@Nullable
@Override
public PyType getReturnType(
@NotNull TypeEvalContext context, @Nullable PyQualifiedExpression callSite) {
final PyType type = getGenericReturnType(context, callSite);
if (callSite == null) {
return type;
}
final PyTypeChecker.AnalyzeCallResults results =
PyTypeChecker.analyzeCallSite(callSite, context);
if (PyTypeChecker.hasGenerics(type, context)) {
if (results != null) {
final Map<PyGenericType, PyType> substitutions =
PyTypeChecker.unifyGenericCall(
this, results.getReceiver(), results.getArguments(), context);
if (substitutions != null) {
return PyTypeChecker.substitute(type, substitutions, context);
}
}
return null;
}
if (results != null && isDynamicallyEvaluated(results.getArguments().values(), context)) {
return PyUnionType.createWeakType(type);
} else {
return type;
}
}
@Nullable
/** Suits when there is no call site(e.g. implicit __iter__ call in statement for) */
public PyType getReturnTypeWithoutCallSite(
@NotNull TypeEvalContext context, @Nullable PyExpression receiver) {
final PyType type = getGenericReturnType(context, null);
if (PyTypeChecker.hasGenerics(type, context)) {
final Map<PyGenericType, PyType> substitutions =
PyTypeChecker.unifyGenericCall(
this, receiver, Maps.<PyExpression, PyNamedParameter>newHashMap(), context);
if (substitutions != null) {
return PyTypeChecker.substitute(type, substitutions, context);
}
return null;
}
return type;
}
@Nullable
private PyType analyzeCallType(
@Nullable PyType type,
@Nullable PyExpression receiver,
@NotNull Map<PyExpression, PyNamedParameter> parameters,
@NotNull TypeEvalContext context) {
if (PyTypeChecker.hasGenerics(type, context)) {
final Map<PyGenericType, PyType> substitutions =
PyTypeChecker.unifyGenericCall(receiver, parameters, context);
if (substitutions != null) {
type = PyTypeChecker.substitute(type, substitutions, context);
} else {
type = null;
}
}
if (receiver != null) {
type = replaceSelf(type, receiver, context);
}
if (type != null && isDynamicallyEvaluated(parameters.values(), context)) {
type = PyUnionType.createWeakType(type);
}
return type;
}