variant:ident, $name:expr, $method:ident; )*
+        $( $variant:ident, $name:expr, $method:ident; )*
     ) => {
 
+#[deriving(FromPrimitive)]
 pub enum LangItem {
     $($variant),*
 }
 
 pub struct LanguageItems {
-    items: [Option<ast::DefId>, ..$num_lang_items]
+    items: ~[Option<ast::DefId>],
 }
 
 impl LanguageItems {
     pub fn new() -> LanguageItems {
+        fn foo(_: LangItem) -> Option<ast::DefId> { None }
+
         LanguageItems {
-            items: [ None, ..$num_lang_items ]
+            items: ~[$(foo($variant)),*]
         }
     }
 
@@ -76,9 +63,10 @@ impl LanguageItems {
     }
 
     pub fn item_name(index: uint) -> &'static str {
-        match index {
-            $( $num => $name, )*
-            _ => "???"
+        let item: Option<LangItem> = FromPrimitive::from_uint(index);
+        match item {
+            $( Some($variant) => $name, )*
+            None => "???"
         }
     }
 
@@ -208,82 +196,81 @@ pub fn extract(attrs: &[ast::Attribute]) -> Option<@str> {
 }
 
 pub fn collect_language_items(crate: &ast::Crate,
-                              session: Session)
-                           -> LanguageItems {
+                              session: Session) -> @LanguageItems {
     let mut collector = LanguageItemCollector::new(session);
     collector.collect(crate);
     let LanguageItemCollector { items, .. } = collector;
     session.abort_if_errors();
-    items
+    @items
 }
 
