package ocamlformat-lib

  1. Overview
  2. Docs
package ocamlformat-lib
Legend:
Library
Module
Module type
Parameter
Class
Class type
include module type of Parser_extended.Parsetree
type constant_desc =
  1. | 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

    *)
  2. | Pconst_char of char * string
    (*

    Pconst_char (c, s) describes a character c and its literal string representation s.

    e.g. the character '\n' is represented by the literal string "\\n".

    *)
  3. | Pconst_string of string * Ocaml_common.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.

    *)
  4. | 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 constant = {
  1. pconst_desc : constant_desc;
  2. pconst_loc : Ocaml_common.Location.t;
}
type location_stack = Ocaml_common.Location.t list

Extension points

type attribute = {
  1. attr_name : string Parser_extended.Asttypes.loc;
  2. attr_payload : payload;
  3. attr_loc : Ocaml_common.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 Parser_extended.Asttypes.loc * payload

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

Sub-language placeholder -- rejected by the typechecker.

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

    : SIG in an attribute or an extension point

    *)
  3. | PTyp of core_type
    (*

    : T in an attribute or an extension point

    *)
  4. | PPat of pattern * expression option
    (*

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

    *)

Core language

Type expressions

and core_type = {
  1. ptyp_desc : core_type_desc;
  2. ptyp_loc : Ocaml_common.Location.t;
  3. ptyp_loc_stack : location_stack;
  4. ptyp_attributes : attributes;
    (*

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

    *)
}
and arrow_param = {
  1. pap_label : Parser_extended.Asttypes.arg_label;
  2. pap_loc : Ocaml_common.Location.t;
    (*

    Location also including the codomain.

    *)
  3. pap_type : core_type;
}
and core_type_desc =
  1. | Ptyp_any
    (*

    _

    *)
  2. | Ptyp_var of string
    (*

    A type variable such as 'a

    *)
  3. | Ptyp_arrow of arrow_param list * core_type
    (*

    Ptyp_arrow(lbl, T1, T2) represents:

    *)
  4. | Ptyp_tuple of core_type list
    (*

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

    Invariant: n >= 2.

    *)
  5. | Ptyp_constr of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * core_type list
    (*

    Ptyp_constr(lident, l) represents:

    • tconstr when l=[],
    • T tconstr when l=[T],
    • (T1, ..., Tn) tconstr when l=[T1 ; ... ; Tn].
    *)
  6. | Ptyp_object of object_field list * Parser_extended.Asttypes.obj_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.
    *)
  7. | Ptyp_class of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * core_type list
    (*

    Ptyp_class(tconstr, l) represents:

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

    T as 'a.

    *)
  9. | Ptyp_variant of row_field list * Parser_extended.Asttypes.closed_flag * Parser_extended.Asttypes.variant_var 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"].
    *)
  10. | Ptyp_poly of string Parser_extended.Asttypes.loc list * core_type
    (*

    'a1 ... 'an. T

    Can only appear in the following context:

    • As the core_type of a Ppat_constraint node corresponding to a constraint on a let-binding:

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

    (module S).

    *)
  12. | 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 = {
  1. prf_desc : row_field_desc;
  2. prf_loc : Ocaml_common.Location.t;
  3. prf_attributes : attributes;
}
and row_field_desc =
  1. | Rtag of Parser_extended.Asttypes.variant_var * 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)
    *)
  2. | Rinherit of core_type
    (*

    [ | t ]

    *)
and object_field = {
  1. pof_desc : object_field_desc;
  2. pof_loc : Ocaml_common.Location.t;
  3. pof_attributes : attributes;
}
and object_field_desc =
  1. | Otag of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * core_type
  2. | Oinherit of core_type

Patterns

and pattern = {
  1. ppat_desc : pattern_desc;
  2. ppat_loc : Ocaml_common.Location.t;
  3. ppat_loc_stack : location_stack;
  4. ppat_attributes : attributes;
    (*

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

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

    The pattern _.

