protected Expression CreateChildExpression(ParameterExpression param, int index)
{
LiteralNode constant = FindChild <LiteralNode>(index);
if (constant != null)
{
return(constant.CreateExpression());
}
Expression expression = CreateDereferenceExpression(param, index);
if (expression != null)
{
return(expression);
}
PredicateNode predicate = FindChild <PredicateNode>(index);
if (predicate != null)
{
return(predicate.CreateExpression(param));
}
FunctionNode function = FindChild <FunctionNode>(index);
if (function != null)
{
return(function.CreateExpression(param));
}
// by not passing an index we pick up 'WHERE TRUE' etc
LiteralNode literal = FindChild <LiteralNode>();
if (literal != null)
{
return(literal.CreateExpression());
}
return(null);
}
