From 9be8424ef980d7a85e08535de986123033ba55aa Mon Sep 17 00:00:00 2001 From: Rikhardur Bjarni Einarsson Date: Mon, 29 Apr 2019 23:38:42 +0100 Subject: Added an is_valid function to FuncRef so script can check if it is safe to call it. --- core/func_ref.cpp | 13 +++++++++++++ core/func_ref.h | 1 + 2 files changed, 14 insertions(+) diff --git a/core/func_ref.cpp b/core/func_ref.cpp index 4a965473d9..3d03137d09 100644 --- a/core/func_ref.cpp +++ b/core/func_ref.cpp @@ -51,11 +51,23 @@ void FuncRef::set_instance(Object *p_obj) { ERR_FAIL_NULL(p_obj); id = p_obj->get_instance_id(); } + void FuncRef::set_function(const StringName &p_func) { function = p_func; } +bool FuncRef::is_valid() const { + if (id == 0) + return false; + + Object *obj = ObjectDB::get_instance(id); + if (!obj) + return false; + + return obj->has_method(function); +} + void FuncRef::_bind_methods() { { @@ -67,6 +79,7 @@ void FuncRef::_bind_methods() { ClassDB::bind_method(D_METHOD("set_instance", "instance"), &FuncRef::set_instance); ClassDB::bind_method(D_METHOD("set_function", "name"), &FuncRef::set_function); + ClassDB::bind_method(D_METHOD("is_valid"), &FuncRef::is_valid); } FuncRef::FuncRef() : diff --git a/core/func_ref.h b/core/func_ref.h index 339279fdba..a143b58bf0 100644 --- a/core/func_ref.h +++ b/core/func_ref.h @@ -46,6 +46,7 @@ public: Variant call_func(const Variant **p_args, int p_argcount, Variant::CallError &r_error); void set_instance(Object *p_obj); void set_function(const StringName &p_func); + bool is_valid() const; FuncRef(); }; -- cgit v1.2.3