EBNF: nonterminals

src/representation.rs

@@ -26,6 +26,7 @@ impl Representation {
 #[derive(Debug)]
 pub enum EBNF {
     None,
+    Nonterminal(String),
     CharTerminal(char),
     Alternation(Vec<EBNF>),
 }
@@ -44,6 +45,7 @@ impl fmt::Display for EBNF {
                 }
                 write!(f, "")
             }
+            EBNF::Nonterminal(name) => write!(f, "{name}"),
         }
     }
 }
@@ -62,5 +64,12 @@ mod tests {
         ]);
 
         assert_eq!(example.to_string(), "'f' | 'a' | 'k' | 'e'");
+
+        let example = EBNF::Alternation(vec![
+            EBNF::Nonterminal("other-rule".into()),
+            EBNF::CharTerminal('q'),
+            EBNF::CharTerminal('m'),
+        ]);
+        assert_eq!(example.to_string(), "other-rule | 'q' | 'm'");
     }
 }