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|
/**************************************************************************/
/* */
/* The Why platform for program certification */
/* Copyright (C) 2002-2008 */
/* Romain BARDOU */
/* Jean-Franois COUCHOT */
/* Mehdi DOGGUY */
/* Jean-Christophe FILLITRE */
/* Thierry HUBERT */
/* Claude MARCH */
/* Yannick MOY */
/* Christine PAULIN */
/* Yann RGIS-GIANAS */
/* Nicolas ROUSSET */
/* Xavier URBAIN */
/* */
/* This software is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public */
/* License version 2, as published by the Free Software Foundation. */
/* */
/* This software is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */
/* */
/* See the GNU General Public License version 2 for more details */
/* (enclosed in the file GPL). */
/* */
/**************************************************************************/
/* from http://www.lysator.liu.se/c/ANSI-C-grammar-y.html */
%{
open Format
open Coptions
open Ptree
open Ctypes
open Cast
open Parsing
open Cerror
let loc () = (symbol_start_pos (), symbol_end_pos ())
let loc_i i = (rhs_start_pos i, rhs_end_pos i)
let locate x = { node = x; loc = loc() }
let locate_i i x = { node = x; loc = loc_i i }
let with_loc l x = { node = x; loc = l }
let error s =
Creport.raise_located (loc ()) (AnyMessage ("Syntax error: " ^ s))
let uns () = error "Unsupported C syntax"
let unss s = error ("Unsupported C syntax: " ^ s)
let warning s =
Format.eprintf "%a warning: %s\n" Loc.report_line (symbol_start_pos ()) s
let vwarning s = if verbose then warning s
let dwarning s = if debug then warning s
let no_loop_annot =
{ Clogic.invariant = None;
Clogic.assume_invariant = None;
Clogic.loop_assigns = None;
Clogic.variant = None }
let add_pre_loc lb = function
| Some (b,_) -> Loc.join (b,0) lb
| _ -> lb
let expr_of_statement s = match s.node with
| CSnop -> { node = CEnop; loc = s.loc }
| CSexpr e -> e
| _ -> assert false
(* used only for parsing types *)
type specifier =
| Stypedef
| Sstorage of storage_class
| Stype of cexpr ctype_node
| Slong
| Sshort
| Sconst
| Svolatile
| Srestrict
| Ssign of sign
| Sstruct_decl of string option * fields
| Sunion_decl of string option * fields
and specifiers = specifier list
and declarator =
| Dsimple
| Dpointer of declarator
| Darray of declarator * cexpr option
| Dfunction of declarator * parameters
and parameters = (specifiers * declarator * string) list
and fields = (specifiers * declarator * string * cexpr option) list
(* interps a list of specifiers / declarators as a [ctype] *)
(* TODO: short/long *)
let storage_class =
let rec loop st = function
| [] ->
st
| Sstorage st' :: s when st = No_storage ->
loop st' s
| Sstorage st' :: s when st' = st ->
warning "duplicate storage class"; loop st s
| Sstorage st' :: _ ->
error "multiple storage class"
| _ :: s ->
loop st s
in
loop No_storage
let sign =
let rec loop so = function
| [] ->
so
| Ssign b' :: sp ->
(match so with
| None -> loop (Some b') sp
| Some b when b = b' -> warning "duplicate (un)signed"; loop so sp
| Some b -> error "both signed and unsigned")
| _ :: sp ->
loop so sp
in
loop None
let apply_sign sg ty = match sg, ty with
| None, _ -> ty
| Some b, (CTint (_, i)) -> CTint (b, i)
| Some _, _ -> error "signed or unsigned invalid"
type length = Short | Long | LongLong
let length =
let rec loop lo = function
| [] ->
lo
| (Sshort | Slong as s) :: sp ->
(match s, lo with
| Sshort, None ->
loop (Some Short) sp
| Slong, None ->
loop (Some Long) sp
| Sshort, Some Short ->
warning "duplicate short"; loop lo sp
| Sshort, Some (Long | LongLong) | Slong, Some Short ->
error "both long and short specified"
| Slong, Some Long ->
loop (Some LongLong) sp
| Slong, Some LongLong ->
error "too long for caduceus"
| _ ->
assert false)
| _ :: sp ->
loop lo sp
in
loop None
let apply_length lg ty = match lg, ty with
| None, _ -> ty
| Some Short, (CTint (s, _)) -> CTint (s, Cast.Short)
| Some Long, (CTint (s, _)) -> CTint (s, Cast.Long)
| Some LongLong, (CTint (s, _)) -> CTint (s, Cast.LongLong)
| Some Long, CTfloat Double -> CTfloat LongDouble
| Some _, CTfloat Float
| Some Short, CTfloat _ ->
error "long or short specified with floating type"
| Some LongLong, CTfloat _ ->
error "the only valid combination is `long double'"
| Some _, _ -> ty
(* debug *)
let rec explain_type fmt = function
| CTfun (_, t) ->
fprintf fmt "function returning %a" explain_type t.ctype_node
| CTpointer t ->
fprintf fmt "pointer on %a" explain_type t.ctype_node
| CTarray (t, _) ->
fprintf fmt "array[] of %a" explain_type t.ctype_node
| _ ->
fprintf fmt "other"
(* fresh names for anonymous structures *)
let fresh_name =
let r = ref (-1) in
function
| Some s -> s
| None -> incr r; "anonymous_" ^ string_of_int !r
(* Interpretation of type expression.
