v0.5.0

Non-Breaking

• memoize reusable list productions, fixing a bug where repeating a list would cause a reduce-reduce conflict.

  Alpha ::= Beta+ Gamma;
  Delta ::= Beta+ Epsilon;
  

  previously expanded to

  Alpha__0__List ::= Alpha__0__List? Beta;
  Alpha ::= Alpha__0__List Gamma;
  Delta__0__List ::= Delta__0__List? Beta;
  Delta ::= Delta__0__List Epsilon;
  

  Then the instance Beta Beta Beta would cause a reduce-reduce conflict: “should the parser reduce to Alpha__0__List or Delta__0__List?”

  Now, the EBNF builder is smart enough to reuse the item Beta+, and produce the following expansion:

  Alpha__0__List ::= Alpha__0__List? Beta;
  Alpha ::= Alpha__0__List Gamma;
  Delta ::= Alpha__0__List Epsilon;
  

  Now Beta Beta Beta unambiguously reduces to Alpha__0__List.