public void TestTokenReader2()
{
TokenReader reader = new TokenReader();
List<Token> tokens = reader.Read("(42+31)");
Assert.AreEqual(5, tokens.Count);
Assert.AreEqual('(', tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(1, tokens[0].Length);
Assert.AreEqual(42, tokens[1].Value);
Assert.AreEqual(1, tokens[1].StartPosition);
Assert.AreEqual(2, tokens[1].Length);
Assert.AreEqual('+', tokens[2].Value);
Assert.AreEqual(3, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
Assert.AreEqual(31, tokens[3].Value);
Assert.AreEqual(4, tokens[3].StartPosition);
Assert.AreEqual(2, tokens[3].Length);
Assert.AreEqual(')', tokens[4].Value);
Assert.AreEqual(6, tokens[4].StartPosition);
Assert.AreEqual(1, tokens[4].Length);
}
private void calculateButton_Click(object sender, RoutedEventArgs e)
{
try
{
ClearScreen();
string formula = formulaTextBox.Text;
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read(formula);
ShowTokens(tokens);
AstBuilder astBuilder = new AstBuilder();
Operation operation = astBuilder.Build(tokens);
ShowAbstractSyntaxTree(operation);
Dictionary<string, double> variables = new Dictionary<string, double>();
foreach (Variable variable in GetVariables(operation))
{
double value = AskValueOfVariable(variable);
variables.Add(variable.Name, value);
}
IExecutor executor = new Interpreter();
double result = executor.Execute(operation, variables);
resultTextBox.Text = "" + result;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
public void TestTokenReader11()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("5.1%2");
Assert.AreEqual(3, tokens.Count);
Assert.AreEqual(5.1, tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(3, tokens[0].Length);
Assert.AreEqual('%', tokens[1].Value);
Assert.AreEqual(3, tokens[1].StartPosition);
Assert.AreEqual(1, tokens[1].Length);
Assert.AreEqual(2, tokens[2].Value);
Assert.AreEqual(4, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
}
/// <summary>
/// Initializes this instance.
/// </summary>
public override void Initialize()
{
Console.WriteLine("Type the equation:");
Console.WriteLine("Samples:");
Console.WriteLine(" 3*x - 2*y + 4*z = 7");
Console.WriteLine(" x * y - 3 * z + t = 8");
Console.WriteLine(" a + b * c + d - f / g = 1000");
Console.WriteLine(" a*x^2 + b * x + c = 100");
Console.WriteLine(" a^3 - 4*b^2 + 3*c - 4 = 0");
m_equation = Console.ReadLine();
var equationParts = m_equation.Split('=');
m_equationLeftPart = equationParts[0];
m_equationRightPart = equationParts[1];
var reader = new TokenReader();
var tokens = reader.Read(m_equationLeftPart);
m_variables = new List<string>();
foreach (var token in tokens)
{
if (token.TokenType == TokenType.Text)
{
var value = token.Value as string;
if (!m_variables.Contains(value))
{
m_variables.Add(value);
}
}
}
var engine = new CalculationEngine();
m_equationResult = (int)engine.Calculate(m_equationRightPart);
}
/// <summary>
/// Build the abstract syntax tree for a given formula. The formula string will
/// be first tokenized.
