@Override
public void visitPyReferenceExpression(PyReferenceExpression node) {
final PyExpression qualifier = node.getQualifier();
if (qualifier == null || PyNames.CANONICAL_SELF.equals(qualifier.getText())) return;
if (myTypeEvalContext.getType(qualifier) instanceof PyNamedTupleType) return;
final String name = node.getName();
final List<LocalQuickFix> quickFixes = new ArrayList<LocalQuickFix>();
quickFixes.add(new PyRenameElementQuickFix());
if (name != null && name.startsWith("_") && !name.startsWith("__") && !name.endsWith("__")) {
final PsiReference reference = node.getReference(getResolveContext());
if (reference == null) return;
final PsiElement resolvedExpression = reference.resolve();
final PyClass resolvedClass = getClassOwner(resolvedExpression);
if (resolvedExpression instanceof PyTargetExpression) {
final String newName = StringUtil.trimLeading(name, '_');
if (resolvedClass != null) {
final String qFixName =
resolvedClass.getProperties().containsKey(newName)
? PyBundle.message("QFIX.use.property")
: PyBundle.message("QFIX.add.property");
quickFixes.add(new PyAddPropertyForFieldQuickFix(qFixName));
final Collection<String> usedNames = PyRefactoringUtil.collectUsedNames(resolvedClass);
if (!usedNames.contains(newName)) {
quickFixes.add(new PyMakePublicQuickFix());
}
}
}
final PyClass parentClass = getClassOwner(node);
if (parentClass != null) {
if (PyTestUtil.isPyTestClass(parentClass) && ignoreTestFunctions) return;
if (parentClass.isSubclass(resolvedClass)) return;
PyClass outerClass = getClassOwner(parentClass);
while (outerClass != null) {
if (outerClass.isSubclass(resolvedClass)) return;
outerClass = getClassOwner(outerClass);
}
}
final PyType type = myTypeEvalContext.getType(qualifier);
final String bundleKey =
type instanceof PyModuleType
? "INSP.protected.member.$0.access.module"
: "INSP.protected.member.$0.access";
registerProblem(
node,
PyBundle.message(bundleKey, name),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
null,
quickFixes.toArray(new LocalQuickFix[quickFixes.size() - 1]));
}
}
@NotNull
public QualifiedResolveResult followAssignmentsChain(PyResolveContext resolveContext) {
PyReferenceExpression seeker = this;
QualifiedResolveResult ret = null;
List<PyExpression> qualifiers = new ArrayList<PyExpression>();
PyExpression qualifier = seeker.getQualifier();
if (qualifier != null) {
qualifiers.add(qualifier);
}
Set<PsiElement> visited = new HashSet<PsiElement>();
visited.add(this);
SEARCH:
while (ret == null) {
ResolveResult[] targets = seeker.getReference(resolveContext).multiResolve(false);
for (ResolveResult target : targets) {
PsiElement elt = target.getElement();
if (elt instanceof PyTargetExpression) {
PsiElement assigned_from = null;
final PyTargetExpression expr = (PyTargetExpression) elt;
final TypeEvalContext context = resolveContext.getTypeEvalContext();
if (context.maySwitchToAST(expr) || expr.getStub() == null) {
assigned_from = expr.findAssignedValue();
}
// TODO: Maybe findAssignedValueByStub() should become a part of the PyTargetExpression
// interface
else if (elt instanceof PyTargetExpressionImpl) {
assigned_from = ((PyTargetExpressionImpl) elt).findAssignedValueByStub(context);
}
if (assigned_from instanceof PyReferenceExpression) {
if (visited.contains(assigned_from)) {
break;
}
visited.add(assigned_from);
seeker = (PyReferenceExpression) assigned_from;
if (seeker.getQualifier() != null) {
qualifiers.add(seeker.getQualifier());
}
continue SEARCH;
} else if (assigned_from != null)
ret = new QualifiedResolveResultImpl(assigned_from, qualifiers, false);
} else if (ret == null && elt instanceof PyElement && target.isValidResult()) {
// remember this result, but a further reference may be the next resolve result
ret =
new QualifiedResolveResultImpl(
elt, qualifiers, target instanceof ImplicitResolveResult);
}
}
// all resolve results checked, reassignment not detected, nothing more to do
break;
}
if (ret == null) ret = EMPTY_RESULT;
return ret;
}
@Override
public void visitPyReferenceExpression(PyReferenceExpression node) {
super.visitPyReferenceExpression(node);
final PsiElement result = node.getReference().resolve();
if (result != null && PsiTreeUtil.getParentOfType(result, ScopeOwner.class) == myScope) {
