ppxlib

Standard library for ppx rewriters
Library ppxlib.astlib
Module Astlib . Ast_500 . Parsetree
include module type of struct include Ast_414.Parsetree end
type constant = Parsetree.constant =
| Pconst_integer of string * char option(*

Integer constants such as 3 3l 3L 3n.

Suffixes [g-z][G-Z] are accepted by the parser. Suffixes except 'l', 'L' and 'n' are rejected by the typechecker

*)
| Pconst_char of char(*

Character such as 'c'.

*)
| Pconst_string of string * Location.t * string option(*

Constant string such as "constant" or {delim|other constant|delim}.

The location span the content of the string, without the delimiters.

*)
| Pconst_float of string * char option(*

Float constant such as 3.4, 2e5 or 1.4e-4.

Suffixes g-zG-Z are accepted by the parser. Suffixes are rejected by the typechecker.

*)
type location_stack = Location.t list

Extension points

type attribute = Parsetree.attribute = {
attr_name : string Location.loc;
attr_payload : payload;
attr_loc : Location.t;
}

Attributes such as [\@id ARG] and [\@\@id ARG].

Metadata containers passed around within the AST. The compiler ignores unknown attributes.

and extension = string Location.loc * payload

Extension points such as [%id ARG] and [%%id ARG].

Sub-language placeholder -- rejected by the typechecker.

and attributes = attribute list
and payload = Parsetree.payload =
| PStr of structure
| PSig of signature(*

: SIG in an attribute or an extension point

*)
| PTyp of core_type(*

: T in an attribute or an extension point

*)
| PPat of pattern * expression option(*

? P or ? P when E, in an attribute or an extension point

*)

Core language

Type expressions

and core_type = Parsetree.core_type = {
ptyp_desc : core_type_desc;
ptyp_loc : Location.t;
ptyp_loc_stack : location_stack;
ptyp_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and core_type_desc = Parsetree.core_type_desc =
| Ptyp_any(*

_

*)
| Ptyp_var of string(*

A type variable such as 'a

*)
| Ptyp_arrow of Asttypes.arg_label * core_type * core_type(*

Ptyp_arrow(lbl, T1, T2) represents:

*)
| Ptyp_tuple of core_type list(*

Ptyp_tuple([T1 ; ... ; Tn]) represents a product type T1 * ... * Tn.

Invariant: n >= 2.

*)
| Ptyp_constr of Longident.t Location.loc * core_type list(*

Ptyp_constr(lident, l) represents:

  • tconstr when l=[],
  • T tconstr when l=[T],
  • (T1, ..., Tn) tconstr when l=[T1 ; ... ; Tn].
*)
| Ptyp_object of object_field list * Asttypes.closed_flag(*

Ptyp_object([ l1:T1; ...; ln:Tn ], flag) represents:

  • < l1:T1; ...; ln:Tn > when flag is Closed,
  • < l1:T1; ...; ln:Tn; .. > when flag is Open.
*)
| Ptyp_class of Longident.t Location.loc * core_type list(*

Ptyp_class(tconstr, l) represents:

  • #tconstr when l=[],
  • T #tconstr when l=[T],
  • (T1, ..., Tn) #tconstr when l=[T1 ; ... ; Tn].
*)
| Ptyp_alias of core_type * string(*

T as 'a.

*)
| Ptyp_variant of row_field list * Asttypes.closed_flag * string list option(*

Ptyp_variant([`A;`B], flag, labels) represents:

  • [ `A|`B ] when flag is Closed, and labels is None,
  • [> `A|`B ] when flag is Open, and labels is None,
  • [< `A|`B ] when flag is Closed, and labels is Some [],
  • [< `A|`B > `X `Y ] when flag is Closed, and labels is Some ["X";"Y"].
*)
| Ptyp_poly of string Location.loc list * core_type(*

'a1 ... 'an. T

Can only appear in the following context:

let x : 'a1 ... 'an. T = e ...
*)
| Ptyp_package of package_type(*

(module S).

*)
| Ptyp_extension of extension(*

[%id].

