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]));
}
