auto merge of rust-lang#8455 : nikomatsakis/rust/issue-5762-objects-d…

…ralston-d, r=graydon

Fix rust-lang#5762 and various other aspects of object invocation.

r? @graydon

src/librustc/back/abi.rs

@@ -46,7 +46,8 @@ pub static tydesc_field_take_glue: uint = 2u;
 pub static tydesc_field_drop_glue: uint = 3u;
 pub static tydesc_field_free_glue: uint = 4u;
 pub static tydesc_field_visit_glue: uint = 5u;
-pub static n_tydesc_fields: uint = 6u;
+pub static tydesc_field_borrow_offset: uint = 6u;
+pub static n_tydesc_fields: uint = 7u;
 
 // The two halves of a closure: code and environment.
 pub static fn_field_code: uint = 0u;

src/librustc/driver/driver.rs

@@ -785,7 +785,7 @@ pub fn build_session(sopts: @session::options,
 pub fn build_session_(sopts: @session::options,
                       cm: @codemap::CodeMap,
                       demitter: diagnostic::Emitter,
-                      span_diagnostic_handler: @diagnostic::span_handler)
+                      span_diagnostic_handler: @mut diagnostic::span_handler)
                    -> Session {
     let target_cfg = build_target_config(sopts, demitter);
     let p_s = parse::new_parse_sess_special_handler(span_diagnostic_handler,

src/librustc/driver/session.rs

@@ -192,7 +192,7 @@ pub struct Session_ {
     // For a library crate, this is always none
     entry_fn: @mut Option<(NodeId, codemap::span)>,
     entry_type: @mut Option<EntryFnType>,
-    span_diagnostic: @diagnostic::span_handler,
+    span_diagnostic: @mut diagnostic::span_handler,
     filesearch: @filesearch::FileSearch,
     building_library: @mut bool,
     working_dir: Path,
@@ -261,7 +261,7 @@ impl Session_ {
     pub fn next_node_id(@self) -> ast::NodeId {
         return syntax::parse::next_node_id(self.parse_sess);
     }
-    pub fn diagnostic(@self) -> @diagnostic::span_handler {
+    pub fn diagnostic(@self) -> @mut diagnostic::span_handler {
         self.span_diagnostic
     }
     pub fn debugging_opt(@self, opt: uint) -> bool {

src/librustc/metadata/creader.rs

@@ -29,7 +29,7 @@ use syntax::oldvisit;
 
 // Traverses an AST, reading all the information about use'd crates and extern
 // libraries necessary for later resolving, typechecking, linking, etc.
-pub fn read_crates(diag: @span_handler,
+pub fn read_crates(diag: @mut span_handler,
                    crate: &ast::Crate,
                    cstore: @mut cstore::CStore,
                    filesearch: @FileSearch,
@@ -74,7 +74,7 @@ fn dump_crates(crate_cache: &[cache_entry]) {
 }
 
 fn warn_if_multiple_versions(e: @mut Env,
-                             diag: @span_handler,
+                             diag: @mut span_handler,
                              crate_cache: &[cache_entry]) {
     use std::either::*;
 
@@ -113,7 +113,7 @@ fn warn_if_multiple_versions(e: @mut Env,
 }
 
 struct Env {
-    diag: @span_handler,
+    diag: @mut span_handler,
     filesearch: @FileSearch,
     cstore: @mut cstore::CStore,
     os: loader::os,

src/librustc/metadata/encoder.rs

@@ -55,7 +55,7 @@ pub type encode_inlined_item<'self> = &'self fn(ecx: &EncodeContext,
                                    ii: ast::inlined_item);
 
 pub struct EncodeParams<'self> {
-    diag: @span_handler,
+    diag: @mut span_handler,
     tcx: ty::ctxt,
     reexports2: middle::resolve::ExportMap2,
     item_symbols: &'self HashMap<ast::NodeId, ~str>,
@@ -82,7 +82,7 @@ struct Stats {
 }
 
 pub struct EncodeContext<'self> {
-    diag: @span_handler,
+    diag: @mut span_handler,
     tcx: ty::ctxt,
     stats: @mut Stats,
     reexports2: middle::resolve::ExportMap2,

src/librustc/metadata/loader.rs

@@ -43,7 +43,7 @@ pub enum os {
 }
 
 pub struct Context {
-    diag: @span_handler,
+    diag: @mut span_handler,
     filesearch: @FileSearch,
     span: span,
     ident: @str,
@@ -163,7 +163,7 @@ pub fn package_id_from_metas(metas: &[@ast::MetaItem]) -> Option<@str> {
 }
 
 pub fn note_linkage_attrs(intr: @ident_interner,
-                          diag: @span_handler,
+                          diag: @mut span_handler,
                           attrs: ~[ast::Attribute]) {
     let r = attr::find_linkage_metas(attrs);
     for mi in r.iter() {

src/librustc/metadata/tyencode.rs

@@ -25,7 +25,7 @@ use syntax::diagnostic::span_handler;
 use syntax::print::pprust::*;
 
 pub struct ctxt {
-    diag: @span_handler,
+    diag: @mut span_handler,
     // Def -> str Callback:
     ds: @fn(def_id) -> ~str,
     // The type context.

