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| author | Mark Mansi <markm@cs.wisc.edu> | 2019-05-08 13:34:23 -0500 |
|---|---|---|
| committer | Mark Mansi <markm@cs.wisc.edu> | 2019-05-08 13:34:23 -0500 |
| commit | eb7d47cba90ac716c84fe720418e58c6eb84ac4e (patch) | |
| tree | e4d4ba7c8ec3636e2bcaee161bfbb554a9fd8005 /src/libsyntax/ext | |
| parent | 5db665b972f7c9578fe0fd2bdb9c7aef6f6db3db (diff) | |
| download | rust-eb7d47cba90ac716c84fe720418e58c6eb84ac4e.tar.gz rust-eb7d47cba90ac716c84fe720418e58c6eb84ac4e.zip | |
fix incorrect assert
Diffstat (limited to 'src/libsyntax/ext')
| -rw-r--r-- | src/libsyntax/ext/tt/transcribe.rs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/libsyntax/ext/tt/transcribe.rs b/src/libsyntax/ext/tt/transcribe.rs index 3a40e8403cc..0cefcf1ce03 100644 --- a/src/libsyntax/ext/tt/transcribe.rs +++ b/src/libsyntax/ext/tt/transcribe.rs @@ -71,7 +71,10 @@ pub fn transcribe( interp: &FxHashMap<Ident, Rc<NamedMatch>>, src: Vec<quoted::TokenTree>, ) -> TokenStream { - assert!(src.len() > 0); + // Nothing for us to transcribe... + if src.is_empty() { + return TokenStream::empty(); + } // We descend into the RHS (`src`), expanding things as we go. This stack contains the things // we have yet to expand/are still expanding. We start the stack off with the whole RHS. |