    *)
  2. | Ppat_var of string Parser_extended.Asttypes.loc
    (*

    A variable pattern such as x

    *)
  3. | Ppat_alias of pattern * string Parser_extended.Asttypes.loc
    (*

    An alias pattern such as P as 'a

    *)
  4. | Ppat_constant of constant
    (*

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

    *)
  5. | 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.

    *)
  6. | Ppat_tuple of pattern list
    (*

    Patterns (P1, ..., Pn).

    Invariant: n >= 2

    *)
  7. | Ppat_construct of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * (string Parser_extended.Asttypes.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)
    *)
  8. | Ppat_variant of Parser_extended.Asttypes.variant_var * pattern option
    (*

    Ppat_variant(`A, pat) represents:

    • `A when pat is None,
    • `A P when pat is Some P
    *)
  9. | Ppat_record of (Ocaml_common.Longident.t Parser_extended.Asttypes.loc * core_type option * pattern option) list * Parser_extended.Asttypes.obj_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

    *)
  10. | Ppat_array of pattern list
    (*

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

    *)
  11. | Ppat_list of pattern list
    (*

    Pattern [ P1; ...; Pn ]

    *)
  12. | Ppat_or of pattern list
    (*

    Pattern P1 | ... | Pn

    *)
  13. | Ppat_constraint of pattern * core_type
    (*

    Pattern (P : T)

    *)
  14. | Ppat_type of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    Pattern #tconst

    *)
  15. | Ppat_lazy of pattern
    (*

    Pattern lazy P

    *)
  16. | Ppat_unpack of string option Parser_extended.Asttypes.loc * package_type option
    (*

    Ppat_unpack(p, s) represents:

    • (module P) when p is Some "P" and s is None
    • (module _) when p is None and s is None
    • (module P : S) when p is Some "P" and s is Some "S"
    • (module _ : S) when p is None and s is Some "S"
    *)
  17. | Ppat_exception of pattern
    (*

    Pattern exception P

    *)
  18. | Ppat_extension of extension
    (*

    Pattern [%id]

    *)
  19. | Ppat_open of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * pattern
    (*

    Pattern M.(P)

    *)
  20. | Ppat_cons of pattern list
    (*

    Pattern P1 :: ... :: Pn

    *)

Value expressions

and expression = {
  1. pexp_desc : expression_desc;
  2. pexp_loc : Ocaml_common.Location.t;
  3. pexp_loc_stack : location_stack;
  4. pexp_attributes : attributes;
    (*

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

    *)
}
and expression_desc =
  1. | Pexp_ident of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    Identifiers such as x and M.x

    *)
  2. | Pexp_constant of constant
    (*

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

    *)
  3. | Pexp_let of let_bindings * 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.
    *)
  4. | Pexp_function of case list
    (*

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

    *)
  5. | Pexp_fun of Parser_extended.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.
    *)
  6. | Pexp_apply of expression * (Parser_extended.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

    *)
  7. | Pexp_match of expression * case list
    (*

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

    *)
  8. | Pexp_try of expression * case list
    (*

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

    *)
  9. | Pexp_tuple of expression list
    (*

    Expressions (E1, ..., En)

    Invariant: n >= 2

    *)
  10. | Pexp_construct of Ocaml_common.Longident.t Parser_extended.Asttypes.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])
    *)
  11. | Pexp_variant of Parser_extended.Asttypes.variant_var * expression option
    (*

    Pexp_variant(`A, exp) represents

    • `A when exp is None
    • `A E when exp is Some E
    *)
  12. | Pexp_record of (Ocaml_common.Longident.t Parser_extended.Asttypes.loc * (core_type option * core_type option) * expression option) 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

    *)
  13. | Pexp_field of expression * Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    E.l

    *)
  14. | Pexp_setfield of expression * Ocaml_common.Longident.t Parser_extended.Asttypes.loc * expression
    (*

    E1.l <- E2

    *)
  15. | Pexp_array of expression list
    (*

    [| E1; ...; En |]

    *)
  16. | Pexp_list of expression list
    (*

    [ E1; ...; En ]