src/librustc/middle/astencode.rs

@@ -586,8 +586,8 @@ impl tr for method_origin {
                 }
             )
           }
-          typeck::method_trait(did, m, vstore) => {
-              typeck::method_trait(did.tr(xcx), m, vstore)
+          typeck::method_trait(did, m) => {
+              typeck::method_trait(did.tr(xcx), m)
           }
         }
     }

src/librustc/middle/borrowck/check_loans.rs

@@ -362,7 +362,7 @@ impl<'self> CheckLoanCtxt<'self> {
                     }
 
                     mc::cat_discr(b, _) |
-                    mc::cat_deref(b, _, mc::uniq_ptr(*)) => {
+                    mc::cat_deref(b, _, mc::uniq_ptr) => {
                         assert_eq!(cmt.mutbl, mc::McInherited);
                         cmt = b;
                     }

src/librustc/middle/borrowck/gather_loans/gather_moves.rs

@@ -173,7 +173,7 @@ fn check_is_legal_to_move_from(bccx: @BorrowckCtxt,
             }
         }
 
-        mc::cat_deref(b, _, mc::uniq_ptr(*)) |
+        mc::cat_deref(b, _, mc::uniq_ptr) |
         mc::cat_discr(b, _) => {
             check_is_legal_to_move_from(bccx, cmt0, b)
         }

src/librustc/middle/borrowck/gather_loans/lifetime.rs

@@ -74,7 +74,7 @@ impl GuaranteeLifetimeContext {
             mc::cat_arg(*) |                           // L-Local
             mc::cat_self(*) |                          // L-Local
             mc::cat_deref(_, _, mc::region_ptr(*)) |   // L-Deref-Borrowed
-            mc::cat_deref(_, _, mc::unsafe_ptr) => {
+            mc::cat_deref(_, _, mc::unsafe_ptr(*)) => {
                 let scope = self.scope(cmt);
                 self.check_scope(scope)
             }
@@ -108,7 +108,7 @@ impl GuaranteeLifetimeContext {
             }
 
             mc::cat_downcast(base) |
-            mc::cat_deref(base, _, mc::uniq_ptr(*)) |  // L-Deref-Send
+            mc::cat_deref(base, _, mc::uniq_ptr) |     // L-Deref-Send
             mc::cat_interior(base, _) => {             // L-Field
                 self.check(base, discr_scope)
             }
@@ -347,7 +347,7 @@ impl GuaranteeLifetimeContext {
                 r
             }
             mc::cat_downcast(cmt) |
-            mc::cat_deref(cmt, _, mc::uniq_ptr(*)) |
+            mc::cat_deref(cmt, _, mc::uniq_ptr) |
             mc::cat_deref(cmt, _, mc::gc_ptr(*)) |
             mc::cat_interior(cmt, _) |
             mc::cat_stack_upvar(cmt) |

src/librustc/middle/borrowck/gather_loans/mod.rs

@@ -352,13 +352,21 @@ impl GatherLoanCtxt {
                                              r)
                     }
                     ty::AutoBorrowFn(r) => {
-                        let cmt_deref = mcx.cat_deref_fn(expr, cmt, 0);
+                        let cmt_deref = mcx.cat_deref_fn_or_obj(expr, cmt, 0);
                         self.guarantee_valid(expr.id,
                                              expr.span,
                                              cmt_deref,
                                              m_imm,
                                              r)
                     }
+                    ty::AutoBorrowObj(r, m) => {
+                        let cmt_deref = mcx.cat_deref_fn_or_obj(expr, cmt, 0);
+                        self.guarantee_valid(expr.id,
+                                             expr.span,
+                                             cmt_deref,
+                                             m,
+                                             r)
+                    }
                     ty::AutoUnsafe(_) => {}
                 }
             }

src/librustc/middle/borrowck/gather_loans/restrictions.rs

@@ -101,7 +101,7 @@ impl RestrictionsContext {
                 self.extend(result, cmt.mutbl, LpInterior(i), restrictions)
             }
 
-            mc::cat_deref(cmt_base, _, mc::uniq_ptr(*)) => {
+            mc::cat_deref(cmt_base, _, mc::uniq_ptr) => {
                 // R-Deref-Send-Pointer
                 //
                 // When we borrow the interior of an owned pointer, we
@@ -194,7 +194,7 @@ impl RestrictionsContext {
                 }
             }
 
-            mc::cat_deref(_, _, mc::unsafe_ptr) => {
+            mc::cat_deref(_, _, mc::unsafe_ptr(*)) => {
                 // We are very trusting when working with unsafe pointers.
                 Safe
             }

src/librustc/middle/lint.rs

@@ -301,7 +301,7 @@ enum AnyVisitor {
     // recursive call can use the original visitor's method, although the
     // recursing visitor supplied to the method is the item stopping visitor.
     OldVisitor(oldvisit::vt<@mut Context>, oldvisit::vt<@mut Context>),
-    NewVisitor(@visit::Visitor<()>),
+    NewVisitor(@mut visit::Visitor<()>),
 }
 
 struct Context {
@@ -465,7 +465,7 @@ impl Context {
         self.visitors.push(OldVisitor(v, item_stopping_visitor(v)));
     }
 
-    fn add_lint(&mut self, v: @visit::Visitor<()>) {
+    fn add_lint(&mut self, v: @mut visit::Visitor<()>) {
         self.visitors.push(NewVisitor(v));
     }
 
@@ -989,7 +989,7 @@ fn lint_unused_mut() -> oldvisit::vt<@mut Context> {
     })
 }
 
-fn lint_session(cx: @mut Context) -> @visit::Visitor<()> {
+fn lint_session(cx: @mut Context) -> @mut visit::Visitor<()> {
     ast_util::id_visitor(|id| {
         match cx.tcx.sess.lints.pop(&id) {
             None => {},