public void TestOverwritable()
{
FunctionRegistry registry = new FunctionRegistry(false);
Func<double, double, double> testFunction1 = (a, b) => a * b;
Func<double, double, double> testFunction2 = (a, b) => a * b;
registry.RegisterFunction("test", testFunction1);
registry.RegisterFunction("test", testFunction2);
}
public void TestAddFunc2()
{
FunctionRegistry registry = new FunctionRegistry(false);
Func<double, double, double> testFunction = (a, b) => a * b;
registry.RegisterFunction("test", testFunction);
FunctionInfo functionInfo = registry.GetFunctionInfo("test");
Assert.IsNotNull(functionInfo);
Assert.AreEqual("test", functionInfo.FunctionName);
Assert.AreEqual(2, functionInfo.NumberOfParameters);
Assert.AreEqual(testFunction, functionInfo.Function);
}
public void TestNotOverwritable()
{
FunctionRegistry registry = new FunctionRegistry(false);
Func<double, double, double> testFunction1 = (a, b) => a * b;
Func<double, double, double> testFunction2 = (a, b) => a * b;
registry.RegisterFunction("test", testFunction1, false);
AssertExtensions.ThrowsException<Exception>(() =>
{
registry.RegisterFunction("test", testFunction2, false);
});
}
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);
IFunctionRegistry functionRegistry = new FunctionRegistry(false);
AstBuilder astBuilder = new AstBuilder(functionRegistry);
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, null, variables);
resultTextBox.Text = "" + result;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}