*)

As package_type typed values:

  • (S, []) represents (module S),
  • (S, [(t1, T1) ; ... ; (tn, Tn)]) represents (module S with type t1 = T1 and ... and tn = Tn).
and row_field = Parsetree.row_field = {
prf_desc : row_field_desc;
prf_loc : Location.t;
prf_attributes : attributes;
}
and row_field_desc = Parsetree.row_field_desc =
| Rtag of string Location.loc * bool * core_type list(*

Rtag(`A, b, l) represents:

  • `A when b is true and l is [],
  • `A of T when b is false and l is [T],
  • `A of T1 & .. & Tn when b is false and l is [T1;...Tn],
  • `A of & T1 & .. & Tn when b is true and l is [T1;...Tn].
  • The bool field is true if the tag contains a constant (empty) constructor.
  • & occurs when several types are used for the same constructor (see 4.2 in the manual)
*)
| Rinherit of core_type(*

[ | t ]

*)
and object_field = Parsetree.object_field = {
pof_desc : object_field_desc;
pof_loc : Location.t;
pof_attributes : attributes;
}
and object_field_desc = Parsetree.object_field_desc =
| Otag of string Location.loc * core_type
| Oinherit of core_type

Patterns

and pattern = Parsetree.pattern = {
ppat_desc : pattern_desc;
ppat_loc : Location.t;
ppat_loc_stack : location_stack;
ppat_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and pattern_desc = Parsetree.pattern_desc =
| Ppat_any(*

The pattern _.

*)
| Ppat_var of string Location.loc(*

A variable pattern such as x

*)
| Ppat_alias of pattern * string Location.loc(*

An alias pattern such as P as 'a

*)
| Ppat_constant of constant(*

Patterns such as 1, 'a', "true", 1.0, 1l, 1L, 1n

*)
| Ppat_interval of constant * constant(*

Patterns such as 'a'..'z'.

Other forms of interval are recognized by the parser but rejected by the type-checker.

*)
| Ppat_tuple of pattern list(*

Patterns (P1, ..., Pn).

Invariant: n >= 2

*)
| Ppat_construct of Longident.t Location.loc * (string Location.loc list * pattern) option(*

Ppat_construct(C, args) represents:

  • C when args is None,
  • C P when args is Some ([], P)
  • C (P1, ..., Pn) when args is Some ([], Ppat_tuple [P1; ...; Pn])
  • C (type a b) P when args is Some ([a; b], P)
*)
| Ppat_variant of string * pattern option(*

Ppat_variant(`A, pat) represents:

  • `A when pat is None,
  • `A P when pat is Some P
*)
| Ppat_record of (Longident.t Location.loc * pattern) list * Asttypes.closed_flag(*

Ppat_record([(l1, P1) ; ... ; (ln, Pn)], flag) represents:

  • { l1=P1; ...; ln=Pn } when flag is Closed
  • { l1=P1; ...; ln=Pn; _} when flag is Open

Invariant: n > 0

*)
| Ppat_array of pattern list(*

Pattern [| P1; ...; Pn |]

*)
| Ppat_or of pattern * pattern(*

Pattern P1 | P2

*)
| Ppat_constraint of pattern * core_type(*

Pattern (P : T)

*)
| Ppat_type of Longident.t Location.loc(*

Pattern #tconst

*)
| Ppat_lazy of pattern(*

Pattern lazy P

*)
| Ppat_unpack of string option Location.loc(*

Ppat_unpack(s) represents:

  • (module P) when s is Some "P"
  • (module _) when s is None

Note: (module P : S) is represented as Ppat_constraint(Ppat_unpack(Some "P"), Ptyp_package S)

*)
| Ppat_exception of pattern(*

Pattern exception P

*)
| Ppat_extension of extension(*

Pattern [%id]

*)
| Ppat_open of Longident.t Location.loc * pattern(*

Pattern M.(P)

*)

Value expressions

and expression = Parsetree.expression = {
pexp_desc : expression_desc;
pexp_loc : Location.t;
pexp_loc_stack : location_stack;
pexp_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and expression_desc = Parsetree.expression_desc =
| Pexp_ident of Longident.t Location.loc(*

