diff --git a/src/librustc/metadata/common.rs b/src/librustc/metadata/common.rs
index d2b71447f47..9426cd6041d 100644
--- a/src/librustc/metadata/common.rs
+++ b/src/librustc/metadata/common.rs
@@ -100,7 +100,7 @@ pub static tag_mod_impl_trait: uint = 0x47u;
   different tags.
  */
 pub static tag_item_impl_method: uint = 0x48u;
-pub static tag_item_trait_method_self_ty: uint = 0x4b;
+pub static tag_item_trait_method_explicit_self: uint = 0x4b;
 pub static tag_item_trait_method_self_ty_region: uint = 0x4c;
 
 
diff --git a/src/librustc/metadata/csearch.rs b/src/librustc/metadata/csearch.rs
index d8117a87480..e4c676e286f 100644
--- a/src/librustc/metadata/csearch.rs
+++ b/src/librustc/metadata/csearch.rs
@@ -135,11 +135,12 @@ pub fn get_method(tcx: ty::ctxt,
     decoder::get_method(tcx.cstore.intr, cdata, def.node, tcx)
 }
 
-pub fn get_method_name_and_self_ty(cstore: @mut cstore::CStore,
-                                   def: ast::def_id) -> (ast::ident, ast::self_ty_)
+pub fn get_method_name_and_explicit_self(cstore: @mut cstore::CStore,
+                                         def: ast::def_id)
+                                     -> (ast::ident, ast::explicit_self_)
 {
     let cdata = cstore::get_crate_data(cstore, def.crate);
-    decoder::get_method_name_and_self_ty(cstore.intr, cdata, def.node)
+    decoder::get_method_name_and_explicit_self(cstore.intr, cdata, def.node)
 }
 
 pub fn get_trait_method_def_ids(cstore: @mut cstore::CStore,
diff --git a/src/librustc/metadata/decoder.rs b/src/librustc/metadata/decoder.rs
index f2d04aca333..7febe9b24f8 100644
--- a/src/librustc/metadata/decoder.rs
+++ b/src/librustc/metadata/decoder.rs
@@ -670,7 +670,7 @@ pub fn get_enum_variants(intr: @ident_interner, cdata: cmd, id: ast::node_id,
     return infos;
 }
 
-fn get_self_ty(item: ebml::Doc) -> ast::self_ty_ {
+fn get_explicit_self(item: ebml::Doc) -> ast::explicit_self_ {
     fn get_mutability(ch: u8) -> ast::mutability {
         match ch as char {
             'i' => { ast::m_imm }
@@ -682,11 +682,11 @@ fn get_self_ty(item: ebml::Doc) -> ast::self_ty_ {
         }
     }
 
-    let self_type_doc = reader::get_doc(item, tag_item_trait_method_self_ty);
-    let string = reader::doc_as_str(self_type_doc);
+    let explicit_self_doc = reader::get_doc(item, tag_item_trait_method_explicit_self);
+    let string = reader::doc_as_str(explicit_self_doc);
 
-    let self_ty_kind = string[0];
-    match self_ty_kind as char {
+    let explicit_self_kind = string[0];
+    match explicit_self_kind as char {
         's' => { return ast::sty_static; }
         'v' => { return ast::sty_value; }
         '@' => { return ast::sty_box(get_mutability(string[1])); }
@@ -696,7 +696,7 @@ fn get_self_ty(item: ebml::Doc) -> ast::self_ty_ {
             return ast::sty_region(None, get_mutability(string[1]));
         }
         _ => {
-            fail!("unknown self type code: `%c`", self_ty_kind as char);
+            fail!("unknown self type code: `%c`", explicit_self_kind as char);
         }
     }
 }
@@ -707,12 +707,12 @@ fn item_impl_methods(intr: @ident_interner, cdata: cmd, item: ebml::Doc,
     for reader::tagged_docs(item, tag_item_impl_method) |doc| {
         let m_did = reader::with_doc_data(doc, |d| parse_def_id(d));
         let mth_item = lookup_item(m_did.node, cdata.data);
-        let self_ty = get_self_ty(mth_item);
+        let explicit_self = get_explicit_self(mth_item);
         rslt.push(@resolve::MethodInfo {
                     did: translate_def_id(cdata, m_did),
                     n_tps: item_ty_param_count(mth_item) - base_tps,
                     ident: item_name(intr, mth_item),
-                    self_type: self_ty});
+                    explicit_self: explicit_self});
     }
     rslt
 }
@@ -748,15 +748,15 @@ pub fn get_impls_for_mod(intr: @ident_interner,
     @result
 }
 
-pub fn get_method_name_and_self_ty(
+pub fn get_method_name_and_explicit_self(
     intr: @ident_interner,
     cdata: cmd,
-    id: ast::node_id) -> (ast::ident, ast::self_ty_)
+    id: ast::node_id) -> (ast::ident, ast::explicit_self_)
 {
     let method_doc = lookup_item(id, cdata.data);
     let name = item_name(intr, method_doc);
-    let self_ty = get_self_ty(method_doc);
-    (name, self_ty)
+    let explicit_self = get_explicit_self(method_doc);
+    (name, explicit_self)
 }
 
 pub fn get_method(intr: @ident_interner, cdata: cmd, id: ast::node_id,
@@ -770,7 +770,7 @@ pub fn get_method(intr: @ident_interner, cdata: cmd, id: ast::node_id,
     let transformed_self_ty = doc_transformed_self_ty(method_doc, tcx, cdata);
     let fty = doc_method_fty(method_doc, tcx, cdata);
     let vis = item_visibility(method_doc);
-    let self_ty = get_self_ty(method_doc);
+    let explicit_self = get_explicit_self(method_doc);
     ty::method {
         ident: name,
         generics: ty::Generics {
@@ -779,7 +779,7 @@ pub fn get_method(intr: @ident_interner, cdata: cmd, id: ast::node_id,
         },
         transformed_self_ty: transformed_self_ty,
         fty: fty,
-        self_ty: self_ty,
+        explicit_self: explicit_self,
         vis: vis,
         def_id: def_id
     }
@@ -823,7 +823,7 @@ pub fn get_provided_trait_methods(intr: @ident_interner, cdata: cmd,
         };
 
         let transformed_self_ty = doc_transformed_self_ty(mth, tcx, cdata);
-        let self_ty = get_self_ty(mth);
+        let explicit_self = get_explicit_self(mth);
         let ty_method = ty::method {
             ident: name,
             generics: ty::Generics {
@@ -832,7 +832,7 @@ pub fn get_provided_trait_methods(intr: @ident_interner, cdata: cmd,
             },
             transformed_self_ty: transformed_self_ty,
             fty: fty,
-            self_ty: self_ty,
+            explicit_self: explicit_self,
             vis: ast::public,
             def_id: did
         };
diff --git a/src/librustc/metadata/encoder.rs b/src/librustc/metadata/encoder.rs
index def24e5bc89..a9acf5d5015 100644
--- a/src/librustc/metadata/encoder.rs
+++ b/src/librustc/metadata/encoder.rs
@@ -389,7 +389,7 @@ fn encode_reexported_static_methods(ecx: @EncodeContext,
                 Some(&ast_map::node_item(_, path)) => {
                     if mod_path != *path {
                         for methods.each |&m| {
-                            if m.self_ty  == ast::sty_static {
+                            if m.explicit_self == ast::sty_static {
                                 encode_reexported_static_method(ecx,
                                                                 ebml_w,
                                                                 exp, m);
@@ -486,11 +486,11 @@ fn encode_visibility(ebml_w: &mut writer::Encoder, visibility: visibility) {
     ebml_w.end_tag();
 }
 
-fn encode_self_type(ebml_w: &mut writer::Encoder, self_type: ast::self_ty_) {
-    ebml_w.start_tag(tag_item_trait_method_self_ty);
+fn encode_explicit_self(ebml_w: &mut writer::Encoder, explicit_self: ast::explicit_self_) {
+    ebml_w.start_tag(tag_item_trait_method_explicit_self);
 
     // Encode the base self type.
-    match self_type {
+    match explicit_self {
         sty_static => {
             ebml_w.writer.write(&[ 's' as u8 ]);
         }
@@ -634,7 +634,7 @@ fn encode_method_ty_fields(ecx: @EncodeContext,
     encode_transformed_self_ty(ecx, ebml_w, method_ty.transformed_self_ty);
     encode_method_fty(ecx, ebml_w, &method_ty.fty);
     encode_visibility(ebml_w, method_ty.vis);
-    encode_self_type(ebml_w, method_ty.self_ty);
+    encode_explicit_self(ebml_w, method_ty.explicit_self);
 }
 
 fn encode_info_for_method(ecx: @EncodeContext,
@@ -655,7 +655,7 @@ fn encode_info_for_method(ecx: @EncodeContext,
     let method_ty: @ty::method = ty::method(ecx.tcx, method_def_id);
     encode_method_ty_fields(ecx, ebml_w, method_ty);
 
