Rollup merge of #35917 - jseyfried:remove_attr_ext_traits, r=nrc

syntax: Remove traits `AttrMetaMethods`, `AttributeMethods`, and `AttrNestedMetaItemMethods`

src/librustc/hir/check_attr.rs

@@ -11,7 +11,6 @@
 use session::Session;
 
 use syntax::ast;
-use syntax::attr::{AttrNestedMetaItemMethods, AttrMetaMethods};
 use syntax::visit;
 use syntax::visit::Visitor;
 

src/librustc/lint/context.rs

@@ -38,7 +38,7 @@ use util::nodemap::FnvHashMap;
 use std::cmp;
 use std::default::Default as StdDefault;
 use std::mem;
-use syntax::attr::{self, AttrMetaMethods, AttrNestedMetaItemMethods};
+use syntax::attr;
 use syntax::parse::token::InternedString;
 use syntax::ast;
 use syntax_pos::Span;

src/librustc/middle/lang_items.rs

@@ -30,7 +30,6 @@ use middle::weak_lang_items;
 use util::nodemap::FnvHashMap;
 
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 use syntax::parse::token::InternedString;
 use hir::intravisit::Visitor;
 use hir;

src/librustc/middle/recursion_limit.rs

@@ -17,7 +17,6 @@
 
 use session::Session;
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 
 pub fn update_recursion_limit(sess: &Session, krate: &ast::Crate) {
     for attr in &krate.attrs {

src/librustc/middle/stability.rs

@@ -27,7 +27,7 @@ use syntax_pos::{Span, DUMMY_SP};
 use syntax::ast;
 use syntax::ast::{NodeId, Attribute};
 use syntax::feature_gate::{GateIssue, emit_feature_err, find_lang_feature_accepted_version};
-use syntax::attr::{self, Stability, Deprecation, AttrMetaMethods};
+use syntax::attr::{self, Stability, Deprecation};
 use util::nodemap::{DefIdMap, FnvHashSet, FnvHashMap};
 
 use hir;

src/librustc/session/config.rs

@@ -25,7 +25,6 @@ use middle::cstore;
 
 use syntax::ast::{self, IntTy, UintTy};
 use syntax::attr;
-use syntax::attr::AttrMetaMethods;
 use syntax::parse;
 use syntax::parse::token::InternedString;
 use syntax::feature_gate::UnstableFeatures;
@@ -1773,8 +1772,9 @@ mod tests {
     use std::path::PathBuf;
     use std::rc::Rc;
     use super::{OutputType, OutputTypes, Externs, PanicStrategy};
-    use syntax::attr;
-    use syntax::attr::AttrMetaMethods;
+    use syntax::{ast, attr};
+    use syntax::parse::token::InternedString;
+    use syntax::codemap::dummy_spanned;
 
     fn optgroups() -> Vec<OptGroup> {
         super::rustc_optgroups().into_iter()
@@ -1803,7 +1803,9 @@ mod tests {
         let (sessopts, cfg) = build_session_options_and_crate_config(matches);
         let sess = build_session(sessopts, &dep_graph, None, registry, Rc::new(DummyCrateStore));
         let cfg = build_configuration(&sess, cfg);
-        assert!((attr::contains_name(&cfg[..], "test")));
+        assert!(attr::contains(&cfg, &dummy_spanned(ast::MetaItemKind::Word({
+            InternedString::new("test")
+        }))));
     }
 
     // When the user supplies --test and --cfg test, don't implicitly add

src/librustc/traits/error_reporting.rs

@@ -37,7 +37,6 @@ use util::nodemap::{FnvHashMap, FnvHashSet};
 use std::cmp;
 use std::fmt;
 use syntax::ast;
-use syntax::attr::{AttributeMethods, AttrMetaMethods};
 use syntax_pos::Span;
 use errors::DiagnosticBuilder;
 

src/librustc/ty/mod.rs

@@ -43,7 +43,7 @@ use std::rc::Rc;
 use std::slice;
 use std::vec::IntoIter;
 use syntax::ast::{self, CrateNum, Name, NodeId};
-use syntax::attr::{self, AttrMetaMethods};
+use syntax::attr;
 use syntax::parse::token::InternedString;
 use syntax_pos::{DUMMY_SP, Span};
 

src/librustc_borrowck/borrowck/fragments.rs

@@ -27,7 +27,6 @@ use rustc::middle::mem_categorization as mc;
 use std::mem;
 use std::rc::Rc;
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 use syntax_pos::{Span, DUMMY_SP};
 
