public Node parseWhileStatement(Node node)
{
Node test;
List<Node> body;
bool oldInIteration;
expectKeyword("while");
expect("(");
test = parseExpression();
expect(")");
oldInIteration = state.inIteration;
state.inIteration = true;
body = new List<Node>() { parseStatement() };
state.inIteration = oldInIteration;
return node.finishWhileStatement(test, body);
}