 // End of the macro
     }
 }
 
 lets_do_this! {
-//  ID, Variant name,                    Name,                      Method name;
-    0,  FreezeTraitLangItem,             "freeze",                  freeze_trait;
-    1,  SendTraitLangItem,               "send",                    send_trait;
-    2,  SizedTraitLangItem,              "sized",                   sized_trait;
-    3,  PodTraitLangItem,                "pod",                     pod_trait;
-
-    4,  DropTraitLangItem,               "drop",                    drop_trait;
-
-    5,  AddTraitLangItem,                "add",                     add_trait;
-    6,  SubTraitLangItem,                "sub",                     sub_trait;
-    7,  MulTraitLangItem,                "mul",                     mul_trait;
-    8,  DivTraitLangItem,                "div",                     div_trait;
-    9,  RemTraitLangItem,                "rem",                     rem_trait;
-    10, NegTraitLangItem,                "neg",                     neg_trait;
-    11, NotTraitLangItem,                "not",                     not_trait;
-    12, BitXorTraitLangItem,             "bitxor",                  bitxor_trait;
-    13, BitAndTraitLangItem,             "bitand",                  bitand_trait;
-    14, BitOrTraitLangItem,              "bitor",                   bitor_trait;
-    15, ShlTraitLangItem,                "shl",                     shl_trait;
-    16, ShrTraitLangItem,                "shr",                     shr_trait;
-    17, IndexTraitLangItem,              "index",                   index_trait;
-
-    18, EqTraitLangItem,                 "eq",                      eq_trait;
-    19, OrdTraitLangItem,                "ord",                     ord_trait;
-
-    20, StrEqFnLangItem,                 "str_eq",                  str_eq_fn;
-    21, UniqStrEqFnLangItem,             "uniq_str_eq",             uniq_str_eq_fn;
-    22, FailFnLangItem,                  "fail_",                   fail_fn;
-    23, FailBoundsCheckFnLangItem,       "fail_bounds_check",       fail_bounds_check_fn;
-    24, ExchangeMallocFnLangItem,        "exchange_malloc",         exchange_malloc_fn;
-    25, ClosureExchangeMallocFnLangItem, "closure_exchange_malloc", closure_exchange_malloc_fn;
-    26, ExchangeFreeFnLangItem,          "exchange_free",           exchange_free_fn;
-    27, MallocFnLangItem,                "malloc",                  malloc_fn;
-    28, FreeFnLangItem,                  "free",                    free_fn;
-    29, StrDupUniqFnLangItem,            "strdup_uniq",             strdup_uniq_fn;
-
-    30, StartFnLangItem,                 "start",                   start_fn;
-
-    31, TyDescStructLangItem,            "ty_desc",                 ty_desc;
-    32, TyVisitorTraitLangItem,          "ty_visitor",              ty_visitor;
-    33, OpaqueStructLangItem,            "opaque",                  opaque;
-
-    34, EventLoopFactoryLangItem,        "event_loop_factory",      event_loop_factory;
-
-    35, TypeIdLangItem,                  "type_id",                 type_id;
-
-    36, EhPersonalityLangItem,           "eh_personality",          eh_personality_fn;
-
-    37, ManagedHeapLangItem,             "managed_heap",            managed_heap;
-    38, ExchangeHeapLangItem,            "exchange_heap",           exchange_heap;
-    39, GcLangItem,                      "gc",                      gc;
-
-    40, CovariantTypeItem,               "covariant_type",          covariant_type;
-    41, ContravariantTypeItem,           "contravariant_type",      contravariant_type;
-    42, InvariantTypeItem,               "invariant_type",          invariant_type;
-
-    43, CovariantLifetimeItem,           "covariant_lifetime",      covariant_lifetime;
-    44, ContravariantLifetimeItem,       "contravariant_lifetime",  contravariant_lifetime;
-    45, InvariantLifetimeItem,           "invariant_lifetime",      invariant_lifetime;
-
-    46, NoFreezeItem,                    "no_freeze_bound",         no_freeze_bound;
-    47, NoSendItem,                      "no_send_bound",           no_send_bound;
-    48, NoPodItem,                       "no_pod_bound",            no_pod_bound;
-    49, ManagedItem,                     "managed_bound",           managed_bound;
+//  Variant name,                    Name,                      Method name;
+    FreezeTraitLangItem,             "freeze",                  freeze_trait;
+    SendTraitLangItem,               "send",                    send_trait;
+    SizedTraitLangItem,              "sized",                   sized_trait;
+    PodTraitLangItem,                "pod",                     pod_trait;
+
+    DropTraitLangItem,               "drop",                    drop_trait;
+
+    AddTraitLangItem,                "add",                     add_trait;
+    SubTraitLangItem,                "sub",                     sub_trait;
+    MulTraitLangItem,                "mul",                     mul_trait;
+    DivTraitLangItem,                "div",                     div_trait;
+    RemTraitLangItem,                "rem",                     rem_trait;
+    NegTraitLangItem,                "neg",                     neg_trait;
+    NotTraitLangItem,                "not",                     not_trait;
+    BitXorTraitLangItem,             "bitxor",                  bitxor_trait;
+    BitAndTraitLangItem,             "bitand",                  bitand_trait;
+    BitOrTraitLangItem,              "bitor",                   bitor_trait;
+    ShlTraitLangItem,                "shl",                     shl_trait;
+    ShrTraitLangItem,                "shr",                     shr_trait;
+    IndexTraitLangItem,              "index",                   index_trait;
+
+    EqTraitLangItem,                 "eq",                      eq_trait;
+    OrdTraitLangItem,                "ord",                     ord_trait;
+
+    StrEqFnLangItem,                 "str_eq",                  str_eq_fn;
+    UniqStrEqFnLangItem,             "uniq_str_eq",             uniq_str_eq_fn;
+    FailFnLangItem,                  "fail_",                   fail_fn;
+    FailBoundsCheckFnLangItem,       "fail_bounds_check",       fail_bounds_check_fn;
+    ExchangeMallocFnLangItem,        "exchange_malloc",         exchange_malloc_fn;
+    ClosureExchangeMallocFnLangItem, "closure_exchange_malloc", closure_exchange_malloc_fn;
+    ExchangeFreeFnLangItem,          "exchange_free",           exchange_free_fn;
+    MallocFnLangItem,                "malloc",                  malloc_fn;
+    FreeFnLangItem,                  "free",                    free_fn;
+    StrDupUniqFnLangItem,            "strdup_uniq",             strdup_uniq_fn;
+
+    StartFnLangItem,                 "start",                   start_fn;
+
+    TyDescStructLangItem,            "ty_desc",                 ty_desc;
+    TyVisitorTraitLangItem,          "ty_visitor",              ty_visitor;
+    OpaqueStructLangItem,            "opaque",                  opaque;
+
+    EventLoopFactoryLangItem,        "event_loop_factory",      event_loop_factory;
+
+    TypeIdLangItem,                  "type_id",                 type_id;
+
+    EhPersonalityLangItem,           "eh_personality",          eh_personality_fn;
+
+    ManagedHeapLangItem,             "managed_heap",            managed_heap;
+    ExchangeHeapLangItem,            "exchange_heap",           exchange_heap;
+    GcLangItem,                      "gc",                      gc;
+
+    CovariantTypeItem,               "covariant_type",          covariant_type;
+    ContravariantTypeItem,           "contravariant_type",      contravariant_type;
+    InvariantTypeItem,               "invariant_type",          invariant_type;
+
+    CovariantLifetimeItem,           "covariant_lifetime",      covariant_lifetime;
+    ContravariantLifetimeItem,       "contravariant_lifetime",  contravariant_lifetime;
+    InvariantLifetimeItem,           "invariant_lifetime",      invariant_lifetime;
+
+    NoFreezeItem,                    "no_freeze_bound",         no_freeze_bound;
+    NoSendItem,                      "no_send_bound",           no_send_bound;
+    NoPodItem,                       "no_pod_bound",            no_pod_bound;
+    ManagedItem,                     "managed_bound",           managed_bound;
 }

