package ocaml-base-compiler

  1. Overview
  2. Docs
Package contains no libraries

Abstract syntax tree after typing

By comparison with Parsetree:

  • Every Longindent.t is accompanied by a resolved Path.t.
type partial =
  1. | Partial
  2. | Total

Extension points

type attribute = Parsetree.attribute
type attributes = attribute list

Core language

type pattern = {
  1. pat_desc : pattern_desc;
  2. pat_loc : Location.t;
  3. pat_extra : (pat_extra * Location.t * attributes) list;
  4. pat_type : Types.type_expr;
  5. mutable pat_env : Env.t;
  6. pat_attributes : attributes;
}
and pat_extra =
  1. | Tpat_constraint of core_type
    (*

    P : T pat_desc = P ; pat_extra = (Tpat_constraint T, _, _) :: ...

    *)
  2. | Tpat_type of Path.t * Longident.t Asttypes.loc
    (*

    #tconst pat_desc = disjunction ; pat_extra = (Tpat_type (P, "tconst"), _, _) :: ...

    where disjunction is a Tpat_or _ representing the branches of tconst.

    *)
  3. | Tpat_open of Path.t * Longident.t Asttypes.loc * Env.t
  4. | Tpat_unpack
    (*

    (module P) pat_desc = Tpat_var "P" ; pat_extra = (Tpat_unpack, _, _) :: ...

    *)
and pattern_desc =
  1. | Tpat_any
    (*

    _

    *)
  2. | Tpat_var of Ident.t * string Asttypes.loc
    (*

    x

    *)
  3. | Tpat_alias of pattern * Ident.t * string Asttypes.loc
    (*

    P as a

    *)
  4. | Tpat_constant of Asttypes.constant
    (*

    1, 'a', "true", 1.0, 1l, 1L, 1n

    *)
  5. | Tpat_tuple of pattern list
    (*

    (P1, ..., Pn)

    Invariant: n >= 2

    *)
  6. | Tpat_construct of Longident.t Asttypes.loc * Types.constructor_description * pattern list
    (*

    C C P P C (P1, ..., Pn) P1; ...; Pn

    *)
  7. | Tpat_variant of Asttypes.label * pattern option * Types.row_desc Pervasives.ref
    (*

    `A (None) `A P (Some P)

    See Types.row_desc for an explanation of the last parameter.

    *)
  8. | Tpat_record of (Longident.t Asttypes.loc * Types.label_description * pattern) list * Asttypes.closed_flag
    (*

    l1=P1; ...; ln=Pn (flag = Closed) l1=P1; ...; ln=Pn; _ (flag = Open)

    Invariant: n > 0

    *)
  9. | Tpat_array of pattern list
    (*

    | P1; ...; Pn |

    *)
  10. | Tpat_or of pattern * pattern * Types.row_desc option
    (*

    P1 | P2

    row_desc = Some _ when translating Ppat_type _, None otherwise.

    *)
  11. | Tpat_lazy of pattern
    (*

    lazy P

    *)
and expression = {
  1. exp_desc : expression_desc;
  2. exp_loc : Location.t;
  3. exp_extra : (exp_extra * Location.t * attributes) list;
  4. exp_type : Types.type_expr;
  5. exp_env : Env.t;
  6. exp_attributes : attributes;
}
and exp_extra =
  1. | Texp_constraint of core_type
    (*

    E : T

    *)
  2. | Texp_coerce of core_type option * core_type
    (*

    E :> T Texp_coerce (None, T) E : T0 :> T Texp_coerce (Some T0, T)

    *)
  3. | Texp_open of Asttypes.override_flag * Path.t * Longident.t Asttypes.loc * Env.t
    (*

    let open! M in Texp_open (!, P, M, env) where env is the environment after opening P

    *)
  4. | Texp_poly of core_type option
    (*

    Used for method bodies.

    *)
  5. | Texp_newtype of string
    (*

    fun (type t) ->

    *)
and expression_desc =
  1. | Texp_ident of Path.t * Longident.t Asttypes.loc * Types.value_description
    (*

    x M.x

    *)
  2. | Texp_constant of Asttypes.constant
    (*

    1, 'a', "true", 1.0, 1l, 1L, 1n

    *)
  3. | Texp_let of Asttypes.rec_flag * value_binding list * expression
    (*

    let P1 = E1 and ... and Pn = EN in E (flag = Nonrecursive) let rec P1 = E1 and ... and Pn = EN in E (flag = Recursive)

    *)
  4. | Texp_function of Asttypes.arg_label * case list * partial
    (*

    Pexp_fun and Pexp_function both translate to Texp_function. See Parsetree for more details.

    partial = Partial if the pattern match is partial Total otherwise.