[gl] indicates a global declaration (implies the check for a type or
a storage class) *)
let rec interp_type gl specs decl =
let st = storage_class specs in
let cst = List.exists ((=) Sconst) specs in
let vl = List.exists ((=) Svolatile) specs in
let sg = sign specs in
let lg = length specs in
let rec base_type tyo = function
| [] ->
(match tyo with
| Some ty -> ty
| None when gl && st = No_storage && sg = None && lg = None ->
error "data definition has no type or storage class"
| None -> CTint (Signed, Int))
| Stype t :: sp when tyo = None ->
base_type (Some t) sp
| Sstruct_decl (so, pl) :: sp when tyo = None ->
base_type (Some (CTstruct (fresh_name so, Decl (fields pl)))) sp
| Sunion_decl (so, pl) :: sp when tyo = None ->
base_type (Some (CTunion (fresh_name so, Decl (fields pl)))) sp
| (Stype _ | Sstruct_decl _ | Sunion_decl _) :: _ ->
error "two or more data types in declaration"
| _ :: sp ->
base_type tyo sp
and full_type ty = function
| Dsimple -> ty
| Dpointer d -> full_type (Cast_misc.noattr (CTpointer ty)) d
| Darray (d, so) -> full_type (Cast_misc.noattr (CTarray (ty, so))) d
| Dfunction (d, pl) -> full_type (Cast_misc.noattr (CTfun (params pl, ty))) d
and params pl =
List.map (fun (s,d,x) -> (interp_type false s d, x)) pl
and fields fl =
List.map (fun (s,d,x,bf) -> (interp_type false s d, x, bf)) fl
in
let bt = base_type None specs in
let bt = apply_sign sg bt in
let bt = apply_length lg bt in
let bt = { ctype_node = bt; ctype_storage = st;
ctype_const = cst; ctype_volatile = vl }
in
let ty = full_type bt decl in
if debug then eprintf "%a@." explain_type ty.ctype_node;
ty
let interp_param (s, d, id) = interp_type false s d, id
let interp_params = List.map interp_param
let is_typedef = List.exists ((=) Stypedef)
let declaration specs decls =
if is_typedef specs then
let interp = function
| (n,d), None ->
Ctypes.add n; Ctypedef (interp_type true specs d, n)
| (n,_), _ ->
error ("typedef " ^ n ^ " is initialized")
in
List.map interp decls
else
let interp ((n,d),i) =
Ctypes.remove n; Cdecl (interp_type true specs d, n, i)
in
List.map interp decls
let spec_declaration s specs decls =
match declaration specs decls with
| [Cdecl ({ ctype_node = CTfun (pl, ty) }, f, _)] ->
Cfunspec (s, ty, f, pl)
| _ ->
raise Parsing.Parse_error
let type_declarations specs =
if is_typedef specs then warning "useless keyword in empty declaration";
let ty = interp_type true specs Dsimple in
match ty.ctype_node with
| CTstruct _ | CTunion _ | CTenum _ ->
[ locate (Ctypedecl ty) ]
| _ ->
warning "empty declaration";
[]
(* old style function prototype: f(x,y,z) t1 x; t2 y; ...