Identifiers such as x and M.x

*)
| Pexp_constant of constant(*

Expressions constant such as 1, 'a', "true", 1.0, 1l, 1L, 1n

*)
| Pexp_let of Asttypes.rec_flag * value_binding list * expression(*

Pexp_let(flag, [(P1,E1) ; ... ; (Pn,En)], E) represents:

  • let P1 = E1 and ... and Pn = EN in E when flag is Nonrecursive,
  • let rec P1 = E1 and ... and Pn = EN in E when flag is Recursive.
*)
| Pexp_function of case list(*

function P1 -> E1 | ... | Pn -> En

*)
| Pexp_fun of Asttypes.arg_label * expression option * pattern * expression(*

Pexp_fun(lbl, exp0, P, E1) represents:

  • fun P -> E1 when lbl is Nolabel and exp0 is None
  • fun ~l:P -> E1 when lbl is Labelled l and exp0 is None
  • fun ?l:P -> E1 when lbl is Optional l and exp0 is None
  • fun ?l:(P = E0) -> E1 when lbl is Optional l and exp0 is Some E0

Notes:

  • If E0 is provided, only Optional is allowed.
  • fun P1 P2 .. Pn -> E1 is represented as nested Pexp_fun.
  • let f P = E is represented using Pexp_fun.
*)
| Pexp_apply of expression * (Asttypes.arg_label * expression) list(*

Pexp_apply(E0, [(l1, E1) ; ... ; (ln, En)]) represents E0 ~l1:E1 ... ~ln:En

li can be Nolabel (non labeled argument), Labelled (labelled arguments) or Optional (optional argument).

Invariant: n > 0

*)
| Pexp_match of expression * case list(*

match E0 with P1 -> E1 | ... | Pn -> En

*)
| Pexp_try of expression * case list(*

try E0 with P1 -> E1 | ... | Pn -> En

*)
| Pexp_tuple of expression list(*

Expressions (E1, ..., En)

Invariant: n >= 2

*)
| Pexp_construct of Longident.t Location.loc * expression option(*

Pexp_construct(C, exp) represents:

  • C when exp is None,
  • C E when exp is Some E,
  • C (E1, ..., En) when exp is Some (Pexp_tuple[E1;...;En])
*)
| Pexp_variant of string * expression option(*

Pexp_variant(`A, exp) represents

  • `A when exp is None
  • `A E when exp is Some E
*)
| Pexp_record of (Longident.t Location.loc * expression) list * expression option(*

Pexp_record([(l1,P1) ; ... ; (ln,Pn)], exp0) represents

  • { l1=P1; ...; ln=Pn } when exp0 is None
  • { E0 with l1=P1; ...; ln=Pn } when exp0 is Some E0

Invariant: n > 0

*)
| Pexp_field of expression * Longident.t Location.loc(*

E.l

*)
| Pexp_setfield of expression * Longident.t Location.loc * expression(*

E1.l <- E2

*)
| Pexp_array of expression list(*

[| E1; ...; En |]

*)
| Pexp_ifthenelse of expression * expression * expression option(*

if E1 then E2 else E3

*)
| Pexp_sequence of expression * expression(*

E1; E2

*)
| Pexp_while of expression * expression(*

while E1 do E2 done

*)
| Pexp_for of pattern * expression * expression * Asttypes.direction_flag * expression(*

Pexp_for(i, E1, E2, direction, E3) represents:

  • for i = E1 to E2 do E3 done when direction is Upto
  • for i = E1 downto E2 do E3 done when direction is Downto
*)
| Pexp_constraint of expression * core_type(*

(E : T)

*)
| Pexp_coerce of expression * core_type option * core_type(*

Pexp_coerce(E, from, T) represents

  • (E :> T) when from is None,
  • (E : T0 :> T) when from is Some T0.
*)
| Pexp_send of expression * string Location.loc(*

E # m

*)
| Pexp_new of Longident.t Location.loc(*

new M.c

*)
| Pexp_setinstvar of string Location.loc * expression(*

x <- 2

*)
| Pexp_override of (string Location.loc * expression) list(*

{< x1 = E1; ...; xn = En >}

*)
| Pexp_letmodule of string option Location.loc * module_expr * expression(*

let module M = ME in E

*)
| Pexp_letexception of extension_constructor * expression(*

let exception C in E

*)
| Pexp_assert of expression(*

assert E.