    *)
  5. | Texp_apply of expression * (Asttypes.arg_label * expression option) list
    (*

    E0 ~l1:E1 ... ~ln:En

    The expression can be None if the expression is abstracted over this argument. It currently appears when a label is applied.

    For example: let f x ~y = x + y in f ~y:3

    The resulting typedtree for the application is: Texp_apply (Texp_ident "f/1037", (Nolabel, None); (Labelled "y", Some (Texp_constant Const_int 3)) )

    *)
  6. | Texp_match of expression * case list * case list * partial
    (*

    match E0 with | P1 -> E1 | P2 -> E2 | exception P3 -> E3

    Texp_match (E0, [(P1, E1); (P2, E2)], [(P3, E3)], _)

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

    try E with P1 -> E1 | ... | PN -> EN

    *)
  8. | Texp_tuple of expression list
    (*

    (E1, ..., EN)

    *)
  9. | Texp_construct of Longident.t Asttypes.loc * Types.constructor_description * expression list
    (*

    C C E E C (E1, ..., En) E1;...;En

    *)
  10. | Texp_variant of Asttypes.label * expression option
  11. | Texp_record of {
    1. fields : (Types.label_description * record_label_definition) array;
    2. representation : Types.record_representation;
    3. extended_expression : expression option;
    }
    (*

    l1=P1; ...; ln=Pn (extended_expression = None) E0 with l1=P1; ...; ln=Pn (extended_expression = Some E0)

    Invariant: n > 0

    If the type is l1: t1; l2: t2 , the expression E0 with t2=P2 is represented as Texp_record fields = [| l1, Kept t1; l2 Override P2 |]; representation; extended_expression = Some E0

    *)
  12. | Texp_field of expression * Longident.t Asttypes.loc * Types.label_description
  13. | Texp_setfield of expression * Longident.t Asttypes.loc * Types.label_description * expression
  14. | Texp_array of expression list
  15. | Texp_ifthenelse of expression * expression * expression option
  16. | Texp_sequence of expression * expression
  17. | Texp_while of expression * expression
  18. | Texp_for of Ident.t * Parsetree.pattern * expression * expression * Asttypes.direction_flag * expression
  19. | Texp_send of expression * meth * expression option
  20. | Texp_new of Path.t * Longident.t Asttypes.loc * Types.class_declaration
  21. | Texp_instvar of Path.t * Path.t * string Asttypes.loc
  22. | Texp_setinstvar of Path.t * Path.t * string Asttypes.loc * expression
  23. | Texp_override of Path.t * (Path.t * string Asttypes.loc * expression) list
  24. | Texp_letmodule of Ident.t * string Asttypes.loc * module_expr * expression
  25. | Texp_letexception of extension_constructor * expression
  26. | Texp_assert of expression
  27. | Texp_lazy of expression
  28. | Texp_object of class_structure * string list
  29. | Texp_pack of module_expr
  30. | Texp_unreachable
  31. | Texp_extension_constructor of Longident.t Asttypes.loc * Path.t
and meth =
  1. | Tmeth_name of string
  2. | Tmeth_val of Ident.t
and case = {
  1. c_lhs : pattern;
  2. c_guard : expression option;
  3. c_rhs : expression;
}
and record_label_definition =
  1. | Kept of Types.type_expr
  2. | Overridden of Longident.t Asttypes.loc * expression
and class_expr = {
  1. cl_desc : class_expr_desc;
  2. cl_loc : Location.t;
  3. cl_type : Types.class_type;
  4. cl_env : Env.t;
  5. cl_attributes : attributes;
}
and class_expr_desc =
  1. | Tcl_ident of Path.t * Longident.t Asttypes.loc * core_type list
  2. | Tcl_structure of class_structure
  3. | Tcl_fun of Asttypes.arg_label * pattern * (Ident.t * string Asttypes.loc * expression) list * class_expr * partial
  4. | Tcl_apply of class_expr * (Asttypes.arg_label * expression option) list
  5. | Tcl_let of Asttypes.rec_flag * value_binding list * (Ident.t * string Asttypes.loc * expression) list * class_expr
  6. | Tcl_constraint of class_expr * class_type option * string list * string list * Types.Concr.t
and class_structure = {
  1. cstr_self : pattern;
  2. cstr_fields : class_field list;
  3. cstr_type : Types.class_signature;
  4. cstr_meths : Ident.t Types.Meths.t;
}
and class_field = {
  1. cf_desc : class_field_desc;
  2. cf_loc : Location.t;
  3. cf_attributes : attributes;
}
and class_field_kind =
  1. | Tcfk_virtual of core_type
  2. | Tcfk_concrete of Asttypes.override_flag * expression
and class_field_desc =
  1. | Tcf_inherit of Asttypes.override_flag * class_expr * string option * (string * Ident.t) list * (string * Ident.t) list
  2. | Tcf_val of string Asttypes.loc * Asttypes.mutable_flag * Ident.t * class_field_kind * bool
  3. | Tcf_method of string Asttypes.loc * Asttypes.private_flag * class_field_kind
  4. | Tcf_constraint of core_type * core_type
  5. | Tcf_initializer of expression
  6. | Tcf_attribute of attribute
and module_expr = {
  1. mod_desc : module_expr_desc;
  2. mod_loc : Location.t;
  3. mod_type : Types.module_type;
  4. mod_env : Env.t;
  5. mod_attributes : attributes;
}
and module_type_constraint =
  1. | Tmodtype_implicit
    (*

