/// <summary>
/// Differentiates the specified expression.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="variable">The variable.</param>
/// <param name="parameters">The parameters.</param>
/// <returns>
/// Returns the derivative.
/// </returns>
public IExpression Differentiate(IExpression expression, Variable variable, ExpressionParameters parameters)
{
Differentiator.Variable = variable;
Differentiator.Parameters = parameters;
return(expression.Analyze(Differentiator));
}
private void SimpleTest(IExpression exp, IExpression expected)
{
var simple = exp.Analyze(simplifier);
Assert.Equal(expected, simple);
}
private IExpression Differentiate(IExpression exp, Variable variable, ExpressionParameters parameters)
{
return exp.Analyze(new Differentiator(parameters, variable));
}
/// <summary>
/// Simplifies the <paramref name="expression"/>.
/// </summary>
/// <param name="expression">A expression to simplify.</param>
/// <returns>A simplified expression.</returns>
public IExpression Simplify(IExpression expression)
{
return(expression.Analyze(Simplifier));
}
private IExpression Differentiate(IExpression exp, Variable variable)
{
return exp.Analyze(new Differentiator(variable));
}
private IExpression Differentiate(IExpression exp)
{
return exp.Analyze(new Differentiator());
}
protected void TestException(IExpression exp)
{
Assert.Throws <ParameterTypeMismatchException>(() => exp.Analyze(analyzer));
}
protected void Test(IExpression exp, ResultType expected)
{
var simple = exp.Analyze(analyzer);
Assert.Equal(expected, simple);
}
private void SimpleTest(IExpression exp, IExpression expected)
{
var simple = exp.Analyze(simplifier);
Assert.Equal(expected, simple);
}