 #[derive(PartialEq, Eq, PartialOrd, Ord)]

src/librustc_borrowck/borrowck/mir/mod.rs

@@ -11,7 +11,6 @@
 use borrowck::BorrowckCtxt;
 
 use syntax::ast::{self, MetaItem};
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax::ptr::P;
 use syntax_pos::{Span, DUMMY_SP};
 
@@ -127,8 +126,6 @@ fn do_dataflow<'a, 'tcx, BD>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                              bd: BD) -> DataflowResults<BD>
     where BD: BitDenotation<Idx=MovePathIndex, Ctxt=MoveDataParamEnv<'tcx>> + DataflowOperator
 {
-    use syntax::attr::AttrMetaMethods;
-
     let name_found = |sess: &Session, attrs: &[ast::Attribute], name| -> Option<String> {
         if let Some(item) = has_rustc_mir_with(attrs, name) {
             if let Some(s) = item.value_str() {

src/librustc_borrowck/borrowck/mod.rs

@@ -43,7 +43,6 @@ use std::mem;
 use std::rc::Rc;
 use std::hash::{Hash, Hasher};
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 use syntax_pos::{MultiSpan, Span};
 use errors::DiagnosticBuilder;
 

src/librustc_driver/driver.rs

@@ -49,7 +49,7 @@ use std::fs;
 use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 use syntax::{ast, diagnostics, visit};
-use syntax::attr::{self, AttrMetaMethods};
+use syntax::attr;
 use syntax::parse::{self, PResult, token};
 use syntax::util::node_count::NodeCounter;
 use syntax;

src/librustc_driver/lib.rs

@@ -95,7 +95,6 @@ use std::thread;
 use rustc::session::early_error;
 
 use syntax::{ast, json};
-use syntax::attr::AttrMetaMethods;
 use syntax::codemap::{CodeMap, FileLoader, RealFileLoader};
 use syntax::feature_gate::{GatedCfg, UnstableFeatures};
 use syntax::parse::{self, PResult};

src/librustc_incremental/assert_dep_graph.rs

@@ -56,7 +56,6 @@ use std::env;
 use std::fs::File;
 use std::io::Write;
 use syntax::ast;
-use syntax::attr::{AttrNestedMetaItemMethods, AttrMetaMethods};
 use syntax::parse::token::InternedString;
 use syntax_pos::Span;
 

src/librustc_incremental/calculate_svh/mod.rs

@@ -28,7 +28,6 @@
 //! at the beginning.
 
 use syntax::ast;
-use syntax::attr::AttributeMethods;
 use std::hash::{Hash, SipHasher, Hasher};
 use rustc::dep_graph::DepNode;
 use rustc::hir;

src/librustc_incremental/persist/dirty_clean.rs

@@ -32,7 +32,6 @@ use rustc::hir::def_id::DefId;
 use rustc::hir::intravisit::Visitor;
 use rustc_data_structures::fnv::FnvHashSet;
 use syntax::ast::{self, Attribute, NestedMetaItem};
-use syntax::attr::{AttrNestedMetaItemMethods, AttrMetaMethods};
 use syntax::parse::token::InternedString;
 use rustc::ty::TyCtxt;
 

src/librustc_lint/bad_style.rs

@@ -14,7 +14,7 @@ use lint::{LateContext, LintContext, LintArray};
 use lint::{LintPass, LateLintPass};
 
 use syntax::ast;
-use syntax::attr::{self, AttrMetaMethods};
+use syntax::attr;
 use syntax_pos::Span;
 
