public void SwapTakesPositionFromOtherTokenKeeper()
{
//Arrange
var other = new TokenKeeper(_keeper);
other.Take();
//Act
_keeper.Swap(other);
//Assert
_keeper.IsNext(TokenType.NumericLiteral).Should().BeTrue();
}
private static bool TryTakeOperatorExp(TokenKeeper pos, out ExpressionNode node)
{
var work = new TokenKeeper(pos);
if (TryTakeTerm(work, out var left) &&
TryTakeOperator(work, out var op) &&
TryTakeSecondTerm(work, out var right))
{
node = new OperatorExpNode(left, op, right);
pos.Swap(work);
return(true);
}
node = null;
return(false);
}
private static bool TryTakeParensExp(TokenKeeper pos, out ExpressionNode node)
{
var work = new TokenKeeper(pos);
if (TryTakeOpenParens(work) &&
TryTakeCalcExp(work, out var calc) &&
TryTakeCloseParens(work))
{
node = new ParensExpressionNode(calc);
pos.Swap(work);
return(true);
}
node = null;
return(false);
}