    *)
  17. | Pexp_ifthenelse of if_branch list * expression option
    (*

    if E1 then E2 else E3

    *)
  18. | Pexp_sequence of expression * expression
    (*

    E1; E2

    *)
  19. | Pexp_while of expression * expression
    (*

    while E1 do E2 done

    *)
  20. | Pexp_for of pattern * expression * expression * Parser_extended.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
    *)
  21. | Pexp_constraint of expression * core_type
    (*

    (E : T)

    *)
  22. | 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.
    *)
  23. | Pexp_send of expression * Parser_extended.Asttypes.label Parser_extended.Asttypes.loc
    (*

    E # m

    *)
  24. | Pexp_new of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    new M.c

    *)
  25. | Pexp_setinstvar of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * expression
    (*

    x <- 2

    *)
  26. | Pexp_override of (Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * expression) list
    (*

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

    *)
  27. | Pexp_letmodule of string option Parser_extended.Asttypes.loc * functor_parameter Parser_extended.Asttypes.loc list * module_expr * expression
    (*

    let module M = ME in E

    *)
  28. | Pexp_letexception of extension_constructor * expression
    (*

    let exception C in E

    *)
  29. | Pexp_assert of expression
    (*

    assert E.

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

    *)
  30. | Pexp_lazy of expression
    (*

    lazy E

    *)
  31. | 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).

    *)
  32. | Pexp_object of class_structure
    (*

    object ... end

    *)
  33. | Pexp_newtype of string Parser_extended.Asttypes.loc * expression
    (*

    fun (type t) -> E

    *)
  34. | Pexp_pack of module_expr * package_type option
    (*
    • (module M) is represented as Pexp_pack(M, None)
    • (module M : S) is represented as Pexp_pack(M, Some S)
    *)
  35. | Pexp_open of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * expression
    (*

    M.(E)

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

    [%id]

    *)
  39. | Pexp_unreachable
    (*

    .

    *)
  40. | Pexp_hole
    (*

    _

    *)
  41. | Pexp_beginend of expression
    (*

    begin E end

    *)
  42. | Pexp_parens of expression
    (*

    (E)

    *)
  43. | Pexp_cons of expression list
    (*

    E1 :: ... :: En

    *)
  44. | Pexp_indexop_access of indexop_access
  45. | Pexp_prefix of string Parser_extended.Asttypes.loc * expression
    (*

    op E

    *)
  46. | Pexp_infix of string Parser_extended.Asttypes.loc * expression * expression
    (*

    E1 op E2

    *)
and indexop_access = {
  1. pia_lhs : expression;
  2. pia_kind : indexop_access_kind;
  3. pia_paren : Parser_extended.Asttypes.paren_kind;
  4. pia_rhs : expression option;
}
and indexop_access_kind =
  1. | Builtin of expression
    (*

    arr.(i) arr.(i) <- e str.[i] str.[i] <- c bar.{i1; i2; ..} bar.{i1; i2; ..} <- e

    *)
  2. | Dotop of Ocaml_common.Longident.t Parser_extended.Asttypes.loc option * string * expression list
    (*

    foo.Path.%{i1, i2, ..} <- e

    *)
and if_branch = {
  1. if_cond : expression;
  2. if_body : expression;
  3. if_attrs : attributes;
    (*

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

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

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

and letop = {
  1. let_ : binding_op;
  2. ands : binding_op list;
  3. body : expression;
}
and binding_op = {
  1. pbop_op : string Parser_extended.Asttypes.loc;
  2. pbop_pat : pattern;
  3. pbop_exp : expression;
  4. pbop_loc : Ocaml_common.Location.t;
}

Value descriptions

and value_description = {
  1. pval_name : string Parser_extended.Asttypes.loc;
  2. pval_type : core_type;
  3. pval_prim : string Parser_extended.Asttypes.loc list;
  4. pval_attributes : attributes;
    (*

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

    *)
  5. pval_loc : Ocaml_common.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 = {
  1. ptype_name : string Parser_extended.Asttypes.loc;
  2. ptype_params : (core_type * Parser_extended.Asttypes.variance_and_injectivity) list;
    (*

    ('a1,...'an) t

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

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

    *)
  4. ptype_kind : type_kind;
  5. ptype_private : Parser_extended.Asttypes.private_flag;
    (*

    for = private ...