 use rustc::hir::{self, PatKind};

src/librustc_lint/builtin.rs

@@ -44,7 +44,7 @@ use lint::{LintPass, LateLintPass};
 use std::collections::HashSet;
 
 use syntax::{ast};
-use syntax::attr::{self, AttrMetaMethods, AttrNestedMetaItemMethods, AttributeMethods};
+use syntax::attr;
 use syntax_pos::{Span};
 
 use rustc::hir::{self, PatKind};
@@ -1145,7 +1145,7 @@ impl LintPass for UnstableFeatures {
 
 impl LateLintPass for UnstableFeatures {
     fn check_attribute(&mut self, ctx: &LateContext, attr: &ast::Attribute) {
-        if attr::contains_name(&[attr.meta().clone()], "feature") {
+        if attr.meta().check_name("feature") {
             if let Some(items) = attr.meta().meta_item_list() {
                 for item in items {
                     ctx.span_lint(UNSTABLE_FEATURES, item.span(), "unstable feature");

src/librustc_lint/unused.rs

@@ -18,7 +18,7 @@ use lint::{LintPass, EarlyLintPass, LateLintPass};
 use std::collections::hash_map::Entry::{Occupied, Vacant};
 
 use syntax::ast;
-use syntax::attr::{self, AttrMetaMethods};
+use syntax::attr;
 use syntax::feature_gate::{KNOWN_ATTRIBUTES, AttributeType};
 use syntax::parse::token::keywords;
 use syntax::ptr::P;

src/librustc_metadata/creader.rs

@@ -35,7 +35,7 @@ use syntax::ast;
 use syntax::abi::Abi;
 use syntax::codemap;
 use syntax::parse;
-use syntax::attr::{self, AttrMetaMethods, AttrNestedMetaItemMethods};
+use syntax::attr;
 use syntax::parse::token::InternedString;
 use syntax::visit;
 use syntax_pos::{self, Span, mk_sp, Pos};

src/librustc_metadata/macro_import.rs

@@ -18,7 +18,7 @@ use rustc::session::Session;
 use std::collections::{HashSet, HashMap};
 use syntax::parse::token;
 use syntax::ast;
-use syntax::attr::{self, AttrNestedMetaItemMethods, AttrMetaMethods};
+use syntax::attr;
 use syntax::ext;
 use syntax_pos::Span;
 

src/librustc_mir/hair/cx/mod.rs

@@ -32,7 +32,6 @@ use rustc::ty::{self, Ty, TyCtxt};
 use syntax::parse::token;
 use rustc::hir;
 use rustc_const_math::{ConstInt, ConstUsize};
-use syntax::attr::AttrMetaMethods;
 
 #[derive(Copy, Clone)]
 pub struct Cx<'a, 'gcx: 'a+'tcx, 'tcx: 'a> {

src/librustc_plugin/load.rs

@@ -20,7 +20,6 @@ use std::env;
 use std::mem;
 use std::path::PathBuf;
 use syntax::ast;
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax_pos::{Span, COMMAND_LINE_SP};
 
 /// Pointer to a registrar function.

src/librustc_trans/assert_module_sources.rs

@@ -29,7 +29,6 @@
 
 use rustc::ty::TyCtxt;
 use syntax::ast;
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax::parse::token::InternedString;
 
 use {ModuleSource, ModuleTranslation};

src/librustc_trans/back/link.rs

@@ -42,7 +42,6 @@ use std::process::Command;
 use std::str;
 use flate;
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 use syntax_pos::Span;
 
