1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- C S T A N D -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2019, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26with Atree; use Atree; 27with Csets; use Csets; 28with Debug; use Debug; 29with Einfo; use Einfo; 30with Elists; use Elists; 31with Layout; use Layout; 32with Namet; use Namet; 33with Nlists; use Nlists; 34with Nmake; use Nmake; 35with Opt; use Opt; 36with Output; use Output; 37with Set_Targ; use Set_Targ; 38with Targparm; use Targparm; 39with Tbuild; use Tbuild; 40with Ttypes; use Ttypes; 41with Sem_Mech; use Sem_Mech; 42with Sem_Util; use Sem_Util; 43with Sinfo; use Sinfo; 44with Snames; use Snames; 45with Stand; use Stand; 46with Uintp; use Uintp; 47with Urealp; use Urealp; 48 49package body CStand is 50 51 Stloc : constant Source_Ptr := Standard_Location; 52 Staloc : constant Source_Ptr := Standard_ASCII_Location; 53 -- Standard abbreviations used throughout this package 54 55 Back_End_Float_Types : Elist_Id := No_Elist; 56 -- List used for any floating point supported by the back end. This needs 57 -- to be at the library level, because the call back procedures retrieving 58 -- this information are at that level. 59 60 ----------------------- 61 -- Local Subprograms -- 62 ----------------------- 63 64 procedure Build_Float_Type 65 (E : Entity_Id; 66 Digs : Int; 67 Rep : Float_Rep_Kind; 68 Siz : Int; 69 Align : Int); 70 -- Procedure to build standard predefined float base type. The first 71 -- parameter is the entity for the type. The second parameter is the 72 -- digits value. The third parameter indicates the representation to 73 -- be used for the type. The fourth parameter is the size in bits. 74 -- The fifth parameter is the alignment in storage units. Each type 75 -- is added to the list of predefined floating point types. 76 -- 77 -- Note that both RM_Size and Esize are set to the specified size, i.e. 78 -- we do not set the RM_Size to the precision passed by the back end. 79 -- This is consistent with the semantics of 'Size specified in the RM 80 -- because we cannot pack components of the type tighter than this size. 81 82 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Nat); 83 -- Procedure to build standard predefined signed integer subtype. The 84 -- first parameter is the entity for the subtype. The second parameter 85 -- is the size in bits. The corresponding base type is not built by 86 -- this routine but instead must be built by the caller where needed. 87 88 procedure Build_Unsigned_Integer_Type 89 (Uns : Entity_Id; 90 Siz : Nat; 91 Nam : String); 92 -- Procedure to build standard predefined unsigned integer subtype. These 93 -- subtypes are not user visible, but they are used internally. The first 94 -- parameter is the entity for the subtype. The second parameter is the 95 -- size in bits. The third parameter is an identifying name. 96 97 procedure Copy_Float_Type (To : Entity_Id; From : Entity_Id); 98 -- Build a floating point type, copying representation details from From. 99 -- This is used to create predefined floating point types based on 100 -- available types in the back end. 101 102 procedure Create_Operators; 103 -- Make entries for each of the predefined operators in Standard 104 105 procedure Create_Unconstrained_Base_Type 106 (E : Entity_Id; 107 K : Entity_Kind); 108 -- The predefined signed integer types are constrained subtypes which 109 -- must have a corresponding unconstrained base type. This type is almost 110 -- useless. The only place it has semantics is Subtypes_Statically_Match. 111 -- Consequently, we arrange for it to be identical apart from the setting 112 -- of the constrained bit. This routine takes an entity E for the Type, 113 -- copies it to estabish the base type, then resets the Ekind of the 114 -- original entity to K (the Ekind for the subtype). The Etype field of 115 -- E is set by the call (to point to the created base type entity), and 116 -- also the Is_Constrained flag of E is set. 117 -- 118 -- To understand the exact requirement for this, see RM 3.5.4(11) which 119 -- makes it clear that Integer, for example, is constrained, with the 120 -- constraint bounds matching the bounds of the (unconstrained) base 121 -- type. The point is that Integer and Integer'Base have identical 122 -- bounds, but do not statically match, since a subtype with constraints 123 -- never matches a subtype with no constraints. 124 125 function Find_Back_End_Float_Type (Name : String) return Entity_Id; 126 -- Return the first float type in Back_End_Float_Types with the given name. 127 -- Names of entities in back end types, are either type names of C 128 -- predefined types (all lower case), or mode names (upper case). 129 -- These are not generally valid identifier names. 