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parser.mly
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parser.mly
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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
/* The parser definition */
%{
open Location
open Asttypes
open Longident
open Parsetree
open Ast_helper
open Docstrings
let mktyp d = Typ.mk ~loc:(symbol_rloc()) d
let mkpat d = Pat.mk ~loc:(symbol_rloc()) d
let mkexp d = Exp.mk ~loc:(symbol_rloc()) d
let mkmty ?attrs d = Mty.mk ~loc:(symbol_rloc()) ?attrs d
let mksig d = Sig.mk ~loc:(symbol_rloc()) d
let mkmod ?attrs d = Mod.mk ~loc:(symbol_rloc()) ?attrs d
let mkstr d = Str.mk ~loc:(symbol_rloc()) d
let mkclass ?attrs d = Cl.mk ~loc:(symbol_rloc()) ?attrs d
let mkcty ?attrs d = Cty.mk ~loc:(symbol_rloc()) ?attrs d
let mkctf ?attrs ?docs d =
Ctf.mk ~loc:(symbol_rloc()) ?attrs ?docs d
let mkcf ?attrs ?docs d =
Cf.mk ~loc:(symbol_rloc()) ?attrs ?docs d
let mkrhs rhs pos = mkloc rhs (rhs_loc pos)
let reloc_pat x = { x with ppat_loc = symbol_rloc () };;
let reloc_exp x = { x with pexp_loc = symbol_rloc () };;
let mkoperator name pos =
let loc = rhs_loc pos in
Exp.mk ~loc (Pexp_ident(mkloc (Lident name) loc))
let mkpatvar name pos =
Pat.mk ~loc:(rhs_loc pos) (Ppat_var (mkrhs name pos))
(*
Ghost expressions and patterns:
expressions and patterns that do not appear explicitly in the
source file they have the loc_ghost flag set to true.
Then the profiler will not try to instrument them and the
-annot option will not try to display their type.
Every grammar rule that generates an element with a location must
make at most one non-ghost element, the topmost one.
How to tell whether your location must be ghost:
A location corresponds to a range of characters in the source file.
If the location contains a piece of code that is syntactically
valid (according to the documentation), and corresponds to the
AST node, then the location must be real; in all other cases,
it must be ghost.
*)
let ghexp d = Exp.mk ~loc:(symbol_gloc ()) d
let ghpat d = Pat.mk ~loc:(symbol_gloc ()) d
let ghtyp d = Typ.mk ~loc:(symbol_gloc ()) d
let ghloc d = { txt = d; loc = symbol_gloc () }
let ghstr d = Str.mk ~loc:(symbol_gloc()) d
let ghsig d = Sig.mk ~loc:(symbol_gloc()) d
let mkinfix arg1 name arg2 =
mkexp(Pexp_apply(mkoperator name 2, [Nolabel, arg1; Nolabel, arg2]))
let neg_string f =
if String.length f > 0 && f.[0] = '-'
then String.sub f 1 (String.length f - 1)
else "-" ^ f
let mkuminus name arg =
match name, arg.pexp_desc with
| "-", Pexp_constant(Pconst_integer (n,m)) ->
mkexp(Pexp_constant(Pconst_integer(neg_string n,m)))
| ("-" | "-."), Pexp_constant(Pconst_float (f, m)) ->
mkexp(Pexp_constant(Pconst_float(neg_string f, m)))
| _ ->
mkexp(Pexp_apply(mkoperator ("~" ^ name) 1, [Nolabel, arg]))
let mkuplus name arg =
let desc = arg.pexp_desc in
match name, desc with
| "+", Pexp_constant(Pconst_integer _)
| ("+" | "+."), Pexp_constant(Pconst_float _) -> mkexp desc
| _ ->
mkexp(Pexp_apply(mkoperator ("~" ^ name) 1, [Nolabel, arg]))
let mkexp_cons consloc args loc =
Exp.mk ~loc (Pexp_construct(mkloc (Lident "::") consloc, Some args))
let mkpat_cons consloc args loc =
Pat.mk ~loc (Ppat_construct(mkloc (Lident "::") consloc, Some args))
let rec mktailexp nilloc = function
[] ->
let loc = { nilloc with loc_ghost = true } in
let nil = { txt = Lident "[]"; loc = loc } in
Exp.mk ~loc (Pexp_construct (nil, None))
| e1 :: el ->
let exp_el = mktailexp nilloc el in
let loc = {loc_start = e1.pexp_loc.loc_start;
loc_end = exp_el.pexp_loc.loc_end;
loc_ghost = true}
in
let arg = Exp.mk ~loc (Pexp_tuple [e1; exp_el]) in