 // RLIB LLVM-BYTECODE OBJECT LAYOUT

src/librustc_trans/base.rs

@@ -93,7 +93,6 @@ use std::rc::Rc;
 use std::str;
 use std::i32;
 use syntax_pos::{Span, DUMMY_SP};
-use syntax::attr::AttrMetaMethods;
 use syntax::attr;
 use rustc::hir;
 use syntax::ast;

src/librustc_trans/consts.rs

@@ -29,7 +29,7 @@ use rustc::hir;
 
 use std::ffi::{CStr, CString};
 use syntax::ast;
-use syntax::attr::{self, AttrMetaMethods};
+use syntax::attr;
 use syntax::parse::token;
 
 pub fn ptrcast(val: ValueRef, ty: Type) -> ValueRef {

src/librustc_trans/symbol_names_test.rs

@@ -17,7 +17,6 @@
 use rustc::hir;
 use rustc::hir::intravisit::{self, Visitor};
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 
 use common::SharedCrateContext;
 use monomorphize::Instance;

src/librustc_typeck/check/mod.rs

@@ -113,7 +113,6 @@ use std::ops::Deref;
 use syntax::abi::Abi;
 use syntax::ast;
 use syntax::attr;
-use syntax::attr::AttrMetaMethods;
 use syntax::codemap::{self, Spanned};
 use syntax::feature_gate::{GateIssue, emit_feature_err};
 use syntax::parse::token::{self, InternedString, keywords};

src/librustdoc/clean/mod.rs

@@ -26,9 +26,8 @@ pub use self::Visibility::*;
 use syntax::abi::Abi;
 use syntax::ast;
 use syntax::attr;
-use syntax::attr::{AttributeMethods, AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax::codemap::Spanned;
-use syntax::parse::token::{self, InternedString, keywords};
+use syntax::parse::token::keywords;
 use syntax::ptr::P;
 use syntax::print::pprust as syntax_pprust;
 use syntax_pos::{self, DUMMY_SP, Pos};
@@ -541,62 +540,6 @@ impl Clean<Attribute> for ast::Attribute {
     }
 }
 
-// This is a rough approximation that gets us what we want.
-impl attr::AttrNestedMetaItemMethods for Attribute {
-    fn check_name(&self, name: &str) -> bool {
-        self.name().map_or(false, |mi_name| &*mi_name == name)
-    }
-
-    fn literal(&self) -> Option<&ast::Lit> { None }
-
-    fn is_literal(&self) -> bool {
-      match *self {
-        Literal(..) => true,
-        _ => false,
-      }
-    }
-
-    fn meta_item(&self) -> Option<&P<ast::MetaItem>> { None }
-
-    fn name(&self) -> Option<InternedString> {
-        match *self {
-            Word(ref n) | List(ref n, _) | NameValue(ref n, _) => {
-                Some(token::intern_and_get_ident(n))
-            },
-            _ => None
-        }
-    }
-
-    fn value_str(&self) -> Option<InternedString> {
-        match *self {
-            NameValue(_, ref v) => {
-                Some(token::intern_and_get_ident(v))
-            }
-            _ => None,
-        }
-    }
-
-    fn word(&self) -> Option<&P<ast::MetaItem>> { None }
-
-    fn is_word(&self) -> bool {
-      match *self {
-        Word(_) => true,
-        _ => false,
-      }
-    }
-
-    fn meta_item_list<'a>(&'a self) -> Option<&'a [ast::NestedMetaItem]> { None }
-
-    fn is_meta_item_list(&self) -> bool {
-      match *self {
-        List(..) => true,
-        _ => false,
-      }
-    }
-
-    fn span(&self) -> syntax_pos::Span { unimplemented!() }
-}
-
 #[derive(Clone, RustcEncodable, RustcDecodable, PartialEq, Debug)]
 pub struct TyParam {
     pub name: String,

src/librustdoc/test.rs

@@ -140,8 +140,6 @@ pub fn run(input: &str,
 
 // Look for #![doc(test(no_crate_inject))], used by crates in the std facade
 fn scrape_test_config(krate: &::rustc::hir::Crate) -> TestOptions {
-    use syntax::attr::AttrMetaMethods;
-    use syntax::attr::AttrNestedMetaItemMethods;
     use syntax::print::pprust;
 
