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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* Created by Jacek Chrzaszcz, Aug 2002 as part of the implementation of
the Coq module system *)
(* This module provides the main entry points for type-checking basic
declarations *)
open Errors
open Util
open Names
open Univ
open Term
open Context
open Declarations
open Environ
open Entries
open Typeops
let constrain_type env j cst1 = function
| None ->
make_polymorphic_if_constant_for_ind env j, cst1
| Some t ->
let (tj,cst2) = infer_type env t in
let (_,cst3) = judge_of_cast env j DEFAULTcast tj in
assert (eq_constr t tj.utj_val);
let cstrs = union_constraints (union_constraints cst1 cst2) cst3 in
NonPolymorphicType t, cstrs
let local_constrain_type env j cst1 = function
| None ->
j.uj_type, cst1
| Some t ->
let (tj,cst2) = infer_type env t in
let (_,cst3) = judge_of_cast env j DEFAULTcast tj in
assert (eq_constr t tj.utj_val);
t, union_constraints (union_constraints cst1 cst2) cst3
let translate_local_def env (b,topt) =
let (j,cst) = infer env b in
let (typ,cst) = local_constrain_type env j cst topt in
(j.uj_val,typ,cst)
let translate_local_assum env t =
let (j,cst) = infer env t in
let t = Typeops.assumption_of_judgment env j in
(t,cst)
(* Insertion of constants and parameters in environment. *)
let infer_declaration env = function
| DefinitionEntry c ->
let (j,cst) = infer env c.const_entry_body in
let j =
{uj_val = hcons_constr j.uj_val;
uj_type = hcons_constr j.uj_type} in
let (typ,cst) = constrain_type env j cst c.const_entry_type in
let def =
if c.const_entry_opaque
then OpaqueDef (Lazyconstr.opaque_from_val j.uj_val)
else Def (Lazyconstr.from_val j.uj_val)
in
def, typ, cst, c.const_entry_inline_code, c.const_entry_secctx
| ParameterEntry (ctx,t,nl) ->
let (j,cst) = infer env t in
let t = hcons_constr (Typeops.assumption_of_judgment env j) in
Undef nl, NonPolymorphicType t, cst, false, ctx
let global_vars_set_constant_type env = function
| NonPolymorphicType t -> global_vars_set env t
| PolymorphicArity (ctx,_) ->
Sign.fold_rel_context
(fold_rel_declaration
(fun t c -> Id.Set.union (global_vars_set env t) c))
ctx ~init:Id.Set.empty
let check_declared_variables declared inferred =
let mk_set l = List.fold_right Id.Set.add (List.map pi1 l) Id.Set.empty in
let undeclared_set = Id.Set.diff (mk_set inferred) (mk_set declared) in
if not (Id.Set.is_empty undeclared_set) then
error ("The following section variables are used but not declared:\n"^
(String.concat ", "
(List.map Id.to_string (Id.Set.elements undeclared_set))))
let build_constant_declaration env (def,typ,cst,inline_code,ctx) =
let hyps =
let inferred =
let ids_typ = global_vars_set_constant_type env typ in
let ids_def = match def with
| Undef _ -> Id.Set.empty
| Def cs -> global_vars_set env (Lazyconstr.force cs)
| OpaqueDef lc -> global_vars_set env (Lazyconstr.force_opaque lc)
in
keep_hyps env (Id.Set.union ids_typ ids_def)
in
match ctx with
| None -> inferred
| Some declared ->
check_declared_variables declared inferred;
declared
in
let tps = Cemitcodes.from_val (compile_constant_body env def) in
{ const_hyps = hyps;
const_body = def;
const_type = typ;
const_body_code = tps;
const_constraints = cst;
const_native_name = ref NotLinked;
const_inline_code = inline_code }
(*s Global and local constant declaration. *)
let translate_constant env ce =
build_constant_declaration env (infer_declaration env ce)
let translate_recipe env r =
build_constant_declaration env (Cooking.cook_constant env r)
(* Insertion of inductive types. *)
let translate_mind env kn mie = Indtypes.check_inductive env kn mie
|