mkexp_cons {loc with loc_ghost = true} arg loc
let rec mktailpat nilloc = function
[] ->
let loc = { nilloc with loc_ghost = true } in
let nil = { txt = Lident "[]"; loc = loc } in
Pat.mk ~loc (Ppat_construct (nil, None))
| p1 :: pl ->
let pat_pl = mktailpat nilloc pl in
let loc = {loc_start = p1.ppat_loc.loc_start;
loc_end = pat_pl.ppat_loc.loc_end;
loc_ghost = true}
in
let arg = Pat.mk ~loc (Ppat_tuple [p1; pat_pl]) in
mkpat_cons {loc with loc_ghost = true} arg loc
let mkstrexp e attrs =
{ pstr_desc = Pstr_eval (e, attrs); pstr_loc = e.pexp_loc }
let mkexp_constraint e (t1, t2) =
match t1, t2 with
| Some t, None -> ghexp(Pexp_constraint(e, t))
| _, Some t -> ghexp(Pexp_coerce(e, t1, t))
| None, None -> assert false
let mkexp_opt_constraint e = function
| None -> e
| Some constraint_ -> mkexp_constraint e constraint_
let mkpat_opt_constraint p = function
| None -> p
| Some typ -> mkpat (Ppat_constraint(p, typ))
let array_function str name =
ghloc (Ldot(Lident str, (if !Clflags.fast then "unsafe_" ^ name else name)))
let syntax_error () =
raise Syntaxerr.Escape_error
let unclosed opening_name opening_num closing_name closing_num =
raise(Syntaxerr.Error(Syntaxerr.Unclosed(rhs_loc opening_num, opening_name,
rhs_loc closing_num, closing_name)))
let expecting pos nonterm =
raise Syntaxerr.(Error(Expecting(rhs_loc pos, nonterm)))
let not_expecting pos nonterm =
raise Syntaxerr.(Error(Not_expecting(rhs_loc pos, nonterm)))
let bigarray_function str name =
ghloc (Ldot(Ldot(Lident "Bigarray", str), name))
let bigarray_untuplify = function
{ pexp_desc = Pexp_tuple explist; pexp_loc = _ } -> explist
| exp -> [exp]
let bigarray_get arr arg =
let get = if !Clflags.fast then "unsafe_get" else "get" in
match bigarray_untuplify arg with
[c1] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array1" get)),
[Nolabel, arr; Nolabel, c1]))
| [c1;c2] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array2" get)),
[Nolabel, arr; Nolabel, c1; Nolabel, c2]))
| [c1;c2;c3] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array3" get)),
[Nolabel, arr; Nolabel, c1; Nolabel, c2; Nolabel, c3]))
| coords ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Genarray" "get")),
[Nolabel, arr; Nolabel, ghexp(Pexp_array coords)]))
let bigarray_set arr arg newval =
let set = if !Clflags.fast then "unsafe_set" else "set" in
match bigarray_untuplify arg with
[c1] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array1" set)),
[Nolabel, arr; Nolabel, c1; Nolabel, newval]))
| [c1;c2] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array2" set)),
[Nolabel, arr; Nolabel, c1;
Nolabel, c2; Nolabel, newval]))
| [c1;c2;c3] ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Array3" set)),
[Nolabel, arr; Nolabel, c1;
Nolabel, c2; Nolabel, c3; Nolabel, newval]))
| coords ->
mkexp(Pexp_apply(ghexp(Pexp_ident(bigarray_function "Genarray" "set")),
[Nolabel, arr;
Nolabel, ghexp(Pexp_array coords);
Nolabel, newval]))
let lapply p1 p2 =
if !Clflags.applicative_functors
then Lapply(p1, p2)
else raise (Syntaxerr.Error(Syntaxerr.Applicative_path (symbol_rloc())))
let exp_of_label lbl pos =
mkexp (Pexp_ident(mkrhs (Lident(Longident.last lbl)) pos))
let pat_of_label lbl pos =
mkpat (Ppat_var (mkrhs (Longident.last lbl) pos))
let mk_newtypes newtypes exp =
List.fold_right (fun newtype exp -> mkexp (Pexp_newtype (newtype, exp)))
newtypes exp
let wrap_type_annotation newtypes core_type body =
let exp = mkexp(Pexp_constraint(body,core_type)) in
let exp = mk_newtypes newtypes exp in
(exp, ghtyp(Ptyp_poly(newtypes, Typ.varify_constructors newtypes core_type)))
let wrap_exp_attrs body (ext, attrs) =
(* todo: keep exact location for the entire attribute *)