    *)
  6. ptype_manifest : core_type option;
    (*

    represents = T

    *)
  7. ptype_attributes : attributes;
    (*

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

    *)
  8. ptype_loc : Ocaml_common.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 =
  1. | Ptype_abstract
  2. | Ptype_variant of constructor_declaration list
  3. | Ptype_record of label_declaration list
    (*

    Invariant: non-empty list

    *)
  4. | Ptype_open
and label_declaration = {
  1. pld_name : string Parser_extended.Asttypes.loc;
  2. pld_mutable : Parser_extended.Asttypes.mutable_flag;
  3. pld_type : core_type;
  4. pld_loc : Ocaml_common.Location.t;
  5. pld_attributes : attributes;
    (*

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

    *)
}

Note: T can be a Ptyp_poly.

and constructor_declaration = {
  1. pcd_name : string Parser_extended.Asttypes.loc;
  2. pcd_vars : string Parser_extended.Asttypes.loc list;
  3. pcd_args : constructor_arguments;
  4. pcd_res : core_type option;
  5. pcd_loc : Ocaml_common.Location.t;
  6. pcd_attributes : attributes;
    (*

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

    *)
}
and constructor_arguments =
  1. | Pcstr_tuple of core_type list
  2. | Pcstr_record of Ocaml_common.Location.t * 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 = {
  1. ptyext_path : Ocaml_common.Longident.t Parser_extended.Asttypes.loc;
  2. ptyext_params : (core_type * Parser_extended.Asttypes.variance_and_injectivity) list;
  3. ptyext_constructors : extension_constructor list;
  4. ptyext_private : Parser_extended.Asttypes.private_flag;
  5. ptyext_loc : Ocaml_common.Location.t;
  6. ptyext_attributes : attributes;
    (*

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

    *)
}

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

and extension_constructor = {
  1. pext_name : string Parser_extended.Asttypes.loc;
  2. pext_kind : extension_constructor_kind;
  3. pext_loc : Ocaml_common.Location.t;
  4. pext_attributes : attributes;
    (*

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

    *)
}
and type_exception = {
  1. ptyexn_constructor : extension_constructor;
  2. ptyexn_loc : Ocaml_common.Location.t;
  3. ptyexn_attributes : attributes;
    (*

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

    *)
}

Definition of a new exception (exception E).

and extension_constructor_kind =
  1. | Pext_decl of string Parser_extended.Asttypes.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.
    *)
  2. | Pext_rebind of Ocaml_common.Longident.t Parser_extended.Asttypes.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 = {
  1. pcty_desc : class_type_desc;
  2. pcty_loc : Ocaml_common.Location.t;
  3. pcty_attributes : attributes;
    (*

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

    *)
}
and class_type_desc =
  1. | Pcty_constr of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * core_type list
    (*
    • c
    • ['a1, ..., 'an] c
    *)
  2. | Pcty_signature of class_signature
    (*

    object ... end

    *)
  3. | Pcty_arrow of arrow_param list * class_type
    (*

    Pcty_arrow(lbl, T, CT) represents:

    *)
  4. | Pcty_extension of extension
    (*

    %id

    *)
  5. | Pcty_open of open_description * class_type
    (*

    let open M in CT

    *)
and class_signature = {
  1. pcsig_self : core_type option;
  2. pcsig_fields : class_type_field list;
}

Values of type class_signature represents:

  • object('selfpat) ... end
  • object ... end when pcsig_self is None
and class_type_field = {
  1. pctf_desc : class_type_field_desc;
  2. pctf_loc : Ocaml_common.Location.t;
  3. pctf_attributes : attributes;
    (*

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

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

    inherit CT

    *)
  2. | Pctf_val of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * Parser_extended.Asttypes.mutable_virtual * core_type
    (*

    val x: T

    *)
  3. | Pctf_method of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * Parser_extended.Asttypes.private_virtual * core_type
    (*

    method x: T

    Note: T can be a Ptyp_poly.