130 131 function Identifier_For (S : Standard_Entity_Type) return Node_Id; 132 -- Returns an identifier node with the same name as the defining 133 -- identifier corresponding to the given Standard_Entity_Type value 134 135 procedure Make_Component 136 (Rec : Entity_Id; 137 Typ : Entity_Id; 138 Nam : String); 139 -- Build a record component with the given type and name, and append to 140 -- the list of components of Rec. 141 142 function Make_Formal 143 (Typ : Entity_Id; 144 Formal_Name : String) return Entity_Id; 145 -- Construct entity for subprogram formal with given name and type 146 147 function Make_Integer (V : Uint) return Node_Id; 148 -- Builds integer literal with given value 149 150 procedure Make_Name (Id : Entity_Id; Nam : String); 151 -- Make an entry in the names table for Nam, and set as Chars field of Id 152 153 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id; 154 -- Build entity for standard operator with given name and type 155 156 function New_Standard_Entity 157 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id; 158 -- Builds a new entity for Standard 159 160 function New_Standard_Entity (S : String) return Entity_Id; 161 -- Builds a new entity for Standard with Nkind = N_Defining_Identifier, 162 -- and Chars of this defining identifier set to the given string S. 163 164 procedure Print_Standard; 165 -- Print representation of package Standard if switch set 166 167 procedure Register_Float_Type 168 (Name : String; 169 Digs : Positive; 170 Float_Rep : Float_Rep_Kind; 171 Precision : Positive; 172 Size : Positive; 173 Alignment : Natural); 174 -- Registers a single back end floating-point type (from FPT_Mode_Table in 175 -- Set_Targ). This will create a predefined floating-point base type for 176 -- one of the floating point types reported by the back end, and add it 177 -- to the list of predefined float types. Name is the name of the type 178 -- as a normal format (non-null-terminated) string. Digs is the number of 179 -- digits, which is always non-zero, since non-floating-point types were 180 -- filtered out earlier. Float_Rep indicates the kind of floating-point 181 -- type, and Precision, Size and Alignment are the precision, size and 182 -- alignment in bits. 183 184 procedure Set_Integer_Bounds 185 (Id : Entity_Id; 186 Typ : Entity_Id; 187 Lb : Uint; 188 Hb : Uint); 189 -- Procedure to set bounds for integer type or subtype. Id is the entity 190 -- whose bounds and type are to be set. The Typ parameter is the Etype 191 -- value for the entity (which will be the same as Id for all predefined 192 -- integer base types. The third and fourth parameters are the bounds. 193 194 ---------------------- 195 -- Build_Float_Type -- 196 ---------------------- 197 198 procedure Build_Float_Type 199 (E : Entity_Id; 200 Digs : Int; 201 Rep : Float_Rep_Kind; 202 Siz : Int; 203 Align : Int) 204 is 205 begin 206 Set_Type_Definition (Parent (E), 207 Make_Floating_Point_Definition (Stloc, 208 Digits_Expression => Make_Integer (UI_From_Int (Digs)))); 209 210 Set_Ekind (E, E_Floating_Point_Type); 211 Set_Etype (E, E); 212 Init_Digits_Value (E, Digs); 213 Set_Float_Rep (E, Rep); 214 Init_Size (E, Siz); 215 Set_Elem_Alignment (E, Align); 216 Set_Float_Bounds (E); 217 Set_Is_Frozen (E); 218 Set_Is_Public (E); 219 Set_Size_Known_At_Compile_Time (E); 220 end Build_Float_Type; 221 222 ------------------------------ 223 -- Find_Back_End_Float_Type -- 224 ------------------------------ 225 226 function Find_Back_End_Float_Type (Name : String) return Entity_Id is 227 N : Elmt_Id; 228 229 begin 230 N := First_Elmt (Back_End_Float_Types); 231 while Present (N) and then Get_Name_String (Chars (Node (N))) /= Name 232 loop 233 Next_Elmt (N); 234 end loop; 235 236 return Node (N); 237 end Find_Back_End_Float_Type; 238 239 ------------------------------- 240 -- Build_Signed_Integer_Type -- 241 ------------------------------- 242 243 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Nat) is 244 U2Siz1 : constant Uint := 2 ** (Siz - 1); 245 Lbound : constant Uint := -U2Siz1; 246 Ubound : constant Uint := U2Siz1 - 1; 247 248 begin 249 Set_Type_Definition (Parent (E), 250 Make_Signed_Integer_Type_Definition (Stloc, 251 Low_Bound => Make_Integer (Lbound), 252 High_Bound => Make_Integer (Ubound))); 253 254 Set_Ekind (E, E_Signed_Integer_Type); 255 Set_Etype (E, E); 256 Init_Size (E, Siz); 257 Set_Elem_Alignment (E); 258 Set_Integer_Bounds (E, E, Lbound, Ubound); 259 Set_Is_Frozen (E); 260 Set_Is_Public (E); 261 Set_Is_Known_Valid (E); 262 Set_Size_Known_At_Compile_Time (E); 263 end Build_Signed_Integer_Type; 264 265 --------------------------------- 266 -- Build_Unsigned_Integer_Type -- 267 --------------------------------- 268 269 procedure Build_Unsigned_Integer_Type 270 (Uns : Entity_Id; 271 Siz : Nat; 272 Nam : String) 273 is 274 Decl : Node_Id; 275 R_Node : Node_Id; 276 277 begin 278 Decl := New_Node (N_Full_Type_Declaration, Stloc); 279 Set_Defining_Identifier (Decl, Uns); 280 Make_Name (Uns, Nam); 281 282 Set_Ekind (Uns, E_Modular_Integer_Type); 283 Set_Scope (Uns, Standard_Standard); 284 Set_Etype (Uns, Uns); 285 Init_Size (Uns, Siz); 286 Set_Elem_Alignment (Uns); 287 Set_Modulus (Uns, Uint_2 ** Siz); 288 Set_Is_Unsigned_Type (Uns); 289 Set_Size_Known_At_Compile_Time (Uns); 290 Set_Is_Known_Valid (Uns, True); 291 292 R_Node := New_Node (N_Range, Stloc); 293 Set_Low_Bound (R_Node, Make_Integer (Uint_0)); 294 Set_High_Bound (R_Node, Make_Integer (Modulus (Uns) - 1)); 295 Set_Etype (Low_Bound (R_Node), Uns); 296 Set_Etype (High_Bound (R_Node), Uns); 297 Set_Scalar_Range (Uns, R_Node); 298 end Build_Unsigned_Integer_Type; 299 300 --------------------- 301 -- Copy_Float_Type -- 302 --------------------- 303 304 procedure Copy_Float_Type (To : Entity_Id; From : Entity_Id) is 305 begin 306 Build_Float_Type 307 (To, UI_To_Int (Digits_Value (From)), Float_Rep (From), 308 UI_To_Int (Esize (From)), UI_To_Int (Alignment (From))); 309 end Copy_Float_Type; 310 311 ---------------------- 312 -- Create_Operators -- 313 ---------------------- 314 315 -- Each operator has an abbreviated signature. The formals have the names 316 -- LEFT and RIGHT. Their types are not actually used for resolution. 