doOp v (LExternal si) [] | si == sUN "prim__stdin" = v ++ "MKPTR(vm, stdin)"
doOp v (LExternal si) [] | si == sUN "prim__stdin" = v ++ "MKPTR(vm, stdin)"
doOp v (LExternal si) [] | si == sUN "prim__stdin" = v ++ "MKPTR(vm, stdin)"