some parameters may be omitted *)
let old_style_params pl decls =
let pids = List.map (fun (_,x) -> x) pl in
let h = Hashtbl.create 17 in
(* we first check that no parameter is initialized or occurs twice *)
List.iter
(fun d -> match d.node with
| Cdecl (ty, x, None) ->
if not (List.mem x pids) then
error ("declaration for " ^ x ^ " but no such parameter");
if Hashtbl.mem h x then error ("duplicate declaration for " ^ x);
Hashtbl.add h x ty
| Cdecl (_,x,_) -> error ("parameter " ^ x ^ " is initialized")
| _ -> ())
decls;
(* do it for all parameters *)
List.map (fun (tx, x) -> (try Hashtbl.find h x with Not_found -> tx), x) pl
let function_declaration specs (id,d) decls =
let ty = interp_type false specs d in
match ty.ctype_node with
| CTfun (pl, tyf) ->
let pl =
if decls = [] then pl else old_style_params pl decls
in
List.iter (fun (_,x) -> Ctypes.remove x) pl;
tyf, id, pl
| _ ->
raise Parsing.Parse_error
%}
%token <Cast.parsed_spec> SPEC
%token <Cast.parsed_decl list> DECL
%token <Cast.parsed_code_annot> CODE_ANNOT
%token <Cast.parsed_loop_annot> LOOP_ANNOT
%token <Clogic.constant> CONSTANT
%token <string> IDENTIFIER STRING_LITERAL TYPE_NAME
%token SIZEOF
%token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
%token AND_OP OR_OP MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
%token SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
%token XOR_ASSIGN OR_ASSIGN
%token TYPEDEF EXTERN STATIC AUTO REGISTER
%token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE CONST VOLATILE VOID
%token STRUCT UNION ENUM ELLIPSIS
%token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
%token SEMICOLON LBRACE RBRACE COMMA COLON EQUAL LPAR RPAR LSQUARE RSQUARE
%token DOT AMP EXL TILDE MINUS PLUS STAR SLASH PERCENT LT GT HAT PIPE
%token QUESTION EOF
/* non-ANSI tokens */
%token ATTRIBUTE RESTRICT
%nonassoc specs
%nonassoc TYPE_NAME
%nonassoc no_annot
/* %nonassoc ANNOT */
%type <Cast.file> file
%start file
%%
file
: translation_unit EOF { $1 }
| EOF { [] }
;
primary_expression
: IDENTIFIER { locate (CEvar $1) }
| CONSTANT { locate (CEconstant $1) }
| STRING_LITERAL { locate (CEstring_literal $1) }
| LPAR expression RPAR { $2 }
;
postfix_expression
: primary_expression
{ $1 }
| postfix_expression LSQUARE expression RSQUARE
{ locate (CEarrget ($1, $3)) }
| postfix_expression LPAR RPAR
{ locate (CEcall ($1, [])) }
| postfix_expression LPAR argument_expression_list RPAR
{ locate (CEcall ($1, $3)) }
| postfix_expression DOT identifier/*ICI*/
{ locate (CEdot ($1, $3)) }
| postfix_expression PTR_OP identifier/*ICI*/
{ locate (CEarrow ($1, $3)) }
| postfix_expression INC_OP
{ locate (CEincr (Upostfix_inc, $1)) }
| postfix_expression DEC_OP
{ locate (CEincr (Upostfix_dec, $1)) }
;
argument_expression_list
: assignment_expression { [$1] }
| argument_expression_list COMMA assignment_expression { $1 @ [$3] }
;
unary_expression
: postfix_expression { $1 }
| INC_OP unary_expression { locate (CEincr (Uprefix_inc, $2)) }
| DEC_OP unary_expression { locate (CEincr (Uprefix_dec, $2)) }
| unary_operator cast_expression { locate (CEunary ($1, $2)) }
| SIZEOF unary_expression { locate (CEsizeof_expr $2) }
| SIZEOF LPAR type_name RPAR
{ let s,d = $3 in locate (CEsizeof (interp_type false s d)) }
;
unary_operator
: AMP { Uamp }
| STAR { Ustar }
| PLUS { Uplus }
| MINUS { Uminus }
| TILDE { Utilde }
| EXL { Unot }
;
cast_expression
: unary_expression { $1 }