317 318 procedure Create_Operators is 319 Op_Node : Entity_Id; 320 321 -- The following tables define the binary and unary operators and their 322 -- corresponding result type. 323 324 Binary_Ops : constant array (S_Binary_Ops) of Name_Id := 325 326 -- There is one entry here for each binary operator, except for the 327 -- case of concatenation, where there are three entries, one for a 328 -- String result, one for Wide_String, and one for Wide_Wide_String. 329 330 (Name_Op_Add, 331 Name_Op_And, 332 Name_Op_Concat, 333 Name_Op_Concat, 334 Name_Op_Concat, 335 Name_Op_Divide, 336 Name_Op_Eq, 337 Name_Op_Expon, 338 Name_Op_Ge, 339 Name_Op_Gt, 340 Name_Op_Le, 341 Name_Op_Lt, 342 Name_Op_Mod, 343 Name_Op_Multiply, 344 Name_Op_Ne, 345 Name_Op_Or, 346 Name_Op_Rem, 347 Name_Op_Subtract, 348 Name_Op_Xor); 349 350 Bin_Op_Types : constant array (S_Binary_Ops) of Entity_Id := 351 352 -- This table has the corresponding result types. The entries are 353 -- ordered so they correspond to the Binary_Ops array above. 354 355 (Universal_Integer, -- Add 356 Standard_Boolean, -- And 357 Standard_String, -- Concat (String) 358 Standard_Wide_String, -- Concat (Wide_String) 359 Standard_Wide_Wide_String, -- Concat (Wide_Wide_String) 360 Universal_Integer, -- Divide 361 Standard_Boolean, -- Eq 362 Universal_Integer, -- Expon 363 Standard_Boolean, -- Ge 364 Standard_Boolean, -- Gt 365 Standard_Boolean, -- Le 366 Standard_Boolean, -- Lt 367 Universal_Integer, -- Mod 368 Universal_Integer, -- Multiply 369 Standard_Boolean, -- Ne 370 Standard_Boolean, -- Or 371 Universal_Integer, -- Rem 372 Universal_Integer, -- Subtract 373 Standard_Boolean); -- Xor 374 375 Unary_Ops : constant array (S_Unary_Ops) of Name_Id := 376 377 -- There is one entry here for each unary operator 378 379 (Name_Op_Abs, 380 Name_Op_Subtract, 381 Name_Op_Not, 382 Name_Op_Add); 383 384 Unary_Op_Types : constant array (S_Unary_Ops) of Entity_Id := 385 386 -- This table has the corresponding result types. The entries are 387 -- ordered so they correspond to the Unary_Ops array above. 388 389 (Universal_Integer, -- Abs 390 Universal_Integer, -- Subtract 391 Standard_Boolean, -- Not 392 Universal_Integer); -- Add 393 394 begin 395 for J in S_Binary_Ops loop 396 Op_Node := New_Operator (Binary_Ops (J), Bin_Op_Types (J)); 397 SE (J) := Op_Node; 398 Append_Entity (Make_Formal (Any_Type, "LEFT"), Op_Node); 399 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node); 400 end loop; 401 402 for J in S_Unary_Ops loop 403 Op_Node := New_Operator (Unary_Ops (J), Unary_Op_Types (J)); 404 SE (J) := Op_Node; 405 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node); 406 end loop; 407 408 -- For concatenation, we create a separate operator for each 409 -- array type. This simplifies the resolution of the component- 410 -- component concatenation operation. In Standard, we set the types 411 -- of the formals for string, wide [wide]_string, concatenations. 412 413 Set_Etype (First_Entity (Standard_Op_Concat), Standard_String); 414 Set_Etype (Last_Entity (Standard_Op_Concat), Standard_String); 415 416 Set_Etype (First_Entity (Standard_Op_Concatw), Standard_Wide_String); 417 Set_Etype (Last_Entity (Standard_Op_Concatw), Standard_Wide_String); 418 419 Set_Etype (First_Entity (Standard_Op_Concatww), 420 Standard_Wide_Wide_String); 421 422 Set_Etype (Last_Entity (Standard_Op_Concatww), 423 Standard_Wide_Wide_String); 424 end Create_Operators; 425 426 --------------------- 427 -- Create_Standard -- 428 --------------------- 429 430 -- The tree for the package Standard is prefixed to all compilations. 431 -- Several entities required by semantic analysis are denoted by global 432 -- variables that are initialized to point to the corresponding occurrences 433 -- in Standard. The visible entities of Standard are created here. Special 434 -- entities maybe created here as well or may be created from the semantics 435 -- module. By not adding them to the Decls list of Standard they will not 436 -- be visible to Ada programs. 437 438 procedure Create_Standard is 439 Decl_S : constant List_Id := New_List; 440 -- List of declarations in Standard 441 442 Decl_A : constant List_Id := New_List; 443 -- List of declarations in ASCII 444 445 Decl : Node_Id; 446 Pspec : Node_Id; 447 Tdef_Node : Node_Id; 448 Ident_Node : Node_Id; 449 Ccode : Char_Code; 450 E_Id : Entity_Id; 451 R_Node : Node_Id; 452 B_Node : Node_Id; 453 454 procedure Build_Exception (S : Standard_Entity_Type); 455 -- Procedure to declare given entity as an exception 456 457 procedure Create_Back_End_Float_Types; 458 -- Initialize the Back_End_Float_Types list by having the back end 459 -- enumerate all available types and building type entities for them. 460 461 procedure Create_Float_Types; 462 -- Creates entities for all predefined floating point types, and 463 -- adds these to the Predefined_Float_Types list in package Standard. 464 465 procedure Make_Dummy_Index (E : Entity_Id); 466 -- Called to provide a dummy index field value for Any_Array/Any_String 467 468 procedure Pack_String_Type (String_Type : Entity_Id); 469 -- Generate proper tree for pragma Pack that applies to given type, and 470 -- mark type as having the pragma. 