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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/collision_polygon_editor_plugin.cpp
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@@ -464,7 +464,7 @@ void CollisionPolygonEditor::edit(Node *p_collision_polygon) {
if (p_collision_polygon) {
node = p_collision_polygon->cast_to<CollisionPolygon>();
node = Object::cast_to<CollisionPolygon>(p_collision_polygon);
wip.clear();
wip_active = false;
edited_point = -1;
@@ -555,7 +555,7 @@ CollisionPolygonEditor::~CollisionPolygonEditor() {
void CollisionPolygonEditorPlugin::edit(Object *p_object) {
collision_polygon_editor->edit(p_object->cast_to<Node>());
collision_polygon_editor->edit(Object::cast_to<Node>(p_object));
}
bool CollisionPolygonEditorPlugin::handles(Object *p_object) const {