protected static AbstractSpecification <TDomainModel> CombineSpecification(AbstractSpecification <TDomainModel> left, AbstractSpecification <TDomainModel> right, Func <Expression, Expression, BinaryExpression> combiner)
{
var lExpr = left.Predicate;
var rExpr = right.Predicate;
var param = Expression.Parameter(typeof(TDomainModel));
var combined = combiner.Invoke(
new ReplaceParameterVisitor {
{ lExpr.Parameters.Single(), param }
}.Visit(lExpr.Body),
new ReplaceParameterVisitor {
{ rExpr.Parameters.Single(), param }
}.Visit(rExpr.Body)
);
return(new ConstructedSpecification <TDomainModel>(Expression.Lambda <Func <TDomainModel, Boolean> >(combined, param)));
}
public static AbstractSpecification <T> Or <T>(this AbstractSpecification <T> left, AbstractSpecification <T> right) => left | right;
public static AbstractSpecification <T> And <T>(this AbstractSpecification <T> left, AbstractSpecification <T> right) => left & right;
