Provided by: ocaml-man_4.14.1-1ubuntu1_all 
NAME
Parsetree - Abstract syntax tree produced by parsing
Module
Module Parsetree
Documentation
Module Parsetree
: sig end
Abstract syntax tree produced by parsing
Warning: this module is unstable and part of Compiler_libs .
type 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-z G-Z are accepted by the parser. Suffixes are rejected by the typechecker.
*)
type location_stack = Location.t list
Extension points
type attribute = {
attr_name : string Asttypes.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.
type extension = string Asttypes.loc * payload
Extension points such as [%id ARG] and [%%id ARG] .
Sub-language placeholder -- rejected by the typechecker.
type attributes = attribute list
type 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
type core_type = {
ptyp_desc : core_type_desc ;
ptyp_loc : Location.t ;
ptyp_loc_stack : location_stack ;
ptyp_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type 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:
- T1 -> T2 when lbl is Asttypes.arg_label.Nolabel ,
- ~l:T1 -> T2 when lbl is Asttypes.arg_label.Labelled ,
- ?l:T1 -> T2 when lbl is Asttypes.arg_label.Optional .
*)
| Ptyp_tuple of core_type list
(* Ptyp_tuple([T1 ; ... ; Tn]) represents a product type T1 * ... * Tn .
Invariant: n >= 2 .
*)
| Ptyp_constr of Longident.t 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] .
*)
| Ptyp_object of object_field list * Asttypes.closed_flag
(* Ptyp_object([ l1:T1; ...; ln:Tn ], flag) represents:
- < l1:T1; ...; ln:Tn > when flag is Asttypes.closed_flag.Closed ,
- < l1:T1; ...; ln:Tn; .. > when flag is Asttypes.closed_flag.Open .
*)
| Ptyp_class of Longident.t 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] .
*)
| Ptyp_alias of core_type * string
(* T as 'a .
*)
| Ptyp_variant of row_field list * Asttypes.closed_flag * Asttypes.label list option
(* Ptyp_variant([`A;`B], flag, labels) represents:
- [ `A|`B ] when flag is Asttypes.closed_flag.Closed , and labels is None ,
- [> `A|`B ] when flag is Asttypes.closed_flag.Open , and labels is None ,
- [< `A|`B ] when flag is Asttypes.closed_flag.Closed , and labels is Some [] ,
- [< `A|`B > `X `Y ] when flag is Asttypes.closed_flag.Closed , and labels is Some
["X";"Y"] .
*)
| Ptyp_poly of string Asttypes.loc list * core_type
(* 'a1 ... 'an. T
Can only appear in the following context:
-As the Parsetree.core_type of a Parsetree.pattern_desc.Ppat_constraint node corresponding
to a constraint on a let-binding:
let x : 'a1 ... 'an. T = e ...
-Under Parsetree.class_field_kind.Cfk_virtual for methods (not values).
-As the Parsetree.core_type of a Parsetree.class_type_field_desc.Pctf_method node.
-As the Parsetree.core_type of a Parsetree.expression_desc.Pexp_poly node.
-As the Parsetree.label_declaration.pld_type field of a Parsetree.label_declaration .
-As a Parsetree.core_type of a Parsetree.core_type_desc.Ptyp_object node.
-As the Parsetree.value_description.pval_type field of a Parsetree.value_description .
*)
| Ptyp_package of package_type
(* (module S) .
*)
| Ptyp_extension of extension
(* [%id] .
*)
type package_type = Longident.t Asttypes.loc * (Longident.t Asttypes.loc * core_type) list
As Parsetree.package_type typed values:
- (S, []) represents (module S) ,
- (S, [(t1, T1) ; ... ; (tn, Tn)]) represents (module S with type t1 = T1 and ... and tn =
Tn) .
type row_field = {
prf_desc : row_field_desc ;
prf_loc : Location.t ;
prf_attributes : attributes ;
}
type row_field_desc =
| Rtag of Asttypes.label Asttypes.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 ]
*)
type object_field = {
pof_desc : object_field_desc ;
pof_loc : Location.t ;
pof_attributes : attributes ;
}
type object_field_desc =
| Otag of Asttypes.label Asttypes.loc * core_type
| Oinherit of core_type
Patterns
type pattern = {
ppat_desc : pattern_desc ;
ppat_loc : Location.t ;
ppat_loc_stack : location_stack ;
ppat_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type pattern_desc =
| Ppat_any (* The pattern _ .