-    match m.self_ty.node {
+    match m.explicit_self.node {
         ast::sty_static => {
             encode_family(ebml_w, purity_static_method_family(m.purity));
         }
@@ -962,7 +962,7 @@ fn encode_info_for_item(ecx: @EncodeContext,
             trait_path.push(ast_map::path_name(item.ident));
             encode_path(ecx, ebml_w, trait_path, ast_map::path_name(method_ty.ident));
 
-            match method_ty.self_ty {
+            match method_ty.explicit_self {
                 sty_static => {
                     encode_family(ebml_w,
                                   purity_static_method_family(
@@ -991,7 +991,7 @@ fn encode_info_for_item(ecx: @EncodeContext,
                     // This is obviously a bogus assert but I don't think this
                     // ever worked before anyhow...near as I can tell, before
                     // we would emit two items.
-                    if method_ty.self_ty == sty_static {
+                    if method_ty.explicit_self == sty_static {
                         tcx.sess.span_unimpl(
                             item.span,
                             fmt!("Method %s is both provided and static",
diff --git a/src/librustc/middle/astencode.rs b/src/librustc/middle/astencode.rs
index c0d1b3a7507..2996c4c8476 100644
--- a/src/librustc/middle/astencode.rs
+++ b/src/librustc/middle/astencode.rs
@@ -552,8 +552,8 @@ impl read_method_map_entry_helper for reader::Decoder {
                 explicit_self: this.read_struct_field("explicit_self",
                                                       2,
                                                       |this| {
-                    let self_type: ast::self_ty_ = Decodable::decode(this);
-                    self_type
+                    let explicit_self: ast::explicit_self_ = Decodable::decode(this);
+                    explicit_self
                 }),
                 origin: this.read_struct_field("origin", 1, |this| {
                     let method_origin: method_origin =
diff --git a/src/librustc/middle/liveness.rs b/src/librustc/middle/liveness.rs
index 171048eac55..9995de24e8d 100644
--- a/src/librustc/middle/liveness.rs
+++ b/src/librustc/middle/liveness.rs
@@ -381,7 +381,7 @@ fn visit_fn(fk: &visit::fn_kind,
     // Add `this`, whether explicit or implicit.
     match *fk {
         fk_method(_, _, method) => {
-            match method.self_ty.node {
+            match method.explicit_self.node {
                 sty_value | sty_region(*) | sty_box(_) | sty_uniq(_) => {
                     fn_maps.add_variable(Arg(method.self_id,
                                              special_idents::self_));
diff --git a/src/librustc/middle/resolve.rs b/src/librustc/middle/resolve.rs
index a962ea07c54..91f565bcae6 100644
--- a/src/librustc/middle/resolve.rs
+++ b/src/librustc/middle/resolve.rs
@@ -10,7 +10,7 @@
 
 use driver::session::Session;
 use metadata::csearch::{each_path, get_trait_method_def_ids};
-use metadata::csearch::get_method_name_and_self_ty;
+use metadata::csearch::get_method_name_and_explicit_self;
 use metadata::csearch::get_static_methods_if_impl;
 use metadata::csearch::get_type_name_if_impl;
 use metadata::cstore::find_extern_mod_stmt_cnum;
@@ -28,7 +28,7 @@ use syntax::ast::{def_const, def_foreign_mod, def_fn, def_id, def_label};
 use syntax::ast::{def_local, def_mod, def_prim_ty, def_region, def_self};
 use syntax::ast::{def_self_ty, def_static_method, def_struct, def_ty};
 use syntax::ast::{def_ty_param, def_typaram_binder, def_trait};
-use syntax::ast::{def_upvar, def_use, def_variant, expr, expr_assign_op};
+use syntax::ast::{def_upvar, def_use, def_variant, explicit_self_, expr, expr_assign_op};
 use syntax::ast::{expr_binary, expr_break, expr_field};
 use syntax::ast::{expr_fn_block, expr_index, expr_method_call, expr_path};
 use syntax::ast::{def_prim_ty, def_region, def_self, def_ty, def_ty_param};
@@ -45,7 +45,7 @@ use syntax::ast::{local, local_crate, lt, method, mul};
 use syntax::ast::{named_field, ne, neg, node_id, pat, pat_enum, pat_ident};
 use syntax::ast::{Path, pat_lit, pat_range, pat_struct};
 use syntax::ast::{prim_ty, private, provided};
-use syntax::ast::{public, required, rem, self_ty_, shl, shr, stmt_decl};
+use syntax::ast::{public, required, rem, shl, shr, stmt_decl};
 use syntax::ast::{struct_field, struct_variant_kind};
 use syntax::ast::{sty_static, subtract, trait_ref, tuple_variant_kind, Ty};
 use syntax::ast::{ty_bool, ty_char, ty_f, ty_f32, ty_f64, ty_float, ty_i};
@@ -96,7 +96,7 @@ pub struct MethodInfo {
     did: def_id,
     n_tps: uint,
     ident: ident,
-    self_type: self_ty_
+    explicit_self: explicit_self_
 }
 
 pub struct Impl {
@@ -1203,7 +1203,7 @@ pub impl Resolver {
                 // Bail out early if there are no static methods.
                 let mut has_static_methods = false;
                 for methods.each |method| {
-                    match method.self_ty.node {
+                    match method.explicit_self.node {
                         sty_static => has_static_methods = true,
                         _ => {}
                     }
@@ -1236,7 +1236,7 @@ pub impl Resolver {
 
                         // For each static method...
                         for methods.each |method| {
-                            match method.self_ty.node {
+                            match method.explicit_self.node {
                                 sty_static => {
                                     // Add the static method to the
                                     // module.
@@ -1274,7 +1274,7 @@ pub impl Resolver {
                 let mut has_static_methods = false;
                 for (*methods).each |method| {
                     let ty_m = trait_method_to_ty_method(method);
-                    match ty_m.self_ty.node {
+                    match ty_m.explicit_self.node {
                         sty_static => {
                             has_static_methods = true;
                             break;
@@ -1306,7 +1306,7 @@ pub impl Resolver {
                     let ident = ty_m.ident;
                     // Add it to the trait info if not static,
                     // add it as a name in the trait module otherwise.
-                    match ty_m.self_ty.node {
+                    match ty_m.explicit_self.node {
                         sty_static => {
                             let def = def_static_method(
                                 local_def(ty_m.id),
@@ -1612,9 +1612,9 @@ pub impl Resolver {
                                                             def_id);
               let mut interned_method_names = HashSet::new();
               for method_def_ids.each |&method_def_id| {
-                  let (method_name, self_ty) =
-                      get_method_name_and_self_ty(self.session.cstore,
-                                                  method_def_id);
+                  let (method_name, explicit_self) =
+                      get_method_name_and_explicit_self(self.session.cstore,
+                                                        method_def_id);
 
                   debug!("(building reduced graph for \
                           external crate) ... adding \
@@ -1622,7 +1622,7 @@ pub impl Resolver {
                          *self.session.str_of(method_name));
 
                   // Add it to the trait info if not static.
-                  if self_ty != sty_static {
+                  if explicit_self != sty_static {
                       interned_method_names.insert(method_name);
                   }
               }
@@ -3774,7 +3774,7 @@ pub impl Resolver {
                               outer_type_parameter_count,
                               rib_kind);
         // we only have self ty if it is a non static method
-        let self_binding = match method.self_ty.node {
+        let self_binding = match method.explicit_self.node {
           sty_static => { NoSelfBinding }
           _ => { HasSelfBinding(method.self_id, false) }
         };
diff --git a/src/librustc/middle/resolve_stage0.rs b/src/librustc/middle/resolve_stage0.rs
index 2fc0fdca317..773de1577f7 100644
--- a/src/librustc/middle/resolve_stage0.rs
+++ b/src/librustc/middle/resolve_stage0.rs
@@ -11,7 +11,7 @@
 use driver::session;
 use driver::session::Session;
 use metadata::csearch::{each_path, get_trait_method_def_ids};
-use metadata::csearch::get_method_name_and_self_ty;
+use metadata::csearch::get_method_name_and_explicit_self;
 use metadata::csearch::get_static_methods_if_impl;
 use metadata::csearch::get_type_name_if_impl;
 use metadata::cstore::find_extern_mod_stmt_cnum;
@@ -46,7 +46,7 @@ use syntax::ast::{local, local_crate, lt, method, mul};
 use syntax::ast::{named_field, ne, neg, node_id, pat, pat_enum, pat_ident};
 use syntax::ast::{Path, pat_lit, pat_range, pat_struct};
 use syntax::ast::{prim_ty, private, provided};
-use syntax::ast::{public, required, rem, self_ty_, shl, shr, stmt_decl};
+use syntax::ast::{public, required, rem, explicit_self_, shl, shr, stmt_decl};
 use syntax::ast::{struct_field, struct_variant_kind};
 use syntax::ast::{sty_static, subtract, trait_ref, tuple_variant_kind, Ty};
 use syntax::ast::{ty_bool, ty_char, ty_f, ty_f32, ty_f64, ty_float, ty_i};
@@ -97,7 +97,7 @@ pub struct MethodInfo {
     did: def_id,
     n_tps: uint,
     ident: ident,
-    self_type: self_ty_
+    explicit_self: explicit_self_
 }
 
 pub struct Impl {
@@ -1219,7 +1219,7 @@ pub impl Resolver {
                 // Bail out early if there are no static methods.
                 let mut has_static_methods = false;
                 for methods.each |method| {
-                    match method.self_ty.node {
+                    match method.explicit_self.node {
                         sty_static => has_static_methods = true,
                         _ => {}
                     }
@@ -1252,7 +1252,7 @@ pub impl Resolver {
 
