public void InvalidArgumentIndex()
{
Expression key = Expression.Constant("Key");
Expression value = Expression.Constant(42);
ElementInit init = Expression.ElementInit(typeof(Dictionary <string, int>).GetMethod("Add"), key, value);
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => init.GetArgument(-1));
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => init.GetArgument(2));
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => init.GetArgument(3));
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => init.GetArgument(int.MaxValue));
}
public void CanAccessArguments()
{
Expression key = Expression.Constant("Key");
Expression value = Expression.Constant(42);
ElementInit init = Expression.ElementInit(typeof(Dictionary <string, int>).GetMethod("Add"), key, value);
Assert.Equal(2, init.ArgumentCount);
Assert.Same(key, init.GetArgument(0));
Assert.Same(value, init.GetArgument(1));
Assert.Equal(new[] { key, value }, init.Arguments);
}
protected override ElementInit VisitElementInit(ElementInit initializer)
{
Out(initializer.AddMethod.ToString());
string sep = ", ";
Out('(');
for (int i = 0, n = initializer.ArgumentCount(); i < n; i++)
{
if (i > 0)
{
Out(sep);
}
Visit(initializer.GetArgument(i));
}
Out(')');
return(initializer);
}