Macros with unlimited parameters (organic specification draft)

For any macro, the final parameter's name may have "..." appended to it, which will signal that any number of parameters may follow.
Here is an example macro that uses that syntax:

.macro example(arg1,arg2,args...)
SET arg1, arg2
ADD PC, args[0]
.endmacro

Any argument that falls within the ellipsized parameter may be indexed with [], starting from zero.
Additionally, args_length will be defined implicitly with the total number of provided arguments.

To assist in making such a feature useful, certain directives should be added:

.for variable=value, iterator, condition
.foreach variable in argument
.while condition

An example:

.macro example(args...)
.foreach arg in args
	SET arg, A
.end
.endmacro

Alternative:

.macro example(args...)
.for i=0, i + 1, i < args_length
	SET args[i], A
.end
.endmacro

Another alternative:

.macro example(args...)
.define i
.while i < args_length
	SET args[i], A
	.redefine i, i+1
.end
.endmacro

The final example demonstrates some extended logic, with ".redefine i, i+1".  Another proposal is to simplify such logic with additional directives.  For example, the same macro, using the proposal, could look like this:

.macro example(args...)
.define i
.while i < args_length
	SET args[i], A ; or SET args[.(i++)], A
	.(i++) ; or (i = i++)
.end
.endmacro