     let mut opts = TestOptions {

src/librustdoc/visit_ast.rs

@@ -17,7 +17,6 @@ use std::mem;
 use syntax::abi;
 use syntax::ast;
 use syntax::attr;
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax_pos::Span;
 
 use rustc::hir::map as hir_map;

src/libsyntax/attr.rs

@@ -81,32 +81,47 @@ pub fn is_used(attr: &Attribute) -> bool {
     })
 }
 
-pub trait AttrNestedMetaItemMethods {
+impl NestedMetaItem {
+    /// Returns the MetaItem if self is a NestedMetaItemKind::MetaItem.
+    pub fn meta_item(&self) -> Option<&P<MetaItem>> {
+        match self.node {
+            NestedMetaItemKind::MetaItem(ref item) => Some(&item),
+            _ => None
+        }
+    }
+
+    /// Returns the Lit if self is a NestedMetaItemKind::Literal.
+    pub fn literal(&self) -> Option<&Lit> {
+        match self.node {
+            NestedMetaItemKind::Literal(ref lit) => Some(&lit),
+            _ => None
+        }
+    }
+
+    /// Returns the Span for `self`.
+    pub fn span(&self) -> Span {
+        self.span
+    }
+
     /// Returns true if this list item is a MetaItem with a name of `name`.
-    fn check_name(&self, name: &str) -> bool {
+    pub fn check_name(&self, name: &str) -> bool {
         self.meta_item().map_or(false, |meta_item| meta_item.check_name(name))
     }
 
     /// Returns the name of the meta item, e.g. `foo` in `#[foo]`,
     /// `#[foo="bar"]` and `#[foo(bar)]`, if self is a MetaItem
-    fn name(&self) -> Option<InternedString> {
+    pub fn name(&self) -> Option<InternedString> {
         self.meta_item().and_then(|meta_item| Some(meta_item.name()))
     }
 
-    /// Returns the MetaItem if self is a NestedMetaItemKind::MetaItem.
-    fn meta_item(&self) -> Option<&P<MetaItem>>;
-
-    /// Returns the Lit if self is a NestedMetaItemKind::Literal.
-    fn literal(&self) -> Option<&Lit>;
-
     /// Gets the string value if self is a MetaItem and the MetaItem is a
     /// MetaItemKind::NameValue variant containing a string, otherwise None.
-    fn value_str(&self) -> Option<InternedString> {
+    pub fn value_str(&self) -> Option<InternedString> {
         self.meta_item().and_then(|meta_item| meta_item.value_str())
     }
 
     /// Returns a MetaItem if self is a MetaItem with Kind Word.
-    fn word(&self) -> Option<&P<MetaItem>> {
+    pub fn word(&self) -> Option<&P<MetaItem>> {
         self.meta_item().and_then(|meta_item| if meta_item.is_word() {
             Some(meta_item)
         } else {
@@ -115,93 +130,38 @@ pub trait AttrNestedMetaItemMethods {
     }
 
     /// Gets a list of inner meta items from a list MetaItem type.
-    fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
+    pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
         self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
     }
 
     /// Returns `true` if the variant is MetaItem.
-    fn is_meta_item(&self) -> bool {
+    pub fn is_meta_item(&self) -> bool {
         self.meta_item().is_some()
     }
 
     /// Returns `true` if the variant is Literal.
-    fn is_literal(&self) -> bool {
+    pub fn is_literal(&self) -> bool {
         self.literal().is_some()
     }
 
     /// Returns `true` if self is a MetaItem and the meta item is a word.
-    fn is_word(&self) -> bool {
+    pub fn is_word(&self) -> bool {
         self.word().is_some()
     }
 
     /// Returns `true` if self is a MetaItem and the meta item is a ValueString.
-    fn is_value_str(&self) -> bool {
+    pub fn is_value_str(&self) -> bool {
         self.value_str().is_some()
     }
 
     /// Returns `true` if self is a MetaItem and the meta item is a list.
-    fn is_meta_item_list(&self) -> bool {
+    pub fn is_meta_item_list(&self) -> bool {
         self.meta_item_list().is_some()
     }
-
-    /// Returns the Span for `self`.
-    fn span(&self) -> Span;
 }
 