let body = {body with pexp_attributes = attrs @ body.pexp_attributes} in
match ext with
| None -> body
| Some id -> ghexp(Pexp_extension (id, PStr [mkstrexp body []]))
let mkexp_attrs d attrs =
wrap_exp_attrs (mkexp d) attrs
let wrap_typ_attrs typ (ext, attrs) =
(* todo: keep exact location for the entire attribute *)
let typ = {typ with ptyp_attributes = attrs @ typ.ptyp_attributes} in
match ext with
| None -> typ
| Some id -> ghtyp(Ptyp_extension (id, PTyp typ))
let mktyp_attrs d attrs =
wrap_typ_attrs (mktyp d) attrs
let wrap_pat_attrs pat (ext, attrs) =
(* todo: keep exact location for the entire attribute *)
let pat = {pat with ppat_attributes = attrs @ pat.ppat_attributes} in
match ext with
| None -> pat
| Some id -> ghpat(Ppat_extension (id, PPat (pat, None)))
let mkpat_attrs d attrs =
wrap_pat_attrs (mkpat d) attrs
let wrap_class_attrs body attrs =
{body with pcl_attributes = attrs @ body.pcl_attributes}
let wrap_class_type_attrs body attrs =
{body with pcty_attributes = attrs @ body.pcty_attributes}
let wrap_mod_attrs body attrs =
{body with pmod_attributes = attrs @ body.pmod_attributes}
let wrap_mty_attrs body attrs =
{body with pmty_attributes = attrs @ body.pmty_attributes}
let wrap_str_ext body ext =
match ext with
| None -> body
| Some id -> ghstr(Pstr_extension ((id, PStr [body]), []))
let mkstr_ext d ext =
wrap_str_ext (mkstr d) ext
let wrap_sig_ext body ext =
match ext with
| None -> body
| Some id -> ghsig(Psig_extension ((id, PSig [body]), []))
let mksig_ext d ext =
wrap_sig_ext (mksig d) ext
let text_str pos = Str.text (rhs_text pos)
let text_sig pos = Sig.text (rhs_text pos)
let text_cstr pos = Cf.text (rhs_text pos)
let text_csig pos = Ctf.text (rhs_text pos)
let text_def pos = [Ptop_def (Str.text (rhs_text pos))]
let extra_text text pos items =
let pre_extras = rhs_pre_extra_text pos in
let post_extras = rhs_post_extra_text pos in
text pre_extras @ items @ text post_extras
let extra_str pos items = extra_text Str.text pos items
let extra_sig pos items = extra_text Sig.text pos items
let extra_cstr pos items = extra_text Cf.text pos items
let extra_csig pos items = extra_text Ctf.text pos items
let extra_def pos items =
extra_text (fun txt -> [Ptop_def (Str.text txt)]) pos items
let extra_rhs_core_type ct ~pos =
let docs = rhs_info pos in
{ ct with ptyp_attributes = add_info_attrs docs ct.ptyp_attributes }
type let_binding =
{ lb_pattern: pattern;
lb_expression: expression;
lb_attributes: attributes;
lb_docs: docs Lazy.t;
lb_text: text Lazy.t;
lb_loc: Location.t; }
type let_bindings =
{ lbs_bindings: let_binding list;
lbs_rec: rec_flag;
lbs_extension: string Asttypes.loc option;
lbs_loc: Location.t }
let mklb first (p, e) attrs =
{ lb_pattern = p;
lb_expression = e;
lb_attributes = attrs;
lb_docs = symbol_docs_lazy ();
lb_text = if first then empty_text_lazy
else symbol_text_lazy ();
lb_loc = symbol_rloc (); }
let mklbs ext rf lb =
{ lbs_bindings = [lb];
lbs_rec = rf;
lbs_extension = ext ;
lbs_loc = symbol_rloc (); }
let addlb lbs lb =
{ lbs with lbs_bindings = lb :: lbs.lbs_bindings }
let val_of_let_bindings lbs =
let bindings =
List.map
(fun lb ->
Vb.mk ~loc:lb.lb_loc ~attrs:lb.lb_attributes
~docs:(Lazy.force lb.lb_docs)
~text:(Lazy.force lb.lb_text)
lb.lb_pattern lb.lb_expression)
lbs.lbs_bindings
in
let str = mkstr(Pstr_value(lbs.lbs_rec, List.rev bindings)) in
match lbs.lbs_extension with
| None -> str
| Some id -> ghstr (Pstr_extension((id, PStr [str]), []))
let expr_of_let_bindings lbs body =
let bindings =
List.map
(fun lb ->
Vb.mk ~loc:lb.lb_loc ~attrs:lb.lb_attributes
lb.lb_pattern lb.lb_expression)
lbs.lbs_bindings
in