Note: assert false is treated in a special way by the type-checker.

*)
| Pexp_lazy of expression(*

lazy E

*)
| Pexp_poly of expression * core_type option(*

Used for method bodies.

Can only be used as the expression under Cfk_concrete for methods (not values).

*)
| Pexp_object of class_structure(*

object ... end

*)
| Pexp_newtype of string Location.loc * expression(*

fun (type t) -> E

*)
| Pexp_pack of module_expr(*

(module ME).

(module ME : S) is represented as Pexp_constraint(Pexp_pack ME, Ptyp_package S)

*)
| Pexp_open of open_declaration * expression(*
  • M.(E)
  • let open M in E
  • let open! M in E
*)
| Pexp_letop of letop(*
  • let* P = E0 in E1
  • let* P0 = E00 and* P1 = E01 in E1
*)
| Pexp_extension of extension(*

[%id]

*)
| Pexp_unreachable(*

.

*)
and case = Parsetree.case = {
pc_lhs : pattern;
pc_guard : expression option;
pc_rhs : expression;
}

Values of type case represents (P -> E) or (P when E0 -> E)

and letop = Parsetree.letop = {
let_ : binding_op;
ands : binding_op list;
body : expression;
}
and binding_op = Parsetree.binding_op = {
pbop_op : string Location.loc;
pbop_pat : pattern;
pbop_exp : expression;
pbop_loc : Location.t;
}

Value descriptions

and value_description = Parsetree.value_description = {
pval_name : string Location.loc;
pval_type : core_type;
pval_prim : string list;
pval_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
pval_loc : Location.t;
}

Values of type value_description represents:

  • val x: T, when pval_prim is []
  • external x: T = "s1" ... "sn" when pval_prim is ["s1";..."sn"]

Type declarations

and type_declaration = Parsetree.type_declaration = {
ptype_name : string Location.loc;
ptype_params : (core_type * (Asttypes.variance * Asttypes.injectivity)) list;(*

('a1,...'an) t

*)
ptype_cstrs : (core_type * core_type * Location.t) list;(*

... constraint T1=T1' ... constraint Tn=Tn'

*)
ptype_kind : type_kind;
ptype_private : Asttypes.private_flag;(*

for = private ...

*)
ptype_manifest : core_type option;(*

represents = T

*)
ptype_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
ptype_loc : Location.t;
}

Here are type declarations and their representation, for various ptype_kind and ptype_manifest values:

  • type t when type_kind is Ptype_abstract, and manifest is None,
  • type t = T0 when type_kind is Ptype_abstract, and manifest is Some T0,
  • type t = C of T | ... when type_kind is Ptype_variant, and manifest is None,
  • type t = T0 = C of T | ... when type_kind is Ptype_variant, and manifest is Some T0,
  • type t = {l: T; ...} when type_kind is Ptype_record, and manifest is None,
  • type t = T0 = {l : T; ...} when type_kind is Ptype_record, and manifest is Some T0,
  • type t = .. when type_kind is Ptype_open, and manifest is None.
and type_kind = Parsetree.type_kind =
| Ptype_abstract
| Ptype_variant of constructor_declaration list
| Ptype_record of label_declaration list(*

Invariant: non-empty list

*)
| Ptype_open
and label_declaration = Parsetree.label_declaration = {
pld_name : string Location.loc;
pld_mutable : Asttypes.mutable_flag;
pld_type : core_type;
pld_loc : Location.t;
pld_attributes : attributes;(*

l : T [\@id1] [\@id2]

*)
}

Note: T can be a Ptyp_poly.

and constructor_declaration = Parsetree.constructor_declaration = {
pcd_name : string Location.loc;
pcd_vars : string Location.loc list;
pcd_args : constructor_arguments;
pcd_res : core_type option;
pcd_loc : Location.t;
pcd_attributes : attributes;(*

C of ... [\@id1] [\@id2]

