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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Names
open Libnames
open Decl_kinds
(** {6 Concrete syntax for terms } *)
(** [constr_expr] is the abstract syntax tree produced by the parser *)
type universe_decl_expr = (lident list, Glob_term.glob_constraint list) UState.gen_universe_decl
type ident_decl = lident * universe_decl_expr option
type name_decl = lname * universe_decl_expr option
type notation = string
type 'a or_by_notation_r =
| AN of 'a
| ByNotation of (string * string option)
type 'a or_by_notation = 'a or_by_notation_r CAst.t
(* NB: the last string in [ByNotation] is actually a [Notation.delimiters],
but this formulation avoids a useless dependency. *)
type explicitation =
| ExplByPos of int * Id.t option (* a reference to the n-th product starting from left *)
| ExplByName of Id.t
type binder_kind =
| Default of binding_kind
| Generalized of binding_kind * binding_kind * bool
(** Inner binding, outer bindings, typeclass-specific flag
for implicit generalization of superclasses *)
type abstraction_kind = AbsLambda | AbsPi
type proj_flag = int option (** [Some n] = proj of the n-th visible argument *)
(** Representation of integer literals that appear in Coq scripts.
We now use raw strings of digits in base 10 (big-endian), and a separate
sign flag. Note that this representation is not unique, due to possible
multiple leading zeros, and -0 = +0 *)
type sign = bool
type raw_natural_number = string
type prim_token =
| Numeral of raw_natural_number * sign
| String of string
type instance_expr = Glob_term.glob_level list
type cases_pattern_expr_r =
| CPatAlias of cases_pattern_expr * lname
| CPatCstr of qualid
* cases_pattern_expr list option * cases_pattern_expr list
(** [CPatCstr (_, c, Some l1, l2)] represents [(@ c l1) l2] *)
| CPatAtom of qualid option
| CPatOr of cases_pattern_expr list
| CPatNotation of notation * cases_pattern_notation_substitution
* cases_pattern_expr list (** CPatNotation (_, n, l1 ,l2) represents
(notation n applied with substitution l1)
applied to arguments l2 *)
| CPatPrim of prim_token
| CPatRecord of (qualid * cases_pattern_expr) list
| CPatDelimiters of string * cases_pattern_expr
| CPatCast of cases_pattern_expr * constr_expr
and cases_pattern_expr = cases_pattern_expr_r CAst.t
and cases_pattern_notation_substitution =
cases_pattern_expr list * (** for constr subterms *)
cases_pattern_expr list list (** for recursive notations *)
and constr_expr_r =
| CRef of qualid * instance_expr option
| CFix of lident * fix_expr list
| CCoFix of lident * cofix_expr list
| CProdN of local_binder_expr list * constr_expr
| CLambdaN of local_binder_expr list * constr_expr
| CLetIn of lname * constr_expr * constr_expr option * constr_expr
| CAppExpl of (proj_flag * qualid * instance_expr option) * constr_expr list
| CApp of (proj_flag * constr_expr) *
(constr_expr * explicitation CAst.t option) list
| CRecord of (qualid * constr_expr) list
(* representation of the "let" and "match" constructs *)
| CCases of Constr.case_style (* determines whether this value represents "let" or "match" construct *)
* constr_expr option (* return-clause *)
* case_expr list
* branch_expr list (* branches *)
| CLetTuple of lname list * (lname option * constr_expr option) *
constr_expr * constr_expr
| CIf of constr_expr * (lname option * constr_expr option)
* constr_expr * constr_expr
| CHole of Evar_kinds.t option * Namegen.intro_pattern_naming_expr * Genarg.raw_generic_argument option
| CPatVar of Pattern.patvar
| CEvar of Glob_term.existential_name * (Id.t * constr_expr) list
| CSort of Glob_term.glob_sort
| CCast of constr_expr * constr_expr Glob_term.cast_type
| CNotation of notation * constr_notation_substitution
| CGeneralization of binding_kind * abstraction_kind option * constr_expr
| CPrim of prim_token
| CDelimiters of string * constr_expr
| CProj of qualid * constr_expr
and constr_expr = constr_expr_r CAst.t
and case_expr = constr_expr (* expression that is being matched *)
* lname option (* as-clause *)
* cases_pattern_expr option (* in-clause *)
and branch_expr =
(cases_pattern_expr list list * constr_expr) CAst.t
and fix_expr =
lident * (lident option * recursion_order_expr) *
local_binder_expr list * constr_expr * constr_expr
and cofix_expr =
lident * local_binder_expr list * constr_expr * constr_expr
and recursion_order_expr =
| CStructRec
| CWfRec of constr_expr
| CMeasureRec of constr_expr * constr_expr option (** measure, relation *)
(* Anonymous defs allowed ?? *)
and local_binder_expr =
| CLocalAssum of lname list * binder_kind * constr_expr
| CLocalDef of lname * constr_expr * constr_expr option
| CLocalPattern of (cases_pattern_expr * constr_expr option) CAst.t
and constr_notation_substitution =
constr_expr list * (** for constr subterms *)
constr_expr list list * (** for recursive notations *)
cases_pattern_expr list * (** for binders *)
local_binder_expr list list (** for binder lists (recursive notations) *)
type constr_pattern_expr = constr_expr
(** Concrete syntax for modules and module types *)
type with_declaration_ast =
| CWith_Module of Id.t list CAst.t * qualid
| CWith_Definition of Id.t list CAst.t * universe_decl_expr option * constr_expr
type module_ast_r =
| CMident of qualid
| CMapply of module_ast * module_ast
| CMwith of module_ast * with_declaration_ast
and module_ast = module_ast_r CAst.t
|
