public override HeronValue GetFieldOrMethod(string name)
{
if (!hinterface.HasMethod(name))
{
base.GetFieldOrMethod(name);
}
return(obj.GetFieldOrMethod(name));
}
public HeronValue LookupName(string s)
{
// Look in the scopes starting with the innermost
// and moving to the outermost.
// The outermost scope contains the arguments
for (int i = scopes.Count; i > 0; --i)
{
Scope tbl = scopes[i - 1];
if (tbl.HasName(s))
{
return(tbl[s]);
}
}
// Nothing found in the local vars,
// So we look in the "this" pointer (called "self")
// Note that "self" may be a class instance, or a moduleDef
// instance
if (self != null)
{
HeronValue r = self.GetFieldOrMethod(s);
if (r != null)
{
return(r);
}
// Nothing found in the "this" pointer. So
// we look if it has an enclosing module instance pointer.
// And use that
ModuleInstance mi = self.GetModuleInstance();
if (mi != null)
{
r = mi.GetFieldOrMethod(s);
if (r != null)
{
return(r);
}
}
}
// Look to see if the name is a type in the current module definition.
if (moduleDef != null)
{
HeronType t = moduleDef.FindType(s);
if (t != null)
{
return(t);
}
// Look to see if the name is a type in one of the imported module definitions.
List <HeronType> candidates = new List <HeronType>();
foreach (ModuleDefn defn in moduleDef.GetImportedModuleDefns())
{
t = defn.FindType(s);
if (t != null)
{
candidates.Add(t);
}
}
if (candidates.Count > 1)
{
throw new Exception("Ambiguous name resolution. Multiple modules contain a type named " + s);
}
if (candidates.Count == 1)
{
return(candidates[1]);
}
}
return(null);
}
