static void Main(string[] args)
{
Console.WriteLine("Expression Visitor for increment/decrement.");
Console.WriteLine();
Expression <Func <int, int> > expressionAddition = num => num + 1;
Expression <Func <int, int> > expressionSubtraction = num => num - 1;
var incDecExpVisitor = new IncDecExpressionVisitor();
Expression incrementExpression = incDecExpVisitor.Modify(expressionAddition);
Expression decrementExpression = incDecExpVisitor.Modify(expressionSubtraction);
Console.WriteLine(expressionAddition);
Console.WriteLine(incrementExpression);
Console.WriteLine(expressionSubtraction);
Console.WriteLine(decrementExpression);
Console.WriteLine("\nExpression Visitor for replace arguments in lambda.");
Console.WriteLine();
Expression <Func <int, int, double> > replaceableExpression = (arg1, arg2) => (arg1 * arg2 + 1.73 * (arg1 / 2 + arg2 / 2));
Console.WriteLine(replaceableExpression);
var subs = new Dictionary <string, ConstantExpression>
{
{ "arg1", Expression.Constant(100) },
{ "arg2", Expression.Constant(10) }
};
var replacer = new ParametersToConstantsReplacer(subs);
var replacedExpression = replacer.Modify(replaceableExpression);
Console.WriteLine(replacedExpression);
var compiledExpression = ((LambdaExpression)replacedExpression).Compile();
Console.WriteLine($"Result: {(double)compiledExpression.DynamicInvoke()}");
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("Expression Visitor for increment/decrement.");
Console.WriteLine();
// todo: feel free to add your code here
Expression <Func <int, int, int> > sourceExpression = (a, b) => a + (a + 1) + (b + 2) + (b + 1) - (a - 1) - (b - 1) - b;
var resultExpression = new IncDecExpressionVisitor().IncDecExpression(sourceExpression);
Console.WriteLine(sourceExpression);
Console.WriteLine(resultExpression);
var dictionary = new Dictionary <string, object> {
{ "a", 1 }, { "b", 2 }
};
resultExpression = new ChangeParameterVisitor().ChangeParameter(sourceExpression, dictionary);
Console.WriteLine(resultExpression);
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("Expression Visitor for increment/decrement.");
Console.WriteLine();
// todo: feel free to add your code here
Expression <Func <int, int> > exp = (a) => a + (a + 1) * (a + 5) * (a + 1) + a + (a - 1);
Expression <Func <int, string, string> > exp2 = (a, Name) => a + (a - 1) * (a + 5) * (a + 1) + Name;
var result = new IncDecExpressionVisitor().VisitAndConvert(exp, "");
Console.WriteLine(exp + " " + exp.Compile().Invoke(3));
Console.WriteLine(result + " " + result.Compile().Invoke(3));
Console.WriteLine();
Console.WriteLine();
var replacedParamsExpression = (new ReplaceParamsExpressionVisitor(exp2, a => 3, Name => " Raccoons forever").ReplaceWithConstant());
Console.WriteLine(replacedParamsExpression + " result: " + replacedParamsExpression.Compile().DynamicInvoke());
Console.ReadLine();
}