mkexp_attrs (Pexp_let(lbs.lbs_rec, List.rev bindings, body))
(lbs.lbs_extension, [])
let class_of_let_bindings lbs body =
let bindings =
List.map
(fun lb ->
Vb.mk ~loc:lb.lb_loc ~attrs:lb.lb_attributes
lb.lb_pattern lb.lb_expression)
lbs.lbs_bindings
in
if lbs.lbs_extension <> None then
raise Syntaxerr.(Error(Not_expecting(lbs.lbs_loc, "extension")));
mkclass(Pcl_let (lbs.lbs_rec, List.rev bindings, body))
(* Alternatively, we could keep the generic module type in the Parsetree
and extract the package type during type-checking. In that case,
the assertions below should be turned into explicit checks. *)
let package_type_of_module_type pmty =
let err loc s =
raise (Syntaxerr.Error (Syntaxerr.Invalid_package_type (loc, s)))
in
let map_cstr = function
| Pwith_type (lid, ptyp) ->
let loc = ptyp.ptype_loc in
if ptyp.ptype_params <> [] then
err loc "parametrized types are not supported";
if ptyp.ptype_cstrs <> [] then
err loc "constrained types are not supported";
if ptyp.ptype_private <> Public then
err loc "private types are not supported";
(* restrictions below are checked by the 'with_constraint' rule *)
assert (ptyp.ptype_kind = Ptype_abstract);
assert (ptyp.ptype_attributes = []);
let ty =
match ptyp.ptype_manifest with
| Some ty -> ty
| None -> assert false
in
(lid, ty)
| _ ->
err pmty.pmty_loc "only 'with type t =' constraints are supported"
in
match pmty with
| {pmty_desc = Pmty_ident lid} -> (lid, [])
| {pmty_desc = Pmty_with({pmty_desc = Pmty_ident lid}, cstrs)} ->
(lid, List.map map_cstr cstrs)
| _ ->
err pmty.pmty_loc
"only module type identifier and 'with type' constraints are supported"
%}
/* Tokens */
%token AMPERAMPER
%token AMPERSAND
%token AND
%token AS
%token ASSERT
%token BACKQUOTE
%token BANG
%token BAR
%token BARBAR
%token BARRBRACKET
%token BEGIN
%token <char> CHAR
%token CLASS
%token COLON
%token COLONCOLON
%token COLONEQUAL
%token COLONGREATER
%token COMMA
%token CONSTRAINT
%token DO
%token DONE
%token DOT
%token DOTDOT
%token DOWNTO
%token ELSE
%token END
%token EOF
%token EQUAL
%token EXCEPTION
%token EXTERNAL
%token FALSE
%token <string * char option> FLOAT
%token FOR
%token FUN
%token FUNCTION
%token FUNCTOR
%token GREATER
%token GREATERRBRACE
%token GREATERRBRACKET
%token IF
%token IN
%token INCLUDE
%token <string> INFIXOP0
%token <string> INFIXOP1
%token <string> INFIXOP2
%token <string> INFIXOP3
%token <string> INFIXOP4
%token <string> DOTOP
%token INHERIT
%token INITIALIZER
%token <string * char option> INT
%token <string> LABEL
%token LAZY
%token LBRACE
%token LBRACELESS
%token LBRACKET
%token LBRACKETBAR
%token LBRACKETLESS
%token LBRACKETGREATER
%token LBRACKETPERCENT
%token LBRACKETPERCENTPERCENT
%token LESS
%token LESSMINUS
%token LET
%token <string> LIDENT
%token LPAREN
%token LBRACKETAT
%token LBRACKETATAT
%token LBRACKETATATAT
%token MATCH
%token METHOD
%token MINUS
%token MINUSDOT
%token MINUSGREATER
%token MODULE
%token MUTABLE
%token NEW
%token NONREC
%token OBJECT
%token OF
%token OPEN
%token <string> OPTLABEL
%token OR
/* %token PARSER */
%token PERCENT
%token PLUS
%token PLUSDOT
%token PLUSEQ
%token <string> PREFIXOP
%token PRIVATE
%token QUESTION
%token QUOTE
%token RBRACE
%token RBRACKET
%token REC
%token RPAREN
%token SEMI
%token SEMISEMI
%token HASH
%token <string> HASHOP
%token SIG
%token STAR
%token <string * string option> STRING
%token STRUCT
%token THEN
%token TILDE
%token TO
%token TRUE
%token TRY
%token TYPE
%token <string> UIDENT
%token UNDERSCORE
%token VAL
%token VIRTUAL
%token WHEN
%token WHILE
%token WITH
%token <string * Location.t> COMMENT
%token <Docstrings.docstring> DOCSTRING
%token EOL
/* Precedences and associativities.
