private void Verify(PythonNameBinder binder)
{
if (ContainsImportStar && IsClosure)
{
binder.ReportSyntaxError(
"import * is not allowed in function '{0}' because it is a nested function".FormatUI(Name),
this);
}
if (ContainsImportStar && Parent is FunctionDefinition)
{
binder.ReportSyntaxError(
"import * is not allowed in function '{0}' because it is a nested function".FormatUI(Name),
this);
}
if (ContainsImportStar && ContainsNestedFreeVariables)
{
binder.ReportSyntaxError(
"import * is not allowed in function '{0}' because it contains a nested function with free variables".FormatUI(Name),
this);
}
if (ContainsUnqualifiedExec && ContainsNestedFreeVariables)
{
binder.ReportSyntaxError(
"unqualified exec is not allowed in function '{0}' because it contains a nested function with free variables".FormatUI(Name),
this);
}
if (ContainsUnqualifiedExec && IsClosure)
{
binder.ReportSyntaxError(
"unqualified exec is not allowed in function '{0}' because it is a nested function".FormatUI(Name),
this);
}
}
internal virtual void Bind(PythonNameBinder binder)
{
if (_references != null)
{
foreach (var refList in _references.Values)
{
foreach (var reference in refList)
{
PythonVariable variable;
reference.Variable = variable = BindReference(binder, reference.Name);
// Accessing outer scope variable which is being deleted?
if (variable != null)
{
if (variable.Deleted && variable.Scope != this && !variable.Scope.IsGlobal && binder.LanguageVersion < PythonLanguageVersion.V32)
{
// report syntax error
binder.ReportSyntaxError(
"can not delete variable '{0}' referenced in nested scope".FormatUI(reference.Name),
this);
}
}
}
}
}
}
internal virtual void FinishBind(PythonNameBinder binder)
{
List <ClosureInfo> closureVariables = null;
if (_nonLocalVars != null)
{
foreach (var variableName in _nonLocalVars)
{
var bound = false;
for (var parent = Parent; parent != null; parent = parent.Parent)
{
if (parent.TryBindOuter(this, variableName.Name, false, out var variable))
{
bound = !variable.IsGlobal;
break;
}
}
if (!bound)
{
binder.ReportSyntaxError("no binding for nonlocal '{0}' found".FormatUI(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 (var 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);
}
}
}
// no longer needed
_references = null;
}