                         // For each static method...
                         for methods.each |method| {
-                            match method.self_ty.node {
+                            match method.explicit_self.node {
                                 sty_static => {
                                     // Add the static method to the
                                     // module.
@@ -1290,7 +1290,7 @@ pub impl Resolver {
                 let mut has_static_methods = false;
                 for (*methods).each |method| {
                     let ty_m = trait_method_to_ty_method(method);
-                    match ty_m.self_ty.node {
+                    match ty_m.explicit_self.node {
                         sty_static => {
                             has_static_methods = true;
                             break;
@@ -1322,7 +1322,7 @@ pub impl Resolver {
                     let ident = ty_m.ident;
                     // Add it to the trait info if not static,
                     // add it as a name in the trait module otherwise.
-                    match ty_m.self_ty.node {
+                    match ty_m.explicit_self.node {
                         sty_static => {
                             let def = def_static_method(
                                 local_def(ty_m.id),
@@ -1628,9 +1628,9 @@ pub impl Resolver {
                                                             def_id);
               let mut interned_method_names = HashSet::new();
               for method_def_ids.each |&method_def_id| {
-                  let (method_name, self_ty) =
-                      get_method_name_and_self_ty(self.session.cstore,
-                                                  method_def_id);
+                  let (method_name, explicit_self) =
+                      get_method_name_and_explicit_self(self.session.cstore,
+                                                        method_def_id);
 
                   debug!("(building reduced graph for \
                           external crate) ... adding \
@@ -1638,7 +1638,7 @@ pub impl Resolver {
                          *self.session.str_of(method_name));
 
                   // Add it to the trait info if not static.
-                  if self_ty != sty_static {
+                  if explicit_self != sty_static {
                       interned_method_names.insert(method_name);
                   }
               }
@@ -3800,7 +3800,7 @@ pub impl Resolver {
                               outer_type_parameter_count,
                               rib_kind);
         // we only have self ty if it is a non static method
-        let self_binding = match method.self_ty.node {
+        let self_binding = match method.explicit_self.node {
           sty_static => { NoSelfBinding }
           _ => { HasSelfBinding(method.self_id, false) }
         };
diff --git a/src/librustc/middle/trans/inline.rs b/src/librustc/middle/trans/inline.rs
index e5c6244879d..10e019b2a37 100644
--- a/src/librustc/middle/trans/inline.rs
+++ b/src/librustc/middle/trans/inline.rs
@@ -99,14 +99,14 @@ pub fn maybe_instantiate_inline(ccx: @CrateContext, fn_id: ast::def_id,
               let path = vec::append(
                   ty::item_path(ccx.tcx, impl_did),
                   ~[path_name(mth.ident)]);
-              let self_kind = match mth.self_ty.node {
+              let self_kind = match mth.explicit_self.node {
                   ast::sty_static => no_self,
                   _ => {
                       let self_ty = ty::node_id_to_type(ccx.tcx,
                                                         mth.self_id);
                       debug!("calling inline trans_fn with self_ty %s",
                              ty_to_str(ccx.tcx, self_ty));
-                      match mth.self_ty.node {
+                      match mth.explicit_self.node {
                           ast::sty_value => impl_owned_self(self_ty),
                           _ => impl_self(self_ty),
                       }
diff --git a/src/librustc/middle/trans/meth.rs b/src/librustc/middle/trans/meth.rs
index 1bc509459cc..bdbb45bf275 100644
--- a/src/librustc/middle/trans/meth.rs
+++ b/src/librustc/middle/trans/meth.rs
@@ -103,7 +103,7 @@ pub fn trans_method(ccx: @CrateContext,
                     llfn: ValueRef,
                     impl_id: ast::def_id) {
     // figure out how self is being passed
-    let self_arg = match method.self_ty.node {
+    let self_arg = match method.explicit_self.node {
       ast::sty_static => {
         no_self
       }
@@ -123,7 +123,7 @@ pub fn trans_method(ccx: @CrateContext,
         debug!("calling trans_fn with base_self_ty %s, self_ty %s",
                base_self_ty.repr(ccx.tcx),
                self_ty.repr(ccx.tcx));
-        match method.self_ty.node {
+        match method.explicit_self.node {
           ast::sty_value => {
             impl_owned_self(self_ty)
           }
@@ -590,7 +590,7 @@ pub fn trans_trait_callee(bcx: block,
                           n_method: uint,
                           self_expr: @ast::expr,
                           store: ty::TraitStore,
-                          explicit_self: ast::self_ty_)
+                          explicit_self: ast::explicit_self_)
                        -> Callee {
     //!
     //
@@ -627,7 +627,7 @@ pub fn trans_trait_callee_from_llval(bcx: block,
                                      n_method: uint,
                                      llpair: ValueRef,
                                      store: ty::TraitStore,
-                                     explicit_self: ast::self_ty_)
+                                     explicit_self: ast::explicit_self_)
                                   -> Callee {
     //!
     //
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index a6cd7b4a56f..7f6e828474f 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -58,7 +58,7 @@ pub struct method {
     generics: ty::Generics,
     transformed_self_ty: Option<ty::t>,
     fty: BareFnTy,
-    self_ty: ast::self_ty_,
+    explicit_self: ast::explicit_self_,
     vis: ast::visibility,
     def_id: ast::def_id
 }
diff --git a/src/librustc/middle/typeck/astconv.rs b/src/librustc/middle/typeck/astconv.rs
index ffd4d0948cd..de6064b0a31 100644
--- a/src/librustc/middle/typeck/astconv.rs
+++ b/src/librustc/middle/typeck/astconv.rs
@@ -542,7 +542,7 @@ pub fn bound_lifetimes<AC:AstConv>(
 
 struct SelfInfo {
     untransformed_self_ty: ty::t,
-    self_transform: ast::self_ty
+    explicit_self: ast::explicit_self
 }
 
 pub fn ty_of_method<AC:AstConv,RS:region_scope + Copy + 'static>(
@@ -551,12 +551,12 @@ pub fn ty_of_method<AC:AstConv,RS:region_scope + Copy + 'static>(
     purity: ast::purity,
     lifetimes: &OptVec<ast::Lifetime>,
     untransformed_self_ty: ty::t,
-    self_transform: ast::self_ty,
+    explicit_self: ast::explicit_self,
     decl: &ast::fn_decl) -> (Option<ty::t>, ty::BareFnTy)
 {
     let self_info = SelfInfo {
         untransformed_self_ty: untransformed_self_ty,
-        self_transform: self_transform
+        explicit_self: explicit_self
     };
     let (a, b) = ty_of_method_or_bare_fn(
         this, rscope, purity, AbiSet::Rust(), lifetimes, Some(&self_info), decl);
@@ -617,7 +617,7 @@ fn ty_of_method_or_bare_fn<AC:AstConv,RS:region_scope + Copy + 'static>(
         rscope: &RS,
         self_info: &SelfInfo) -> Option<ty::t>
     {
-        match self_info.self_transform.node {
+        match self_info.explicit_self.node {
             ast::sty_static => None,
             ast::sty_value => {
                 Some(self_info.untransformed_self_ty)
@@ -625,7 +625,7 @@ fn ty_of_method_or_bare_fn<AC:AstConv,RS:region_scope + Copy + 'static>(
             ast::sty_region(lifetime, mutability) => {
                 let region =
                     ast_region_to_region(this, rscope,
-                                         self_info.self_transform.span,
+                                         self_info.explicit_self.span,
                                          lifetime);
                 Some(ty::mk_rptr(this.tcx(), region,
                                  ty::mt {ty: self_info.untransformed_self_ty,
diff --git a/src/librustc/middle/typeck/check/method.rs b/src/librustc/middle/typeck/check/method.rs
index 88e4a8094db..2266273c3a9 100644
--- a/src/librustc/middle/typeck/check/method.rs
+++ b/src/librustc/middle/typeck/check/method.rs
@@ -381,7 +381,7 @@ pub impl<'self> LookupContext<'self> {
             let trait_methods = ty::trait_methods(tcx, bound_trait_ref.def_id);
             let pos = {
                 match trait_methods.position(|m| {
-                    m.self_ty != ast::sty_static &&
+                    m.explicit_self != ast::sty_static &&
                         m.ident == self.m_name })
                 {
                     Some(pos) => pos,
@@ -948,11 +948,11 @@ pub impl<'self> LookupContext<'self> {
         self.enforce_drop_trait_limitations(candidate);
 
