public static Expression <Func <TSource, TResult> > Continue <TSource, TItem, TResult>(this Expression <Func <TSource, TItem> > sourceExpression, Expression <Func <TItem, TResult> > continueExpression) { ExpressionVisitor rebinder; switch (sourceExpression.Body.NodeType) { case ExpressionType.MemberAccess: { rebinder = new MemberRebinder(continueExpression.Parameters[0], (MemberExpression)sourceExpression.Body); break; } case ExpressionType.Parameter: { rebinder = new ParameterRebinder(continueExpression.Parameters[0], (ParameterExpression)sourceExpression.Body); break; } default: rebinder = new ExpressionRebinder(continueExpression.Parameters[0], sourceExpression.Body); break; } Expression resultBody = rebinder.Visit(continueExpression.Body); return(Expression.Lambda <Func <TSource, TResult> >(resultBody, sourceExpression.Parameters)); }
public static Expression <Func <TSecondSource, TResult> > ReplaceParameter <TSource, TSecondSource, TResult>(this Expression <Func <TSource, TResult> > sourceExpression, Expression <Func <TSecondSource, TSource> > member) { ExpressionVisitor rebinder = new MemberRebinder(sourceExpression.Parameters[0], (MemberExpression)member.Body); Expression resultBody = rebinder.Visit(sourceExpression.Body); return(Expression.Lambda <Func <TSecondSource, TResult> >(resultBody, member.Parameters[0])); }