    The module type constraint has been synthesized during typecheking.

    *)
  2. | Tmodtype_explicit of module_type
    (*

    The module type was in the source file.

    *)

Annotations for Tmod_constraint.

and module_expr_desc =
  1. | Tmod_ident of Path.t * Longident.t Asttypes.loc
  2. | Tmod_structure of structure
  3. | Tmod_functor of Ident.t * string Asttypes.loc * module_type option * module_expr
  4. | Tmod_apply of module_expr * module_expr * module_coercion
  5. | Tmod_constraint of module_expr * Types.module_type * module_type_constraint * module_coercion
    (*

    ME (constraint = Tmodtype_implicit) (ME : MT) (constraint = Tmodtype_explicit MT)

    *)
  6. | Tmod_unpack of expression * Types.module_type
and structure = {
  1. str_items : structure_item list;
  2. str_type : Types.signature;
  3. str_final_env : Env.t;
}
and structure_item = {
  1. str_desc : structure_item_desc;
  2. str_loc : Location.t;
  3. str_env : Env.t;
}
and structure_item_desc =
  1. | Tstr_eval of expression * attributes
  2. | Tstr_value of Asttypes.rec_flag * value_binding list
  3. | Tstr_primitive of value_description
  4. | Tstr_type of Asttypes.rec_flag * type_declaration list
  5. | Tstr_typext of type_extension
  6. | Tstr_exception of extension_constructor
  7. | Tstr_module of module_binding
  8. | Tstr_recmodule of module_binding list
  9. | Tstr_modtype of module_type_declaration
  10. | Tstr_open of open_description
  11. | Tstr_class of (class_declaration * string list) list
  12. | Tstr_class_type of (Ident.t * string Asttypes.loc * class_type_declaration) list
  13. | Tstr_include of include_declaration
  14. | Tstr_attribute of attribute
and module_binding = {
  1. mb_id : Ident.t;
  2. mb_name : string Asttypes.loc;
  3. mb_expr : module_expr;
  4. mb_attributes : attributes;
  5. mb_loc : Location.t;
}
and value_binding = {
  1. vb_pat : pattern;
  2. vb_expr : expression;
  3. vb_attributes : attributes;
  4. vb_loc : Location.t;
}
and module_coercion =
  1. | Tcoerce_none
  2. | Tcoerce_structure of (int * module_coercion) list * (Ident.t * int * module_coercion) list
  3. | Tcoerce_functor of module_coercion * module_coercion
  4. | Tcoerce_primitive of primitive_coercion
  5. | Tcoerce_alias of Path.t * module_coercion
and module_type = {
  1. mty_desc : module_type_desc;
  2. mty_type : Types.module_type;
  3. mty_env : Env.t;
  4. mty_loc : Location.t;
  5. mty_attributes : attributes;
}
and module_type_desc =
  1. | Tmty_ident of Path.t * Longident.t Asttypes.loc
  2. | Tmty_signature of signature
  3. | Tmty_functor of Ident.t * string Asttypes.loc * module_type option * module_type
  4. | Tmty_with of module_type * (Path.t * Longident.t Asttypes.loc * with_constraint) list
  5. | Tmty_typeof of module_expr
  6. | Tmty_alias of Path.t * Longident.t Asttypes.loc
and primitive_coercion = {
  1. pc_desc : Primitive.description;
  2. pc_type : Types.type_expr;
  3. pc_env : Env.t;
  4. pc_loc : Location.t;
}
and signature = {
  1. sig_items : signature_item list;
  2. sig_type : Types.signature;
  3. sig_final_env : Env.t;
}
and signature_item = {
  1. sig_desc : signature_item_desc;
  2. sig_env : Env.t;
  3. sig_loc : Location.t;
}
and signature_item_desc =
  1. | Tsig_value of value_description
  2. | Tsig_type of Asttypes.rec_flag * type_declaration list
  3. | Tsig_typext of type_extension
  4. | Tsig_exception of extension_constructor
  5. | Tsig_module of module_declaration
  6. | Tsig_recmodule of module_declaration list
  7. | Tsig_modtype of module_type_declaration
  8. | Tsig_open of open_description
  9. | Tsig_include of include_description
  10. | Tsig_class of class_description list
  11. | Tsig_class_type of class_type_declaration list
  12. | Tsig_attribute of attribute
and module_declaration = {
  1. md_id : Ident.t;
  2. md_name : string Asttypes.loc;
  3. md_type : module_type;
  4. md_attributes : attributes;
  5. md_loc : Location.t;
}
and module_type_declaration = {
  1. mtd_id : Ident.t;
  2. mtd_name : string Asttypes.loc;
  3. mtd_type : module_type option;
  4. mtd_attributes : attributes;
  5. mtd_loc : Location.t;
}
and open_description = {
  1. open_path : Path.t;
  2. open_txt : Longident.t Asttypes.loc;
  3. open_override : Asttypes.override_flag;
  4. open_loc : Location.t;
  5. open_attributes : attribute list;
}
and 'a include_infos = {
  1. incl_mod : 'a;
  2. incl_type : Types.signature;
  3. incl_loc : Location.t;
  4. incl_attributes : attribute list;
}
and include_description = module_type include_infos
and include_declaration = module_expr include_infos
and with_constraint =
  1. | Twith_type of type_declaration
  2. | Twith_module of Path.t * Longident.t Asttypes.loc
  3. | Twith_typesubst of type_declaration
  4. | Twith_modsubst of Path.t * Longident.t Asttypes.loc
and core_type = {
  1. mutable ctyp_desc : core_type_desc;
    (*

