minetest.string_to_pos - Uberi/MineTest-API GitHub Wiki
Converts a position string of the form "X, Y, Z" to a position.
Returns nil if input is invalid.
See also: minetest.pos_to_string
[position](../type/position.html) string_to_pos([string](../type/string.html) string)
local pos = minetest.string_to_pos("5, 18, 2")