*)
| Ppat_var of string Asttypes.loc
(* A variable pattern such as x
*)
| Ppat_alias of pattern * string Asttypes.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 Asttypes.loc * (string 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)
*)
| Ppat_variant of Asttypes.label * pattern option
(* Ppat_variant(`A, pat) represents:
- `A when pat is None ,
- `A P when pat is Some P
*)
| Ppat_record of (Longident.t Asttypes.loc * pattern) list * Asttypes.closed_flag
(* Ppat_record([(l1, P1) ; ... ; (ln, Pn)], flag) represents:
- { l1=P1; ...; ln=Pn } when flag is Asttypes.closed_flag.Closed
- { l1=P1; ...; ln=Pn; _} when flag is Asttypes.closed_flag.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 Asttypes.loc
(* Pattern #tconst
*)
| Ppat_lazy of pattern
(* Pattern lazy P
*)
| Ppat_unpack of string option Asttypes.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 Asttypes.loc * pattern
(* Pattern M.(P)
*)
Value expressions
type expression = {
pexp_desc : expression_desc ;
pexp_loc : Location.t ;
pexp_loc_stack : location_stack ;
pexp_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type expression_desc =
| Pexp_ident of Longident.t Asttypes.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 Asttypes.rec_flag.Nonrecursive ,
- let rec P1 = E1 and ... and Pn = EN in E when flag is Asttypes.rec_flag.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 Asttypes.arg_label.Nolabel and exp0 is None
- fun ~l:P -> E1 when lbl is Asttypes.arg_label.Labelled and exp0 is None
- fun ?l:P -> E1 when lbl is Asttypes.arg_label.Optional and exp0 is None
- fun ?l:(P = E0) -> E1 when lbl is Asttypes.arg_label.Optional and exp0 is Some E0
Notes:
-If E0 is provided, only Asttypes.arg_label.Optional is allowed.
- fun P1 P2 .. Pn -> E1 is represented as nested Parsetree.expression_desc.Pexp_fun .
- let f P = E is represented using Parsetree.expression_desc.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 Asttypes.arg_label.Nolabel (non labeled argument), Asttypes.arg_label.Labelled
(labelled arguments) or Asttypes.arg_label.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 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])
*)
| Pexp_variant of Asttypes.label * expression option
(* Pexp_variant(`A, exp) represents
- `A when exp is None
- `A E when exp is Some E
*)
| Pexp_record of (Longident.t Asttypes.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 Asttypes.loc
(* E.l
*)
| Pexp_setfield of expression * Longident.t Asttypes.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 Asttypes.direction_flag.Upto
- for i = E1 downto E2 do E3 done when direction is Asttypes.direction_flag.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 * Asttypes.label Asttypes.loc
(* E # m
*)
| Pexp_new of Longident.t Asttypes.loc
(* new M.c
*)
| Pexp_setinstvar of Asttypes.label Asttypes.loc * expression
(* x <- 2
*)
| Pexp_override of (Asttypes.label Asttypes.loc * expression) list
(* {< x1 = E1; ...; xn = En >}
*)
| Pexp_letmodule of string option Asttypes.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 Parsetree.class_field_kind.Cfk_concrete for
methods (not values).
*)
| Pexp_object of class_structure
(* object ... end
*)
| Pexp_newtype of string Asttypes.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 (* .