    mutable because of Typeclass.declare_method

    *)
  2. mutable ctyp_type : Types.type_expr;
    (*

    mutable because of Typeclass.declare_method

    *)
  3. ctyp_env : Env.t;
  4. ctyp_loc : Location.t;
  5. ctyp_attributes : attributes;
}
and core_type_desc =
  1. | Ttyp_any
  2. | Ttyp_var of string
  3. | Ttyp_arrow of Asttypes.arg_label * core_type * core_type
  4. | Ttyp_tuple of core_type list
  5. | Ttyp_constr of Path.t * Longident.t Asttypes.loc * core_type list
  6. | Ttyp_object of (string * attributes * core_type) list * Asttypes.closed_flag
  7. | Ttyp_class of Path.t * Longident.t Asttypes.loc * core_type list
  8. | Ttyp_alias of core_type * string
  9. | Ttyp_variant of row_field list * Asttypes.closed_flag * Asttypes.label list option
  10. | Ttyp_poly of string list * core_type
  11. | Ttyp_package of package_type
and package_type = {
  1. pack_path : Path.t;
  2. pack_fields : (Longident.t Asttypes.loc * core_type) list;
  3. pack_type : Types.module_type;
  4. pack_txt : Longident.t Asttypes.loc;
}
and row_field =
  1. | Ttag of Asttypes.label * attributes * bool * core_type list
  2. | Tinherit of core_type
and value_description = {
  1. val_id : Ident.t;
  2. val_name : string Asttypes.loc;
  3. val_desc : core_type;
  4. val_val : Types.value_description;
  5. val_prim : string list;
  6. val_loc : Location.t;
  7. val_attributes : attributes;
}
and type_declaration = {
  1. typ_id : Ident.t;
  2. typ_name : string Asttypes.loc;
  3. typ_params : (core_type * Asttypes.variance) list;
  4. typ_type : Types.type_declaration;
  5. typ_cstrs : (core_type * core_type * Location.t) list;
  6. typ_kind : type_kind;
  7. typ_private : Asttypes.private_flag;
  8. typ_manifest : core_type option;
  9. typ_loc : Location.t;
  10. typ_attributes : attributes;
}
and type_kind =
  1. | Ttype_abstract
  2. | Ttype_variant of constructor_declaration list
  3. | Ttype_record of label_declaration list
  4. | Ttype_open
and label_declaration = {
  1. ld_id : Ident.t;
  2. ld_name : string Asttypes.loc;
  3. ld_mutable : Asttypes.mutable_flag;
  4. ld_type : core_type;
  5. ld_loc : Location.t;
  6. ld_attributes : attributes;
}
and constructor_declaration = {
  1. cd_id : Ident.t;
  2. cd_name : string Asttypes.loc;
  3. cd_args : constructor_arguments;
  4. cd_res : core_type option;
  5. cd_loc : Location.t;
  6. cd_attributes : attributes;
}
and constructor_arguments =
  1. | Cstr_tuple of core_type list
  2. | Cstr_record of label_declaration list
and type_extension = {
  1. tyext_path : Path.t;
  2. tyext_txt : Longident.t Asttypes.loc;
  3. tyext_params : (core_type * Asttypes.variance) list;
  4. tyext_constructors : extension_constructor list;