-impl AttrNestedMetaItemMethods for NestedMetaItem {
-    fn meta_item(&self) -> Option<&P<MetaItem>> {
-        match self.node {
-            NestedMetaItemKind::MetaItem(ref item) => Some(&item),
-            _ => None
-        }
-    }
-
-    fn literal(&self) -> Option<&Lit> {
-        match self.node {
-            NestedMetaItemKind::Literal(ref lit) => Some(&lit),
-            _ => None
-        }
-    }
-
-    fn span(&self) -> Span {
-        self.span
-    }
-}
-
-pub trait AttrMetaMethods {
-    fn check_name(&self, name: &str) -> bool {
-        name == &self.name()[..]
-    }
-
-    /// Retrieve the name of the meta item, e.g. `foo` in `#[foo]`,
-    /// `#[foo="bar"]` and `#[foo(bar)]`
-    fn name(&self) -> InternedString;
-
-    /// Gets the string value if self is a MetaItemKind::NameValue variant
-    /// containing a string, otherwise None.
-    fn value_str(&self) -> Option<InternedString>;
-
-    /// Gets a list of inner meta items from a list MetaItem type.
-    fn meta_item_list(&self) -> Option<&[NestedMetaItem]>;
-
-    /// Indicates if the attribute is a Word.
-    fn is_word(&self) -> bool;
-
-    /// Indicates if the attribute is a Value String.
-    fn is_value_str(&self) -> bool {
-        self.value_str().is_some()
-    }
-
-    /// Indicates if the attribute is a Meta-Item List.
-    fn is_meta_item_list(&self) -> bool {
-        self.meta_item_list().is_some()
-    }
-
-    fn span(&self) -> Span;
-}
-
-impl AttrMetaMethods for Attribute {
-    fn check_name(&self, name: &str) -> bool {
+impl Attribute {
+    pub fn check_name(&self, name: &str) -> bool {
         let matches = name == &self.name()[..];
         if matches {
             mark_used(self);
@@ -209,23 +169,32 @@ impl AttrMetaMethods for Attribute {
         matches
     }
 
-    fn name(&self) -> InternedString { self.meta().name() }
+    pub fn name(&self) -> InternedString { self.meta().name() }
 
-    fn value_str(&self) -> Option<InternedString> {
+    pub fn value_str(&self) -> Option<InternedString> {
         self.meta().value_str()
     }
 
-    fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
+    pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
         self.meta().meta_item_list()
     }
 
-    fn is_word(&self) -> bool { self.meta().is_word() }
+    pub fn is_word(&self) -> bool { self.meta().is_word() }
 
-    fn span(&self) -> Span { self.meta().span }
+    pub fn span(&self) -> Span { self.meta().span }
+
+    pub fn is_meta_item_list(&self) -> bool {
+        self.meta_item_list().is_some()
+    }
+
+    /// Indicates if the attribute is a Value String.
+    pub fn is_value_str(&self) -> bool {
+        self.value_str().is_some()
+    }
 }
 
-impl AttrMetaMethods for MetaItem {
-    fn name(&self) -> InternedString {
+impl MetaItem {
+    pub fn name(&self) -> InternedString {
         match self.node {
             MetaItemKind::Word(ref n) => (*n).clone(),
             MetaItemKind::NameValue(ref n, _) => (*n).clone(),
@@ -233,7 +202,7 @@ impl AttrMetaMethods for MetaItem {
         }
     }
 
-    fn value_str(&self) -> Option<InternedString> {
+    pub fn value_str(&self) -> Option<InternedString> {
         match self.node {
             MetaItemKind::NameValue(_, ref v) => {
                 match v.node {
@@ -245,53 +214,45 @@ impl AttrMetaMethods for MetaItem {
         }
     }
 
-    fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
+    pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
         match self.node {
             MetaItemKind::List(_, ref l) => Some(&l[..]),
             _ => None
         }
     }
 
