Unable to configure functions with more than five parameters in AnimationTrack

[Rubonnek]

Godot version

3.x at 4febf69

System information

Arch Linux

Issue description

Currently it's impossible to properly configure AnimationPlayer "Call Method" tracks which call functions with more than five parameters, such as TileMap.set_cell.

The issue is that the argument count is capped at 5, and the possible argument counts for the associated EditorSpinSlider is also capped at 5.

Steps to reproduce

1. Create an AnimationPlayer node with a TileMap as it's root node.
2. Add a "Call method" track to the AnimationPlayer tracks.
3. Insert a track key for TileMap.set_cell
4. Note that the arguments array has the correct number of parameters (7) but the argument count is stuck at 5.
5. If one were to decrease the argument count, it will be impossible to increase it back to 7.

Minimal reproduction project

ArgCountBug.zip

Look at the Args array and the Arg Count value Inspector in the following screenshot taken from the attached project

.

[Rubonnek]

This issue is also present on master.

[Rubonnek]

Limit caused by VARIANT_ARG_MAX, and related macros/function calls.

godot/core/object.h

Lines 46 to 52 in 4febf69

	#define VARIANT_ARG_LIST const Variant &p_arg1 = Variant(), const Variant &p_arg2 = Variant(), const Variant &p_arg3 = Variant(), const Variant &p_arg4 = Variant(), const Variant &p_arg5 = Variant()
	#define VARIANT_ARG_PASS p_arg1, p_arg2, p_arg3, p_arg4, p_arg5
	#define VARIANT_ARG_DECLARE const Variant &p_arg1, const Variant &p_arg2, const Variant &p_arg3, const Variant &p_arg4, const Variant &p_arg5
	#define VARIANT_ARG_MAX 5
	#define VARIANT_ARGPTRS const Variant *argptr[5] = { &p_arg1, &p_arg2, &p_arg3, &p_arg4, &p_arg5 };
	#define VARIANT_ARGPTRS_PASS *argptr[0], *argptr[1], *argptr[2], *argptr[3], *argptr[4]
	#define VARIANT_ARGS_FROM_ARRAY(m_arr) m_arr[0], m_arr[1], m_arr[2], m_arr[3], m_arr[4]

Related:

• UndoRedo's do/undo methods can't go further than 5 arguments #26483
• Add static_assert checks where code assumes VARIANT_ARG_MAX == 5 #39053