libstage: encapsulate stage funs in an ops struct

Introduces stage_ops_t, tidying up stage_new() users.

For now the stage_t simply references the passed in ops struct, so the
caller must ensure its lifetime survives the referencing stages.  That
may be annoying if callers tend to construct them as compound literals
at the call site, but I don't expect that to be too onerous to avoid.

0 files changed, 0 insertions, 0 deletions