feat: Python Plugins

deps_src/pybind11/include/pybind11/warnings.h

@@ -0,0 +1,75 @@
+/*
+    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)