public void NoMatchingRParenProducesError()
{
const string expression = "1+(2+3";
Result <string> result = ShuntingYard.InfixToPostfixStr(expression);
Assert.IsFalse(result.HasValue);
Assert.True(result.ErrorMessage.StartsWith("No matching right parenthesis"));
}
public void CanProducePostfixNotation()
{
const string expression = "3 + 4 * 2 / ( 1 - 5 ) ^ 2 ^ 3";
Result <string> result = ShuntingYard.InfixToPostfixStr(expression);
if (!result.HasValue)
{
Debug.LogError("ShuntingYard.InfixToPostfix(" + expression + ") Error: " + result.ErrorMessage);
}
Assert.True(result.HasValue);
Assert.AreEqual("3 4 2 * 1 5 - 2 3 ^ ^ / +", result.Value);
}
public void CanProducePostfixNotationWithFunction()
{
const string expression = "sin(max(2, 3) / 3 * 3.1415)";
Result <string> result = ShuntingYard.InfixToPostfixStr(expression);
if (!result.HasValue)
{
Debug.LogError("ShuntingYard.InfixToPostfix(" + expression + ") Error: " + result.ErrorMessage);
}
Assert.True(result.HasValue);
Assert.AreEqual("2 3 max 3 / 3.1415 * sin", result.Value);
}
/// <summary>
/// Called from button wired through the Unity inspector
/// </summary>
public void Evaluate()
{
Result <string> shuntingYardResult = ShuntingYard.InfixToPostfixStr(InputField.text);
RpnField.text = shuntingYardResult.HasValue
? shuntingYardResult.Value
: "<error>";
Result <Expression <Func <double> > > rpnExpTreeResult =
rpnEvaluator.TryEvaluateToExpressionTree(InputField.text);
RpnExpressionTreeField.text = rpnExpTreeResult.HasValue
? rpnExpTreeResult.Value.ToString()
: "<error>";
Result <Expression <Func <double> > > combinatorExpTreeResult =
combinatorEvaluator.TryEvaluateToExpressionTree(InputField.text);
CombinatorExpressionTreeField.text = combinatorExpTreeResult.HasValue
? combinatorExpTreeResult.Value.ToString()
: "<error>";
Result <double> rpnResult = rpnEvaluator.TryEvaluate(InputField.text);
if (!rpnResult.HasValue)
{
RpnErrorsField.text = rpnResult.ErrorMessage;
RpnResultField.text = "<error>";
}
else
{
RpnErrorsField.text = string.Empty;
RpnResultField.text = rpnResult.Value.ToString(CultureInfo.InvariantCulture);
}
Result <double> combinatorResult = combinatorEvaluator.TryEvaluate(InputField.text);
if (!combinatorResult.HasValue)
{
CombinatorErrorsField.text = combinatorResult.ErrorMessage;
CombinatorResultField.text = "<error>";
}
else
{
CombinatorErrorsField.text = string.Empty;
CombinatorResultField.text = combinatorResult.Value.ToString(CultureInfo.InvariantCulture);
}
InputField.ActivateInputField();
}