         // static methods should never have gotten this far:
-        assert!(candidate.method_ty.self_ty != sty_static);
+        assert!(candidate.method_ty.explicit_self != sty_static);
 
         let transformed_self_ty = match candidate.origin {
             method_trait(*) => {
-                match candidate.method_ty.self_ty {
+                match candidate.method_ty.explicit_self {
                     sty_region(*) => {
                         // FIXME(#5762) again, preserving existing
                         // behavior here which (for &self) desires
@@ -1033,7 +1033,7 @@ pub impl<'self> LookupContext<'self> {
         let fty = ty::mk_bare_fn(tcx, ty::BareFnTy {sig: fn_sig, ..bare_fn_ty});
         debug!("after replacing bound regions, fty=%s", self.ty_to_str(fty));
 
-        let self_mode = get_mode_from_self_type(candidate.method_ty.self_ty);
+        let self_mode = get_mode_from_explicit_self(candidate.method_ty.explicit_self);
 
         // before we only checked whether self_ty could be a subtype
         // of rcvr_ty; now we actually make it so (this may cause
@@ -1055,7 +1055,7 @@ pub impl<'self> LookupContext<'self> {
         method_map_entry {
             self_ty: candidate.rcvr_ty,
             self_mode: self_mode,
-            explicit_self: candidate.method_ty.self_ty,
+            explicit_self: candidate.method_ty.explicit_self,
             origin: candidate.origin,
         }
     }
@@ -1126,7 +1126,7 @@ pub impl<'self> LookupContext<'self> {
         // on an @Trait object here and so forth
         match candidate.origin {
             method_trait(*) => {
-                match candidate.method_ty.self_ty {
+                match candidate.method_ty.explicit_self {
                     sty_static | sty_value => {
                         return false;
                     }
@@ -1144,7 +1144,7 @@ pub impl<'self> LookupContext<'self> {
             _ => {}
         }
 
-        return match candidate.method_ty.self_ty {
+        return match candidate.method_ty.explicit_self {
             sty_static => {
                 false
             }
@@ -1301,8 +1301,8 @@ pub impl<'self> LookupContext<'self> {
     }
 }
 
-pub fn get_mode_from_self_type(self_type: ast::self_ty_) -> SelfMode {
-    match self_type {
+pub fn get_mode_from_explicit_self(explicit_self: ast::explicit_self_) -> SelfMode {
+    match explicit_self {
         sty_value => ty::ByCopy,
         _ => ty::ByRef,
     }
diff --git a/src/librustc/middle/typeck/check/mod.rs b/src/librustc/middle/typeck/check/mod.rs
index edc60d9c443..942f73b4555 100644
--- a/src/librustc/middle/typeck/check/mod.rs
+++ b/src/librustc/middle/typeck/check/mod.rs
@@ -527,7 +527,7 @@ pub fn check_method(ccx: @mut CrateCtxt,
     let opt_self_info = method_ty.transformed_self_ty.map(|&ty| {
         SelfInfo {self_ty: ty,
                   self_id: method.self_id,
-                  span: method.self_ty.span}
+                  span: method.explicit_self.span}
     });
 
     check_bare_fn(
diff --git a/src/librustc/middle/typeck/coherence.rs b/src/librustc/middle/typeck/coherence.rs
index 17103806d1e..d331bedde12 100644
--- a/src/librustc/middle/typeck/coherence.rs
+++ b/src/librustc/middle/typeck/coherence.rs
@@ -156,7 +156,7 @@ pub fn method_to_MethodInfo(ast_method: @method) -> @MethodInfo {
         did: local_def(ast_method.id),
         n_tps: ast_method.generics.ty_params.len(),
         ident: ast_method.ident,
-        self_type: ast_method.self_ty.node
+        explicit_self: ast_method.explicit_self.node
     }
 }
 
@@ -383,7 +383,7 @@ pub impl CoherenceChecker {
                         did: new_did,
                         n_tps: trait_method.generics.type_param_defs.len(),
                         ident: trait_method.ident,
-                        self_type: trait_method.self_ty
+                        explicit_self: trait_method.explicit_self
                     },
                     trait_method_def_id: trait_method.def_id
                 };
@@ -975,7 +975,7 @@ pub impl CoherenceChecker {
                         did: new_did,
                         n_tps: trait_method_info.ty.generics.type_param_defs.len(),
                         ident: trait_method_info.ty.ident,
-                        self_type: trait_method_info.ty.self_ty
+                        explicit_self: trait_method_info.ty.explicit_self
                     },
                     trait_method_def_id: trait_method_info.def_id
                 };
@@ -1126,7 +1126,7 @@ fn subst_receiver_types_in_method_ty(
         // method types *can* appear in the generic bounds or the fty
         generics: method.generics.subst(tcx, &combined_substs),
         fty: method.fty.subst(tcx, &combined_substs),
-        self_ty: method.self_ty,
+        explicit_self: method.explicit_self,
         vis: method.vis,
         def_id: new_def_id
     }
diff --git a/src/librustc/middle/typeck/collect.rs b/src/librustc/middle/typeck/collect.rs
index deea46cea1a..927867cbfb9 100644
--- a/src/librustc/middle/typeck/collect.rs
+++ b/src/librustc/middle/typeck/collect.rs
@@ -52,7 +52,7 @@ use syntax::ast_map;
 use syntax::ast_util::{local_def, split_trait_methods};
 use syntax::codemap::span;
 use syntax::codemap;
-use syntax::print::pprust::{path_to_str, self_ty_to_str};
+use syntax::print::pprust::{path_to_str, explicit_self_to_str};
 use syntax::visit;
 use syntax::opt_vec::OptVec;
 use syntax::opt_vec;
@@ -234,19 +234,19 @@ pub fn ensure_trait_methods(ccx: &CrateCtxt,
                     &ast::required(ref m) => {
                         ty_method_of_trait_method(
                             ccx, trait_id, region_paramd, generics,
-                            &m.id, &m.ident, &m.self_ty,
+                            &m.id, &m.ident, &m.explicit_self,
                             &m.generics, &m.purity, &m.decl)
                     }
 
                     &ast::provided(ref m) => {
                         ty_method_of_trait_method(
                             ccx, trait_id, region_paramd, generics,
-                            &m.id, &m.ident, &m.self_ty,
+                            &m.id, &m.ident, &m.explicit_self,
                             &m.generics, &m.purity, &m.decl)
                     }
                 };
 