| LPAR type_name RPAR cast_expression
{ let s,d = $2 in locate (CEcast (interp_type false s d, $4)) }
;
multiplicative_expression
: cast_expression
{ $1 }
| multiplicative_expression STAR cast_expression
{ locate (CEbinary ($1, Bmul, $3)) }
| multiplicative_expression SLASH cast_expression
{ locate (CEbinary ($1, Bdiv, $3)) }
| multiplicative_expression PERCENT cast_expression
{ locate (CEbinary ($1, Bmod, $3)) }
;
additive_expression
: multiplicative_expression
{ $1 }
| additive_expression PLUS multiplicative_expression
{ locate (CEbinary ($1, Badd, $3)) }
| additive_expression MINUS multiplicative_expression
{ locate (CEbinary ($1, Bsub, $3)) }
;
shift_expression
: additive_expression { $1 }
| shift_expression LEFT_OP additive_expression
{ locate (CEbinary ($1, Bshift_left, $3)) }
| shift_expression RIGHT_OP additive_expression
{ locate (CEbinary ($1, Bshift_right, $3)) }
;
relational_expression
: shift_expression
{ $1 }
| relational_expression LT shift_expression
{ locate (CEbinary ($1, Blt, $3)) }
| relational_expression GT shift_expression
{ locate (CEbinary ($1, Bgt, $3)) }
| relational_expression LE_OP shift_expression
{ locate (CEbinary ($1, Ble, $3)) }
| relational_expression GE_OP shift_expression
{ locate (CEbinary ($1, Bge, $3)) }
;
equality_expression
: relational_expression
{ $1 }
| equality_expression EQ_OP relational_expression
{ locate (CEbinary ($1, Beq, $3)) }
| equality_expression NE_OP relational_expression
{ locate (CEbinary ($1, Bneq, $3)) }
;
and_expression
: equality_expression
{ $1 }
| and_expression AMP equality_expression
{ locate (CEbinary ($1, Bbw_and, $3)) }
;
exclusive_or_expression
: and_expression
{ $1 }
| exclusive_or_expression HAT and_expression
{ locate (CEbinary ($1, Bbw_xor, $3)) }
;
inclusive_or_expression
: exclusive_or_expression
{ $1 }
| inclusive_or_expression PIPE exclusive_or_expression
{ locate (CEbinary ($1, Bbw_or, $3)) }
;
logical_and_expression
: inclusive_or_expression
{ $1 }
| logical_and_expression AND_OP inclusive_or_expression
{ locate (CEbinary ($1, Band, $3)) }
;
logical_or_expression
: logical_and_expression
{ $1 }
| logical_or_expression OR_OP logical_and_expression
{ locate (CEbinary ($1, Bor, $3)) }
;
conditional_expression
: logical_or_expression
{ $1 }
| logical_or_expression QUESTION expression COLON conditional_expression
{ locate (CEcond ($1, $3, $5)) }
;
assignment_expression
: conditional_expression
{ $1 }
| unary_expression assignment_operator assignment_expression
{ locate (match $2 with
| Aequal -> CEassign ($1, $3)
| Amul -> CEassign_op ($1, Bmul, $3)
| Adiv -> CEassign_op ($1, Bdiv, $3)
| Amod -> CEassign_op ($1, Bmod, $3)
| Aadd -> CEassign_op ($1, Badd, $3)
| Asub -> CEassign_op ($1, Bsub, $3)
| Aleft -> CEassign_op ($1, Bshift_left, $3)
| Aright -> CEassign_op ($1, Bshift_right, $3)
| Aand -> CEassign_op ($1, Bbw_and, $3)
| Axor -> CEassign_op ($1, Bbw_xor, $3)
| Aor -> CEassign_op ($1, Bbw_or, $3)) }
;
assignment_operator
: EQUAL { Aequal }
| MUL_ASSIGN { Amul }
| DIV_ASSIGN { Adiv }
| MOD_ASSIGN { Amod }
| ADD_ASSIGN { Aadd }
| SUB_ASSIGN { Asub }
| LEFT_ASSIGN { Aleft }
| RIGHT_ASSIGN { Aright }
| AND_ASSIGN { Aand }
| XOR_ASSIGN { Axor }
| OR_ASSIGN { Aor }
;
expression
: assignment_expression { $1 }
| expression COMMA assignment_expression { locate (CEseq ($1, $3)) }
;
constant_expression
: conditional_expression { $1 }
;
declaration
: declaration_specifiers SEMICOLON
