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2019-02-12[tactics] Remove dependency of abstract on global proof state.Emilio Jesus Gallego Arias
In order to do so we place the polymorphic status and name in the read-only part of the monad. Note the added comments, as well as the fact that almost no part of tactics depends on `proofs` nor `interp`, thus they should be placed just after pretyping. Gaƫtan Gilbert noted that ideally, abstract should not depend on the polymorphic status, should we be able to defer closing of the constant, however this will require significant effort. Also, we may deprecate nameless abstract, thus rending both of the changes this PR need unnecessary.
2018-12-14[proof] Rework proof interface.Emilio Jesus Gallego Arias
- deprecate the old 5-tuple accessor in favor of a view record, - move `name` and `kind` proof data from `Proof_global` to `Proof`, this will prove useful in subsequent functionalizations of the interface, in particular this is what abstract, which lives in the monads, needs in order no to access global state. - Note that `Proof.t` and `Proof_global.t` are redundant anyways.