-                if ty_method.self_ty == ast::sty_static {
+                if ty_method.explicit_self == ast::sty_static {
                     make_static_method_ty(ccx, trait_id, ty_method,
                                           &trait_ty_generics);
                 }
@@ -376,23 +376,23 @@ pub fn ensure_trait_methods(ccx: &CrateCtxt,
                                  trait_generics: &ast::Generics,
                                  m_id: &ast::node_id,
                                  m_ident: &ast::ident,
-                                 m_self_ty: &ast::self_ty,
+                                 m_explicit_self: &ast::explicit_self,
                                  m_generics: &ast::Generics,
                                  m_purity: &ast::purity,
                                  m_decl: &ast::fn_decl) -> ty::method
     {
         let trait_self_ty = ty::mk_self(this.tcx, local_def(trait_id));
-        let rscope = MethodRscope::new(m_self_ty.node, trait_rp, trait_generics);
+        let rscope = MethodRscope::new(m_explicit_self.node, trait_rp, trait_generics);
         let (transformed_self_ty, fty) =
             astconv::ty_of_method(this, &rscope, *m_purity, &m_generics.lifetimes,
-                                  trait_self_ty, *m_self_ty, m_decl);
+                                  trait_self_ty, *m_explicit_self, m_decl);
         let num_trait_type_params = trait_generics.ty_params.len();
         ty::method {
             ident: *m_ident,
             generics: ty_generics(this, None, m_generics, num_trait_type_params),
             transformed_self_ty: transformed_self_ty,
             fty: fty,
-            self_ty: m_self_ty.node,
+            explicit_self: m_explicit_self.node,
             // assume public, because this is only invoked on trait methods
             vis: ast::public,
             def_id: local_def(*m_id)
@@ -459,7 +459,7 @@ pub fn compare_impl_method(tcx: ty::ctxt,
     // that the error messages you get out of this code are a bit more
     // inscrutable, particularly for cases where one method has no
     // self.
-    match (&trait_m.self_ty, &impl_m.self_ty) {
+    match (&trait_m.explicit_self, &impl_m.explicit_self) {
         (&ast::sty_static, &ast::sty_static) => {}
         (&ast::sty_static, _) => {
             tcx.sess.span_err(
@@ -467,7 +467,7 @@ pub fn compare_impl_method(tcx: ty::ctxt,
                 fmt!("method `%s` has a `%s` declaration in the impl, \
                       but not in the trait",
                      *tcx.sess.str_of(trait_m.ident),
-                     self_ty_to_str(impl_m.self_ty, tcx.sess.intr())));
+                     explicit_self_to_str(impl_m.explicit_self, tcx.sess.intr())));
             return;
         }
         (_, &ast::sty_static) => {
@@ -476,7 +476,7 @@ pub fn compare_impl_method(tcx: ty::ctxt,
                 fmt!("method `%s` has a `%s` declaration in the trait, \
                       but not in the impl",
                      *tcx.sess.str_of(trait_m.ident),
-                     self_ty_to_str(trait_m.self_ty, tcx.sess.intr())));
+                     explicit_self_to_str(trait_m.explicit_self, tcx.sess.intr())));
             return;
         }
         _ => {
@@ -778,14 +778,14 @@ pub fn convert_methods(ccx: &CrateCtxt,
                     rcvr_visibility: ast::visibility,
                     method_generics: &ast::Generics) -> ty::method
     {
-        let rscope = MethodRscope::new(m.self_ty.node,
+        let rscope = MethodRscope::new(m.explicit_self.node,
                                        rp,
                                        rcvr_generics);
         let (transformed_self_ty, fty) =
             astconv::ty_of_method(ccx, &rscope, m.purity,
                                   &method_generics.lifetimes,
                                   untransformed_rcvr_ty,
-                                  m.self_ty, &m.decl);
+                                  m.explicit_self, &m.decl);
 
         // if the method specifies a visibility, use that, otherwise
         // inherit the visibility from the impl (so `foo` in `pub impl
@@ -799,7 +799,7 @@ pub fn convert_methods(ccx: &CrateCtxt,
             generics: ty_generics(ccx, None, &m.generics, num_rcvr_type_params),
             transformed_self_ty: transformed_self_ty,
             fty: fty,
-            self_ty: m.self_ty.node,
+            explicit_self: m.explicit_self.node,
             vis: method_vis,
             def_id: local_def(m.id)
         }
diff --git a/src/librustc/middle/typeck/mod.rs b/src/librustc/middle/typeck/mod.rs
index 19bd2dd16ab..95c8f242b49 100644
--- a/src/librustc/middle/typeck/mod.rs
+++ b/src/librustc/middle/typeck/mod.rs
@@ -124,7 +124,7 @@ pub struct method_map_entry {
     self_mode: ty::SelfMode,
 
     // the type of explicit self on the method
-    explicit_self: ast::self_ty_,
+    explicit_self: ast::explicit_self_,
 
     // method details being invoked
     origin: method_origin,
diff --git a/src/librustc/middle/typeck/rscope.rs b/src/librustc/middle/typeck/rscope.rs
index f7bf5106fa6..7c37784b09d 100644
--- a/src/librustc/middle/typeck/rscope.rs
+++ b/src/librustc/middle/typeck/rscope.rs
@@ -142,7 +142,7 @@ impl RegionParameterization {
 }
 
 pub struct MethodRscope {
-    self_ty: ast::self_ty_,
+    explicit_self: ast::explicit_self_,
     variance: Option<ty::region_variance>,
     region_param_names: RegionParamNames,
 }
@@ -150,14 +150,14 @@ pub struct MethodRscope {
 impl MethodRscope {
     // `generics` here refers to the generics of the outer item (impl or
     // trait).
-    pub fn new(self_ty: ast::self_ty_,
+    pub fn new(explicit_self: ast::explicit_self_,
                variance: Option<ty::region_variance>,
                rcvr_generics: &ast::Generics)
             -> MethodRscope {
         let region_param_names =
             RegionParamNames::from_generics(rcvr_generics);
         MethodRscope {
-            self_ty: self_ty,
+            explicit_self: explicit_self,
             variance: variance,
             region_param_names: region_param_names
         }
diff --git a/src/librustc/util/ppaux.rs b/src/librustc/util/ppaux.rs
index 713d2360b63..027dff368a0 100644
--- a/src/librustc/util/ppaux.rs
+++ b/src/librustc/util/ppaux.rs
@@ -636,12 +636,12 @@ impl Repr for ty::Generics {
 impl Repr for ty::method {
     fn repr(&self, tcx: ctxt) -> ~str {
         fmt!("method {ident: %s, generics: %s, transformed_self_ty: %s, \
-              fty: %s, self_ty: %s, vis: %s, def_id: %s}",
+              fty: %s, explicit_self: %s, vis: %s, def_id: %s}",
              self.ident.repr(tcx),
              self.generics.repr(tcx),
              self.transformed_self_ty.repr(tcx),
              self.fty.repr(tcx),
-             self.self_ty.repr(tcx),
+             self.explicit_self.repr(tcx),
              self.vis.repr(tcx),
              self.def_id.repr(tcx))
     }
@@ -653,7 +653,7 @@ impl Repr for ast::ident {
     }
 }
 
-impl Repr for ast::self_ty_ {
+impl Repr for ast::explicit_self_ {
     fn repr(&self, _tcx: ctxt) -> ~str {
         fmt!("%?", *self)
     }
diff --git a/src/librustdoc/tystr_pass.rs b/src/librustdoc/tystr_pass.rs
index bd6777df4af..18fdf958aa9 100644
--- a/src/librustdoc/tystr_pass.rs
+++ b/src/librustdoc/tystr_pass.rs
@@ -187,7 +187,7 @@ fn get_method_sig(
                                     &ty_m.decl,
                                     ty_m.purity,
                                     ty_m.ident,
-                                    Some(ty_m.self_ty.node),
+                                    Some(ty_m.explicit_self.node),
                                     &ty_m.generics,
                                     extract::interner()
                                 ))
@@ -197,7 +197,7 @@ fn get_method_sig(
                                     &m.decl,
                                     m.purity,
                                     m.ident,
-                                    Some(m.self_ty.node),
+                                    Some(m.explicit_self.node),
                                     &m.generics,
                                     extract::interner()
                                 ))
@@ -218,7 +218,7 @@ fn get_method_sig(
                             &method.decl,
                             method.purity,
                             method.ident,
-                            Some(method.self_ty.node),
+                            Some(method.explicit_self.node),
                             &method.generics,
                             extract::interner()
                         ))
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 4ef38c300c6..b508ae48c36 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -767,7 +767,7 @@ pub struct ty_method {
     purity: purity,
     decl: fn_decl,
     generics: Generics,
-    self_ty: self_ty,
+    explicit_self: explicit_self,
     id: node_id,
     span: span,
 }
@@ -1064,7 +1064,7 @@ impl to_bytes::IterBytes for ret_style {
 #[auto_encode]
 #[auto_decode]
 #[deriving(Eq)]
-pub enum self_ty_ {
+pub enum explicit_self_ {
     sty_static,                                // no self
     sty_value,                                 // `self`
     sty_region(Option<@Lifetime>, mutability), // `&'lt self`
@@ -1073,7 +1073,7 @@ pub enum self_ty_ {
 }
 
 #[cfg(stage0)]
-impl to_bytes::IterBytes for self_ty_ {
+impl to_bytes::IterBytes for explicit_self_ {
     fn iter_bytes(&self, lsb0: bool, f: to_bytes::Cb) {
         match *self {
             sty_static => 0u8.iter_bytes(lsb0, f),
@@ -1086,7 +1086,7 @@ impl to_bytes::IterBytes for self_ty_ {
 }
 
 #[cfg(not(stage0))]
-impl to_bytes::IterBytes for self_ty_ {
+impl to_bytes::IterBytes for explicit_self_ {
     fn iter_bytes(&self, lsb0: bool, f: to_bytes::Cb) -> bool {
         match *self {
             sty_static => 0u8.iter_bytes(lsb0, f),
@@ -1098,7 +1098,7 @@ impl to_bytes::IterBytes for self_ty_ {
     }
 }
 
-pub type self_ty = spanned<self_ty_>;
+pub type explicit_self = spanned<explicit_self_>;
 