Tokens and rules have precedences. A reduce/reduce conflict is resolved
in favor of the first rule (in source file order). A shift/reduce conflict
is resolved by comparing the precedence and associativity of the token to
be shifted with those of the rule to be reduced.
By default, a rule has the precedence of its rightmost terminal (if any).
When there is a shift/reduce conflict between a rule and a token that
have the same precedence, it is resolved using the associativity:
if the token is left-associative, the parser will reduce; if
right-associative, the parser will shift; if non-associative,
the parser will declare a syntax error.
We will only use associativities with operators of the kind x * x -> x
for example, in the rules of the form expr: expr BINOP expr
in all other cases, we define two precedences if needed to resolve
conflicts.
The precedences must be listed from low to high.
*/
%nonassoc IN
%nonassoc below_SEMI
%nonassoc SEMI /* below EQUAL ({lbl=...; lbl=...}) */
%nonassoc LET /* above SEMI ( ...; let ... in ...) */
%nonassoc below_WITH
%nonassoc FUNCTION WITH /* below BAR (match ... with ...) */
%nonassoc AND /* above WITH (module rec A: SIG with ... and ...) */
%nonassoc THEN /* below ELSE (if ... then ...) */
%nonassoc ELSE /* (if ... then ... else ...) */
%nonassoc LESSMINUS /* below COLONEQUAL (lbl <- x := e) */
%right COLONEQUAL /* expr (e := e := e) */
%nonassoc AS
%left BAR /* pattern (p|p|p) */
%nonassoc below_COMMA
%left COMMA /* expr/expr_comma_list (e,e,e) */
%right MINUSGREATER /* core_type2 (t -> t -> t) */
%right OR BARBAR /* expr (e || e || e) */
%right AMPERSAND AMPERAMPER /* expr (e && e && e) */
%nonassoc below_EQUAL
%left INFIXOP0 EQUAL LESS GREATER /* expr (e OP e OP e) */
%right INFIXOP1 /* expr (e OP e OP e) */
%nonassoc below_LBRACKETAT
%nonassoc LBRACKETAT
%nonassoc LBRACKETATAT
%right COLONCOLON /* expr (e :: e :: e) */
%left INFIXOP2 PLUS PLUSDOT MINUS MINUSDOT PLUSEQ /* expr (e OP e OP e) */
%left PERCENT INFIXOP3 STAR /* expr (e OP e OP e) */
%right INFIXOP4 /* expr (e OP e OP e) */
%nonassoc prec_unary_minus prec_unary_plus /* unary - */
%nonassoc prec_constant_constructor /* cf. simple_expr (C versus C x) */
%nonassoc prec_constr_appl /* above AS BAR COLONCOLON COMMA */
%nonassoc below_HASH
%nonassoc HASH /* simple_expr/toplevel_directive */
%left HASHOP
%nonassoc below_DOT
%nonassoc DOT
/* Finally, the first tokens of simple_expr are above everything else. */
%nonassoc BACKQUOTE BANG BEGIN CHAR FALSE FLOAT INT
LBRACE LBRACELESS LBRACKET LBRACKETBAR LIDENT LPAREN
NEW PREFIXOP STRING TRUE UIDENT
LBRACKETPERCENT LBRACKETPERCENTPERCENT
/* Entry points */
%start implementation /* for implementation files */
%type <Parsetree.structure> implementation
%start interface /* for interface files */
%type <Parsetree.signature> interface
%start toplevel_phrase /* for interactive use */
%type <Parsetree.toplevel_phrase> toplevel_phrase
%start use_file /* for the #use directive */
%type <Parsetree.toplevel_phrase list> use_file
%start parse_core_type
%type <Parsetree.core_type> parse_core_type
%start parse_expression
%type <Parsetree.expression> parse_expression
%start parse_pattern
%type <Parsetree.pattern> parse_pattern
%%
/* Entry points */
implementation:
structure EOF { extra_str 1 $1 }
;
interface:
signature EOF { extra_sig 1 $1 }
;
toplevel_phrase:
top_structure SEMISEMI { Ptop_def (extra_str 1 $1) }
| toplevel_directive SEMISEMI { $1 }
| EOF { raise End_of_file }
;
top_structure:
seq_expr post_item_attributes
{ (text_str 1) @ [mkstrexp $1 $2] }
| top_structure_tail
{ $1 }
;
top_structure_tail:
/* empty */ { [] }
| structure_item top_structure_tail { (text_str 1) @ $1 :: $2 }
;
use_file:
use_file_body { extra_def 1 $1 }
;
use_file_body:
use_file_tail { $1 }
| seq_expr post_item_attributes use_file_tail
{ (text_def 1) @ Ptop_def[mkstrexp $1 $2] :: $3 }
;
use_file_tail:
EOF
{ [] }
| SEMISEMI EOF
{ text_def 1 }
| SEMISEMI seq_expr post_item_attributes use_file_tail
{ mark_rhs_docs 2 3;
(text_def 1) @ (text_def 2) @ Ptop_def[mkstrexp $2 $3] :: $4 }
| SEMISEMI structure_item use_file_tail
{ (text_def 1) @ (text_def 2) @ Ptop_def[$2] :: $3 }
| SEMISEMI toplevel_directive use_file_tail
{ mark_rhs_docs 2 3;
(text_def 1) @ (text_def 2) @ $2 :: $3 }
| structure_item use_file_tail
{ (text_def 1) @ Ptop_def[$1] :: $2 }
| toplevel_directive use_file_tail
{ mark_rhs_docs 1 1;
(text_def 1) @ $1 :: $2 }
;
parse_core_type:
core_type EOF { $1 }
;
parse_expression:
seq_expr EOF { $1 }
;
parse_pattern:
pattern EOF { $1 }
;
/* Module expressions */
functor_arg:
LPAREN RPAREN
{ mkrhs "*" 2, None }
| LPAREN functor_arg_name COLON module_type RPAREN
{ mkrhs $2 2, Some $4 }
;
functor_arg_name:
UIDENT { $1 }
| UNDERSCORE { "_" }
;
functor_args:
functor_args functor_arg
{ $2 :: $1 }
| functor_arg
{ [ $1 ] }
;
module_expr:
mod_longident
{ mkmod(Pmod_ident (mkrhs $1 1)) }
| STRUCT attributes structure END
{ mkmod ~attrs:$2 (Pmod_structure(extra_str 3 $3)) }
| STRUCT attributes structure error
{ unclosed "struct" 1 "end" 4 }
| FUNCTOR attributes functor_args MINUSGREATER module_expr
{ let modexp =
List.fold_left
(fun acc (n, t) -> mkmod(Pmod_functor(n, t, acc)))
$5 $3
in wrap_mod_attrs modexp $2 }
| module_expr paren_module_expr
{ mkmod(Pmod_apply($1, $2)) }
| module_expr LPAREN RPAREN
{ mkmod(Pmod_apply($1, mkmod (Pmod_structure []))) }
| paren_module_expr
{ $1 }
| module_expr attribute
{ Mod.attr $1 $2 }
| extension
{ mkmod(Pmod_extension $1) }
;
paren_module_expr:
LPAREN module_expr COLON module_type RPAREN
{ mkmod(Pmod_constraint($2, $4)) }
| LPAREN module_expr COLON module_type error
{ unclosed "(" 1 ")" 5 }
| LPAREN module_expr RPAREN
{ $2 }
| LPAREN module_expr error
{ unclosed "(" 1 ")" 3 }
| LPAREN VAL attributes expr RPAREN
{ mkmod ~attrs:$3 (Pmod_unpack $4)}
| LPAREN VAL attributes expr COLON package_type RPAREN
{ mkmod ~attrs:$3
(Pmod_unpack(
ghexp(Pexp_constraint($4, ghtyp(Ptyp_package $6))))) }
| LPAREN VAL attributes expr COLON package_type COLONGREATER package_type
RPAREN
{ mkmod ~attrs:$3
(Pmod_unpack(
ghexp(Pexp_coerce($4, Some(ghtyp(Ptyp_package $6)),
ghtyp(Ptyp_package $8))))) }
| LPAREN VAL attributes expr COLONGREATER package_type RPAREN
{ mkmod ~attrs:$3
(Pmod_unpack(
ghexp(Pexp_coerce($4, None, ghtyp(Ptyp_package $6))))) }
| LPAREN VAL attributes expr COLON error
{ unclosed "(" 1 ")" 6 }
| LPAREN VAL attributes expr COLONGREATER error
{ unclosed "(" 1 ")" 6 }
| LPAREN VAL attributes expr error
{ unclosed "(" 1 ")" 5 }
;
structure:
seq_expr post_item_attributes structure_tail
{ mark_rhs_docs 1 2;
(text_str 1) @ mkstrexp $1 $2 :: $3 }
| structure_tail { $1 }
;
structure_tail:
/* empty */ { [] }
| SEMISEMI structure { (text_str 1) @ $2 }
| structure_item structure_tail { (text_str 1) @ $1 :: $2 }
;
structure_item:
let_bindings
{ val_of_let_bindings $1 }
| primitive_declaration
{ let (body, ext) = $1 in mkstr_ext (Pstr_primitive body) ext }
| value_description
{ let (body, ext) = $1 in mkstr_ext (Pstr_primitive body) ext }