{ type_declarations $1 }
| declaration_specifiers init_declarator_list attributes_opt SEMICOLON
{ List.map locate (declaration $1 $2) }
| SPEC
declaration_specifiers init_declarator_list attributes_opt SEMICOLON
{ [locate (spec_declaration $1 $2 $3)] }
| DECL /* ADDED FOR WHY */
{ List.map (fun d -> locate (Cspecdecl d)) $1 }
;
/* the precedence specs indicates to keep going with declaration_specifiers */
declaration_specifiers
: storage_class_specifier %prec specs { [$1] }
| storage_class_specifier declaration_specifiers { $1 :: $2 }
| type_specifier { [$1] }
| type_specifier declaration_specifiers_no_name { $1 :: $2 }
| type_qualifier %prec specs { [$1] }
| type_qualifier declaration_specifiers { $1 :: $2 }
;
/* same thing, with TYPE_NAME no more allowed */
declaration_specifiers_no_name
: storage_class_specifier %prec specs { [$1] }
| storage_class_specifier declaration_specifiers_no_name { $1 :: $2 }
| type_specifier_no_name { [$1] }
| type_specifier_no_name declaration_specifiers_no_name { $1 :: $2 }
| type_qualifier %prec specs { [$1] }
| type_qualifier declaration_specifiers { $1 :: $2 }
;
init_declarator_list
: init_declarator { [$1] }
| init_declarator_list COMMA init_declarator { $1 @ [$3] }
;
init_declarator
: declarator
{ $1, None }
| declarator EQUAL c_initializer
{ $1, Some $3 }
;
storage_class_specifier
: TYPEDEF { Stypedef }
| EXTERN { Sstorage Extern }
| STATIC { Sstorage Static }
| AUTO { Sstorage Auto }
| REGISTER { Sstorage Register }
;
type_specifier
: type_specifier_no_name { $1 }
| TYPE_NAME { Stype (CTvar $1) }
;
type_specifier_no_name
: VOID { Stype CTvoid }
| CHAR { Stype (CTint (Unsigned, Char)) }
| SHORT { Sshort }
| INT { Stype (CTint (Signed, Int)) }
| LONG { Slong }
| FLOAT { Stype (CTfloat Float) }
| DOUBLE { Stype (CTfloat Double) }
| SIGNED { Ssign Signed }
| UNSIGNED { Ssign Unsigned }
| struct_or_union_specifier { $1 }
| enum_specifier { $1 }
;
identifier
: IDENTIFIER { $1 }
| TYPE_NAME { $1 }
;
struct_or_union_specifier
: struct_or_union identifier/*ICI*/ LBRACE struct_declaration_list RBRACE
{ if $1 then
Sstruct_decl (Some $2, $4)
else
Sunion_decl (Some $2, $4) }
| struct_or_union LBRACE struct_declaration_list RBRACE
{ if $1 then Sstruct_decl (None, $3) else Sunion_decl (None, $3) }
| struct_or_union identifier/*ICI*/
{ Stype (if $1 then CTstruct ($2, Tag) else CTunion ($2, Tag)) }
;
struct_or_union
: STRUCT { true }
| UNION { false }
;
struct_declaration_list
: struct_declaration { $1 }
| struct_declaration_list struct_declaration { $1 @ $2 }
;
struct_declaration
: specifier_qualifier_list struct_declarator_list SEMICOLON
{ let s = $1 in List.map (fun ((id,d),bf) -> s,d,id,bf) $2 }
;
specifier_qualifier_list
: type_specifier specifier_qualifier_list_no_name { $1 :: $2 }
| type_specifier { [$1] }
| type_qualifier specifier_qualifier_list { $1 :: $2 }
| type_qualifier %prec specs { [$1] }
;
/* same thing, with TYPE_NAME no more allowed */
specifier_qualifier_list_no_name
: type_specifier_no_name specifier_qualifier_list_no_name { $1 :: $2 }
| type_specifier_no_name { [$1] }
| type_qualifier specifier_qualifier_list_no_name { $1 :: $2 }
| type_qualifier { [$1] }
;
struct_declarator_list
: struct_declarator { [$1] }
| struct_declarator_list COMMA struct_declarator { $1 @ [$3] }
;
struct_declarator
: declarator
{ $1, None }
| COLON constant_expression
{ ("_", Dsimple), Some $2 }
| declarator COLON constant_expression
{ $1, Some $3 }
