Vector invalidation fix

1 files changed, 2 insertions, 1 deletions

diff --git a/bnf.h b/bnf.h
index 56aacb0..b14ca58 100644
--- a/bnf.h
+++ b/bnf.h
@@ -11,6 +11,7 @@ using namespace std::string_literals;
 
 using BNF = std::map<std::string, std::vector<std::vector<std::string>>>;
 
-std::map<std::string, std::set<std::string>> Reverse(BNF bnf);
+std::map<std::string, std::set<std::string>> Reverse(BNF bnf); // unused now, remove?
+std::map<std::string, std::set<std::string>> reverseFirst(BNF bnf);
 
 BNF SubBNF(const BNF& bnf, const std::string& top);