*)
}
and constructor_arguments = Parsetree.constructor_arguments =
| Pcstr_tuple of core_type list
| Pcstr_record of label_declaration list(*

Values of type constructor_declaration represents the constructor arguments of:

  • C of T1 * ... * Tn when res = None, and args = Pcstr_tuple [T1; ... ; Tn],
  • C: T0 when res = Some T0, and args = Pcstr_tuple [],
  • C: T1 * ... * Tn -> T0 when res = Some T0, and args = Pcstr_tuple [T1; ... ; Tn],
  • C of {...} when res = None, and args = Pcstr_record [...],
  • C: {...} -> T0 when res = Some T0, and args = Pcstr_record [...].
*)
and type_extension = Parsetree.type_extension = {
ptyext_path : Longident.t Location.loc;
ptyext_params : (core_type * (Asttypes.variance * Asttypes.injectivity)) list;
ptyext_constructors : extension_constructor list;
ptyext_private : Asttypes.private_flag;
ptyext_loc : Location.t;
ptyext_attributes : attributes;(*

... \@\@id1 \@\@id2

*)
}

Definition of new extensions constructors for the extensive sum type t (type t += ...).

and extension_constructor = Parsetree.extension_constructor = {
pext_name : string Location.loc;
pext_kind : extension_constructor_kind;
pext_loc : Location.t;
pext_attributes : attributes;(*

C of ... [\@id1] [\@id2]

*)
}
and type_exception = Parsetree.type_exception = {
ptyexn_constructor : extension_constructor;
ptyexn_loc : Location.t;
ptyexn_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
}

Definition of a new exception (exception E).

and extension_constructor_kind = Parsetree.extension_constructor_kind =
| Pext_decl of string Location.loc list * constructor_arguments * core_type option(*

Pext_decl(existentials, c_args, t_opt) describes a new extension constructor. It can be:

  • C of T1 * ... * Tn when:

    • existentials is [],
    • c_args is [T1; ...; Tn],
    • t_opt is None.
  • C: T0 when

    • existentials is [],
    • c_args is [],
    • t_opt is Some T0.
  • C: T1 * ... * Tn -> T0 when

    • existentials is [],
    • c_args is [T1; ...; Tn],
    • t_opt is Some T0.
  • C: 'a... . T1 * ... * Tn -> T0 when

    • existentials is ['a;...],
    • c_args is [T1; ... ; Tn],
    • t_opt is Some T0.
*)
| Pext_rebind of Longident.t Location.loc(*

Pext_rebind(D) re-export the constructor D with the new name C

*)

Class language

Type expressions for the class language

and class_type = Parsetree.class_type = {
pcty_desc : class_type_desc;
pcty_loc : Location.t;
pcty_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and class_type_desc = Parsetree.class_type_desc =
| Pcty_constr of Longident.t Location.loc * core_type list(*
  • c
  • ['a1, ..., 'an] c
*)
| Pcty_signature of class_signature(*

object ... end

*)
| Pcty_arrow of Asttypes.arg_label * core_type * class_type(*

Pcty_arrow(lbl, T, CT) represents:

*)
| Pcty_extension of extension(*

%id

*)
| Pcty_open of open_description * class_type(*

let open M in CT

*)
and class_signature = Parsetree.class_signature = {
pcsig_self : core_type;
pcsig_fields : class_type_field list;
}

Values of type class_signature represents:

and class_type_field = Parsetree.class_type_field = {
pctf_desc : class_type_field_desc;
pctf_loc : Location.t;
pctf_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
}
and class_type_field_desc = Parsetree.class_type_field_desc =
| Pctf_inherit of class_type(*

inherit CT

*)
| Pctf_val of string Location.loc * Asttypes.mutable_flag * Asttypes.virtual_flag * core_type(*

val x: T

*)
| Pctf_method of string Location.loc * Asttypes.private_flag * Asttypes.virtual_flag * core_type(*

method x: T

Note: T can be a Ptyp_poly.