471 472 --------------------- 473 -- Build_Exception -- 474 --------------------- 475 476 procedure Build_Exception (S : Standard_Entity_Type) is 477 begin 478 Set_Ekind (Standard_Entity (S), E_Exception); 479 Set_Etype (Standard_Entity (S), Standard_Exception_Type); 480 Set_Is_Public (Standard_Entity (S), True); 481 482 Decl := 483 Make_Exception_Declaration (Stloc, 484 Defining_Identifier => Standard_Entity (S)); 485 Append (Decl, Decl_S); 486 end Build_Exception; 487 488 --------------------------------- 489 -- Create_Back_End_Float_Types -- 490 --------------------------------- 491 492 procedure Create_Back_End_Float_Types is 493 begin 494 for J in 1 .. Num_FPT_Modes loop 495 declare 496 E : FPT_Mode_Entry renames FPT_Mode_Table (J); 497 begin 498 Register_Float_Type 499 (E.NAME.all, E.DIGS, E.FLOAT_REP, E.PRECISION, E.SIZE, 500 E.ALIGNMENT); 501 end; 502 end loop; 503 end Create_Back_End_Float_Types; 504 505 ------------------------ 506 -- Create_Float_Types -- 507 ------------------------ 508 509 procedure Create_Float_Types is 510 begin 511 -- Create type definition nodes for predefined float types 512 513 Copy_Float_Type 514 (Standard_Short_Float, 515 Find_Back_End_Float_Type (C_Type_For (S_Short_Float))); 516 Set_Is_Implementation_Defined (Standard_Short_Float); 517 518 Copy_Float_Type (Standard_Float, Standard_Short_Float); 519 520 Copy_Float_Type 521 (Standard_Long_Float, 522 Find_Back_End_Float_Type (C_Type_For (S_Long_Float))); 523 524 Copy_Float_Type 525 (Standard_Long_Long_Float, 526 Find_Back_End_Float_Type (C_Type_For (S_Long_Long_Float))); 527 Set_Is_Implementation_Defined (Standard_Long_Long_Float); 528 529 Predefined_Float_Types := New_Elmt_List; 530 531 Append_Elmt (Standard_Short_Float, Predefined_Float_Types); 532 Append_Elmt (Standard_Float, Predefined_Float_Types); 533 Append_Elmt (Standard_Long_Float, Predefined_Float_Types); 534 Append_Elmt (Standard_Long_Long_Float, Predefined_Float_Types); 535 536 -- Any other back end types are appended at the end of the list of 537 -- predefined float types, and will only be selected if the none of 538 -- the types in Standard is suitable, or if a specific named type is 539 -- requested through a pragma Import. 540 541 while not Is_Empty_Elmt_List (Back_End_Float_Types) loop 542 declare 543 E : constant Elmt_Id := First_Elmt (Back_End_Float_Types); 544 begin 545 Append_Elmt (Node (E), To => Predefined_Float_Types); 546 Remove_Elmt (Back_End_Float_Types, E); 547 end; 548 end loop; 549 end Create_Float_Types; 550 551 ---------------------- 552 -- Make_Dummy_Index -- 553 ---------------------- 554 555 procedure Make_Dummy_Index (E : Entity_Id) is 556 Index : Node_Id; 557 Dummy : List_Id; 558 559 begin 560 Index := 561 Make_Range (Sloc (E), 562 Low_Bound => Make_Integer (Uint_0), 563 High_Bound => Make_Integer (Uint_2 ** Standard_Integer_Size)); 564 Set_Etype (Index, Standard_Integer); 565 Set_First_Index (E, Index); 566 567 -- Make sure Index is a list as required, so Next_Index is Empty 568 569 Dummy := New_List (Index); 570 end Make_Dummy_Index; 571 572 ---------------------- 573 -- Pack_String_Type -- 574 ---------------------- 575 576 procedure Pack_String_Type (String_Type : Entity_Id) is 577 Prag : constant Node_Id := 578 Make_Pragma (Stloc, 579 Chars => Name_Pack, 580 Pragma_Argument_Associations => 581 New_List ( 582 Make_Pragma_Argument_Association (Stloc, 583 Expression => New_Occurrence_Of (String_Type, Stloc)))); 584 begin 585 Append (Prag, Decl_S); 586 Record_Rep_Item (String_Type, Prag); 587 Set_Has_Pragma_Pack (String_Type, True); 588 end Pack_String_Type; 589 590 -- Start of processing for Create_Standard 591 592 begin 593 -- First step is to create defining identifiers for each entity 594 595 for S in Standard_Entity_Type loop 596 declare 597 S_Name : constant String := Standard_Entity_Type'Image (S); 598 -- Name of entity (note we skip S_ at the start) 599 600 Ident_Node : Node_Id; 601 -- Defining identifier node 602 603 begin 604 Ident_Node := New_Standard_Entity; 605 Make_Name (Ident_Node, S_Name (3 .. S_Name'Length)); 606 Standard_Entity (S) := Ident_Node; 607 end; 608 end loop; 609 610 -- Create package declaration node for package Standard 611 612 Standard_Package_Node := New_Node (N_Package_Declaration, Stloc); 613 614 Pspec := New_Node (N_Package_Specification, Stloc); 615 Set_Specification (Standard_Package_Node, Pspec); 616 617 Set_Defining_Unit_Name (Pspec, Standard_Standard); 618 Set_Visible_Declarations (Pspec, Decl_S); 619 620 Set_Ekind (Standard_Standard, E_Package); 621 Set_Is_Pure (Standard_Standard); 622 Set_Is_Compilation_Unit (Standard_Standard); 623 624 -- Create type/subtype declaration nodes for standard types 625 626 for S in S_Types loop 627 628 -- Subtype declaration case 629 630 if S = S_Natural or else S = S_Positive then 631 Decl := New_Node (N_Subtype_Declaration, Stloc); 632 Set_Subtype_Indication (Decl, 633 New_Occurrence_Of (Standard_Integer, Stloc)); 634 635 -- Full type declaration case 636 637 else 638 Decl := New_Node (N_Full_Type_Declaration, Stloc); 639 end if; 640 641 Set_Is_Frozen (Standard_Entity (S)); 642 Set_Is_Public (Standard_Entity (S)); 643 Set_Defining_Identifier (Decl, Standard_Entity (S)); 644 Append (Decl, Decl_S); 645 end loop; 646 647 Create_Back_End_Float_Types; 648 649 -- Create type definition node for type Boolean. The Size is set to 650 -- 1 as required by Ada 95 and current ARG interpretations for Ada/83. 