Function nodeToTerm

src/prolog/parser.js:209–217

(node)

  }

  function nodeToTerm(node) {
    if (!node) throw new Error('Expected term');
    if (node.type === 'expr') {
      return { type: 'expr', op: node.op, left: nodeToTerm(node.left), right: nodeToTerm(node.right) };
    }
    if (node.type === 'comparison') return convertComparison(node);
    if (node.type === 'goal') return nodeToTerm(node.goal);
    return node;
  }

  const clauses = [];
  while (index < tokens.length) {