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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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10
editor/script_editor_debugger.cpp
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@ -215,7 +215,7 @@ void ScriptEditorDebugger::_scene_tree_folded(Object *obj) {
return;
}
TreeItem *item = obj->cast_to<TreeItem>();
TreeItem *item = Object::cast_to<TreeItem>(obj);
if (!item)
return;
@ -1221,7 +1221,7 @@ void ScriptEditorDebugger::_method_changed(Object *p_base, const StringName &p_n
if (!p_base || !live_debug || !connection.is_valid() || !editor->get_edited_scene())
return;
Node *node = p_base->cast_to<Node>();
Node *node = Object::cast_to<Node>(p_base);
VARIANT_ARGPTRS
@ -1249,7 +1249,7 @@ void ScriptEditorDebugger::_method_changed(Object *p_base, const StringName &p_n
return;
}
Resource *res = p_base->cast_to<Resource>();
Resource *res = Object::cast_to<Resource>(p_base);
if (res && res->get_path() != String()) {
@ -1277,7 +1277,7 @@ void ScriptEditorDebugger::_property_changed(Object *p_base, const StringName &p
if (!p_base || !live_debug || !connection.is_valid() || !editor->get_edited_scene())
return;
Node *node = p_base->cast_to<Node>();
Node *node = Object::cast_to<Node>(p_base);
if (node) {
@ -1308,7 +1308,7 @@ void ScriptEditorDebugger::_property_changed(Object *p_base, const StringName &p
return;
}
Resource *res = p_base->cast_to<Resource>();
Resource *res = Object::cast_to<Resource>(p_base);
if (res && res->get_path() != String()) {