[Bf-blender-cvs] [ffa0a6df9d9] geometry-nodes: Functions: add generic pointer class
Jacques Lucke
noreply at git.blender.org
Thu Oct 22 15:06:53 CEST 2020
Commit: ffa0a6df9d94df07613bf2e34c6ea10e378d84ac
Author: Jacques Lucke
Date: Thu Oct 22 15:01:31 2020 +0200
Branches: geometry-nodes
https://developer.blender.org/rBffa0a6df9d94df07613bf2e34c6ea10e378d84ac
Functions: add generic pointer class
This class represents a pointer whose type is only known at runtime.
===================================================================
A source/blender/functions/FN_generic_pointer.hh
===================================================================
diff --git a/source/blender/functions/FN_generic_pointer.hh b/source/blender/functions/FN_generic_pointer.hh
new file mode 100644
index 00000000000..4538d7169c2
--- /dev/null
+++ b/source/blender/functions/FN_generic_pointer.hh
@@ -0,0 +1,70 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include "FN_cpp_type.hh"
+
+namespace blender::fn {
+
+/**
+ * A generic pointer whose type is only known at runtime.
+ */
+class GMutablePointer {
+ private:
+ const CPPType *type_ = nullptr;
+ void *data_ = nullptr;
+
+ public:
+ GMutablePointer() = default;
+
+ GMutablePointer(const CPPType *type, void *data = nullptr) : type_(type), data_(data)
+ {
+ /* If there is data, there has to be a type. */
+ BLI_assert(data_ == nullptr || type_ != nullptr);
+ }
+
+ GMutablePointer(const CPPType &type, void *data = nullptr) : GMutablePointer(&type, data)
+ {
+ }
+
+ template<typename T> GMutablePointer(T *data) : GMutablePointer(&CPPType::get<T>(), data)
+ {
+ }
+
+ void *get() const
+ {
+ return data_;
+ }
+
+ const CPPType *type() const
+ {
+ return type_;
+ }
+
+ template<typename T> T *get() const
+ {
+ BLI_assert(this->is_type<T>());
+ return reinterpret_cast<T *>(data_);
+ }
+
+ template<typename T> bool is_type() const
+ {
+ return type_ != nullptr && type_->is<T>();
+ }
+};
+
+} // namespace blender::fn
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