public static IFluentContinuation <TViewModel, TPropertyValue> DifferentOf <TViewModel, TPropertyValue>(
this IFluentOperator <TViewModel, TPropertyValue> instance, LateValue <TPropertyValue> lateValue)
where TViewModel : ViewModelBase
{
var implementerInstance = (FluentImplementer <TViewModel, TPropertyValue>)instance;
implementerInstance.EnsureContextCurrentPropertyIsNotNull();
implementerInstance.AddToken(ExpressionNode.Not());
implementerInstance.AddToken(ExpressionNode.EqualToLateValue(implementerInstance.Context.CurrentProperty, () => lateValue()));
return((IFluentContinuation <TViewModel, TPropertyValue>)instance);
}
public static IFluentContinuation <TViewModel, TPropertyValue> DifferentOf <TViewModel, TPropertyValue>(
this IFluentOperator <TViewModel, TPropertyValue> instance, Expression <Func <TViewModel, IViewModelProperty> > propertyExpression)
where TViewModel : ViewModelBase
{
var implementerInstance = (FluentImplementer <TViewModel, TPropertyValue>)instance;
implementerInstance.EnsureContextCurrentPropertyIsNotNull();
implementerInstance.UpdateContext(propertyExpression);
// different of = not equal to property
implementerInstance.AddToken(ExpressionNode.Not());
implementerInstance.AddToken(ExpressionNode.EqualToProperty(implementerInstance.Context.CurrentProperty, propertyExpression.Compile()(implementerInstance.ViewModel)));
return((IFluentContinuation <TViewModel, TPropertyValue>)instance);
}
public static IFluentContinuation <TViewModel, TPropertyValue> Required <TViewModel, TPropertyValue>(
this IFluentOperator <TViewModel, TPropertyValue> instance)
where TViewModel : ViewModelBase
{
var implementerInstance = (FluentImplementer <TViewModel, TPropertyValue>)instance;
implementerInstance.EnsureContextCurrentPropertyIsNotNull();
// required = is neither null nor empty
implementerInstance.AddToken(ExpressionNode.Not());
implementerInstance.AddToken(ExpressionNode.OpenParenthesis());
implementerInstance.AddToken(ExpressionNode.EqualToValue(implementerInstance.Context.CurrentProperty, null));
implementerInstance.AddToken(ExpressionNode.Or());
implementerInstance.AddToken(ExpressionNode.EqualToValue(implementerInstance.Context.CurrentProperty, string.Empty));
implementerInstance.AddToken(ExpressionNode.CloseParenthesis());
return((IFluentContinuation <TViewModel, TPropertyValue>)instance);
}