    *)
  4. | Pctf_constraint of core_type * core_type
    (*

    constraint T1 = T2

    *)
  5. | Pctf_attribute of attribute
    (*

    [\@\@\@id]

    *)
  6. | Pctf_extension of extension
    (*

    [%%id]

    *)
and 'a class_infos = {
  1. pci_virt : Parser_extended.Asttypes.virtual_flag;
  2. pci_params : (core_type * Parser_extended.Asttypes.variance_and_injectivity) list;
  3. pci_name : string Parser_extended.Asttypes.loc;
  4. pci_expr : 'a;
  5. pci_loc : Ocaml_common.Location.t;
  6. 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 = {
  1. pcl_desc : class_expr_desc;
  2. pcl_loc : Ocaml_common.Location.t;
  3. pcl_attributes : attributes;
    (*

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

    *)
}
and class_expr_desc =
  1. | Pcl_constr of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * core_type list
    (*

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

    *)
  2. | Pcl_structure of class_structure
    (*

    object ... end

    *)
  3. | Pcl_fun of Parser_extended.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.
    *)
  4. | Pcl_apply of class_expr * (Parser_extended.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

    *)
  5. | Pcl_let of let_bindings * 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.
    *)
  6. | Pcl_constraint of class_expr * class_type
    (*

    (CE : CT)

    *)
  7. | Pcl_extension of extension
    (*

    [%id]

    *)
  8. | Pcl_open of open_description * class_expr
    (*

    let open M in CE

    *)
and class_structure = {
  1. pcstr_self : pattern option;
  2. pcstr_fields : class_field list;
}

Values of type class_structure represents:

  • object(selfpat) ... end
  • object ... end when pcstr_self is None
and class_field = {
  1. pcf_desc : class_field_desc;
  2. pcf_loc : Ocaml_common.Location.t;
  3. pcf_attributes : attributes;
    (*

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

    *)
}
and class_field_desc =
  1. | Pcf_inherit of Parser_extended.Asttypes.override_flag * class_expr * string Parser_extended.Asttypes.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
    *)
  2. | Pcf_val of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * Parser_extended.Asttypes.mutable_virtual * class_field_kind
    (*

    Pcf_val(x,flag, kind) represents:

    *)
  3. | Pcf_method of Parser_extended.Asttypes.label Parser_extended.Asttypes.loc * Parser_extended.Asttypes.private_virtual * class_field_kind
    (**)
  4. | Pcf_constraint of core_type * core_type
    (*

    constraint T1 = T2

    *)
  5. | Pcf_initializer of expression
    (*

    initializer E

    *)
  6. | Pcf_attribute of attribute
    (*

    [\@\@\@id]

    *)
  7. | Pcf_extension of extension
    (*

    [%%id]

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

Module language

Type expressions for the module language

and module_type = {
  1. pmty_desc : module_type_desc;
  2. pmty_loc : Ocaml_common.Location.t;
  3. pmty_attributes : attributes;
    (*

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

    *)
}
and module_type_desc =
  1. | Pmty_ident of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    Pmty_ident(S) represents S

    *)
  2. | Pmty_signature of signature
    (*

    sig ... end

    *)
  3. | Pmty_functor of functor_parameter Parser_extended.Asttypes.loc list * module_type
    (*

    functor (X1 : MT1) ... (Xn : MTn) -> MT

    *)
  4. | Pmty_gen of Ocaml_common.Location.t * module_type
    (*

    () -> MT

    *)
  5. | Pmty_with of module_type * with_constraint list
    (*

    MT with ...