/// </summary>
/// <param name="formulaText">A string containing the mathematical formula that must be converted
/// into an abstract syntax tree.</param>
/// <returns>The abstract syntax tree of the formula.</returns>
private Operation BuildAbstractSyntaxTree(string formulaText)
{
TokenReader tokenReader = new TokenReader(cultureInfo);
List<Token> tokens = tokenReader.Read(formulaText);
AstBuilder astBuilder = new AstBuilder(FunctionRegistry);
Operation operation = astBuilder.Build(tokens);
if (optimizerEnabled)
return optimizer.Optimize(operation, this.FunctionRegistry);
else
return operation;
}
public void TestTokenReader12()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("-2.1");
Assert.AreEqual(1, tokens.Count);
Assert.AreEqual(-2.1, tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(4, tokens[0].Length);
}
public void TestTokenReader9()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("+varb(");
Assert.AreEqual(3, tokens.Count);
Assert.AreEqual('+', tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(1, tokens[0].Length);
Assert.AreEqual("varb", tokens[1].Value);
Assert.AreEqual(1, tokens[1].StartPosition);
Assert.AreEqual(4, tokens[1].Length);
Assert.AreEqual('(', tokens[2].Value);
Assert.AreEqual(5, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
}
public void TestTokenReader5()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("(42.87+31.0");
Assert.AreEqual(4, tokens.Count);
Assert.AreEqual('(', tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(1, tokens[0].Length);
Assert.AreEqual(42.87, tokens[1].Value);
Assert.AreEqual(1, tokens[1].StartPosition);
Assert.AreEqual(5, tokens[1].Length);
Assert.AreEqual('+', tokens[2].Value);
Assert.AreEqual(6, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
Assert.AreEqual(31.0, tokens[3].Value);
Assert.AreEqual(7, tokens[3].StartPosition);
Assert.AreEqual(4, tokens[3].Length);
}
public void TestTokenReader17()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("logn(2,5)");
Assert.AreEqual(6, tokens.Count);
Assert.AreEqual("logn", tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(4, tokens[0].Length);
Assert.AreEqual('(', tokens[1].Value);
Assert.AreEqual(4, tokens[1].StartPosition);
Assert.AreEqual(1, tokens[1].Length);
Assert.AreEqual(TokenType.LeftBracket, tokens[1].TokenType);
Assert.AreEqual(2, tokens[2].Value);
Assert.AreEqual(5, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
Assert.AreEqual(',', tokens[3].Value);
Assert.AreEqual(6, tokens[3].StartPosition);
Assert.AreEqual(1, tokens[3].Length);
Assert.AreEqual(TokenType.ArgumentSeparator, tokens[3].TokenType);
Assert.AreEqual(5, tokens[4].Value);
Assert.AreEqual(7, tokens[4].StartPosition);
Assert.AreEqual(1, tokens[4].Length);
Assert.AreEqual(')', tokens[5].Value);
Assert.AreEqual(8, tokens[5].StartPosition);
Assert.AreEqual(1, tokens[5].Length);
Assert.AreEqual(TokenType.RightBracket, tokens[5].TokenType);
}
public void TestTokenReader16()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("5*-(2+43)");
Assert.AreEqual(8, tokens.Count);
Assert.AreEqual(5, tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(1, tokens[0].Length);
Assert.AreEqual('*', tokens[1].Value);
Assert.AreEqual(1, tokens[1].StartPosition);
Assert.AreEqual(1, tokens[1].Length);
Assert.AreEqual('_', tokens[2].Value);
Assert.AreEqual(2, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
Assert.AreEqual('(', tokens[3].Value);
Assert.AreEqual(3, tokens[3].StartPosition);
Assert.AreEqual(1, tokens[3].Length);
Assert.AreEqual(2, tokens[4].Value);
Assert.AreEqual(4, tokens[4].StartPosition);
Assert.AreEqual(1, tokens[4].Length);
Assert.AreEqual('+', tokens[5].Value);
Assert.AreEqual(5, tokens[5].StartPosition);
Assert.AreEqual(1, tokens[5].Length);
Assert.AreEqual(43, tokens[6].Value);
Assert.AreEqual(6, tokens[6].StartPosition);
Assert.AreEqual(2, tokens[6].Length);
Assert.AreEqual(')', tokens[7].Value);
Assert.AreEqual(8, tokens[7].StartPosition);
Assert.AreEqual(1, tokens[7].Length);
}
public void TestTokenReader15()
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("5*(-2)");
Assert.AreEqual(5, tokens.Count);
Assert.AreEqual(5, tokens[0].Value);
Assert.AreEqual(0, tokens[0].StartPosition);
Assert.AreEqual(1, tokens[0].Length);
Assert.AreEqual('*', tokens[1].Value);
Assert.AreEqual(1, tokens[1].StartPosition);
Assert.AreEqual(1, tokens[1].Length);
Assert.AreEqual('(', tokens[2].Value);
Assert.AreEqual(2, tokens[2].StartPosition);
Assert.AreEqual(1, tokens[2].Length);
Assert.AreEqual(-2, tokens[3].Value);
Assert.AreEqual(3, tokens[3].StartPosition);
Assert.AreEqual(2, tokens[3].Length);
Assert.AreEqual(')', tokens[4].Value);
Assert.AreEqual(5, tokens[4].StartPosition);
Assert.AreEqual(1, tokens[4].Length);
}
public void TestTokenReader19()
{
AssertExtensions.ThrowsException<ParseException>(() =>
{
TokenReader reader = new TokenReader(CultureInfo.InvariantCulture);
List<Token> tokens = reader.Read("$1+$2+$3");
});
}