-    fn is_word(&self) -> bool {
+    pub fn is_word(&self) -> bool {
         match self.node {
             MetaItemKind::Word(_) => true,
             _ => false,
         }
     }
 
-    fn span(&self) -> Span { self.span }
-}
+    pub fn span(&self) -> Span { self.span }
 
-// Annoying, but required to get test_cfg to work
-impl AttrMetaMethods for P<MetaItem> {
-    fn name(&self) -> InternedString { (**self).name() }
-    fn value_str(&self) -> Option<InternedString> { (**self).value_str() }
-    fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
-        (**self).meta_item_list()
+    pub fn check_name(&self, name: &str) -> bool {
+        name == &self.name()[..]
+    }
+
+    pub fn is_value_str(&self) -> bool {
+        self.value_str().is_some()
+    }
+
+    pub fn is_meta_item_list(&self) -> bool {
+        self.meta_item_list().is_some()
     }
-    fn is_word(&self) -> bool { (**self).is_word() }
-    fn is_value_str(&self) -> bool { (**self).is_value_str() }
-    fn is_meta_item_list(&self) -> bool { (**self).is_meta_item_list() }
-    fn span(&self) -> Span { (**self).span() }
 }
 
-
-pub trait AttributeMethods {
-    fn meta(&self) -> &MetaItem;
-    fn with_desugared_doc<T, F>(&self, f: F) -> T where
-        F: FnOnce(&Attribute) -> T;
-}
-
-impl AttributeMethods for Attribute {
+impl Attribute {
     /// Extract the MetaItem from inside this Attribute.
-    fn meta(&self) -> &MetaItem {
+    pub fn meta(&self) -> &MetaItem {
         &self.node.value
     }
 
     /// Convert self to a normal #[doc="foo"] comment, if it is a
     /// comment like `///` or `/** */`. (Returns self unchanged for
     /// non-sugared doc attributes.)
-    fn with_desugared_doc<T, F>(&self, f: F) -> T where
+    pub fn with_desugared_doc<T, F>(&self, f: F) -> T where
         F: FnOnce(&Attribute) -> T,
     {
         if self.node.is_sugared_doc {
@@ -431,7 +392,7 @@ pub fn contains(haystack: &[P<MetaItem>], needle: &MetaItem) -> bool {
     })
 }
 
-pub fn list_contains_name<AM: AttrNestedMetaItemMethods>(items: &[AM], name: &str) -> bool {
+pub fn list_contains_name(items: &[NestedMetaItem], name: &str) -> bool {
     debug!("attr::list_contains_name (name={})", name);
     items.iter().any(|item| {
         debug!("  testing: {:?}", item.name());
@@ -439,9 +400,9 @@ pub fn list_contains_name<AM: AttrNestedMetaItemMethods>(items: &[AM], name: &st
     })
 }
 
-pub fn contains_name<AM: AttrMetaMethods>(metas: &[AM], name: &str) -> bool {
+pub fn contains_name(attrs: &[Attribute], name: &str) -> bool {
     debug!("attr::contains_name (name={})", name);
-    metas.iter().any(|item| {
+    attrs.iter().any(|item| {
         debug!("  testing: {}", item.name());
         item.check_name(name)
     })

src/libsyntax/config.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use attr::{AttrMetaMethods, AttrNestedMetaItemMethods, HasAttrs};
+use attr::HasAttrs;
 use feature_gate::{emit_feature_err, EXPLAIN_STMT_ATTR_SYNTAX, Features, get_features, GateIssue};
 use fold::Folder;
 use {fold, attr};

src/libsyntax/ext/expand.rs

@@ -13,7 +13,6 @@ use ast::{MacStmtStyle, Stmt, StmtKind, ItemKind};
 use ast;
 use ext::hygiene::Mark;
 use attr::{self, HasAttrs};
-use attr::AttrMetaMethods;
 use codemap::{dummy_spanned, ExpnInfo, NameAndSpan, MacroBang, MacroAttribute};
 use syntax_pos::{self, Span, ExpnId};
 use config::StripUnconfigured;

