public static IActivationExpression CompileFilterExpression(FilterElement element, IEnumerable <Declaration> declarations)
{
var optimizer = new ExpressionMultiParameterOptimizer <Func <object[], object> >();
var optimizedExpression = optimizer.CompactParameters(element.Expression, 0);
var @delegate = optimizedExpression.Compile();
var fastDelegate = Create(@delegate, element.Expression.Parameters.Count);
var factMap = IndexMap.CreateMap(element.Imports, declarations);
var expression = new ActivationExpression(element.Expression, fastDelegate, factMap);
return(expression);
}
public IActivationExpression <TResult> CompileActivationExpression <TResult>(ExpressionElement element,
List <Declaration> declarations, IndexMap tupleFactMap)
{
var activationFactMap = IndexMap.CreateMap(element.Imports, declarations);
var factMap = IndexMap.Compose(tupleFactMap, activationFactMap);
var optimizedExpression = ExpressionOptimizer.Optimize <Func <Tuple, TResult> >(
element.Expression, factMap, tupleInput: true, factInput: false);
var @delegate = ExpressionCompiler.Compile(optimizedExpression);
var argumentMap = new ArgumentMap(factMap, element.Expression.Parameters.Count);
var expression = new ActivationExpression <TResult>(element.Expression, @delegate, argumentMap);
return(expression);
}
