/// <summary>
/// We are going to reference a member item - this is a simple "." coding. If this is a reference
/// to some sort of array, then we need to deal with getting back the proper array type.
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
protected override Expression VisitMember(MemberExpression expression)
{
//
// See if we have special handling for this.
//
var r = TypeHandlers.TryMemberReference(expression, _codeEnv, _codeContext, MEFContainer);
if (r != null)
{
_result = r;
return(expression);
}
//
// Ok - we need to do this the normal way - we split things in
// two - and do the base expression and then try to apply the
// member to that.
//
var baseExpr = GetExpression(expression.Expression);
///
/// Figure out how to represent the variable type. We base this on the type - enumerables, for
/// example, know how to loop, other things like "int" just know how to be simpe values. Eventually
/// this will likely have to be made "common".
///
_result = null;
var leafName = expression.Member.Name;
_codeEnv.AddReferencedLeaf(leafName);
//
// If this is a generic - there is pretty much only one thing we know how to deal with, IEnumerable.
//
if (expression.Type.IsGenericType)
{
if (expression.Type.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
_result = new ValSimple(baseExpr.AsObjectReference(expression) + "." + leafName, expression.Type, baseExpr.Dependants);
}
else
{
throw new NotImplementedException("Can't deal with a generic type for iterator for " + expression.Type.Name + ".");
}
}
///
/// If we can't figure out what the proper special variable type is from above, then we
/// need to just fill in the default.
///
if (_result == null)
{
_result = new ValSimple(baseExpr.AsObjectReference(expression.Expression) + "." + leafName, expression.Type, baseExpr.Dependants);
}
return(expression);
}