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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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2
editor/editor_autoload_settings.cpp
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@@ -238,7 +238,7 @@ void EditorAutoloadSettings::_autoload_edited() {
void EditorAutoloadSettings::_autoload_button_pressed(Object *p_item, int p_column, int p_button) {
TreeItem *ti = p_item->cast_to<TreeItem>();
TreeItem *ti = Object::cast_to<TreeItem>(p_item);
String name = "autoload/" + ti->get_text(0);