src/librustc/middle/lint.rs

@@ -371,7 +371,7 @@ static lint_table: &'static [(&'static str, LintSpec)] = &[
     ("unused_must_use",
     LintSpec {
         lint: UnusedMustUse,
-        desc: "unused result of an type flagged as #[must_use]",
+        desc: "unused result of a type flagged as #[must_use]",
         default: warn,
     }),
 

src/librustc/middle/resolve.rs

@@ -765,7 +765,7 @@ fn namespace_error_to_str(ns: NamespaceError) -> &'static str {
 }
 
 fn Resolver(session: Session,
-            lang_items: LanguageItems,
+            lang_items: @LanguageItems,
             crate_span: Span) -> Resolver {
     let graph_root = @NameBindings();
 
@@ -823,7 +823,7 @@ fn Resolver(session: Session,
 /// The main resolver class.
 struct Resolver {
     session: @Session,
-    lang_items: LanguageItems,
+    lang_items: @LanguageItems,
 
     intr: @IdentInterner,
 
@@ -5550,7 +5550,7 @@ pub struct CrateMap {
 
 /// Entry point to crate resolution.
 pub fn resolve_crate(session: Session,
-                     lang_items: LanguageItems,
+                     lang_items: @LanguageItems,
                      crate: &Crate)
                   -> CrateMap {
     let mut resolver = Resolver(session, lang_items, crate.span);

src/librustc/middle/trans/_match.rs

@@ -1,4 +1,4 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -244,7 +244,7 @@ pub enum VecLenOpt {
     vec_len_ge(/* length of prefix */uint)
 }
 
-// An option identifying a branch (either a literal, a enum variant or a
+// An option identifying a branch (either a literal, an enum variant or a
 // range)
 enum Opt {
     lit(Lit),

src/librustc/middle/ty.rs

@@ -1,4 +1,4 @@
-// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -299,7 +299,7 @@ pub struct ctxt_ {
     ty_param_defs: RefCell<HashMap<ast::NodeId, TypeParameterDef>>,
     adjustments: RefCell<HashMap<ast::NodeId, @AutoAdjustment>>,
     normalized_cache: RefCell<HashMap<t, t>>,
-    lang_items: middle::lang_items::LanguageItems,
+    lang_items: @middle::lang_items::LanguageItems,
     // A mapping of fake provided method def_ids to the default implementation
     provided_method_sources: RefCell<HashMap<ast::DefId, ast::DefId>>,
     supertraits: RefCell<HashMap<ast::DefId, @~[@TraitRef]>>,
@@ -947,7 +947,7 @@ pub fn mk_ctxt(s: session::Session,
                amap: ast_map::Map,
                freevars: freevars::freevar_map,
                region_maps: middle::region::RegionMaps,
-               lang_items: middle::lang_items::LanguageItems)
+               lang_items: @middle::lang_items::LanguageItems)
             -> ctxt {
     @ctxt_ {
         named_region_map: named_region_map,
@@ -2591,7 +2591,7 @@ pub fn type_is_sized(cx: ctxt, ty: ty::t) -> bool {
     }
 }
 
-// Whether a type is enum like, that is a enum type with only nullary
+// Whether a type is enum like, that is an enum type with only nullary
 // constructors
 pub fn type_is_c_like_enum(cx: ctxt, ty: t) -> bool {
     match get(ty).sty {