*)
| Pctf_constraint of core_type * core_type(*

constraint T1 = T2

*)
| Pctf_attribute of attribute(*

[\@\@\@id]

*)
| Pctf_extension of extension(*

[%%id]

*)
and 'a class_infos = 'a Parsetree.class_infos = {
pci_virt : Asttypes.virtual_flag;
pci_params : (core_type * (Asttypes.variance * Asttypes.injectivity)) list;
pci_name : string Location.loc;
pci_expr : 'a;
pci_loc : Location.t;
pci_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
}

Values of type class_expr class_infos represents:

  • class c = ...
  • class ['a1,...,'an] c = ...
  • class virtual c = ...

They are also used for "class type" declaration.

and class_description = class_type class_infos
and class_type_declaration = class_type class_infos

Value expressions for the class language

and class_expr = Parsetree.class_expr = {
pcl_desc : class_expr_desc;
pcl_loc : Location.t;
pcl_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and class_expr_desc = Parsetree.class_expr_desc =
| Pcl_constr of Longident.t Location.loc * core_type list(*

c and ['a1, ..., 'an] c

*)
| Pcl_structure of class_structure(*

object ... end

*)
| Pcl_fun of Asttypes.arg_label * expression option * pattern * class_expr(*

Pcl_fun(lbl, exp0, P, CE) represents:

  • fun P -> CE when lbl is Nolabel and exp0 is None,
  • fun ~l:P -> CE when lbl is Labelled l and exp0 is None,
  • fun ?l:P -> CE when lbl is Optional l and exp0 is None,
  • fun ?l:(P = E0) -> CE when lbl is Optional l and exp0 is Some E0.
*)
| Pcl_apply of class_expr * (Asttypes.arg_label * expression) list(*

Pcl_apply(CE, [(l1,E1) ; ... ; (ln,En)]) represents CE ~l1:E1 ... ~ln:En. li can be empty (non labeled argument) or start with ? (optional argument).

Invariant: n > 0

*)
| Pcl_let of Asttypes.rec_flag * value_binding list * class_expr(*

Pcl_let(rec, [(P1, E1); ... ; (Pn, En)], CE) represents:

  • let P1 = E1 and ... and Pn = EN in CE when rec is Nonrecursive,
  • let rec P1 = E1 and ... and Pn = EN in CE when rec is Recursive.
*)
| Pcl_constraint of class_expr * class_type(*

(CE : CT)

*)
| Pcl_extension of extension(*

[%id]

*)
| Pcl_open of open_description * class_expr(*

let open M in CE

*)
and class_structure = Parsetree.class_structure = {
pcstr_self : pattern;
pcstr_fields : class_field list;
}

Values of type class_structure represents:

and class_field = Parsetree.class_field = {
pcf_desc : class_field_desc;
pcf_loc : Location.t;
pcf_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
}
and class_field_desc = Parsetree.class_field_desc =
| Pcf_inherit of Asttypes.override_flag * class_expr * string Location.loc option(*

Pcf_inherit(flag, CE, s) represents:

  • inherit CE when flag is Fresh and s is None,
  • inherit CE as x when flag is Fresh and s is Some x,
  • inherit! CE when flag is Override and s is None,
  • inherit! CE as x when flag is Override and s is Some x
*)
| Pcf_val of string Location.loc * Asttypes.mutable_flag * class_field_kind(*

Pcf_val(x,flag, kind) represents:

*)
| Pcf_method of string Location.loc * Asttypes.private_flag * class_field_kind(**)
| Pcf_constraint of core_type * core_type(*

constraint T1 = T2

*)
| Pcf_initializer of expression(*

initializer E

*)
| Pcf_attribute of attribute(*

[\@\@\@id]

*)
| Pcf_extension of extension(*

[%%id]

*)
and class_field_kind = Parsetree.class_field_kind =
| Cfk_virtual of core_type
| Cfk_concrete of Asttypes.override_flag * expression
and class_declaration = class_expr class_infos

Module language

Type expressions for the module language

and module_type = Parsetree.module_type = {
pmty_desc : module_type_desc;
pmty_loc : Location.t;
pmty_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and module_type_desc = Parsetree.module_type_desc =
| Pmty_ident of Longident.t Location.loc(*

Pmty_ident(S) represents S

*)
| Pmty_signature of signature(*

sig ... end

*)
| Pmty_functor of functor_parameter * module_type(*

functor(X : MT1) -> MT2

*)
| Pmty_with of module_type * with_constraint list(*

MT with ...

