1 files changed, 19 insertions(+), 8 deletions(-)

M src/token_builder.rs

@@ 1,3 1,5 @@
+use std::str::FromStr;
+
 use proc_macro2::{Delimiter, Group, Ident, Literal, Punct, TokenStream, TokenTree};
 
 pub trait TokenBuilderExtend {


@@ 122,10 124,14 @@ impl TokenBuilder {
         let mut between_delimiter_matches = what.split(is_delimiter);
 
         if let Some(first_match_no_delimiter) = between_delimiter_matches.next() {
-            let ts = first_match_no_delimiter.parse::<TokenStream>().expect(&format!(
-                "Could not parse the following string into a token stream: {}",
-                first_match_no_delimiter
-            ));
+            let ts = if first_match_no_delimiter.trim().is_empty() {
+                TokenStream::new()
+            } else {
+                proc_macro2::TokenStream::from_str(first_match_no_delimiter).expect(&format!(
+                    "Could not parse the following string into a token stream: bye {}",
+                    first_match_no_delimiter
+                ))
+            };
             self.extend(&ts);
         }
 


@@ 139,10 145,15 @@ impl TokenBuilder {
                 "]" => self.pop_group(Delimiter::Bracket),
                 _ => unreachable!(),
             }
-            let ts = ts.parse::<TokenStream>().expect(&format!(
-                "Could not parse the following string into a token stream: {}",
-                ts
-            ));
+            let ts = if ts.trim().is_empty() {
+                TokenStream::new()
+            } else {
+                proc_macro2::TokenStream::from_str(ts).expect(&format!(
+                    "Could not parse the following string into a token stream: hello {}",
+                    ts
+                ))
+            };
+
             self.extend(&ts);
         }
     }