  5. tyext_private : Asttypes.private_flag;
  6. tyext_attributes : attributes;
}
and extension_constructor = {
  1. ext_id : Ident.t;
  2. ext_name : string Asttypes.loc;
  3. ext_type : Types.extension_constructor;
  4. ext_kind : extension_constructor_kind;
  5. ext_loc : Location.t;
  6. ext_attributes : attributes;
}
and extension_constructor_kind =
  1. | Text_decl of constructor_arguments * core_type option
  2. | Text_rebind of Path.t * Longident.t Asttypes.loc
and class_type = {
  1. cltyp_desc : class_type_desc;
  2. cltyp_type : Types.class_type;
  3. cltyp_env : Env.t;
  4. cltyp_loc : Location.t;
  5. cltyp_attributes : attributes;
}
and class_type_desc =
  1. | Tcty_constr of Path.t * Longident.t Asttypes.loc * core_type list
  2. | Tcty_signature of class_signature
  3. | Tcty_arrow of Asttypes.arg_label * core_type * class_type
and class_signature = {
  1. csig_self : core_type;
  2. csig_fields : class_type_field list;
  3. csig_type : Types.class_signature;
}
and class_type_field = {
  1. ctf_desc : class_type_field_desc;
  2. ctf_loc : Location.t;
  3. ctf_attributes : attributes;
}
and class_type_field_desc =
  1. | Tctf_inherit of class_type
  2. | Tctf_val of string * Asttypes.mutable_flag * Asttypes.virtual_flag * core_type
  3. | Tctf_method of string * Asttypes.private_flag * Asttypes.virtual_flag * core_type
  4. | Tctf_constraint of core_type * core_type
  5. | Tctf_attribute of attribute
and class_declaration = class_expr class_infos
and class_description = class_type class_infos
and class_type_declaration = class_type class_infos
and 'a class_infos = {
  1. ci_virt : Asttypes.virtual_flag;
  2. ci_params : (core_type * Asttypes.variance) list;
  3. ci_id_name : string Asttypes.loc;
  4. ci_id_class : Ident.t;
  5. ci_id_class_type : Ident.t;
  6. ci_id_object : Ident.t;
  7. ci_id_typehash : Ident.t;
  8. ci_expr : 'a;
  9. ci_decl : Types.class_declaration;
  10. ci_type_decl : Types.class_type_declaration;
  11. ci_loc : Location.t;
  12. ci_attributes : attributes;
}
val iter_pattern_desc : (pattern -> unit) -> pattern_desc -> unit
val map_pattern_desc : (pattern -> pattern) -> pattern_desc -> pattern_desc
val let_bound_idents : value_binding list -> Ident.t list
val rev_let_bound_idents : value_binding list -> Ident.t list
val let_bound_idents_with_loc : value_binding list -> (Ident.t * string Asttypes.loc) list
val alpha_pat : (Ident.t * Ident.t) list -> pattern -> pattern

Alpha conversion of patterns

val mknoloc : 'a -> 'a Asttypes.loc
val mkloc : 'a -> Location.t -> 'a Asttypes.loc
val pat_bound_idents : pattern -> Ident.t list
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