}
/// Collects a number of token trees into a single stream.
-impl iter::FromIterator<TokenTree> for TokenStream {
+impl FromIterator<TokenTree> for TokenStream {
fn from_iter<I: IntoIterator<Item = TokenTree>>(trees: I) -> Self {
trees.into_iter().map(TokenStream::from).collect()
}
/// A "flattening" operation on token streams, collects token trees
/// from multiple token streams into a single stream.
-impl iter::FromIterator<TokenStream> for TokenStream {
+impl FromIterator<TokenStream> for TokenStream {
fn from_iter<I: IntoIterator<Item = TokenStream>>(streams: I) -> Self {
let iter = streams.into_iter();
let mut builder = ConcatStreamsHelper::new(iter.size_hint().0);