*)
type case = {
pc_lhs : pattern ;
pc_guard : expression option ;
pc_rhs : expression ;
}
Values of type Parsetree.case represents (P -> E) or (P when E0 -> E)
type letop = {
let_ : binding_op ;
ands : binding_op list ;
body : expression ;
}
type binding_op = {
pbop_op : string Asttypes.loc ;
pbop_pat : pattern ;
pbop_exp : expression ;
pbop_loc : Location.t ;
}
Value descriptions
type value_description = {
pval_name : string Asttypes.loc ;
pval_type : core_type ;
pval_prim : string list ;
pval_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
pval_loc : Location.t ;
}
Values of type Parsetree.value_description represents:
- val x: T , when Parsetree.value_description.pval_prim is []
- external x: T = "s1" ... "sn" when Parsetree.value_description.pval_prim is
["s1";..."sn"]
Type declarations
type type_declaration = {
ptype_name : string Asttypes.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
Parsetree.type_declaration.ptype_kind and Parsetree.type_declaration.ptype_manifest
values:
- type t when type_kind is Parsetree.type_kind.Ptype_abstract , and manifest is None ,
- type t = T0 when type_kind is Parsetree.type_kind.Ptype_abstract , and manifest is Some
T0 ,
- type t = C of T | ... when type_kind is Parsetree.type_kind.Ptype_variant , and
manifest is None ,
- type t = T0 = C of T | ... when type_kind is Parsetree.type_kind.Ptype_variant , and
manifest is Some T0 ,
- type t = {l: T; ...} when type_kind is Parsetree.type_kind.Ptype_record , and manifest
is None ,
- type t = T0 = {l : T; ...} when type_kind is Parsetree.type_kind.Ptype_record , and
manifest is Some T0 ,
- type t = .. when type_kind is Parsetree.type_kind.Ptype_open , and manifest is None .
type type_kind =
| Ptype_abstract
| Ptype_variant of constructor_declaration list
| Ptype_record of label_declaration list
(* Invariant: non-empty list
*)
| Ptype_open
type label_declaration = {
pld_name : string Asttypes.loc ;
pld_mutable : Asttypes.mutable_flag ;
pld_type : core_type ;
pld_loc : Location.t ;
pld_attributes : attributes ; (* l : T [@id1] [@id2]
*)
}
- { ...; l: T; ... } when Parsetree.label_declaration.pld_mutable is
Asttypes.mutable_flag.Immutable ,
- { ...; mutable l: T; ... } when Parsetree.label_declaration.pld_mutable is
Asttypes.mutable_flag.Mutable .
Note: T can be a Parsetree.core_type_desc.Ptyp_poly .
type constructor_declaration = {
pcd_name : string Asttypes.loc ;
pcd_vars : string Asttypes.loc list ;
pcd_args : constructor_arguments ;
pcd_res : core_type option ;
pcd_loc : Location.t ;
pcd_attributes : attributes ; (* C of ... [@id1] [@id2]
*)
}
type constructor_arguments =
| Pcstr_tuple of core_type list
| Pcstr_record of label_declaration list
(* Values of type Parsetree.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 [...] .
*)
type type_extension = {
ptyext_path : Longident.t Asttypes.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 += ... ).
type extension_constructor = {
pext_name : string Asttypes.loc ;
pext_kind : extension_constructor_kind ;
pext_loc : Location.t ;
pext_attributes : attributes ; (* C of ... [@id1] [@id2]
*)
}
type type_exception = {
ptyexn_constructor : extension_constructor ;
ptyexn_loc : Location.t ;
ptyexn_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
}
Definition of a new exception ( exception E ).
type extension_constructor_kind =
| Pext_decl of string 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 .
*)
| Pext_rebind of Longident.t Asttypes.loc
(* Pext_rebind(D) re-export the constructor D with the new name C
*)
Class language
Type expressions for the class language
type class_type = {
pcty_desc : class_type_desc ;
pcty_loc : Location.t ;
pcty_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type class_type_desc =
| Pcty_constr of Longident.t Asttypes.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:
- T -> CT when lbl is Asttypes.arg_label.Nolabel ,
- ~l:T -> CT when lbl is Asttypes.arg_label.Labelled ,
- ?l:T -> CT when lbl is Asttypes.arg_label.Optional .