;
enum_specifier
: ENUM LBRACE enumerator_list RBRACE
{ Stype (CTenum (fresh_name None, Decl $3)) }
| ENUM identifier/*ICI*/ LBRACE enumerator_list RBRACE
{ Stype (CTenum ($2, Decl $4)) }
| ENUM identifier/*ICI*/
{ Stype (CTenum ($2, Tag)) }
;
enumerator_list
: enumerator { [$1] }
| enumerator_list COMMA enumerator { $1 @ [$3] }
;
enumerator
: IDENTIFIER { $1, None }
| IDENTIFIER EQUAL constant_expression { $1, Some $3 }
;
type_qualifier
: CONST { Sconst }
| VOLATILE { Svolatile }
| RESTRICT { dwarning "ignored __restrict"; Srestrict }
;
declarator
: pointer direct_declarator { let id,d = $2 in id, $1 d }
| direct_declarator { $1 }
;
direct_declarator
: identifier
{ $1, Dsimple }
| LPAR declarator RPAR
{ $2 }
| direct_declarator LSQUARE constant_expression RSQUARE
{ let id,d = $1 in id, Darray (d, Some $3) }
| direct_declarator LSQUARE RSQUARE
{ let id,d = $1 in id, Darray (d, None) }
| direct_declarator LPAR parameter_type_list RPAR
{ let id,d = $1 in id, Dfunction (d, $3) }
| direct_declarator LPAR identifier_list RPAR
{ let pl = List.map (fun x -> ([], Dsimple, x)) $3 in
let id,d = $1 in id, Dfunction (d, pl) }
| direct_declarator LPAR RPAR
{ let id,d = $1 in id, Dfunction (d, []) }
;
/* ADDED FOR WHY */
loop_annot
: LOOP_ANNOT { $1 }
| /* epsilon */ %prec no_annot { no_loop_annot }
;
pointer
: STAR { fun d -> Dpointer d }
| STAR type_qualifier_list
{ dwarning "ignored qualifiers"; fun d -> Dpointer d }
| STAR pointer { fun d -> Dpointer ($2 d) }
| STAR type_qualifier_list pointer
{ dwarning "ignored qualifiers"; fun d -> Dpointer ($3 d) }
;
type_qualifier_list
: type_qualifier { [$1] }
| type_qualifier_list type_qualifier { $1 @ [$2] }
;
parameter_type_list
: parameter_list { $1 }
/* TODO */
| parameter_list COMMA ELLIPSIS { dwarning "ignored <...>"; $1 }
;
parameter_list
: parameter_declaration { [$1] }
| parameter_list COMMA parameter_declaration { $1 @ [$3] }
;
parameter_declaration
: declaration_specifiers declarator
{ let id,d = $2 in $1, d, id }
| declaration_specifiers abstract_declarator
{ $1, $2, "" }
| declaration_specifiers
{ ($1, Dsimple, "") }
;
identifier_list
: IDENTIFIER { [$1] }
| identifier_list COMMA IDENTIFIER { $1 @ [$3] }
;
type_name
: specifier_qualifier_list { $1, Dsimple }
| specifier_qualifier_list abstract_declarator { $1, $2 }
;
abstract_declarator
: pointer { $1 Dsimple }
| direct_abstract_declarator { $1 }
| pointer direct_abstract_declarator { $1 $2 }
;
direct_abstract_declarator
: LPAR abstract_declarator RPAR
{ $2 }
| LSQUARE RSQUARE
{ Darray (Dsimple, None) }
| LSQUARE constant_expression RSQUARE
{ Darray (Dsimple, Some $2) }
| direct_abstract_declarator LSQUARE RSQUARE
{ Darray ($1, None) }
| direct_abstract_declarator LSQUARE constant_expression RSQUARE
{ Darray ($1, Some $3) }
| LPAR RPAR
{ Dfunction (Dsimple, []) }
| LPAR parameter_type_list RPAR
{ Dfunction (Dsimple, $2) }
| direct_abstract_declarator LPAR RPAR
{ Dfunction ($1, []) }
| direct_abstract_declarator LPAR parameter_type_list RPAR
{ Dfunction ($1, $3) }
;
c_initializer
: assignment_expression { Iexpr $1 }
| LBRACE c_initializer_list RBRACE { Ilist $2 }
| LBRACE c_initializer_list COMMA RBRACE { Ilist $2 }
;
c_initializer_list
: c_initializer { [$1] }
| c_initializer_list COMMA c_initializer { $1 @ [$3] }
;
statement
: labeled_statement { $1 }
| compound_statement { locate (CSblock $1) }
| expression_statement { $1 }
| selection_statement { $1 }