if (result instanceof PyParameter && myScope instanceof PyFunction) {
final PyFunction function = (PyFunction) myScope;
final PyParameter[] parameters = function.getParameterList().getParameters();
if (parameters.length > 0 && result == parameters[0]) {
final PyFunction.Modifier modifier = function.getModifier();
if (modifier != PyFunction.Modifier.STATICMETHOD) {
// 'self' is not a local scope dependency
return;
}
}
}
hasLocalScopeDependencies = true;
}
}
@NotNull
private static List<PsiElement> tryResolving(
@NotNull PyExpression expression, @NotNull TypeEvalContext context) {
final List<PsiElement> elements = Lists.newArrayList();
if (expression instanceof PyReferenceExpression) {
final PyReferenceExpression referenceExpr = (PyReferenceExpression) expression;
final PyResolveContext resolveContext =
PyResolveContext.noImplicits().withTypeEvalContext(context);
final PsiPolyVariantReference reference = referenceExpr.getReference(resolveContext);
final List<PsiElement> resolved = PyUtil.multiResolveTopPriority(reference);
for (PsiElement element : resolved) {
if (element instanceof PyFunction) {
final PyFunction function = (PyFunction) element;
if (PyUtil.isInit(function)) {
final PyClass cls = function.getContainingClass();
if (cls != null) {
elements.add(cls);
continue;
}
}
} else if (element instanceof PyTargetExpression) {
final PyTargetExpression targetExpr = (PyTargetExpression) element;
// XXX: Requires switching from stub to AST
final PyExpression assignedValue = targetExpr.findAssignedValue();
if (assignedValue != null) {
elements.add(assignedValue);
continue;
}
}
if (element != null) {
elements.add(element);
}
}
}
return !elements.isEmpty() ? elements : Collections.singletonList(expression);
}
@Override
public void visitPyReferenceExpression(final PyReferenceExpression node) {
if (node.getContainingFile() instanceof PyExpressionCodeFragment) {
return;
}
// Ignore global statements arguments
if (PyGlobalStatementNavigator.getByArgument(node) != null) {
return;
}
// Ignore qualifier inspections
if (node.getQualifier() != null) {
return;
}
// Ignore import subelements
if (PsiTreeUtil.getParentOfType(node, PyImportStatementBase.class) != null) {
return;
}
final String name = node.getReferencedName();
if (name == null) {
return;
}
final ScopeOwner owner = ScopeUtil.getDeclarationScopeOwner(node, name);
final Set<ScopeOwner> largeFunctions = getSession().getUserData(LARGE_FUNCTIONS_KEY);
assert largeFunctions != null;
if (owner == null || largeFunctions.contains(owner)) {
return;
}
// Ignore references declared in outer scopes
if (owner != ScopeUtil.getScopeOwner(node)) {
return;
}
final Scope scope = ControlFlowCache.getScope(owner);
// Ignore globals and if scope even doesn't contain such a declaration
if (scope.isGlobal(name) || (!scope.containsDeclaration(name))) {
return;
}
// Start DFA from the assignment statement in case of augmented assignments
final PsiElement anchor;
final PyAugAssignmentStatement augAssignment =
PsiTreeUtil.getParentOfType(node, PyAugAssignmentStatement.class);
if (augAssignment != null && name.equals(augAssignment.getTarget().getName())) {
anchor = augAssignment;
} else {
anchor = node;
}
final ScopeVariable variable;
try {
variable = scope.getDeclaredVariable(anchor, name);
} catch (DFALimitExceededException e) {
largeFunctions.add(owner);
registerLargeFunction(owner);
return;
}
if (variable == null) {
if (!isFirstUnboundRead(node, owner)) {
return;
}
final PsiPolyVariantReference ref = node.getReference(resolveWithoutImplicits());
if (ref == null) {
return;
}
final PsiElement resolved = ref.resolve();
final boolean isBuiltin = PyBuiltinCache.getInstance(node).hasInBuiltins(resolved);
if (owner instanceof PyClass) {
if (isBuiltin || ScopeUtil.getDeclarationScopeOwner(owner, name) != null) {
return;
}
}
if (PyUnreachableCodeInspection.hasAnyInterruptedControlFlowPaths(node)) {
return;
}
if (owner instanceof PyFile) {
if (isBuiltin) {
return;
}
if (resolved != null && !PyUtil.inSameFile(node, resolved)) {
return;
}
registerProblem(node, PyBundle.message("INSP.unbound.name.not.defined", name));
} else {
registerProblem(
node,
PyBundle.message("INSP.unbound.local.variable", node.getName()),
ProblemHighlightType.GENERIC_ERROR_OR_WARNING,
null,
new AddGlobalQuickFix());
}
}
}