public override Expression Property(Expression target, string name, SourceInfo sourceInfo)
{
if (IsConstantType(target))
{
//TODO: if null, log (or error in strict mode)
return(_memberResolver.MemberExpression(name, target.Type, target, Reflection.MemberAccessMode.Read)
?? Constants.NullExpression);
}
return(base.Property(target, name, sourceInfo));
}
public override DynamicMetaObject FallbackSetMember(DynamicMetaObject target, DynamicMetaObject value, DynamicMetaObject errorSuggestion)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (value == null)
{
throw new ArgumentNullException(nameof(target));
}
if (!target.HasValue || !value.HasValue)
{
return(Defer(target, value));
}
if (target.Value == null)
{
return(BinderHelper.NullTargetResult(target, errorSuggestion));
}
if (value.Value == null)
{
return(BinderHelper.SetNullValue(this, value));
}
var memberAccess = _memberResolver.MemberExpression(Name, target, MemberAccessMode.Write);
var restrictions = BinderHelper.CreateCommonRestrictions(target);
if (memberAccess == null || !memberAccess.Type.IsAssignableFrom(value.RuntimeType))
{
BindingEventSource.Log.SetMemberResolutionFailure(Name, target.RuntimeType.FullName, value.RuntimeType.FullName);
return(BinderHelper.UnresolveableResult(restrictions, errorSuggestion));
}
var result = VelocityExpressions.BoxIfNeeded(
Expression.Assign(
memberAccess,
VelocityExpressions.ConvertIfNeeded(value, memberAccess.Type)
)
);
return(new DynamicMetaObject(result, restrictions));
}
public override DynamicMetaObject FallbackGetMember(DynamicMetaObject target, DynamicMetaObject errorSuggestion)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
if (!target.HasValue)
{
return(Defer(target));
}
if (target.Value == null)
{
return(BinderHelper.NullTargetResult(target, errorSuggestion));
}
Expression result = null;
var restrictions = BinderHelper.CreateCommonRestrictions(target);
try
{
result = _memberResolver.MemberExpression(Name, target, MemberAccessMode.Read);
}
catch (AmbiguousMatchException)
{
BindingEventSource.Log.GetMemberResolutionAmbiguous(Name, target.RuntimeType.FullName);
return(BinderHelper.UnresolveableResult(restrictions, errorSuggestion));
}
if (result == null)
{
BindingEventSource.Log.GetMemberResolutionFailure(Name, target.RuntimeType.FullName);
return(BinderHelper.UnresolveableResult(restrictions, errorSuggestion));
}
return(new DynamicMetaObject(
VelocityExpressions.ConvertIfNeeded(result, ReturnType),
restrictions
));
}
