internal override PythonVariable BindReference(PythonNameBinder binder, string name)
{
PythonVariable variable;
// First try variables local to this scope
if (TryGetVariable(name, out variable) && variable.Kind != VariableKind.Nonlocal)
{
if (variable.Kind == VariableKind.Global)
{
AddReferencedGlobal(name);
}
return(variable);
}
// Try to bind in outer scopes
for (ScopeStatement parent = Parent; parent != null; parent = parent.Parent)
{
if (parent.TryBindOuter(this, name, true, out variable))
{
return(variable);
}
}
return(null);
}
internal override PythonVariable BindReference(PythonNameBinder binder, string name)
{
PythonVariable variable;
// Python semantics: The variables bound local in the class
// scope are accessed by name - the dictionary behavior of classes
if (TryGetVariable(name, out variable))
{
// TODO: This results in doing a dictionary lookup to get/set the local,
// when it should probably be an uninitialized check / global lookup for gets
// and a direct set
if (variable.Kind == VariableKind.Global)
{
AddReferencedGlobal(name);
}
else if (variable.Kind == VariableKind.Local)
{
return(null);
}
return(variable);
}
// Try to bind in outer scopes, if we have an unqualified exec we need to leave the
// variables as free for the same reason that locals are accessed by name.
for (ScopeStatement parent = Parent; parent != null; parent = parent.Parent)
{
if (parent.TryBindOuter(this, name, true, out variable))
{
return(variable);
}
}
return(null);
}
internal virtual void FinishBind(PythonNameBinder binder)
{
List <ClosureInfo> closureVariables = null;
if (_nonLocalVars != null)
{
foreach (var variableName in _nonLocalVars)
{
bool bound = false;
for (ScopeStatement parent = Parent; parent != null; parent = parent.Parent)
{
PythonVariable variable;
if (parent.TryBindOuter(this, variableName.Name, false, out variable))
{
bound = !variable.IsGlobal;
break;
}
}
if (!bound)
{
binder.ReportSyntaxError(String.Format("no binding for nonlocal '{0}' found", variableName.Name), variableName);
}
}
}
if (FreeVariables != null && FreeVariables.Count > 0)
{
closureVariables = new List <ClosureInfo>();
foreach (var variable in FreeVariables)
{
closureVariables.Add(new ClosureInfo(variable, !(this is ClassDefinition)));
}
}
if (Variables != null && Variables.Count > 0)
{
if (closureVariables == null)
{
closureVariables = new List <ClosureInfo>();
}
foreach (PythonVariable variable in Variables.Values)
{
if (!HasClosureVariable(closureVariables, variable) &&
!variable.IsGlobal && (variable.AccessedInNestedScope || ExposesLocalVariable(variable)))
{
closureVariables.Add(new ClosureInfo(variable, true));
}
if (variable.Kind == VariableKind.Local)
{
Debug.Assert(variable.Scope == this);
}
}
}
if (closureVariables != null)
{
_closureVariables = closureVariables.ToArray();
}
// no longer needed
_references = null;
}