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/*
pybind11/warnings.h: Python warnings wrappers.
Copyright (c) 2024 Jan Iwaszkiewicz <jiwaszkiewicz6@gmail.com>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#pragma once
#include "pybind11.h"
#include "detail/common.h"
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
PYBIND11_NAMESPACE_BEGIN(detail)
inline bool PyWarning_Check(PyObject *obj) {
int result = PyObject_IsSubclass(obj, PyExc_Warning);
if (result == 1) {
return true;
}
if (result == -1) {
raise_from(PyExc_SystemError,
"pybind11::detail::PyWarning_Check(): PyObject_IsSubclass() call failed.");
throw error_already_set();
}
return false;
}
PYBIND11_NAMESPACE_END(detail)
PYBIND11_NAMESPACE_BEGIN(warnings)
inline object
new_warning_type(handle scope, const char *name, handle base = PyExc_RuntimeWarning) {
if (!detail::PyWarning_Check(base.ptr())) {
pybind11_fail("pybind11::warnings::new_warning_type(): cannot create custom warning, base "
"must be a subclass of "
"PyExc_Warning!");
}
if (hasattr(scope, name)) {
pybind11_fail("pybind11::warnings::new_warning_type(): an attribute with name \""
+ std::string(name) + "\" exists already.");
}
std::string full_name = scope.attr("__name__").cast<std::string>() + std::string(".") + name;
handle h(PyErr_NewException(full_name.c_str(), base.ptr(), nullptr));
if (!h) {
raise_from(PyExc_SystemError,
"pybind11::warnings::new_warning_type(): PyErr_NewException() call failed.");
throw error_already_set();
}
auto obj = reinterpret_steal<object>(h);
scope.attr(name) = obj;
return obj;
}
// Similar to Python `warnings.warn()`
inline void
warn(const char *message, handle category = PyExc_RuntimeWarning, int stack_level = 2) {
if (!detail::PyWarning_Check(category.ptr())) {
pybind11_fail(
"pybind11::warnings::warn(): cannot raise warning, category must be a subclass of "
"PyExc_Warning!");
}
if (PyErr_WarnEx(category.ptr(), message, stack_level) == -1) {
throw error_already_set();
}
}
PYBIND11_NAMESPACE_END(warnings)
PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
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