651 652 -- Note: Object_Size of Boolean is 8. This means that we do NOT in 653 -- general know that Boolean variables have valid values, so we do 654 -- not set the Is_Known_Valid flag. 655 656 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc); 657 Set_Literals (Tdef_Node, New_List); 658 Append (Standard_False, Literals (Tdef_Node)); 659 Append (Standard_True, Literals (Tdef_Node)); 660 Set_Type_Definition (Parent (Standard_Boolean), Tdef_Node); 661 662 Set_Ekind (Standard_Boolean, E_Enumeration_Type); 663 Set_First_Literal (Standard_Boolean, Standard_False); 664 Set_Etype (Standard_Boolean, Standard_Boolean); 665 Init_Esize (Standard_Boolean, Standard_Character_Size); 666 Init_RM_Size (Standard_Boolean, 1); 667 Set_Elem_Alignment (Standard_Boolean); 668 669 Set_Is_Unsigned_Type (Standard_Boolean); 670 Set_Size_Known_At_Compile_Time (Standard_Boolean); 671 Set_Has_Pragma_Ordered (Standard_Boolean); 672 673 Set_Ekind (Standard_True, E_Enumeration_Literal); 674 Set_Etype (Standard_True, Standard_Boolean); 675 Set_Enumeration_Pos (Standard_True, Uint_1); 676 Set_Enumeration_Rep (Standard_True, Uint_1); 677 Set_Is_Known_Valid (Standard_True, True); 678 679 Set_Ekind (Standard_False, E_Enumeration_Literal); 680 Set_Etype (Standard_False, Standard_Boolean); 681 Set_Enumeration_Pos (Standard_False, Uint_0); 682 Set_Enumeration_Rep (Standard_False, Uint_0); 683 Set_Is_Known_Valid (Standard_False, True); 684 685 -- For the bounds of Boolean, we create a range node corresponding to 686 687 -- range False .. True 688 689 -- where the occurrences of the literals must point to the 690 -- corresponding definition. 691 692 R_Node := New_Node (N_Range, Stloc); 693 B_Node := New_Node (N_Identifier, Stloc); 694 Set_Chars (B_Node, Chars (Standard_False)); 695 Set_Entity (B_Node, Standard_False); 696 Set_Etype (B_Node, Standard_Boolean); 697 Set_Is_Static_Expression (B_Node); 698 Set_Low_Bound (R_Node, B_Node); 699 700 B_Node := New_Node (N_Identifier, Stloc); 701 Set_Chars (B_Node, Chars (Standard_True)); 702 Set_Entity (B_Node, Standard_True); 703 Set_Etype (B_Node, Standard_Boolean); 704 Set_Is_Static_Expression (B_Node); 705 Set_High_Bound (R_Node, B_Node); 706 707 Set_Scalar_Range (Standard_Boolean, R_Node); 708 Set_Etype (R_Node, Standard_Boolean); 709 Set_Parent (R_Node, Standard_Boolean); 710 711 -- Record entity identifiers for boolean literals in the 712 -- Boolean_Literals array, for easy reference during expansion. 713 714 Boolean_Literals := (False => Standard_False, True => Standard_True); 715 716 -- Create type definition nodes for predefined integer types 717 718 Build_Signed_Integer_Type 719 (Standard_Short_Short_Integer, Standard_Short_Short_Integer_Size); 720 721 Build_Signed_Integer_Type 722 (Standard_Short_Integer, Standard_Short_Integer_Size); 723 Set_Is_Implementation_Defined (Standard_Short_Integer); 724 725 Build_Signed_Integer_Type 726 (Standard_Integer, Standard_Integer_Size); 727 728 Build_Signed_Integer_Type 729 (Standard_Long_Integer, Standard_Long_Integer_Size); 730 731 Build_Signed_Integer_Type 732 (Standard_Long_Long_Integer, Standard_Long_Long_Integer_Size); 733 Set_Is_Implementation_Defined (Standard_Long_Long_Integer); 734 735 Create_Unconstrained_Base_Type 736 (Standard_Short_Short_Integer, E_Signed_Integer_Subtype); 737 Set_Is_Implementation_Defined (Standard_Short_Short_Integer); 738 739 Create_Unconstrained_Base_Type 740 (Standard_Short_Integer, E_Signed_Integer_Subtype); 741 742 Create_Unconstrained_Base_Type 743 (Standard_Integer, E_Signed_Integer_Subtype); 744 745 Create_Unconstrained_Base_Type 746 (Standard_Long_Integer, E_Signed_Integer_Subtype); 747 748 Create_Unconstrained_Base_Type 749 (Standard_Long_Long_Integer, E_Signed_Integer_Subtype); 750 Set_Is_Implementation_Defined (Standard_Short_Short_Integer); 751 752 Create_Float_Types; 753 754 -- Create type definition node for type Character. Note that we do not 755 -- set the Literals field, since type Character is handled with special 756 -- routine that do not need a literal list. 757 758 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc); 759 Set_Type_Definition (Parent (Standard_Character), Tdef_Node); 760 761 Set_Ekind (Standard_Character, E_Enumeration_Type); 762 Set_Etype (Standard_Character, Standard_Character); 763 Init_Esize (Standard_Character, Standard_Character_Size); 764 Init_RM_Size (Standard_Character, 8); 765 Set_Elem_Alignment (Standard_Character); 766 767 Set_Has_Pragma_Ordered (Standard_Character); 768 Set_Is_Unsigned_Type (Standard_Character); 769 Set_Is_Character_Type (Standard_Character); 770 Set_Is_Known_Valid (Standard_Character); 771 Set_Size_Known_At_Compile_Time (Standard_Character); 772 773 -- Create the bounds for type Character 774 775 R_Node := New_Node (N_Range, Stloc); 776 777 -- Low bound for type Character (Standard.Nul) 778 779 B_Node := New_Node (N_Character_Literal, Stloc); 780 Set_Is_Static_Expression (B_Node); 781 Set_Chars (B_Node, No_Name); 782 Set_Char_Literal_Value (B_Node, Uint_0); 783 Set_Entity (B_Node, Empty); 784 Set_Etype (B_Node, Standard_Character); 785 Set_Low_Bound (R_Node, B_Node); 786 787 -- High bound for type Character 788 789 B_Node := New_Node (N_Character_Literal, Stloc); 790 Set_Is_Static_Expression (B_Node); 791 Set_Chars (B_Node, No_Name); 792 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FF#)); 793 Set_Entity (B_Node, Empty); 794 Set_Etype (B_Node, Standard_Character); 795 