Separate flags for fix/cofix/match reduction and clean reduction function names.

This is a reimplementation of Hugo's PR#117.

We are trying to address the problem that the name of some reduction functions
was not saying what they were doing (e.g. whd_betadeltaiota was doing let-in
reduction). Like PR#117, we are careful that no function changed semantics
without changing the names. Porting existing ML code should be a matter of
renamings a few function calls.

Also, we introduce more precise reduction flags fMATCH, fFIX, fCOFIX
collectively denominated iota.

We renamed the following functions:

Closure.betadeltaiota -> Closure.all
Closure.betadeltaiotanolet -> Closure.allnolet
Reductionops.beta -> Closure.beta
Reductionops.zeta -> Closure.zeta
Reductionops.betaiota -> Closure.betaiota
Reductionops.betaiotazeta -> Closure.betaiotazeta
Reductionops.delta -> Closure.delta
Reductionops.betalet -> Closure.betazeta
Reductionops.betadelta -> Closure.betadeltazeta
Reductionops.betadeltaiota -> Closure.all
Reductionops.betadeltaiotanolet -> Closure.allnolet
Closure.no_red -> Closure.nored
Reductionops.nored -> Closure.nored
Reductionops.nf_betadeltaiota -> Reductionops.nf_all
Reductionops.whd_betadelta -> Reductionops.whd_betadeltazeta
Reductionops.whd_betadeltaiota -> Reductionops.whd_all
Reductionops.whd_betadeltaiota_nolet -> Reductionops.whd_allnolet
Reductionops.whd_betadelta_stack -> Reductionops.whd_betadeltazeta_stack
Reductionops.whd_betadeltaiota_stack -> Reductionops.whd_all_stack
Reductionops.whd_betadeltaiota_nolet_stack -> Reductionops.whd_allnolet_stack
Reductionops.whd_betadelta_state -> Reductionops.whd_betadeltazeta_state
Reductionops.whd_betadeltaiota_state -> Reductionops.whd_all_state
Reductionops.whd_betadeltaiota_nolet_state -> Reductionops.whd_allnolet_state
Reductionops.whd_eta -> Reductionops.shrink_eta
Tacmach.pf_whd_betadeltaiota -> Tacmach.pf_whd_all
Tacmach.New.pf_whd_betadeltaiota -> Tacmach.New.pf_whd_all

And removed the following ones:

Reductionops.whd_betaetalet
Reductionops.whd_betaetalet_stack
Reductionops.whd_betaetalet_state
Reductionops.whd_betadeltaeta_stack
Reductionops.whd_betadeltaeta_state
Reductionops.whd_betadeltaeta
Reductionops.whd_betadeltaiotaeta_stack
Reductionops.whd_betadeltaiotaeta_state
Reductionops.whd_betadeltaiotaeta

They were unused and having some reduction functions perform eta is confusing
as whd_all and nf_all don't do it.

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/fast_typeops.ml b/kernel/fast_typeops.ml
index c2c8ee2424..e28d770e8b 100644
--- a/kernel/fast_typeops.ml
+++ b/kernel/fast_typeops.ml
@@ -35,12 +35,12 @@ let check_constraints cst env =
 
 (* This should be a type (a priori without intention to be an assumption) *)
 let type_judgment env c t =
-  match kind_of_term(whd_betadeltaiota env t) with
+  match kind_of_term(whd_all env t) with
     | Sort s -> {utj_val = c; utj_type = s }
     | _ -> error_not_type env (make_judge c t)
 
 let check_type env c t =
-  match kind_of_term(whd_betadeltaiota env t) with
+  match kind_of_term(whd_all env t) with
   | Sort s -> s
   | _ -> error_not_type env (make_judge c t)
 
@@ -157,7 +157,7 @@ let judge_of_apply env func funt argsv argstv =
   let rec apply_rec i typ = 
     if Int.equal i len then typ
     else 
-      (match kind_of_term (whd_betadeltaiota env typ) with
+      (match kind_of_term (whd_all env typ) with
       | Prod (_,c1,c2) ->
 	let arg = argsv.(i) and argt = argstv.(i) in
 	  (try