godot/modules/gdscript/tests/scripts/runtime/features/argument_count.gd

extends Node

func my_func_1(_foo, _bar):
    pass

func my_func_2(_foo, _bar, _baz):
    pass

static func my_static_func_1(_foo, _bar):
    pass

static func my_static_func_2(_foo, _bar, _baz):
    pass

@rpc
func my_rpc_func_1(_foo, _bar):
    pass

@rpc
func my_rpc_func_2(_foo, _bar, _baz):
    pass

func test():
    # Test built-in methods.
    var builtin_callable_1 : Callable = add_to_group
    print(builtin_callable_1.get_argument_count()) # Should print 2.
    var builtin_callable_2 : Callable = find_child
    print(builtin_callable_2.get_argument_count()) # Should print 3.

    # Test built-in vararg methods.
    var builtin_vararg_callable_1 : Callable = call_thread_safe
    print(builtin_vararg_callable_1.get_argument_count()) # Should print 1.
    var builtin_vararg_callable_2 : Callable = rpc_id
    print(builtin_vararg_callable_2.get_argument_count()) # Should print 2.

    # Test plain methods.
    var callable_1 : Callable = my_func_1
    print(callable_1.get_argument_count()) # Should print 2.
    var callable_2 : Callable = my_func_2
    print(callable_2.get_argument_count()) # Should print 3.

    # Test static methods.
    var static_callable_1 : Callable = my_static_func_1
    print(static_callable_1.get_argument_count()) # Should print 2.
    var static_callable_2 : Callable = my_static_func_2
    print(static_callable_2.get_argument_count()) # Should print 3.

    # Test rpc methods.
    var rpc_callable_1 : Callable = my_rpc_func_1
    print(rpc_callable_1.get_argument_count()) # Should print 2.
    var rpc_callable_2 : Callable = my_rpc_func_2
    print(rpc_callable_2.get_argument_count()) # Should print 3.

    # Test lambdas.
    var lambda_callable_1 : Callable = func(_foo, _bar): pass
    print(lambda_callable_1.get_argument_count()) # Should print 2.
    var lambda_callable_2 : Callable = func(_foo, _bar, _baz): pass
    print(lambda_callable_2.get_argument_count()) # Should print 3.

    # Test lambas with self.
    var lambda_self_callable_1 : Callable = func(_foo, _bar): return self
    print(lambda_self_callable_1.get_argument_count()) # Should print 2.
    var lambda_self_callable_2 : Callable = func(_foo, _bar, _baz): return self
    print(lambda_self_callable_2.get_argument_count()) # Should print 3.

    # Test bind.
    var bind_callable_1 : Callable = my_func_2.bind(1)
    print(bind_callable_1.get_argument_count()) # Should print 2.
    var bind_callable_2 : Callable = my_func_2.bind(1, 2)
    print(bind_callable_2.get_argument_count()) # Should print 1.

    # Test unbind.
    var unbind_callable_1 : Callable = my_func_2.unbind(1)
    print(unbind_callable_1.get_argument_count()) # Should print 4.
    var unbind_callable_2 : Callable = my_func_2.unbind(2)
    print(unbind_callable_2.get_argument_count()) # Should print 5.

    # Test variant callables.
    var string_tmp := String()
    var variant_callable_1 : Callable = string_tmp.replace
    print(variant_callable_1.get_argument_count()) # Should print 2.
    var variant_callable_2 : Callable = string_tmp.rsplit
    print(variant_callable_2.get_argument_count()) # Should print 3.

    # Test variant vararg callables.
    var callable_tmp := Callable()
    var variant_vararg_callable_1 : Callable = callable_tmp.call
    print(variant_vararg_callable_1.get_argument_count()) # Should print 0.
    var variant_vararg_callable_2 : Callable = callable_tmp.rpc_id
    print(variant_vararg_callable_2.get_argument_count()) # Should print 1.

    # Test global methods.
    var global_callable_1 = is_equal_approx
    print(global_callable_1.get_argument_count()) # Should print 2.
    var global_callable_2 = inverse_lerp
    print(global_callable_2.get_argument_count()) # Should print 3.

    # Test GDScript methods.
    var gdscript_callable_1 = char
    print(gdscript_callable_1.get_argument_count()) # Should print 1.
    var gdscript_callable_2 = is_instance_of
    print(gdscript_callable_2.get_argument_count()) # Should print 2.