DFHack
item: add a way to distinguish economic and non-economic stone materials
either with a new parameter or by augmenting the df.dfhack_material_category infrastructure
Is the intent to determine whether a stone is marked as economic (and would be excluded by most jobs) or whether the stone has potential economic uses (i.e. if the game would mark it as economic by default)?
I believe it's the latter definition that the requester (which I apparently forgot to cite) was going for
could be done by adding economic and noneconomic bits to the bitfield, and adding appropriate tests in MaterialInfo::matches
the process for determining if a stone "has economic uses" is, however, somewhat nontrivial, which means this test could be expensive if not cached