*)
| Pmty_typeof of module_expr(*

module type of ME

*)
| Pmty_extension of extension(*

[%id]

*)
| Pmty_alias of Longident.t Location.loc(*

(module M)

*)
and functor_parameter = Parsetree.functor_parameter =
| Unit(*

()

*)
| Named of string option Location.loc * module_type(*

Named(name, MT) represents:

  • (X : MT) when name is Some X,
  • (_ : MT) when name is None
*)
and signature = signature_item list
and signature_item = Parsetree.signature_item = {
psig_desc : signature_item_desc;
psig_loc : Location.t;
}
and signature_item_desc = Parsetree.signature_item_desc =
| Psig_value of value_description(*
  • val x: T
  • external x: T = "s1" ... "sn"
*)
| Psig_type of Asttypes.rec_flag * type_declaration list(*

type t1 = ... and ... and tn = ...

*)
| Psig_typesubst of type_declaration list(*

type t1 := ... and ... and tn := ...

*)
| Psig_typext of type_extension(*

type t1 += ...

*)
| Psig_exception of type_exception(*

exception C of T

*)
| Psig_module of module_declaration(*

module X = M and module X : MT

*)
| Psig_modsubst of module_substitution(*

module X := M

*)
| Psig_recmodule of module_declaration list(*

module rec X1 : MT1 and ... and Xn : MTn

*)
| Psig_modtype of module_type_declaration(*

module type S = MT and module type S

*)
| Psig_modtypesubst of module_type_declaration(*

module type S := ...

*)
| Psig_open of open_description(*

open X

*)
| Psig_include of include_description(*

include MT

*)
| Psig_class of class_description list(*

class c1 : ... and ... and cn : ...

*)
| Psig_class_type of class_type_declaration list(*

class type ct1 = ... and ... and ctn = ...

*)
| Psig_attribute of attribute(*

[\@\@\@id]

*)
| Psig_extension of extension * attributes(*

[%%id]

*)
and module_declaration = Parsetree.module_declaration = {
pmd_name : string option Location.loc;
pmd_type : module_type;
pmd_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
pmd_loc : Location.t;
}

Values of type module_declaration represents S : MT

and module_substitution = Parsetree.module_substitution = {
pms_name : string Location.loc;
pms_manifest : Longident.t Location.loc;
pms_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
pms_loc : Location.t;
}

Values of type module_substitution represents S := M

and module_type_declaration = Parsetree.module_type_declaration = {
pmtd_name : string Location.loc;
pmtd_type : module_type option;
pmtd_attributes : attributes;(*

... [\@\@id1] [\@\@id2]

*)
pmtd_loc : Location.t;
}

Values of type module_type_declaration represents:

  • S = MT,
  • S for abstract module type declaration, when pmtd_type is None.
and 'a open_infos = 'a Parsetree.open_infos = {
popen_expr : 'a;
popen_override : Asttypes.override_flag;
popen_loc : Location.t;
popen_attributes : attributes;
}

Values of type 'a open_infos represents:

and open_description = Longident.t Location.loc open_infos

Values of type open_description represents:

  • open M.N
  • open M(N).O
and open_declaration = module_expr open_infos

Values of type open_declaration represents:

  • open M.N
  • open M(N).O
  • open struct ... end
and 'a include_infos = 'a Parsetree.include_infos = {
pincl_mod : 'a;
pincl_loc : Location.t;
pincl_attributes : attributes;
}
and include_description = module_type include_infos

Values of type include_description represents include MT

and include_declaration = module_expr include_infos

Values of type include_declaration represents include ME

and with_constraint = Parsetree.with_constraint =
| Pwith_type of Longident.t Location.loc * type_declaration(*

with type X.t = ...

Note: the last component of the longident must match the name of the type_declaration.