 #[auto_encode]
 #[auto_decode]
@@ -1107,7 +1107,7 @@ pub struct method {
     ident: ident,
     attrs: ~[attribute],
     generics: Generics,
-    self_ty: self_ty,
+    explicit_self: explicit_self,
     purity: purity,
     decl: fn_decl,
     body: blk,
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 212ceadf912..a98e3002dcf 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -272,7 +272,7 @@ pub fn trait_method_to_ty_method(method: &trait_method) -> ty_method {
                 purity: m.purity,
                 decl: copy m.decl,
                 generics: copy m.generics,
-                self_ty: m.self_ty,
+                explicit_self: m.explicit_self,
                 id: m.id,
                 span: m.span,
             }
diff --git a/src/libsyntax/ext/auto_encode.rs b/src/libsyntax/ext/auto_encode.rs
index ac86d266d73..fa9d69c6e99 100644
--- a/src/libsyntax/ext/auto_encode.rs
+++ b/src/libsyntax/ext/auto_encode.rs
@@ -713,7 +713,7 @@ fn mk_ser_method(
         ident: cx.ident_of("encode"),
         attrs: ~[],
         generics: ast_util::empty_generics(),
-        self_ty: codemap::spanned {
+        explicit_self: codemap::spanned {
             node: ast::sty_region(None, ast::m_imm),
             span: span
         },
@@ -772,7 +772,7 @@ fn mk_deser_method(
         ident: cx.ident_of("decode"),
         attrs: ~[],
         generics: ast_util::empty_generics(),
-        self_ty: codemap::spanned { node: ast::sty_static, span: span },
+        explicit_self: codemap::spanned { node: ast::sty_static, span: span },
         purity: ast::impure_fn,
         decl: deser_decl,
         body: deser_body,
diff --git a/src/libsyntax/ext/deriving/clone.rs b/src/libsyntax/ext/deriving/clone.rs
index 2151e9529c4..1a45107c267 100644
--- a/src/libsyntax/ext/deriving/clone.rs
+++ b/src/libsyntax/ext/deriving/clone.rs
@@ -28,7 +28,7 @@ pub fn expand_deriving_clone(cx: @ext_ctxt,
             MethodDef {
                 name: ~"clone",
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[],
                 ret_ty: Self,
                 const_nonmatching: false,
diff --git a/src/libsyntax/ext/deriving/cmp/eq.rs b/src/libsyntax/ext/deriving/cmp/eq.rs
index e431e1f78bf..7fc2fdc7963 100644
--- a/src/libsyntax/ext/deriving/cmp/eq.rs
+++ b/src/libsyntax/ext/deriving/cmp/eq.rs
@@ -34,7 +34,7 @@ pub fn expand_deriving_eq(cx: @ext_ctxt,
             MethodDef {
                 name: $name,
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[borrowed_self()],
                 ret_ty: Literal(Path::new(~[~"bool"])),
                 const_nonmatching: true,
diff --git a/src/libsyntax/ext/deriving/cmp/ord.rs b/src/libsyntax/ext/deriving/cmp/ord.rs
index cdb9f620301..5445aef4491 100644
--- a/src/libsyntax/ext/deriving/cmp/ord.rs
+++ b/src/libsyntax/ext/deriving/cmp/ord.rs
@@ -24,7 +24,7 @@ pub fn expand_deriving_ord(cx: @ext_ctxt,
             MethodDef {
                 name: $name,
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[borrowed_self()],
                 ret_ty: Literal(Path::new(~[~"bool"])),
                 const_nonmatching: false,
diff --git a/src/libsyntax/ext/deriving/cmp/totaleq.rs b/src/libsyntax/ext/deriving/cmp/totaleq.rs
index 068a7bc06b1..4541569b829 100644
--- a/src/libsyntax/ext/deriving/cmp/totaleq.rs
+++ b/src/libsyntax/ext/deriving/cmp/totaleq.rs
@@ -33,7 +33,7 @@ pub fn expand_deriving_totaleq(cx: @ext_ctxt,
             MethodDef {
                 name: ~"equals",
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[borrowed_self()],
                 ret_ty: Literal(Path::new(~[~"bool"])),
                 const_nonmatching: true,
diff --git a/src/libsyntax/ext/deriving/cmp/totalord.rs b/src/libsyntax/ext/deriving/cmp/totalord.rs
index 5ec4e028454..8f156e6a9e3 100644
--- a/src/libsyntax/ext/deriving/cmp/totalord.rs
+++ b/src/libsyntax/ext/deriving/cmp/totalord.rs
@@ -27,7 +27,7 @@ pub fn expand_deriving_totalord(cx: @ext_ctxt,
             MethodDef {
                 name: ~"cmp",
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[borrowed_self()],
                 ret_ty: Literal(Path::new(~[~"core", ~"cmp", ~"Ordering"])),
                 const_nonmatching: false,
diff --git a/src/libsyntax/ext/deriving/decodable.rs b/src/libsyntax/ext/deriving/decodable.rs
index fd5d26a1787..3be65ecd8db 100644
--- a/src/libsyntax/ext/deriving/decodable.rs
+++ b/src/libsyntax/ext/deriving/decodable.rs
@@ -119,13 +119,13 @@ fn create_decode_method(
     let body_block = build::mk_simple_block(cx, span, expr);
 
     // Create the method.
-    let self_ty = spanned { node: sty_static, span: span };
+    let explicit_self = spanned { node: sty_static, span: span };
     let method_ident = cx.ident_of("decode");
     @ast::method {
         ident: method_ident,
         attrs: ~[],
         generics: ast_util::empty_generics(),
-        self_ty: self_ty,
+        explicit_self: explicit_self,
         purity: impure_fn,
         decl: fn_decl,
         body: body_block,
diff --git a/src/libsyntax/ext/deriving/encodable.rs b/src/libsyntax/ext/deriving/encodable.rs
index a5edd92022f..2078ec9d45c 100644
--- a/src/libsyntax/ext/deriving/encodable.rs
+++ b/src/libsyntax/ext/deriving/encodable.rs
@@ -111,13 +111,13 @@ fn create_encode_method(
     let body_block = build::mk_block_(cx, span, statements);
 
     // Create the method.
-    let self_ty = spanned { node: sty_region(None, m_imm), span: span };
+    let explicit_self = spanned { node: sty_region(None, m_imm), span: span };
     let method_ident = cx.ident_of("encode");
     @ast::method {
         ident: method_ident,
         attrs: ~[],
         generics: ast_util::empty_generics(),
-        self_ty: self_ty,
+        explicit_self: explicit_self,
         purity: impure_fn,
         decl: fn_decl,
         body: body_block,
diff --git a/src/libsyntax/ext/deriving/generic.rs b/src/libsyntax/ext/deriving/generic.rs
index be2cc6dd25e..fc14e3c3f73 100644
--- a/src/libsyntax/ext/deriving/generic.rs
+++ b/src/libsyntax/ext/deriving/generic.rs
@@ -216,7 +216,7 @@ pub struct MethodDef<'self> {
     /// Whether there is a self argument (outer Option) i.e. whether
     /// this is a static function, and whether it is a pointer (inner
     /// Option)
-    self_ty: Option<Option<PtrTy>>,
+    explicit_self: Option<Option<PtrTy>>,
 
     /// Arguments other than the self argument
     args: ~[Ty],
@@ -321,7 +321,7 @@ impl<'self> TraitDef<'self> {
                          type_ident: ident,
                          generics: &Generics) -> @ast::item {
         let methods = do self.methods.map |method_def| {
-            let (self_ty, self_args, nonself_args, tys) =
+            let (explicit_self, self_args, nonself_args, tys) =
                 method_def.split_self_nonself_args(cx, span, type_ident, generics);
 
             let body = if method_def.is_static() {
@@ -339,7 +339,7 @@ impl<'self> TraitDef<'self> {
 
             method_def.create_method(cx, span,
                                      type_ident, generics,
-                                     self_ty, tys,
+                                     explicit_self, tys,
                                      body)
         };
 
@@ -352,7 +352,7 @@ impl<'self> TraitDef<'self> {
                        type_ident: ident,
                        generics: &Generics) -> @ast::item {
         let methods = do self.methods.map |method_def| {
-            let (self_ty, self_args, nonself_args, tys) =
+            let (explicit_self, self_args, nonself_args, tys) =
                 method_def.split_self_nonself_args(cx, span, type_ident, generics);
 
             let body = if method_def.is_static() {
@@ -370,7 +370,7 @@ impl<'self> TraitDef<'self> {
 
             method_def.create_method(cx, span,
                                      type_ident, generics,
-                                     self_ty, tys,
+                                     explicit_self, tys,
                                      body)
         };
 
