| fs = mkfs(class, ty, fieldvar), oktype(val, ty, st), is_array(r, st) ⊦ fs ' = _type, fs ' = _length, is_array(r, st[r -- fs ', val]) |
oktype(val, ty, st), is_array(r, st) ⊦ mkfs(class, ty, fieldvar) ' = _type, mkfs(class, ty, fieldvar) ' = _length, is_array(r, st[r -- mkfs(class, ty, fieldvar) ', val])
[[CONCRETESIMPRULES : ()]]