From 983569732d24df434c644dd1764e9c5e4ecfd081 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 22 Sep 2019 19:41:04 +0300
Subject: [PATCH] push TokenTree::parse down

---
 src/libsyntax/ext/mbe/macro_rules.rs | 15 ++++++++++++++-
 src/libsyntax/tokenstream.rs         | 15 ---------------
 2 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/src/libsyntax/ext/mbe/macro_rules.rs b/src/libsyntax/ext/mbe/macro_rules.rs
index 2ec171a7fb591..816baadb12fbb 100644
--- a/src/libsyntax/ext/mbe/macro_rules.rs
+++ b/src/libsyntax/ext/mbe/macro_rules.rs
@@ -8,7 +8,7 @@ use crate::ext::mbe;
 use crate::ext::mbe::macro_check;
 use crate::ext::mbe::macro_parser::{parse, parse_failure_msg};
 use crate::ext::mbe::macro_parser::{Error, Failure, Success};
-use crate::ext::mbe::macro_parser::{MatchedNonterminal, MatchedSeq};
+use crate::ext::mbe::macro_parser::{MatchedNonterminal, MatchedSeq, NamedParseResult};
 use crate::ext::mbe::transcribe::transcribe;
 use crate::feature_gate::Features;
 use crate::parse::parser::Parser;
@@ -1171,3 +1171,16 @@ fn quoted_tt_to_string(tt: &mbe::TokenTree) -> String {
         ),
     }
 }
+
+impl TokenTree {
+    /// Use this token tree as a matcher to parse given tts.
+    fn parse(cx: &ExtCtxt<'_>, mtch: &[mbe::TokenTree], tts: TokenStream)
+             -> NamedParseResult {
+        // `None` is because we're not interpolating
+        let directory = Directory {
+            path: Cow::from(cx.current_expansion.module.directory.as_path()),
+            ownership: cx.current_expansion.directory_ownership,
+        };
+        parse(cx.parse_sess(), tts, mtch, Some(directory), true)
+    }
+}
diff --git a/src/libsyntax/tokenstream.rs b/src/libsyntax/tokenstream.rs
index fd87f8a1f678a..26cae2a8e7c42 100644
--- a/src/libsyntax/tokenstream.rs
+++ b/src/libsyntax/tokenstream.rs
@@ -13,9 +13,6 @@
 //! and a borrowed `TokenStream` is sufficient to build an owned `TokenStream` without taking
 //! ownership of the original.
 
-use crate::ext::base;
-use crate::ext::mbe::{self, macro_parser};
-use crate::parse::Directory;
 use crate::parse::token::{self, DelimToken, Token, TokenKind};
 use crate::print::pprust;
 
@@ -26,7 +23,6 @@ use rustc_data_structures::sync::Lrc;
 use rustc_serialize::{Decoder, Decodable, Encoder, Encodable};
 use smallvec::{SmallVec, smallvec};
 
-use std::borrow::Cow;
 use std::{fmt, iter, mem};
 
 #[cfg(test)]
@@ -63,17 +59,6 @@ where
 {}
 
 impl TokenTree {
-    /// Use this token tree as a matcher to parse given tts.
-    crate fn parse(cx: &base::ExtCtxt<'_>, mtch: &[mbe::TokenTree], tts: TokenStream)
-                 -> macro_parser::NamedParseResult {
-        // `None` is because we're not interpolating
-        let directory = Directory {
-            path: Cow::from(cx.current_expansion.module.directory.as_path()),
-            ownership: cx.current_expansion.directory_ownership,
-        };
-        macro_parser::parse(cx.parse_sess(), tts, mtch, Some(directory), true)
-    }
-
     /// Checks if this TokenTree is equal to the other, regardless of span information.
     pub fn eq_unspanned(&self, other: &TokenTree) -> bool {
         match (self, other) {