@@ -404,28 +404,27 @@ impl<'self> MethodDef<'self> {
     }
 
     fn is_static(&self) -> bool {
-        self.self_ty.is_none()
+        self.explicit_self.is_none()
     }
 
     fn split_self_nonself_args(&self, cx: @ext_ctxt, span: span,
                              type_ident: ident, generics: &Generics)
-        -> (ast::self_ty, ~[@expr], ~[@expr], ~[(ident, @ast::Ty)]) {
+        -> (ast::explicit_self, ~[@expr], ~[@expr], ~[(ident, @ast::Ty)]) {
 
         let mut self_args = ~[], nonself_args = ~[], arg_tys = ~[];
-        let mut ast_self_ty = respan(span, ast::sty_static);
         let mut nonstatic = false;
 
-        match self.self_ty {
+        let ast_explicit_self = match self.explicit_self {
             Some(ref self_ptr) => {
-                let (self_expr, self_ty) = ty::get_explicit_self(cx, span,
-                                                                 self_ptr);
+                let (self_expr, explicit_self) = ty::get_explicit_self(cx, span, self_ptr);
 
-                ast_self_ty = self_ty;
                 self_args.push(self_expr);
                 nonstatic = true;
+
+                explicit_self
             }
-            _ => {}
-        }
+            None => respan(span, ast::sty_static),
+        };
 
         for self.args.eachi |i, ty| {
             let ast_ty = ty.to_ty(cx, span, type_ident, generics);
@@ -449,13 +448,13 @@ impl<'self> MethodDef<'self> {
             }
         }
 
-        (ast_self_ty, self_args, nonself_args, arg_tys)
+        (ast_explicit_self, self_args, nonself_args, arg_tys)
     }
 
     fn create_method(&self, cx: @ext_ctxt, span: span,
                      type_ident: ident,
                      generics: &Generics,
-                     self_ty: ast::self_ty,
+                     explicit_self: ast::explicit_self,
                      arg_types: ~[(ident, @ast::Ty)],
                      body: @expr) -> @ast::method {
         // create the generics that aren't for Self
@@ -477,7 +476,7 @@ impl<'self> MethodDef<'self> {
             ident: method_ident,
             attrs: ~[],
             generics: fn_generics,
-            self_ty: self_ty,
+            explicit_self: explicit_self,
             purity: ast::impure_fn,
             decl: fn_decl,
             body: body_block,
diff --git a/src/libsyntax/ext/deriving/iter_bytes.rs b/src/libsyntax/ext/deriving/iter_bytes.rs
index 9eb246ffe22..27e3a54add5 100644
--- a/src/libsyntax/ext/deriving/iter_bytes.rs
+++ b/src/libsyntax/ext/deriving/iter_bytes.rs
@@ -26,7 +26,7 @@ pub fn expand_deriving_iter_bytes(cx: @ext_ctxt,
             MethodDef {
                 name: ~"iter_bytes",
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[
                     Literal(Path::new(~[~"bool"])),
                     Literal(Path::new(~[~"core", ~"to_bytes", ~"Cb"]))
diff --git a/src/libsyntax/ext/deriving/rand.rs b/src/libsyntax/ext/deriving/rand.rs
index 9030be86f39..2d91fcd346a 100644
--- a/src/libsyntax/ext/deriving/rand.rs
+++ b/src/libsyntax/ext/deriving/rand.rs
@@ -32,7 +32,7 @@ pub fn expand_deriving_rand(cx: @ext_ctxt,
                     bounds: ~[(~"R",
                                ~[ Path::new(~[~"core", ~"rand", ~"Rng"]) ])]
                 },
-                self_ty: None,
+                explicit_self: None,
                 args: ~[
                     Ptr(~Literal(Path::new_local(~"R")),
                         Borrowed(None, ast::m_mutbl))
diff --git a/src/libsyntax/ext/deriving/to_str.rs b/src/libsyntax/ext/deriving/to_str.rs
index 6010354349e..13cb09e970d 100644
--- a/src/libsyntax/ext/deriving/to_str.rs
+++ b/src/libsyntax/ext/deriving/to_str.rs
@@ -27,7 +27,7 @@ pub fn expand_deriving_to_str(cx: @ext_ctxt,
             MethodDef {
                 name: ~"to_str",
                 generics: LifetimeBounds::empty(),
-                self_ty: borrowed_explicit_self(),
+                explicit_self: borrowed_explicit_self(),
                 args: ~[],
                 ret_ty: Ptr(~Literal(Path::new_local(~"str")), Owned),
                 const_nonmatching: false,
diff --git a/src/libsyntax/ext/deriving/ty.rs b/src/libsyntax/ext/deriving/ty.rs
index 768ac7458d6..8fd372e4792 100644
--- a/src/libsyntax/ext/deriving/ty.rs
+++ b/src/libsyntax/ext/deriving/ty.rs
@@ -217,7 +217,7 @@ pub impl LifetimeBounds {
 
 
 pub fn get_explicit_self(cx: @ext_ctxt, span: span, self_ptr: &Option<PtrTy>)
-    -> (@expr, ast::self_ty) {
+    -> (@expr, ast::explicit_self) {
     let self_path = build::make_self(cx, span);
     match *self_ptr {
         None => {
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 6ed8994ed33..f6dbbbf420d 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -323,7 +323,7 @@ fn noop_fold_method(m: @method, fld: @ast_fold) -> @method {
         ident: fld.fold_ident(m.ident),
         attrs: /* FIXME (#2543) */ copy m.attrs,
         generics: fold_generics(&m.generics, fld),
-        self_ty: m.self_ty,
+        explicit_self: m.explicit_self,
         purity: m.purity,
         decl: fold_fn_decl(&m.decl, fld),
         body: fld.fold_block(&m.body),
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index e1fe20695c7..b1fa47f6917 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -19,7 +19,7 @@ use ast::{_mod, add, arg, arm, attribute, bind_by_ref, bind_infer};
 use ast::{bind_by_copy, bitand, bitor, bitxor, blk};
 use ast::{blk_check_mode, box};
 use ast::{crate, crate_cfg, decl, decl_item};
-use ast::{decl_local, default_blk, deref, div, enum_def};
+use ast::{decl_local, default_blk, deref, div, enum_def, explicit_self};
 use ast::{expr, expr_, expr_addr_of, expr_match, expr_again};
 use ast::{expr_assign, expr_assign_op, expr_binary, expr_block};
 use ast::{expr_break, expr_call, expr_cast, expr_copy, expr_do_body};
@@ -43,7 +43,7 @@ use ast::{named_field, neg, node_id, noreturn, not, pat, pat_box, pat_enum};
 use ast::{pat_ident, pat_lit, pat_range, pat_region, pat_struct};
 use ast::{pat_tup, pat_uniq, pat_wild, private};
 use ast::{rem, required};
-use ast::{ret_style, return_val, self_ty, shl, shr, stmt, stmt_decl};
+use ast::{ret_style, return_val, shl, shr, stmt, stmt_decl};
 use ast::{stmt_expr, stmt_semi, stmt_mac, struct_def, struct_field};
 use ast::{struct_variant_kind, subtract};
 use ast::{sty_box, sty_region, sty_static, sty_uniq, sty_value};
@@ -504,7 +504,7 @@ pub impl Parser {
 
             let generics = p.parse_generics();
 
-            let (self_ty, d) = do self.parse_fn_decl_with_self() |p| {
+            let (explicit_self, d) = do self.parse_fn_decl_with_self() |p| {
                 // This is somewhat dubious; We don't want to allow argument
                 // names to be left off if there is a definition...
                 either::Left(p.parse_arg_general(false))
@@ -526,7 +526,7 @@ pub impl Parser {
                     purity: pur,
                     decl: d,
                     generics: generics,
-                    self_ty: self_ty,
+                    explicit_self: explicit_self,
                     id: p.get_id(),
                     span: mk_sp(lo, hi)
                 })
@@ -540,7 +540,7 @@ pub impl Parser {
                     ident: ident,
                     attrs: attrs,
                     generics: generics,
-                    self_ty: self_ty,
+                    explicit_self: explicit_self,
                     purity: pur,
                     decl: d,
                     body: body,
@@ -3002,11 +3002,11 @@ pub impl Parser {
         &self,
         parse_arg_fn:
         &fn(&Parser) -> arg_or_capture_item
-    ) -> (self_ty, fn_decl) {
-        fn maybe_parse_self_ty(
-            cnstr: &fn(v: mutability) -> ast::self_ty_,
+    ) -> (explicit_self, fn_decl) {
+        fn maybe_parse_explicit_self(
+            cnstr: &fn(v: mutability) -> ast::explicit_self_,
             p: &Parser
-        ) -> ast::self_ty_ {
+        ) -> ast::explicit_self_ {
             // We need to make sure it isn't a mode or a type
             if p.token_is_keyword(&~"self", &p.look_ahead(1)) ||
                 ((p.token_is_keyword(&~"const", &p.look_ahead(1)) ||
@@ -3022,7 +3022,7 @@ pub impl Parser {
             }
         }
 
