B::hooks::op::annotation provides a way for xs code that hijacks op op_ppaddr functions to delegate to (or restore) the previous functions, whether they are assigned by perl or by another module. typically this should be used in conjunction with b::hooks::op::check (see libb-hooks-op-check-perl).

b::hooks::op::annotation makes its types and functions available to xs code by means of extutils::depends (libextutils-depends-perl). modules that wish to use these exports in their xs code should use b::op::hooks::annotation in the perl module that loads the xs.