Set_High_Bound (R_Node, B_Node); 796 797 Set_Scalar_Range (Standard_Character, R_Node); 798 Set_Etype (R_Node, Standard_Character); 799 Set_Parent (R_Node, Standard_Character); 800 801 -- Create type definition for type Wide_Character. Note that we do not 802 -- set the Literals field, since type Wide_Character is handled with 803 -- special routines that do not need a literal list. 804 805 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc); 806 Set_Type_Definition (Parent (Standard_Wide_Character), Tdef_Node); 807 808 Set_Ekind (Standard_Wide_Character, E_Enumeration_Type); 809 Set_Etype (Standard_Wide_Character, Standard_Wide_Character); 810 Init_Size (Standard_Wide_Character, Standard_Wide_Character_Size); 811 812 Set_Elem_Alignment (Standard_Wide_Character); 813 Set_Has_Pragma_Ordered (Standard_Wide_Character); 814 Set_Is_Unsigned_Type (Standard_Wide_Character); 815 Set_Is_Character_Type (Standard_Wide_Character); 816 Set_Is_Known_Valid (Standard_Wide_Character); 817 Set_Size_Known_At_Compile_Time (Standard_Wide_Character); 818 819 -- Create the bounds for type Wide_Character 820 821 R_Node := New_Node (N_Range, Stloc); 822 823 -- Low bound for type Wide_Character 824 825 B_Node := New_Node (N_Character_Literal, Stloc); 826 Set_Is_Static_Expression (B_Node); 827 Set_Chars (B_Node, No_Name); -- ??? 828 Set_Char_Literal_Value (B_Node, Uint_0); 829 Set_Entity (B_Node, Empty); 830 Set_Etype (B_Node, Standard_Wide_Character); 831 Set_Low_Bound (R_Node, B_Node); 832 833 -- High bound for type Wide_Character 834 835 B_Node := New_Node (N_Character_Literal, Stloc); 836 Set_Is_Static_Expression (B_Node); 837 Set_Chars (B_Node, No_Name); -- ??? 838 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FFFF#)); 839 Set_Entity (B_Node, Empty); 840 Set_Etype (B_Node, Standard_Wide_Character); 841 Set_High_Bound (R_Node, B_Node); 842 843 Set_Scalar_Range (Standard_Wide_Character, R_Node); 844 Set_Etype (R_Node, Standard_Wide_Character); 845 Set_Parent (R_Node, Standard_Wide_Character); 846 847 -- Create type definition for type Wide_Wide_Character. Note that we 848 -- do not set the Literals field, since type Wide_Wide_Character is 849 -- handled with special routines that do not need a literal list. 850 851 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc); 852 Set_Type_Definition (Parent (Standard_Wide_Wide_Character), Tdef_Node); 853 854 Set_Ekind (Standard_Wide_Wide_Character, E_Enumeration_Type); 855 Set_Etype (Standard_Wide_Wide_Character, 856 Standard_Wide_Wide_Character); 857 Init_Size (Standard_Wide_Wide_Character, 858 Standard_Wide_Wide_Character_Size); 859 860 Set_Elem_Alignment (Standard_Wide_Wide_Character); 861 Set_Has_Pragma_Ordered (Standard_Wide_Wide_Character); 862 Set_Is_Unsigned_Type (Standard_Wide_Wide_Character); 863 Set_Is_Character_Type (Standard_Wide_Wide_Character); 864 Set_Is_Known_Valid (Standard_Wide_Wide_Character); 865 Set_Size_Known_At_Compile_Time (Standard_Wide_Wide_Character); 866 Set_Is_Ada_2005_Only (Standard_Wide_Wide_Character); 867 868 -- Create the bounds for type Wide_Wide_Character 869 870 R_Node := New_Node (N_Range, Stloc); 871 872 -- Low bound for type Wide_Wide_Character 873 874 B_Node := New_Node (N_Character_Literal, Stloc); 875 Set_Is_Static_Expression (B_Node); 876 Set_Chars (B_Node, No_Name); -- ??? 877 Set_Char_Literal_Value (B_Node, Uint_0); 878 Set_Entity (B_Node, Empty); 879 Set_Etype (B_Node, Standard_Wide_Wide_Character); 880 Set_Low_Bound (R_Node, B_Node); 881 882 -- High bound for type Wide_Wide_Character 883 884 B_Node := New_Node (N_Character_Literal, Stloc); 885 Set_Is_Static_Expression (B_Node); 886 Set_Chars (B_Node, No_Name); -- ??? 887 Set_Char_Literal_Value (B_Node, UI_From_Int (16#7FFF_FFFF#)); 888 Set_Entity (B_Node, Empty); 889 Set_Etype (B_Node, Standard_Wide_Wide_Character); 890 Set_High_Bound (R_Node, B_Node); 891 892 Set_Scalar_Range (Standard_Wide_Wide_Character, R_Node); 893 Set_Etype (R_Node, Standard_Wide_Wide_Character); 894 Set_Parent (R_Node, Standard_Wide_Wide_Character); 895 896 -- Create type definition node for type String 897 898 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc); 899 900 declare 901 CompDef_Node : Node_Id; 902 begin 903 CompDef_Node := New_Node (N_Component_Definition, Stloc); 904 Set_Aliased_Present (CompDef_Node, False); 905 Set_Access_Definition (CompDef_Node, Empty); 906 Set_Subtype_Indication (CompDef_Node, Identifier_For (S_Character)); 907 Set_Component_Definition (Tdef_Node, CompDef_Node); 908 end; 909 910 Set_Subtype_Marks (Tdef_Node, New_List); 911 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node)); 912 Set_Type_Definition (Parent (Standard_String), Tdef_Node); 913 914 Set_Ekind (Standard_String, E_Array_Type); 915 Set_Etype (Standard_String, Standard_String); 916 Set_Component_Type (Standard_String, Standard_Character); 917 Set_Component_Size (Standard_String, Uint_8); 918 Init_Size_Align (Standard_String); 919 Set_Alignment (Standard_String, Uint_1); 920 Pack_String_Type (Standard_String); 921 922 -- On targets where a storage unit is larger than a byte (such as AAMP), 923 -- pragma Pack has a real effect on the representation of type String, 924 -- and the type must be marked as having a nonstandard representation. 