*)
| Pcty_extension of extension
(* %id
*)
| Pcty_open of open_description * class_type
(* let open M in CT
*)
type class_signature = {
pcsig_self : core_type ;
pcsig_fields : class_type_field list ;
}
Values of type class_signature represents:
- object('selfpat) ... end
- object ... end when Parsetree.class_signature.pcsig_self is
Parsetree.core_type_desc.Ptyp_any
type class_type_field = {
pctf_desc : class_type_field_desc ;
pctf_loc : Location.t ;
pctf_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
}
type class_type_field_desc =
| Pctf_inherit of class_type
(* inherit CT
*)
| Pctf_val of (Asttypes.label Asttypes.loc * Asttypes.mutable_flag *
Asttypes.virtual_flag * core_type)
(* val x: T
*)
| Pctf_method of (Asttypes.label Asttypes.loc * Asttypes.private_flag *
Asttypes.virtual_flag * core_type)
(* method x: T
Note: T can be a Parsetree.core_type_desc.Ptyp_poly .
*)
| Pctf_constraint of (core_type * core_type)
(* constraint T1 = T2
*)
| Pctf_attribute of attribute
(* [@@@id]
*)
| Pctf_extension of extension
(* [%%id]
*)
type 'a class_infos = {
pci_virt : Asttypes.virtual_flag ;
pci_params : (core_type * (Asttypes.variance * Asttypes.injectivity)) list ;
pci_name : string Asttypes.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.
type class_description = class_type class_infos
type class_type_declaration = class_type class_infos
Value expressions for the class language
type class_expr = {
pcl_desc : class_expr_desc ;
pcl_loc : Location.t ;
pcl_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type class_expr_desc =
| Pcl_constr of Longident.t Asttypes.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 Asttypes.arg_label.Nolabel and exp0 is None ,
- fun ~l:P -> CE when lbl is Asttypes.arg_label.Labelled and exp0 is None ,
- fun ?l:P -> CE when lbl is Asttypes.arg_label.Optional and exp0 is None ,
- fun ?l:(P = E0) -> CE when lbl is Asttypes.arg_label.Optional 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 Asttypes.rec_flag.Nonrecursive ,
- let rec P1 = E1 and ... and Pn = EN in CE when rec is Asttypes.rec_flag.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
*)
type class_structure = {
pcstr_self : pattern ;
pcstr_fields : class_field list ;
}
Values of type Parsetree.class_structure represents:
- object(selfpat) ... end
- object ... end when Parsetree.class_structure.pcstr_self is
Parsetree.pattern_desc.Ppat_any
type class_field = {
pcf_desc : class_field_desc ;
pcf_loc : Location.t ;
pcf_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
}
type class_field_desc =
| Pcf_inherit of Asttypes.override_flag * class_expr * string Asttypes.loc option
(* Pcf_inherit(flag, CE, s) represents:
- inherit CE when flag is Asttypes.override_flag.Fresh and s is None ,
- inherit CE as x when flag is Asttypes.override_flag.Fresh and s is Some x ,
- inherit! CE when flag is Asttypes.override_flag.Override and s is None ,
- inherit! CE as x when flag is Asttypes.override_flag.Override and s is Some x
*)
| Pcf_val of (Asttypes.label Asttypes.loc * Asttypes.mutable_flag * class_field_kind)
(* Pcf_val(x,flag, kind) represents:
- val x = E when flag is Asttypes.mutable_flag.Immutable and kind is
Parsetree.class_field_kind.Cfk_concrete
- val virtual x: T when flag is Asttypes.mutable_flag.Immutable and kind is
Parsetree.class_field_kind.Cfk_virtual
- val mutable x = E when flag is Asttypes.mutable_flag.Mutable and kind is
Parsetree.class_field_kind.Cfk_concrete
- val mutable virtual x: T when flag is Asttypes.mutable_flag.Mutable and kind is
Parsetree.class_field_kind.Cfk_virtual
*)
| Pcf_method of (Asttypes.label Asttypes.loc * Asttypes.private_flag * class_field_kind)
(* - method x = E ( E can be a Parsetree.expression_desc.Pexp_poly )
- method virtual x: T ( T can be a Parsetree.core_type_desc.Ptyp_poly )
*)
| 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]
*)
type class_field_kind =
| Cfk_virtual of core_type
| Cfk_concrete of Asttypes.override_flag * expression
type class_declaration = class_expr class_infos
Module language
Type expressions for the module language
type module_type = {
pmty_desc : module_type_desc ;
pmty_loc : Location.t ;
pmty_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type module_type_desc =
| Pmty_ident of Longident.t Asttypes.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 Asttypes.loc
(* (module M)
*)
type functor_parameter =
| Unit (* ()
*)
| Named of string option Asttypes.loc * module_type
(* Named(name, MT) represents:
- (X : MT) when name is Some X ,
- (_ : MT) when name is None
*)
type signature = signature_item list
type signature_item = {
psig_desc : signature_item_desc ;
psig_loc : Location.t ;
}
type 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]
*)
type module_declaration = {
pmd_name : string option Asttypes.loc ;
pmd_type : module_type ;
pmd_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
pmd_loc : Location.t ;
}
Values of type module_declaration represents S : MT
type module_substitution = {
pms_name : string Asttypes.loc ;
pms_manifest : Longident.t Asttypes.loc ;
pms_attributes : attributes ; (* ... [@@id1] [@@id2]
*)
pms_loc : Location.t ;
}
Values of type module_substitution represents S := M
type module_type_declaration = {
pmtd_name : string Asttypes.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 Parsetree.module_type_declaration.pmtd_type
is None .