-        fn maybe_parse_borrowed_self_ty(this: &Parser) -> ast::self_ty_ {
+        fn maybe_parse_borrowed_explicit_self(this: &Parser) -> ast::explicit_self_ {
             // The following things are possible to see here:
             //
             //     fn(&self)
@@ -3066,15 +3066,15 @@ pub impl Parser {
         // A bit of complexity and lookahead is needed here in order to to be
         // backwards compatible.
         let lo = self.span.lo;
-        let self_ty = match *self.token {
+        let explicit_self = match *self.token {
           token::BINOP(token::AND) => {
-            maybe_parse_borrowed_self_ty(self)
+            maybe_parse_borrowed_explicit_self(self)
           }
           token::AT => {
-            maybe_parse_self_ty(sty_box, self)
+            maybe_parse_explicit_self(sty_box, self)
           }
           token::TILDE => {
-            maybe_parse_self_ty(sty_uniq, self)
+            maybe_parse_explicit_self(sty_uniq, self)
           }
           token::IDENT(*) if self.is_self_ident() => {
             self.bump();
@@ -3087,7 +3087,7 @@ pub impl Parser {
 
         // If we parsed a self type, expect a comma before the argument list.
         let args_or_capture_items;
-        if self_ty != sty_static {
+        if explicit_self != sty_static {
             match *self.token {
                 token::COMMA => {
                     self.bump();
@@ -3132,7 +3132,7 @@ pub impl Parser {
             cf: ret_style
         };
 
-        (spanned(lo, hi, self_ty), fn_decl)
+        (spanned(lo, hi, explicit_self), fn_decl)
     }
 
     // parse the |arg, arg| header on a lambda
@@ -3199,7 +3199,7 @@ pub impl Parser {
         let pur = self.parse_fn_purity();
         let ident = self.parse_ident();
         let generics = self.parse_generics();
-        let (self_ty, decl) = do self.parse_fn_decl_with_self() |p| {
+        let (explicit_self, decl) = do self.parse_fn_decl_with_self() |p| {
             p.parse_arg()
         };
 
@@ -3210,7 +3210,7 @@ pub impl Parser {
             ident: ident,
             attrs: attrs,
             generics: generics,
-            self_ty: self_ty,
+            explicit_self: explicit_self,
             purity: pur,
             decl: decl,
             body: body,
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 1e94c16f87a..49a30d153dc 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -181,12 +181,12 @@ pub fn path_to_str(p: @ast::Path, intr: @ident_interner) -> ~str {
 }
 
 pub fn fun_to_str(decl: &ast::fn_decl, purity: ast::purity, name: ast::ident,
-                  opt_self_ty: Option<ast::self_ty_>,
+                  opt_explicit_self: Option<ast::explicit_self_>,
                   generics: &ast::Generics, intr: @ident_interner) -> ~str {
     do io::with_str_writer |wr| {
         let s = rust_printer(wr, intr);
         print_fn(s, decl, Some(purity), AbiSet::Rust(),
-                 name, generics, opt_self_ty, ast::inherited);
+                 name, generics, opt_explicit_self, ast::inherited);
         end(s); // Close the head box
         end(s); // Close the outer box
         eof(s.s);
@@ -797,7 +797,7 @@ pub fn print_ty_method(s: @ps, m: &ast::ty_method) {
     print_outer_attributes(s, m.attrs);
     print_ty_fn(s, None, None, None, m.purity, ast::Many,
                 &m.decl, Some(m.ident), Some(&m.generics),
-                Some(/*bad*/ copy m.self_ty.node));
+                Some(/*bad*/ copy m.explicit_self.node));
     word(s.s, ~";");
 }
 
@@ -813,7 +813,7 @@ pub fn print_method(s: @ps, meth: @ast::method) {
     maybe_print_comment(s, meth.span.lo);
     print_outer_attributes(s, meth.attrs);
     print_fn(s, &meth.decl, Some(meth.purity), AbiSet::Rust(),
-             meth.ident, &meth.generics, Some(meth.self_ty.node),
+             meth.ident, &meth.generics, Some(meth.explicit_self.node),
              meth.vis);
     word(s.s, ~" ");
     print_block_with_attrs(s, &meth.body, meth.attrs);
@@ -1626,13 +1626,13 @@ pub fn print_pat(s: @ps, pat: @ast::pat, refutable: bool) {
     (s.ann.post)(ann_node);
 }
 
-pub fn self_ty_to_str(self_ty: ast::self_ty_, intr: @ident_interner) -> ~str {
-    to_str(self_ty, |a, b| { print_self_ty(a, b); () }, intr)
+pub fn explicit_self_to_str(explicit_self: ast::explicit_self_, intr: @ident_interner) -> ~str {
+    to_str(explicit_self, |a, b| { print_explicit_self(a, b); () }, intr)
 }
 
 // Returns whether it printed anything
-pub fn print_self_ty(s: @ps, self_ty: ast::self_ty_) -> bool {
-    match self_ty {
+pub fn print_explicit_self(s: @ps, explicit_self: ast::explicit_self_) -> bool {
+    match explicit_self {
         ast::sty_static => { return false; }
         ast::sty_value => { word(s.s, ~"self"); }
         ast::sty_region(lt, m) => {
@@ -1657,24 +1657,24 @@ pub fn print_fn(s: @ps,
                 abis: AbiSet,
                 name: ast::ident,
                 generics: &ast::Generics,
-                opt_self_ty: Option<ast::self_ty_>,
+                opt_explicit_self: Option<ast::explicit_self_>,
                 vis: ast::visibility) {
     head(s, ~"");
-    print_fn_header_info(s, opt_self_ty, purity, abis, ast::Many, None, vis);
+    print_fn_header_info(s, opt_explicit_self, purity, abis, ast::Many, None, vis);
     nbsp(s);
     print_ident(s, name);
     print_generics(s, generics);
-    print_fn_args_and_ret(s, decl, opt_self_ty);
+    print_fn_args_and_ret(s, decl, opt_explicit_self);
 }
 
 pub fn print_fn_args(s: @ps, decl: &ast::fn_decl,
-                 opt_self_ty: Option<ast::self_ty_>) {
+                 opt_explicit_self: Option<ast::explicit_self_>) {
     // It is unfortunate to duplicate the commasep logic, but we we want the
     // self type and the args all in the same box.
     box(s, 0u, inconsistent);
     let mut first = true;
-    for opt_self_ty.each |self_ty| {
-        first = !print_self_ty(s, *self_ty);
+    for opt_explicit_self.each |explicit_self| {
+        first = !print_explicit_self(s, *explicit_self);
     }
 
     for decl.inputs.each |arg| {
@@ -1686,9 +1686,9 @@ pub fn print_fn_args(s: @ps, decl: &ast::fn_decl,
 }
 
 pub fn print_fn_args_and_ret(s: @ps, decl: &ast::fn_decl,
-                             opt_self_ty: Option<ast::self_ty_>) {
+                             opt_explicit_self: Option<ast::explicit_self_>) {
     popen(s);
-    print_fn_args(s, decl, opt_self_ty);
+    print_fn_args(s, decl, opt_explicit_self);
     pclose(s);
 
     maybe_print_comment(s, decl.output.span.lo);
@@ -1900,7 +1900,7 @@ pub fn print_ty_fn(s: @ps,
                    decl: &ast::fn_decl,
                    id: Option<ast::ident>,
                    generics: Option<&ast::Generics>,
-                   opt_self_ty: Option<ast::self_ty_>) {
+                   opt_explicit_self: Option<ast::explicit_self_>) {
     ibox(s, indent_unit);
 
     // Duplicates the logic in `print_fn_header_info()`.  This is because that
@@ -1920,8 +1920,8 @@ pub fn print_ty_fn(s: @ps,
     // self type and the args all in the same box.
     box(s, 0u, inconsistent);
     let mut first = true;
-    for opt_self_ty.each |self_ty| {
-        first = !print_self_ty(s, *self_ty);
+    for opt_explicit_self.each |explicit_self| {
+        first = !print_explicit_self(s, *explicit_self);
     }
     for decl.inputs.each |arg| {
         if first { first = false; } else { word_space(s, ~","); }
@@ -2163,7 +2163,7 @@ pub fn print_opt_sigil(s: @ps, opt_sigil: Option<ast::Sigil>) {
 }
 
 pub fn print_fn_header_info(s: @ps,
-                            _opt_sty: Option<ast::self_ty_>,
+                            _opt_explicit_self: Option<ast::explicit_self_>,
                             opt_purity: Option<ast::purity>,
                             abis: AbiSet,
                             onceness: ast::Onceness,