925 926 if System_Storage_Unit > Uint_8 then 927 Set_Has_Non_Standard_Rep (Standard_String); 928 Set_Has_Pragma_Pack (Standard_String); 929 end if; 930 931 -- Set index type of String 932 933 E_Id := 934 First (Subtype_Marks (Type_Definition (Parent (Standard_String)))); 935 Set_First_Index (Standard_String, E_Id); 936 Set_Entity (E_Id, Standard_Positive); 937 Set_Etype (E_Id, Standard_Positive); 938 939 -- Create type definition node for type Wide_String 940 941 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc); 942 943 declare 944 CompDef_Node : Node_Id; 945 begin 946 CompDef_Node := New_Node (N_Component_Definition, Stloc); 947 Set_Aliased_Present (CompDef_Node, False); 948 Set_Access_Definition (CompDef_Node, Empty); 949 Set_Subtype_Indication (CompDef_Node, 950 Identifier_For (S_Wide_Character)); 951 Set_Component_Definition (Tdef_Node, CompDef_Node); 952 end; 953 954 Set_Subtype_Marks (Tdef_Node, New_List); 955 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node)); 956 Set_Type_Definition (Parent (Standard_Wide_String), Tdef_Node); 957 958 Set_Ekind (Standard_Wide_String, E_Array_Type); 959 Set_Etype (Standard_Wide_String, Standard_Wide_String); 960 Set_Component_Type (Standard_Wide_String, Standard_Wide_Character); 961 Set_Component_Size (Standard_Wide_String, Uint_16); 962 Init_Size_Align (Standard_Wide_String); 963 Pack_String_Type (Standard_Wide_String); 964 965 -- Set index type of Wide_String 966 967 E_Id := 968 First 969 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_String)))); 970 Set_First_Index (Standard_Wide_String, E_Id); 971 Set_Entity (E_Id, Standard_Positive); 972 Set_Etype (E_Id, Standard_Positive); 973 974 -- Create type definition node for type Wide_Wide_String 975 976 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc); 977 978 declare 979 CompDef_Node : Node_Id; 980 begin 981 CompDef_Node := New_Node (N_Component_Definition, Stloc); 982 Set_Aliased_Present (CompDef_Node, False); 983 Set_Access_Definition (CompDef_Node, Empty); 984 Set_Subtype_Indication (CompDef_Node, 985 Identifier_For (S_Wide_Wide_Character)); 986 Set_Component_Definition (Tdef_Node, CompDef_Node); 987 end; 988 989 Set_Subtype_Marks (Tdef_Node, New_List); 990 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node)); 991 Set_Type_Definition (Parent (Standard_Wide_Wide_String), Tdef_Node); 992 993 Set_Ekind (Standard_Wide_Wide_String, E_Array_Type); 994 Set_Etype (Standard_Wide_Wide_String, 995 Standard_Wide_Wide_String); 996 Set_Component_Type (Standard_Wide_Wide_String, 997 Standard_Wide_Wide_Character); 998 Set_Component_Size (Standard_Wide_Wide_String, Uint_32); 999 Init_Size_Align (Standard_Wide_Wide_String); 1000 Set_Is_Ada_2005_Only (Standard_Wide_Wide_String); 1001 Pack_String_Type (Standard_Wide_Wide_String); 1002 1003 -- Set index type of Wide_Wide_String 1004 1005 E_Id := 1006 First 1007 (Subtype_Marks 1008 (Type_Definition (Parent (Standard_Wide_Wide_String)))); 1009 Set_First_Index (Standard_Wide_Wide_String, E_Id); 1010 Set_Entity (E_Id, Standard_Positive); 1011 Set_Etype (E_Id, Standard_Positive); 1012 1013 -- Setup entity for Natural 1014 1015 Set_Ekind (Standard_Natural, E_Signed_Integer_Subtype); 1016 Set_Etype (Standard_Natural, Base_Type (Standard_Integer)); 1017 Init_Esize (Standard_Natural, Standard_Integer_Size); 1018 Init_RM_Size (Standard_Natural, Standard_Integer_Size - 1); 1019 Set_Elem_Alignment (Standard_Natural); 1020 Set_Size_Known_At_Compile_Time 1021 (Standard_Natural); 1022 Set_Integer_Bounds (Standard_Natural, 1023 Typ => Base_Type (Standard_Integer), 1024 Lb => Uint_0, 1025 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer)))); 1026 Set_Is_Constrained (Standard_Natural); 1027 1028 -- Setup entity for Positive 1029 1030 Set_Ekind (Standard_Positive, E_Signed_Integer_Subtype); 1031 Set_Etype (Standard_Positive, Base_Type (Standard_Integer)); 1032 Init_Esize (Standard_Positive, Standard_Integer_Size); 1033 Init_RM_Size (Standard_Positive, Standard_Integer_Size - 1); 1034 Set_Elem_Alignment (Standard_Positive); 1035 1036 Set_Size_Known_At_Compile_Time (Standard_Positive); 1037 1038 Set_Integer_Bounds (Standard_Positive, 1039 Typ => Base_Type (Standard_Integer), 1040 Lb => Uint_1, 1041 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer)))); 1042 Set_Is_Constrained (Standard_Positive); 1043 1044 -- Create declaration for package ASCII 1045 1046 Decl := New_Node (N_Package_Declaration, Stloc); 1047 Append (Decl, Decl_S); 1048 1049 Pspec := New_Node (N_Package_Specification, Stloc); 1050 Set_Specification (Decl, Pspec); 1051 1052 Set_Defining_Unit_Name (Pspec, Standard_Entity (S_ASCII)); 1053 Set_Ekind (Standard_Entity (S_ASCII), E_Package); 1054 Set_Visible_Declarations (Pspec, Decl_A); 1055 1056 -- Create control character definitions in package ASCII. Note that 1057 -- the character literal entries created here correspond to literal 1058 -- values that are impossible in the source, but can be represented 1059 -- internally with no difficulties. 