| type_declarations
{ let (nr, l, ext ) = $1 in mkstr_ext (Pstr_type (nr, List.rev l)) ext }
| str_type_extension
{ let (l, ext) = $1 in mkstr_ext (Pstr_typext l) ext }
| str_exception_declaration
{ let (l, ext) = $1 in mkstr_ext (Pstr_exception l) ext }
| module_binding
{ let (body, ext) = $1 in mkstr_ext (Pstr_module body) ext }
| rec_module_bindings
{ let (l, ext) = $1 in mkstr_ext (Pstr_recmodule(List.rev l)) ext }
| module_type_declaration
{ let (body, ext) = $1 in mkstr_ext (Pstr_modtype body) ext }
| open_statement
{ let (body, ext) = $1 in mkstr_ext (Pstr_open body) ext }
| class_declarations
{ let (l, ext) = $1 in mkstr_ext (Pstr_class (List.rev l)) ext }
| class_type_declarations
{ let (l, ext) = $1 in mkstr_ext (Pstr_class_type (List.rev l)) ext }
| str_include_statement
{ let (body, ext) = $1 in mkstr_ext (Pstr_include body) ext }
| item_extension post_item_attributes
{ mkstr(Pstr_extension ($1, (add_docs_attrs (symbol_docs ()) $2))) }
| floating_attribute
{ mark_symbol_docs ();
mkstr(Pstr_attribute $1) }
;
str_include_statement:
INCLUDE ext_attributes module_expr post_item_attributes
{ let (ext, attrs) = $2 in
Incl.mk $3 ~attrs:(attrs@$4)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext }
;
module_binding_body:
EQUAL module_expr
{ $2 }
| COLON module_type EQUAL module_expr
{ mkmod(Pmod_constraint($4, $2)) }
| functor_arg module_binding_body
{ mkmod(Pmod_functor(fst $1, snd $1, $2)) }
;
module_binding:
MODULE ext_attributes UIDENT module_binding_body post_item_attributes
{ let (ext, attrs) = $2 in
Mb.mk (mkrhs $3 3) $4 ~attrs:(attrs@$5)
~loc:(symbol_rloc ()) ~docs:(symbol_docs ())
, ext }
;
rec_module_bindings:
rec_module_binding { let (b, ext) = $1 in ([b], ext) }
| rec_module_bindings and_module_binding
{ let (l, ext) = $1 in ($2 :: l, ext) }
;
rec_module_binding:
MODULE ext_attributes REC UIDENT module_binding_body post_item_attributes
{ let (ext, attrs) = $2 in
Mb.mk (mkrhs $4 4) $5 ~attrs:(attrs@$6)
~loc:(symbol_rloc ()) ~docs:(symbol_docs ())
, ext }
;
and_module_binding:
AND attributes UIDENT module_binding_body post_item_attributes
{ Mb.mk (mkrhs $3 3) $4 ~attrs:($2@$5) ~loc:(symbol_rloc ())
~text:(symbol_text ()) ~docs:(symbol_docs ()) }
;
/* Module types */
module_type:
mty_longident
{ mkmty(Pmty_ident (mkrhs $1 1)) }
| SIG attributes signature END
{ mkmty ~attrs:$2 (Pmty_signature (extra_sig 3 $3)) }
| SIG attributes signature error
{ unclosed "sig" 1 "end" 4 }
| FUNCTOR attributes functor_args MINUSGREATER module_type
%prec below_WITH
{ let mty =
List.fold_left
(fun acc (n, t) -> mkmty(Pmty_functor(n, t, acc)))
$5 $3
in wrap_mty_attrs mty $2 }
| module_type MINUSGREATER module_type
%prec below_WITH
{ mkmty(Pmty_functor(mknoloc "_", Some $1, $3)) }
| module_type WITH with_constraints
{ mkmty(Pmty_with($1, List.rev $3)) }
| MODULE TYPE OF attributes module_expr %prec below_LBRACKETAT
{ mkmty ~attrs:$4 (Pmty_typeof $5) }
/* | LPAREN MODULE mod_longident RPAREN
{ mkmty (Pmty_alias (mkrhs $3 3)) } */
| LPAREN module_type RPAREN
{ $2 }
| LPAREN module_type error
{ unclosed "(" 1 ")" 3 }
| extension
{ mkmty(Pmty_extension $1) }
| module_type attribute
{ Mty.attr $1 $2 }
;
signature:
/* empty */ { [] }
| SEMISEMI signature { (text_sig 1) @ $2 }
| signature_item signature { (text_sig 1) @ $1 :: $2 }
;
signature_item:
value_description
{ let (body, ext) = $1 in mksig_ext (Psig_value body) ext }
| primitive_declaration
{ let (body, ext) = $1 in mksig_ext (Psig_value body) ext}
| type_declarations
