libproc_macro: Add iterator impl to TokenStream

Add iterator impl functions to the TokenStream rust interface in
libproc_macro.

ChangeLog:

	* librust/proc_macro/rust/lib.rs: Add iterators.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 25 insertions, 1 deletions

diff --git a/librust/proc_macro/rust/lib.rs b/librust/proc_macro/rust/lib.rs
index 2e91dd3..de2ad9d 100644
--- a/librust/proc_macro/rust/lib.rs
+++ b/librust/proc_macro/rust/lib.rs
@@ -4,7 +4,7 @@ pub use literal::Literal;
 pub use punct::{Punct, Spacing};
 pub use span::Span;
 use std::error;
-use std::{fmt, str::FromStr};
+use std::{fmt, iter, str::FromStr};
 
 mod group;
 mod ident;
@@ -140,3 +140,27 @@ impl FromStr for TokenStream {
         todo!("Implement this function")
     }
 }
+
+impl iter::FromIterator<TokenTree> for TokenStream {
+    fn from_iter<I: IntoIterator<Item = TokenTree>>(_trees: I) -> Self {
+        todo!("Implement this function")
+    }
+}
+
+impl iter::FromIterator<TokenStream> for TokenStream {
+    fn from_iter<I: IntoIterator<Item = TokenStream>>(_streams: I) -> Self {
+        todo!("Implement this function")
+    }
+}
+
+impl Extend<TokenTree> for TokenStream {
+    fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, _trees: I) {
+        todo!("Implement this function")
+    }
+}
+
+impl Extend<TokenStream> for TokenStream {
+    fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, _streams: I) {
+        todo!("Implement this function")
+    }
+}