| iteration_statement { $1 }
| jump_statement { $1 }
| SPEC statement { locate (CSspec ($1,$2)) }
;
labeled_statement
: identifier/*ICI*/ COLON statement { locate (CSlabel ($1, $3)) }
| CASE constant_expression COLON statement { locate (CScase ($2, $4)) }
| DEFAULT COLON statement { locate (CSdefault($3)) }
;
compound_statement
: compound_statement_LBRACE RBRACE
{ Ctypes.pop (); [], [] }
| compound_statement_LBRACE statement_list RBRACE
{ Ctypes.pop (); [], $2 }
| compound_statement_LBRACE declaration_list RBRACE
{ Ctypes.pop (); $2, [] }
| compound_statement_LBRACE declaration_list statement_list RBRACE
{ Ctypes.pop (); $2, $3 }
;
compound_statement_LBRACE:
LBRACE { Ctypes.push () }
;
declaration_list
: declaration { $1 }
| declaration_list declaration { $1 @ $2 }
;
statement_list
: statement { [$1] }
| statement_list statement { $1 @ [$2] }
;
expression_statement
: SEMICOLON { locate CSnop }
| CODE_ANNOT { locate (CSannot $1) } /* ADDED FOR WHY */
| expression SEMICOLON { locate (CSexpr $1) }
;
selection_statement
: IF LPAR expression RPAR statement
{ locate (CSif ($3, $5, locate CSnop)) }
| IF LPAR expression RPAR statement ELSE statement
{ locate (CSif ($3, $5, $7)) }
| SWITCH LPAR expression RPAR statement
{ locate (CSswitch ($3, $5)) }
;
iteration_statement
: loop_annot WHILE LPAR expression RPAR statement
{ locate (CSwhile ($1, $4, $6)) }
| loop_annot DO statement WHILE LPAR expression RPAR SEMICOLON
{ locate (CSdowhile ($1, $3, $6)) }
| loop_annot FOR LPAR expression_statement expression_statement RPAR
statement
{ locate (CSfor ($1, expr_of_statement $4, expr_of_statement $5,
locate CEnop, $7)) }
| loop_annot
FOR LPAR expression_statement expression_statement expression RPAR
statement
{ locate (CSfor ($1, expr_of_statement $4, expr_of_statement $5,
$6, $8)) }
;
jump_statement
: GOTO identifier/*ICI*/ SEMICOLON { locate (CSgoto $2) }
| CONTINUE SEMICOLON { locate CScontinue }
| BREAK SEMICOLON { locate CSbreak }
| RETURN SEMICOLON { locate (CSreturn None) }
| RETURN expression SEMICOLON { locate (CSreturn (Some $2)) }
;
translation_unit
: external_declaration { $1 }
| translation_unit external_declaration { $1 @ $2 }
;
external_declaration
: function_definition { [$1] }
| declaration { $1 }
;
function_definition
: function_prototype compound_statement
{ Ctypes.pop (); (* pushed by function_prototype *)
let ty,id,pl = $1 in
let bl = locate_i 2 (CSblock $2) in
locate (Cfundef (None, ty, id, pl, bl)) }
| SPEC function_prototype compound_statement
{ Ctypes.pop (); (* pushed by function_prototype *)
let ty,id,pl = $2 in
let bl = locate_i 3 (CSblock $3) in
locate (Cfundef (Some $1, ty, id, pl, bl)) }
;
function_prototype
: declaration_specifiers declarator declaration_list
{ Ctypes.push (); function_declaration $1 $2 $3 }
| declaration_specifiers declarator
{ Ctypes.push (); function_declaration $1 $2 [] }
| declarator declaration_list
{ Ctypes.push (); function_declaration [] $1 $2 }
| declarator
{ Ctypes.push (); function_declaration [] $1 [] }
;
/* non-ANSI */
attributes_opt:
/* empty */ {}
| attributes { dwarning "ignored attributes" }
;
attributes:
attribute {}
| attributes attribute {}
;
attribute:
ATTRIBUTE LPAR LPAR attribute_list RPAR RPAR {}
;
attribute_list:
attrib {}
| attribute_list COMMA attrib {}
;
attrib:
/* empty */ {}
| identifier {}
| identifier LPAR RPAR {}
| identifier LPAR argument_expression_list RPAR {}
| CONST {}
;
|
