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| author |  Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2017-08-29 19:05:57 +0200 |
|---|---|---|
| committer | Pierre-Marie Pédrot <pierre-marie.pedrot@inria.fr> | 2017-09-04 11:28:49 +0200 |
| commit | 1db568d3dc88d538f975377bb4d8d3eecd87872c (patch) | |
| tree | d8e35952cc8f6111875e664d8884dc2c7f908206 /plugins/ltac/pptactic.ml | |
| parent | 3072bd9d080984833f5eb007bf15c6e9305619e3 (diff) | |
Making detyping potentially lazy.
The internal detype function takes an additional arguments dictating
whether it should be eager or lazy.
We introduce a new type of delayed `DAst.t` AST nodes and use it for
`glob_constr`.
Such type, instead of only containing a value, it can contain a lazy
computation too. We use a GADT to discriminate between both uses
statically, so that no delayed terms ever happen to be
marshalled (which would raise anomalies).
We also fix a regression in the test-suite:
Mixing laziness and effects is a well-known hell. Here, an exception
that was raised for mere control purpose was delayed and raised at a
later time as an anomaly. We make the offending function eager.
Diffstat (limited to 'plugins/ltac/pptactic.ml')
| -rw-r--r-- | plugins/ltac/pptactic.ml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/ltac/pptactic.ml b/plugins/ltac/pptactic.ml index cb7d9b9c0..f4e3ba633 100644 --- a/plugins/ltac/pptactic.ml +++ b/plugins/ltac/pptactic.ml @@ -1040,7 +1040,7 @@ type 'a extra_genarg_printer = let strip_prod_binders_glob_constr n (ty,_) = let rec strip_ty acc n ty = if Int.equal n 0 then (List.rev acc, (ty,None)) else - match ty.CAst.v with + match DAst.get ty with Glob_term.GProd(na,Explicit,a,b) -> strip_ty (([Loc.tag na],(a,None))::acc) (n-1) b | _ -> user_err Pp.(str "Cannot translate fix tactic: not enough products") in |