@Override public Token parse() { Token next = first.getNext(); if (!next.isOperator(Operator.BRACKET_LEFT)) throw new RuntimeException("Expected '(' after WHILE, found: " + next); next = next.getNext(); testExp = new BooleanExpression(next, scope); next = testExp.parse(); if (!next.isOperator(Operator.BRACKET_RIGHT)) throw new RuntimeException("Expected ')' after WHILE condition, found: " + next); next = next.getNext(); if (!next.isNewline()) throw new RuntimeException("Expected newline, found: " + next); next = next.getNext(); Keyword[] target = {Keyword.END}; statements = new StatementGroup(next, target, scope); next = statements.parse(); return next.getNext(); }