    *)
  6. | Pmty_typeof of module_expr
    (*

    module type of ME

    *)
  7. | Pmty_extension of extension
    (*

    [%id]

    *)
  8. | Pmty_alias of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    (module M)

    *)
and functor_parameter =
  1. | Unit
    (*

    ()

    *)
  2. | Named of string option Parser_extended.Asttypes.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 = {
  1. psig_desc : signature_item_desc;
  2. psig_loc : Ocaml_common.Location.t;
}
and signature_item_desc =
  1. | Psig_value of value_description
    (*
    • val x: T
    • external x: T = "s1" ... "sn"
    *)
  2. | Psig_type of Parser_extended.Asttypes.rec_flag * type_declaration list
    (*

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

    *)
  3. | Psig_typesubst of type_declaration list
    (*

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

    *)
  4. | Psig_typext of type_extension
    (*

    type t1 += ...

    *)
  5. | Psig_exception of type_exception
    (*

    exception C of T

    *)
  6. | Psig_module of module_declaration
    (*

    module X = M and module X : MT

    *)
  7. | Psig_modsubst of module_substitution
    (*

    module X := M

    *)
  8. | Psig_recmodule of module_declaration list
    (*

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

    *)
  9. | Psig_modtype of module_type_declaration
    (*

    module type S = MT and module type S

    *)
  10. | Psig_modtypesubst of module_type_declaration
    (*

    module type S := ...

    *)
  11. | Psig_open of open_description
    (*

    open X

    *)
  12. | Psig_include of include_description
    (*

    include MT

    *)
  13. | Psig_class of class_description list
    (*

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

    *)
  14. | Psig_class_type of class_type_declaration list
    (*

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

    *)
  15. | Psig_attribute of attribute
    (*

    [\@\@\@id]

    *)
  16. | Psig_extension of extension * attributes
    (*

    [%%id]

    *)
and module_declaration = {
  1. pmd_name : string option Parser_extended.Asttypes.loc;
  2. pmd_args : functor_parameter Parser_extended.Asttypes.loc list;
  3. pmd_type : module_type;
  4. pmd_attributes : attributes;
    (*

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

    *)
  5. pmd_loc : Ocaml_common.Location.t;
}

Values of type module_declaration represents S : MT

and module_substitution = {
  1. pms_name : string Parser_extended.Asttypes.loc;
  2. pms_manifest : Ocaml_common.Longident.t Parser_extended.Asttypes.loc;
  3. pms_attributes : attributes;
    (*

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

    *)
  4. pms_loc : Ocaml_common.Location.t;
}

Values of type module_substitution represents S := M

and module_type_declaration = {
  1. pmtd_name : string Parser_extended.Asttypes.loc;
  2. pmtd_type : module_type option;
  3. pmtd_attributes : attributes;
    (*

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

    *)
  4. pmtd_loc : Ocaml_common.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 = {
  1. popen_expr : 'a;
  2. popen_override : Parser_extended.Asttypes.override_flag;
  3. popen_loc : Ocaml_common.Location.t;
  4. popen_attributes : attributes;
}

Values of type 'a open_infos represents:

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 = {
  1. pincl_mod : 'a;
  2. pincl_loc : Ocaml_common.Location.t;
  3. 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 =
  1. | Pwith_type of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * type_declaration
    (*

    with type X.t = ...

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

    *)
  2. | Pwith_module of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    with module X.Y = Z

    *)
  3. | Pwith_modtype of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * module_type
    (*

    with module type X.Y = Z

    *)
  4. | Pwith_modtypesubst of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * module_type
    (*

    with module type X.Y := sig end

    *)
  5. | Pwith_typesubst of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * type_declaration
    (*

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

    *)
  6. | Pwith_modsubst of Ocaml_common.Longident.t Parser_extended.Asttypes.loc * Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    with module X.Y := Z

    *)

Value expressions for the module language

and module_expr = {
  1. pmod_desc : module_expr_desc;
  2. pmod_loc : Ocaml_common.Location.t;
  3. pmod_attributes : attributes;
    (*

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

    *)
}
and module_expr_desc =
  1. | Pmod_ident of Ocaml_common.Longident.t Parser_extended.Asttypes.loc
    (*

    X

    *)
  2. | Pmod_structure of structure
    (*

    struct ... end

    *)
  3. | Pmod_functor of functor_parameter Parser_extended.Asttypes.loc list * module_expr
    (*

    functor (X1 : MT1) ... (Xn : MTn) -> ME

    *)
  4. | Pmod_apply of module_expr * module_expr
    (*

    ME1(ME2)