{ let (nr, l, ext) = $1 in mksig_ext (Psig_type (nr, List.rev l)) ext }
| sig_type_extension
{ let (l, ext) = $1 in mksig_ext (Psig_typext l) ext }
| sig_exception_declaration
{ let (l, ext) = $1 in mksig_ext (Psig_exception l) ext }
| module_declaration
{ let (body, ext) = $1 in mksig_ext (Psig_module body) ext }
| module_alias
{ let (body, ext) = $1 in mksig_ext (Psig_module body) ext }
| rec_module_declarations
{ let (l, ext) = $1 in mksig_ext (Psig_recmodule (List.rev l)) ext }
| module_type_declaration
{ let (body, ext) = $1 in mksig_ext (Psig_modtype body) ext }
| open_statement
{ let (body, ext) = $1 in mksig_ext (Psig_open body) ext }
| sig_include_statement
{ let (body, ext) = $1 in mksig_ext (Psig_include body) ext }
| class_descriptions
{ let (l, ext) = $1 in mksig_ext (Psig_class (List.rev l)) ext }
| class_type_declarations
{ let (l, ext) = $1 in mksig_ext (Psig_class_type (List.rev l)) ext }
| item_extension post_item_attributes
{ mksig(Psig_extension ($1, (add_docs_attrs (symbol_docs ()) $2))) }
| floating_attribute
{ mark_symbol_docs ();
mksig(Psig_attribute $1) }
;
open_statement:
| OPEN override_flag ext_attributes mod_longident post_item_attributes
{ let (ext, attrs) = $3 in
Opn.mk (mkrhs $4 4) ~override:$2 ~attrs:(attrs@$5)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext}
;
sig_include_statement:
INCLUDE ext_attributes module_type post_item_attributes %prec below_WITH
{ let (ext, attrs) = $2 in
Incl.mk $3 ~attrs:(attrs@$4)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext}
;
module_declaration_body:
COLON module_type
{ $2 }
| LPAREN UIDENT COLON module_type RPAREN module_declaration_body
{ mkmty(Pmty_functor(mkrhs $2 2, Some $4, $6)) }
| LPAREN RPAREN module_declaration_body
{ mkmty(Pmty_functor(mkrhs "*" 1, None, $3)) }
;
module_declaration:
MODULE ext_attributes UIDENT module_declaration_body post_item_attributes
{ let (ext, attrs) = $2 in
Md.mk (mkrhs $3 3) $4 ~attrs:(attrs@$5)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext }
;
module_alias:
MODULE ext_attributes UIDENT EQUAL mod_longident post_item_attributes
{ let (ext, attrs) = $2 in
Md.mk (mkrhs $3 3)
(Mty.alias ~loc:(rhs_loc 5) (mkrhs $5 5)) ~attrs:(attrs@$6)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext }
;
rec_module_declarations:
rec_module_declaration
{ let (body, ext) = $1 in ([body], ext) }
| rec_module_declarations and_module_declaration
{ let (l, ext) = $1 in ($2 :: l, ext) }
;
rec_module_declaration:
MODULE ext_attributes REC UIDENT COLON module_type post_item_attributes
{ let (ext, attrs) = $2 in
Md.mk (mkrhs $4 4) $6 ~attrs:(attrs@$7)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext}
;
and_module_declaration:
AND attributes UIDENT COLON module_type post_item_attributes
{ Md.mk (mkrhs $3 3) $5 ~attrs:($2@$6) ~loc:(symbol_rloc())
~text:(symbol_text()) ~docs:(symbol_docs()) }
;
module_type_declaration_body:
/* empty */ { None }
| EQUAL module_type { Some $2 }
;
module_type_declaration:
MODULE TYPE ext_attributes ident module_type_declaration_body
post_item_attributes
{ let (ext, attrs) = $3 in
Mtd.mk (mkrhs $4 4) ?typ:$5 ~attrs:(attrs@$6)
~loc:(symbol_rloc()) ~docs:(symbol_docs ())
, ext }
;
/* Class expressions */
class_declarations:
class_declaration
{ let (body, ext) = $1 in ([body], ext) }
| class_declarations and_class_declaration
{ let (l, ext) = $1 in ($2 :: l, ext) }
;
class_declaration:
CLASS ext_attributes virtual_flag class_type_parameters LIDENT
class_fun_binding post_item_attributes
{ let (ext, attrs) = $2 in