/// <exception cref="NotSupportedException" />
/// <exception cref="InvalidOperationException" />
private IEnumerable <T> FilterComparsion(
Expression memberExpression, Expression keyExpression, ExpressionType type)
{
IComparsionIndex <T> index = FindComparsionIndex(memberExpression);
object key = keyExpression.GetValue();
switch (type)
{
case ExpressionType.GreaterThan:
return(index.GreaterThan(key, exclusive: true));
case ExpressionType.GreaterThanOrEqual:
return(index.GreaterThan(key, exclusive: false));
case ExpressionType.LessThan:
return(index.LessThan(key, exclusive: true));
case ExpressionType.LessThanOrEqual:
return(index.LessThan(key, exclusive: false));
default:
throw new NotSupportedException($"Expression {type} should be Comparsion");
}
}