    *)
  5. | Pmod_constraint of module_expr * module_type
    (*

    (ME : MT)

    *)
  6. | Pmod_unpack of expression * package_type option * package_type option
    (*

    (val E : M1 :> M2)

    *)
  7. | Pmod_gen_apply of module_expr * Ocaml_common.Location.t
    (*

    ME()

    *)
  8. | Pmod_extension of extension
    (*

    [%id]

    *)
  9. | Pmod_hole
    (*

    _

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

    E

    *)
  2. | Pstr_value of let_bindings
    (*

    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.
    *)
  3. | Pstr_primitive of value_description
    (*
    • val x: T
    • external x: T = "s1" ... "sn"
    *)
  4. | Pstr_type of Parser_extended.Asttypes.rec_flag * type_declaration list
    (*

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

    *)
  5. | Pstr_typext of type_extension
    (*

    type t1 += ...

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

    module X = ME

    *)
  8. | Pstr_recmodule of module_binding list
    (*

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

    *)
  9. | Pstr_modtype of module_type_declaration
    (*

    module type S = MT

    *)
  10. | Pstr_open of open_declaration
    (*

    open X

    *)
  11. | Pstr_class of class_declaration list
    (*

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

    *)
  12. | Pstr_class_type of class_type_declaration list
    (*

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

    *)
  13. | Pstr_include of include_declaration
    (*

    include ME

    *)
  14. | Pstr_attribute of attribute
    (*

    [\@\@\@id]

    *)
  15. | Pstr_extension of extension * attributes
    (*

    [%%id]

    *)
and let_binding = {
  1. lb_pattern : pattern;
  2. lb_expression : expression;
  3. lb_is_pun : bool;
  4. lb_attributes : attributes;
  5. lb_loc : Ocaml_common.Location.t;
}
and let_bindings = {
  1. lbs_bindings : let_binding list;
  2. lbs_rec : Parser_extended.Asttypes.rec_flag;
  3. lbs_extension : string Parser_extended.Asttypes.loc option;
}
and module_binding = {
  1. pmb_name : string option Parser_extended.Asttypes.loc;
  2. pmb_args : functor_parameter Parser_extended.Asttypes.loc list;
  3. pmb_expr : module_expr;
  4. pmb_attributes : attributes;
  5. pmb_loc : Ocaml_common.Location.t;
}

Values of type module_binding represents module X = ME

Toplevel

Toplevel phrases

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

    #use, #load ...

    *)
and toplevel_directive = {
  1. pdir_name : string Parser_extended.Asttypes.loc;
  2. pdir_arg : directive_argument option;
  3. pdir_loc : Ocaml_common.Location.t;
}
and directive_argument = {
  1. pdira_desc : directive_argument_desc;
  2. pdira_loc : Ocaml_common.Location.t;
}
and directive_argument_desc =
  1. | Pdir_string of string
  2. | Pdir_int of string * char option
  3. | Pdir_ident of Ocaml_common.Longident.t
  4. | Pdir_bool of bool
type repl_phrase = {
  1. prepl_phrase : toplevel_phrase;
  2. prepl_output : string;
}
type 'a t =
  1. | Structure : structure t
  2. | Signature : signature t
  3. | Use_file : use_file t
  4. | Core_type : core_type t
  5. | Module_type : module_type t
  6. | Expression : expression t
  7. | Repl_file : repl_file t
  8. | Documentation : Odoc_parser.Ast.t t
type any_t =
  1. | Any : 'a t -> any_t
val of_syntax : Syntax.t -> any_t
module Parse : sig ... end
val equal_core_type : core_type -> core_type -> Ocamlformat_stdlib.bool
val equal : 'a t -> 'a -> 'a -> Ocamlformat_stdlib.bool
val map : 'a t -> Parser_extended.Ast_mapper.mapper -> 'a -> 'a
module Printast : sig ... end
module Asttypes : sig ... end
OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct