1 files changed, 2 insertions, 0 deletions
diff --git a/bnf.h b/bnf.h
index 13337bf..9244b4d 100644
--- a/bnf.h
+++ b/bnf.h
@@ -15,3 +15,5 @@ std::unordered_map<std::string, std::set<std::string>> Reverse(BNF bnf); // unus
 std::unordered_map<std::string, std::set<std::string>> reverseFirst(BNF bnf);
 
 BNF SubBNF(const BNF& bnf, const std::string& top);
+
+bool isTerminal(const BNF& bnf, const std::string& symbol);