Delete unnecessary ParserAttr trait.

src/libsyntax/ext/cfg.rs

@@ -19,7 +19,6 @@ use ext::base;
 use ext::build::AstBuilder;
 use attr;
 use attr::*;
-use parse::attr::ParserAttr;
 use parse::token;
 
 pub fn expand_cfg<'cx>(cx: &mut ExtCtxt,

src/libsyntax/ext/tt/macro_parser.rs

@@ -85,7 +85,6 @@ use codemap::{BytePos, mk_sp, Span};
 use codemap;
 use parse::lexer::*; //resolve bug?
 use parse::ParseSess;
-use parse::attr::ParserAttr;
 use parse::parser::{LifetimeAndTypesWithoutColons, Parser};
 use parse::token::{Eof, DocComment, MatchNt, SubstNt};
 use parse::token::{Token, Nonterminal};

src/libsyntax/parse/attr.rs

@@ -16,19 +16,9 @@ use parse::token;
 use parse::parser::{Parser, TokenType};
 use ptr::P;
 
-/// A parser that can parse attributes.
-pub trait ParserAttr {
-    fn parse_outer_attributes(&mut self) -> Vec<ast::Attribute>;
-    fn parse_inner_attributes(&mut self) -> Vec<ast::Attribute>;
-    fn parse_attribute(&mut self, permit_inner: bool) -> ast::Attribute;
-    fn parse_meta_item(&mut self) -> P<ast::MetaItem>;
-    fn parse_meta_seq(&mut self) -> Vec<P<ast::MetaItem>>;
-    fn parse_optional_meta(&mut self) -> Vec<P<ast::MetaItem>>;
-}
-
-impl<'a> ParserAttr for Parser<'a> {
+impl<'a> Parser<'a> {
     /// Parse attributes that appear before an item
-    fn parse_outer_attributes(&mut self) -> Vec<ast::Attribute> {
+    pub fn parse_outer_attributes(&mut self) -> Vec<ast::Attribute> {
         let mut attrs: Vec<ast::Attribute> = Vec::new();
         loop {
             debug!("parse_outer_attributes: self.token={:?}",
@@ -120,7 +110,7 @@ impl<'a> ParserAttr for Parser<'a> {
     /// terminated by a semicolon.
 
     /// matches inner_attrs*
-    fn parse_inner_attributes(&mut self) -> Vec<ast::Attribute> {
+    pub fn parse_inner_attributes(&mut self) -> Vec<ast::Attribute> {
         let mut attrs: Vec<ast::Attribute> = vec![];
         loop {
             match self.token {
@@ -155,7 +145,7 @@ impl<'a> ParserAttr for Parser<'a> {
     /// matches meta_item = IDENT
     /// | IDENT = lit
     /// | IDENT meta_seq
-    fn parse_meta_item(&mut self) -> P<ast::MetaItem> {
+    pub fn parse_meta_item(&mut self) -> P<ast::MetaItem> {
         let nt_meta = match self.token {
             token::Interpolated(token::NtMeta(ref e)) => {
                 Some(e.clone())
@@ -210,11 +200,4 @@ impl<'a> ParserAttr for Parser<'a> {
                        seq_sep_trailing_allowed(token::Comma),
                        |p| Ok(p.parse_meta_item()))).node
     }
-
-    fn parse_optional_meta(&mut self) -> Vec<P<ast::MetaItem>> {
-        match self.token {
-            token::OpenDelim(token::Paren) => self.parse_meta_seq(),
-            _ => Vec::new()
-        }
-    }
 }

src/libsyntax/parse/mod.rs

@@ -13,7 +13,6 @@
 use ast;
 use codemap::{self, Span, CodeMap, FileMap};
 use diagnostic::{SpanHandler, Handler, Auto, FatalError};
-use parse::attr::ParserAttr;
 use parse::parser::Parser;
 use parse::token::InternedString;
 use ptr::P;

src/libsyntax/parse/parser.rs

@@ -64,7 +64,6 @@ use codemap::{self, Span, BytePos, Spanned, spanned, mk_sp, CodeMap};
 use diagnostic;
 use ext::tt::macro_parser;
 use parse;
-use parse::attr::ParserAttr;
 use parse::classify;
 use parse::common::{SeqSep, seq_sep_none, seq_sep_trailing_allowed};
 use parse::lexer::{Reader, TokenAndSpan};