private static object ConstructRubyStruct(RubyConstructor /*!*/ ctor, string /*!*/ structName, Node /*!*/ node)
{
MappingNode mapping = node as MappingNode;
if (mapping == null)
{
throw new ConstructorException("can only construct struct from mapping node");
}
if (structName.Length == 0)
{
// TODO:
throw new NotSupportedException("anonymous structs not supported");
}
RubyContext context = ctor.GlobalScope.Context;
RubyModule module;
// TODO: MRI calls "members" on an arbitrary object
// MRI checks Struct first, then falls back to Object
if (!context.TryGetModule(ctor.GlobalScope, "Struct::" + structName, out module) &&
!context.TryGetModule(ctor.GlobalScope, structName, out module))
{
throw RubyExceptions.CreateTypeError("Undefined struct `{0}'", structName);
}
RubyClass cls = module as RubyClass;
if (cls == null)
{
throw RubyExceptions.CreateTypeError("`{0}' is not a class", structName);
}
RubyStruct newStruct = RubyStruct.Create(cls);
foreach (var pair in ctor.ConstructMapping(mapping))
{
var attributeName = pair.Key as MutableString;
int index;
// TODO: encoding
if (attributeName != null && newStruct.TryGetIndex(attributeName.ToString(), out index))
{
newStruct[index] = pair.Value;
}
}
return(newStruct);
}