*)
| Pwith_module of Longident.t Location.loc * Longident.t Location.loc(*

with module X.Y = Z

*)
| Pwith_modtype of Longident.t Location.loc * module_type(*

with module type X.Y = Z

*)
| Pwith_modtypesubst of Longident.t Location.loc * module_type(*

with module type X.Y := sig end

*)
| Pwith_typesubst of Longident.t Location.loc * type_declaration(*

with type X.t := ..., same format as [Pwith_type]

*)
| Pwith_modsubst of Longident.t Location.loc * Longident.t Location.loc(*

with module X.Y := Z

*)

Value expressions for the module language

and module_expr = Parsetree.module_expr = {
pmod_desc : module_expr_desc;
pmod_loc : Location.t;
pmod_attributes : attributes;(*

... [\@id1] [\@id2]

*)
}
and module_expr_desc = Parsetree.module_expr_desc =
| Pmod_ident of Longident.t Location.loc(*

X

*)
| Pmod_structure of structure(*

struct ... end

*)
| Pmod_functor of functor_parameter * module_expr(*

functor(X : MT1) -> ME

*)
| Pmod_apply of module_expr * module_expr(*

ME1(ME2)

*)
| Pmod_constraint of module_expr * module_type(*

(ME : MT)

*)
| Pmod_unpack of expression(*

(val E)

*)
| Pmod_extension of extension(*

[%id]

*)
and structure = structure_item list
and structure_item = Parsetree.structure_item = {
pstr_desc : structure_item_desc;
pstr_loc : Location.t;
}
and structure_item_desc = Parsetree.structure_item_desc =
| Pstr_eval of expression * attributes(*

E

*)
| Pstr_value of Asttypes.rec_flag * value_binding list(*

Pstr_value(rec, [(P1, E1 ; ... ; (Pn, En))]) represents:

  • let P1 = E1 and ... and Pn = EN when rec is Nonrecursive,
  • let rec P1 = E1 and ... and Pn = EN when rec is Recursive.
*)
| Pstr_primitive of value_description(*
  • val x: T
  • external x: T = "s1" ... "sn"
*)
| Pstr_type of Asttypes.rec_flag * type_declaration list(*

type t1 = ... and ... and tn = ...

*)
| Pstr_typext of type_extension(*

type t1 += ...

*)
| Pstr_exception of type_exception(*
  • exception C of T
  • exception C = M.X
*)
| Pstr_module of module_binding(*

module X = ME

*)
| Pstr_recmodule of module_binding list(*

module rec X1 = ME1 and ... and Xn = MEn

*)
| Pstr_modtype of module_type_declaration(*

module type S = MT

*)
| Pstr_open of open_declaration(*

open X

*)
| Pstr_class of class_declaration list(*

class c1 = ... and ... and cn = ...

*)
| Pstr_class_type of class_type_declaration list(*

class type ct1 = ... and ... and ctn = ...

*)
| Pstr_include of include_declaration(*

include ME

*)
| Pstr_attribute of attribute(*

[\@\@\@id]

*)
| Pstr_extension of extension * attributes(*

[%%id]

*)
and value_binding = Parsetree.value_binding = {
pvb_pat : pattern;
pvb_expr : expression;
pvb_attributes : attributes;
pvb_loc : Location.t;
}
and module_binding = Parsetree.module_binding = {
pmb_name : string option Location.loc;
pmb_expr : module_expr;
pmb_attributes : attributes;
pmb_loc : Location.t;
}

Values of type module_binding represents module X = ME

Toplevel

Toplevel phrases

type toplevel_phrase = Parsetree.toplevel_phrase =
| Ptop_def of structure
| Ptop_dir of toplevel_directive(*

#use, #load ...

*)
and toplevel_directive = Parsetree.toplevel_directive = {
pdir_name : string Location.loc;
pdir_arg : directive_argument option;
pdir_loc : Location.t;
}
and directive_argument = Parsetree.directive_argument = {
pdira_desc : directive_argument_desc;
pdira_loc : Location.t;
}
and directive_argument_desc = Parsetree.directive_argument_desc =
| Pdir_string of string
| Pdir_int of string * char option
| Pdir_ident of Longident.t
| Pdir_bool of bool