type 'a open_infos = {
popen_expr : 'a ;
popen_override : Asttypes.override_flag ;
popen_loc : Location.t ;
popen_attributes : attributes ;
}
Values of type 'a open_infos represents:
- open! X when Parsetree.open_infos.popen_override is Asttypes.override_flag.Override
(silences the "used identifier shadowing" warning)
- open X when Parsetree.open_infos.popen_override is Asttypes.override_flag.Fresh
type open_description = Longident.t Asttypes.loc open_infos
Values of type open_description represents:
- open M.N
- open M(N).O
type open_declaration = module_expr open_infos
Values of type open_declaration represents:
- open M.N
- open M(N).O
- open struct ... end
type 'a include_infos = {
pincl_mod : 'a ;
pincl_loc : Location.t ;
pincl_attributes : attributes ;
}
type include_description = module_type include_infos
Values of type include_description represents include MT
type include_declaration = module_expr include_infos
Values of type include_declaration represents include ME
type with_constraint =
| Pwith_type of Longident.t Asttypes.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 Asttypes.loc * Longident.t Asttypes.loc
(* with module X.Y = Z
*)
| Pwith_modtype of Longident.t Asttypes.loc * module_type
(* with module type X.Y = Z
*)
| Pwith_modtypesubst of Longident.t Asttypes.loc * module_type
(* with module type X.Y := sig end
*)
| Pwith_typesubst of Longident.t Asttypes.loc * type_declaration
(* with type X.t := ..., same format as [Pwith_type]
*)
| Pwith_modsubst of Longident.t Asttypes.loc * Longident.t Asttypes.loc
(* with module X.Y := Z
*)
Value expressions for the module language
type module_expr = {
pmod_desc : module_expr_desc ;
pmod_loc : Location.t ;
pmod_attributes : attributes ; (* ... [@id1] [@id2]
*)
}
type module_expr_desc =
| Pmod_ident of Longident.t Asttypes.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]
*)
type structure = structure_item list
type structure_item = {
pstr_desc : structure_item_desc ;
pstr_loc : Location.t ;
}
type 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 Asttypes.rec_flag.Nonrecursive ,
- let rec P1 = E1 and ... and Pn = EN when rec is Asttypes.rec_flag.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]
*)
type value_binding = {
pvb_pat : pattern ;
pvb_expr : expression ;
pvb_attributes : attributes ;
pvb_loc : Location.t ;
}
type module_binding = {
pmb_name : string option Asttypes.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 =
| Ptop_def of structure
| Ptop_dir of toplevel_directive
(* #use , #load ...
*)
type toplevel_directive = {
pdir_name : string Asttypes.loc ;
pdir_arg : directive_argument option ;
pdir_loc : Location.t ;
}
type directive_argument = {
pdira_desc : directive_argument_desc ;
pdira_loc : Location.t ;
}
type directive_argument_desc =
| Pdir_string of string
| Pdir_int of string * char option
| Pdir_ident of Longident.t
| Pdir_bool of bool