| is_referencevalue(val), validref(str, val .refval, ty, st), st ⊆ st0 ⊦ validref(str, val .refval, ty, st0) |
val = refval(r), is_referencevalue(val), validref(str, r, ty, st), st ⊆ st0 ⊦ validref(str, r, ty, st0)
[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ is_referencevalue(val) → ( r = val .refval ↔ val = refval(r))])], [EXTRATERMS : (val, r)]]