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Convert Object::cast_to() to the static version

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Currently we rely on some undefined behavior when Object->cast_to() gets
called with a Null pointer. This used to work fine with GCC < 6 but
newer versions of GCC remove all codepaths in which the this pointer is
Null. However, the non-static cast_to() was supposed to be null safe.

This patch makes cast_to() Null safe and removes the now redundant Null
checks where they existed.

It is explained in this article: https://www.viva64.com/en/b/0226/
This commit is contained in:
Hein-Pieter van Braam
2017-08-24 22:58:51 +02:00
parent 4aa2c18cb4
commit cacced7e50
185 changed files with 1314 additions and 1508 deletions
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4
editor/plugins/path_2d_editor_plugin.cpp
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@@ -534,7 +534,7 @@ void Path2DEditor::edit(Node *p_path2d) {
if (p_path2d) {
node = p_path2d->cast_to<Path2D>();
node = Object::cast_to<Path2D>(p_path2d);
if (!canvas_item_editor->get_viewport_control()->is_connected("draw", this, "_canvas_draw"))
canvas_item_editor->get_viewport_control()->connect("draw", this, "_canvas_draw");
if (!node->is_connected("visibility_changed", this, "_node_visibility_changed"))
@@ -676,7 +676,7 @@ Path2DEditor::Path2DEditor(EditorNode *p_editor) {
void Path2DEditorPlugin::edit(Object *p_object) {
path2d_editor->edit(p_object->cast_to<Node>());
path2d_editor->edit(Object::cast_to<Node>(p_object));
}
bool Path2DEditorPlugin::handles(Object *p_object) const {