1 files changed, 45 insertions, 18 deletions

diff --git a/vendor/proc-macro2/src/lib.rs b/vendor/proc-macro2/src/lib.rs
index 6adf71a19..3fda02d5c 100644
--- a/vendor/proc-macro2/src/lib.rs
+++ b/vendor/proc-macro2/src/lib.rs
@@ -86,8 +86,11 @@
 //! a different thread.
 
 // Proc-macro2 types in rustdoc of other crates get linked to here.
-#![doc(html_root_url = "https://docs.rs/proc-macro2/1.0.40")]
-#![cfg_attr(any(proc_macro_span, super_unstable), feature(proc_macro_span))]
+#![doc(html_root_url = "https://docs.rs/proc-macro2/1.0.47")]
+#![cfg_attr(
+    any(proc_macro_span, super_unstable),
+    feature(proc_macro_span, proc_macro_span_shrink)
+)]
 #![cfg_attr(super_unstable, feature(proc_macro_def_site))]
 #![cfg_attr(doc_cfg, feature(doc_cfg))]
 #![allow(
@@ -120,6 +123,7 @@ extern crate proc_macro;
 
 mod marker;
 mod parse;
+mod rcvec;
 
 #[cfg(wrap_proc_macro)]
 mod detection;
@@ -136,15 +140,15 @@ use crate::fallback as imp;
 mod imp;
 
 use crate::marker::Marker;
-use std::cmp::Ordering;
+use core::cmp::Ordering;
+use core::fmt::{self, Debug, Display};
+use core::hash::{Hash, Hasher};
+use core::iter::FromIterator;
+use core::ops::RangeBounds;
+use core::str::FromStr;
 use std::error::Error;
-use std::fmt::{self, Debug, Display};
-use std::hash::{Hash, Hasher};
-use std::iter::FromIterator;
-use std::ops::RangeBounds;
 #[cfg(procmacro2_semver_exempt)]
 use std::path::PathBuf;
-use std::str::FromStr;
 
 /// An abstract stream of tokens, or more concretely a sequence of token trees.
 ///
@@ -508,6 +512,24 @@ impl Span {
         LineColumn { line, column }
     }
 
+    /// Creates an empty span pointing to directly before this span.
+    ///
+    /// This method is semver exempt and not exposed by default.
+    #[cfg(all(procmacro2_semver_exempt, any(not(wrap_proc_macro), super_unstable)))]
+    #[cfg_attr(doc_cfg, doc(cfg(procmacro2_semver_exempt)))]
+    pub fn before(&self) -> Span {
+        Span::_new(self.inner.before())
+    }
+
+    /// Creates an empty span pointing to directly after this span.
+    ///
+    /// This method is semver exempt and not exposed by default.
+    #[cfg(all(procmacro2_semver_exempt, any(not(wrap_proc_macro), super_unstable)))]
+    #[cfg_attr(doc_cfg, doc(cfg(procmacro2_semver_exempt)))]
+    pub fn after(&self) -> Span {
+        Span::_new(self.inner.after())
+    }
+
     /// Create a new span encompassing `self` and `other`.
     ///
     /// Returns `None` if `self` and `other` are from different files.
@@ -1128,9 +1150,9 @@ impl Literal {
     /// This constructor is similar to those like `Literal::i8_unsuffixed` where
     /// the float's value is emitted directly into the token but no suffix is
     /// used, so it may be inferred to be a `f64` later in the compiler.
-    /// Literals created from negative numbers may not survive rountrips through
-    /// `TokenStream` or strings and may be broken into two tokens (`-` and
-    /// positive literal).
+    /// Literals created from negative numbers may not survive round-trips
+    /// through `TokenStream` or strings and may be broken into two tokens (`-`
+    /// and positive literal).
     ///
     /// # Panics
     ///
@@ -1147,7 +1169,7 @@ impl Literal {
     /// specified is the preceding part of the token and `f64` is the suffix of
     /// the token. This token will always be inferred to be an `f64` in the
     /// compiler. Literals created from negative numbers may not survive
-    /// rountrips through `TokenStream` or strings and may be broken into two
+    /// round-trips through `TokenStream` or strings and may be broken into two
     /// tokens (`-` and positive literal).
     ///
     /// # Panics
@@ -1164,9 +1186,9 @@ impl Literal {
     /// This constructor is similar to those like `Literal::i8_unsuffixed` where
     /// the float's value is emitted directly into the token but no suffix is
     /// used, so it may be inferred to be a `f64` later in the compiler.
-    /// Literals created from negative numbers may not survive rountrips through
-    /// `TokenStream` or strings and may be broken into two tokens (`-` and
-    /// positive literal).
+    /// Literals created from negative numbers may not survive round-trips
+    /// through `TokenStream` or strings and may be broken into two tokens (`-`
+    /// and positive literal).
     ///
     /// # Panics
     ///
@@ -1183,7 +1205,7 @@ impl Literal {
     /// specified is the preceding part of the token and `f32` is the suffix of
     /// the token. This token will always be inferred to be an `f32` in the
     /// compiler. Literals created from negative numbers may not survive
-    /// rountrips through `TokenStream` or strings and may be broken into two
+    /// round-trips through `TokenStream` or strings and may be broken into two
     /// tokens (`-` and positive literal).
     ///
     /// # Panics
@@ -1270,7 +1292,7 @@ impl Display for Literal {
 pub mod token_stream {
     use crate::marker::Marker;
     use crate::{imp, TokenTree};
-    use std::fmt::{self, Debug};
+    use core::fmt::{self, Debug};
 
     pub use crate::TokenStream;
 
@@ -1290,11 +1312,16 @@ pub mod token_stream {
         fn next(&mut self) -> Option<TokenTree> {
             self.inner.next()
         }
+
+        fn size_hint(&self) -> (usize, Option<usize>) {
+            self.inner.size_hint()
+        }
     }
 
     impl Debug for IntoIter {
         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-            Debug::fmt(&self.inner, f)
+            f.write_str("TokenStream ")?;
+            f.debug_list().entries(self.clone()).finish()
         }
     }