src/libsyntax/feature_gate.rs

@@ -27,7 +27,7 @@ use self::AttributeGate::*;
 
 use abi::Abi;
 use ast::{self, NodeId, PatKind};
-use attr::{self, AttrMetaMethods, AttrNestedMetaItemMethods};
+use attr;
 use codemap::{CodeMap, Spanned};
 use syntax_pos::Span;
 use errors::Handler;

src/libsyntax/parse/mod.rs

@@ -678,7 +678,7 @@ mod tests {
     use codemap::Spanned;
     use ast::{self, PatKind};
     use abi::Abi;
-    use attr::{first_attr_value_str_by_name, AttrMetaMethods};
+    use attr::first_attr_value_str_by_name;
     use parse;
     use parse::parser::Parser;
     use parse::token::{str_to_ident};

src/libsyntax/print/pprust.rs

@@ -16,7 +16,6 @@ use ast::{SelfKind, RegionTyParamBound, TraitTyParamBound, TraitBoundModifier};
 use ast::Attribute;
 use util::parser::AssocOp;
 use attr;
-use attr::{AttrMetaMethods, AttributeMethods};
 use codemap::{self, CodeMap};
 use syntax_pos::{self, BytePos};
 use errors;

src/libsyntax/test.rs

@@ -19,7 +19,7 @@ use std::iter;
 use std::slice;
 use std::mem;
 use std::vec;
-use attr::{self, AttrMetaMethods, AttrNestedMetaItemMethods};
+use attr;
 use syntax_pos::{self, DUMMY_SP, NO_EXPANSION, Span, FileMap, BytePos};
 use std::rc::Rc;
 

src/libsyntax_ext/deriving/generic/mod.rs

@@ -194,7 +194,6 @@ use std::vec;
 use syntax::abi::Abi;
 use syntax::ast::{self, BinOpKind, EnumDef, Expr, Generics, Ident, PatKind, VariantData};
 use syntax::attr;
-use syntax::attr::AttrMetaMethods;
 use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ext::build::AstBuilder;
 use syntax::codemap::{self, dummy_spanned, respan};

src/libsyntax_ext/deriving/mod.rs

@@ -11,7 +11,6 @@
 //! The compiler code necessary to implement the `#[derive]` extensions.
 
 use syntax::ast::{self, MetaItem};
-use syntax::attr::{AttrNestedMetaItemMethods, AttrMetaMethods};
 use syntax::ext::base::{Annotatable, ExtCtxt, SyntaxEnv};
 use syntax::ext::base::{MultiDecorator, MultiItemDecorator, MultiModifier};
 use syntax::ext::build::AstBuilder;

src/test/compile-fail-fulldeps/auxiliary/macro_crate_test.rs

@@ -18,7 +18,6 @@ extern crate rustc;
 extern crate rustc_plugin;
 
 use syntax::ast::{self, Item, MetaItem, ItemKind};
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax::ext::base::*;
 use syntax::parse::{self, token};
 use syntax::ptr::P;

src/test/run-pass-fulldeps/auxiliary/custom_derive_plugin_attr.rs

@@ -21,7 +21,6 @@ extern crate rustc;
 extern crate rustc_plugin;
 
 use syntax::ast;
-use syntax::attr::AttrMetaMethods;
 use syntax::ext::base::{MultiDecorator, ExtCtxt, Annotatable};
 use syntax::ext::build::AstBuilder;
 use syntax::parse::token;

src/test/run-pass-fulldeps/auxiliary/macro_crate_test.rs

@@ -19,7 +19,6 @@ extern crate syntax_pos;
 
 use syntax::ast::{self, Item, MetaItem, ItemKind};
 use syntax::codemap::DUMMY_SP;
-use syntax::attr::{AttrMetaMethods, AttrNestedMetaItemMethods};
 use syntax::ext::base::*;
 use syntax::ext::quote::rt::ToTokens;
 use syntax::parse::{self, token};