module CamlinternalLazy:Run-time support for lazy values. All functions in this module are for system use only, not for the casual user.sig
..end
exception Undefined
val force_lazy_block : 'a lazy_t -> 'a
val force_val_lazy_block : 'a lazy_t -> 'a
val force : 'a lazy_t -> 'a
val force_val : 'a lazy_t -> 'a