1060 1061 Ccode := 16#00#; 1062 1063 for S in S_ASCII_Names loop 1064 Decl := New_Node (N_Object_Declaration, Staloc); 1065 Set_Constant_Present (Decl, True); 1066 1067 declare 1068 A_Char : constant Entity_Id := Standard_Entity (S); 1069 Expr_Decl : Node_Id; 1070 1071 begin 1072 Set_Sloc (A_Char, Staloc); 1073 Set_Ekind (A_Char, E_Constant); 1074 Set_Never_Set_In_Source (A_Char, True); 1075 Set_Is_True_Constant (A_Char, True); 1076 Set_Etype (A_Char, Standard_Character); 1077 Set_Scope (A_Char, Standard_Entity (S_ASCII)); 1078 Set_Is_Immediately_Visible (A_Char, False); 1079 Set_Is_Public (A_Char, True); 1080 Set_Is_Known_Valid (A_Char, True); 1081 1082 Append_Entity (A_Char, Standard_Entity (S_ASCII)); 1083 Set_Defining_Identifier (Decl, A_Char); 1084 1085 Set_Object_Definition (Decl, Identifier_For (S_Character)); 1086 Expr_Decl := New_Node (N_Character_Literal, Staloc); 1087 Set_Expression (Decl, Expr_Decl); 1088 1089 Set_Is_Static_Expression (Expr_Decl); 1090 Set_Chars (Expr_Decl, No_Name); 1091 Set_Etype (Expr_Decl, Standard_Character); 1092 Set_Char_Literal_Value (Expr_Decl, UI_From_Int (Int (Ccode))); 1093 end; 1094 1095 Append (Decl, Decl_A); 1096 1097 -- Increment character code, dealing with non-contiguities 1098 1099 Ccode := Ccode + 1; 1100 1101 if Ccode = 16#20# then 1102 Ccode := 16#21#; 1103 elsif Ccode = 16#27# then 1104 Ccode := 16#3A#; 1105 elsif Ccode = 16#3C# then 1106 Ccode := 16#3F#; 1107 elsif Ccode = 16#41# then 1108 Ccode := 16#5B#; 1109 end if; 1110 end loop; 1111 1112 -- Create semantic phase entities 1113 1114 Standard_Void_Type := New_Standard_Entity; 1115 Set_Ekind (Standard_Void_Type, E_Void); 1116 Set_Etype (Standard_Void_Type, Standard_Void_Type); 1117 Set_Scope (Standard_Void_Type, Standard_Standard); 1118 Make_Name (Standard_Void_Type, "_void_type"); 1119 1120 -- The type field of packages is set to void 1121 1122 Set_Etype (Standard_Standard, Standard_Void_Type); 1123 Set_Etype (Standard_ASCII, Standard_Void_Type); 1124 1125 -- Standard_A_String is actually used in generated code, so it has a 1126 -- type name that is reasonable, but does not overlap any Ada name. 1127 1128 Standard_A_String := New_Standard_Entity; 1129 Set_Ekind (Standard_A_String, E_Access_Type); 1130 Set_Scope (Standard_A_String, Standard_Standard); 1131 Set_Etype (Standard_A_String, Standard_A_String); 1132 1133 if Debug_Flag_6 then 1134 Init_Size (Standard_A_String, System_Address_Size); 1135 else 1136 Init_Size (Standard_A_String, System_Address_Size * 2); 1137 end if; 1138 1139 Init_Alignment (Standard_A_String); 1140 1141 Set_Directly_Designated_Type 1142 (Standard_A_String, Standard_String); 1143 Make_Name (Standard_A_String, "access_string"); 1144 1145 Standard_A_Char := New_Standard_Entity; 1146 Set_Ekind (Standard_A_Char, E_Access_Type); 1147 Set_Scope (Standard_A_Char, Standard_Standard); 1148 Set_Etype (Standard_A_Char, Standard_A_String); 1149 Init_Size (Standard_A_Char, System_Address_Size); 1150 Set_Elem_Alignment (Standard_A_Char); 1151 1152 Set_Directly_Designated_Type (Standard_A_Char, Standard_Character); 1153 Make_Name (Standard_A_Char, "access_character"); 1154 1155 -- Standard_Debug_Renaming_Type is used for the special objects created 1156 -- to encode the names occurring in renaming declarations for use by the 1157 -- debugger (see exp_dbug.adb). The type is a zero-sized subtype of 1158 -- Standard.Integer. 1159 1160 Standard_Debug_Renaming_Type := New_Standard_Entity; 1161 1162 Set_Ekind (Standard_Debug_Renaming_Type, E_Signed_Integer_Subtype); 1163 Set_Scope (Standard_Debug_Renaming_Type, Standard_Standard); 1164 Set_Etype (Standard_Debug_Renaming_Type, Base_Type (Standard_Integer)); 1165 Init_Esize (Standard_Debug_Renaming_Type, 0); 1166 Init_RM_Size (Standard_Debug_Renaming_Type, 0); 1167 Set_Size_Known_At_Compile_Time (Standard_Debug_Renaming_Type); 1168 Set_Integer_Bounds (Standard_Debug_Renaming_Type, 1169 Typ => Base_Type (Standard_Debug_Renaming_Type), 1170 Lb => Uint_1, 1171 Hb => Uint_0); 1172 Set_Is_Constrained (Standard_Debug_Renaming_Type); 1173 Set_Has_Size_Clause (Standard_Debug_Renaming_Type); 1174 1175 Make_Name (Standard_Debug_Renaming_Type, "_renaming_type"); 1176 1177 -- Note on type names. The type names for the following special types 1178 -- are constructed so that they will look reasonable should they ever 1179 -- appear in error messages etc, although in practice the use of the 1180 -- special insertion character } for types results in special handling 1181 -- of these type names in any case. The blanks in these names would 1182 -- trouble in Gigi, but that's OK here, since none of these types 1183 -- should ever get through to Gigi. Attributes of these types are 1184 -- filled out to minimize problems with cascaded errors (for example, 1185 -- Any_Integer is given reasonable and consistent type and size values) 1186 1187 Any_Type := New_Standard_Entity ("any type"); 1188 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1189 Set_Defining_Identifier (Decl, Any_Type); 1190 Set_Scope (Any_Type, Standard_Standard); 1191 Build_Signed_Integer_Type (Any_Type, Standard_Integer_Size); 1192 1193 Any_Id := New_Standard_Entity ("any id"); 1194 Set_Ekind (Any_Id, E_Variable); 1195 Set_Scope (Any_Id, Standard_Standard); 1196 Set_Etype (Any_Id, Any_Type); 1197 Init_Esize (Any_Id); 1198 Init_Alignment (Any_Id); 1199 1200 Any_Access := New_Standard_Entity ("an access type"); 1201 Set_Ekind (Any_Access, E_Access_Type); 1202 Set_Scope (Any_Access, Standard_Standard); 1203 Set_Etype (Any_Access, Any_Access); 1204 Init_Size (Any_Access, System_Address_Size); 1205 Set_Elem_Alignment (Any_Access); 1206 Set_Directly_Designated_Type 1207 (Any_Access, Any_Type); 1208 1209 Any_Character := New_Standard_Entity ("a character type"); 1210 Set_Ekind (Any_Character, E_Enumeration_Type); 1211 Set_Scope (Any_Character, Standard_Standard); 1212 Set_Etype (Any_Character, Any_Character); 1213 Set_Is_Unsigned_Type (Any_Character); 1214 Set_Is_Character_Type (Any_Character); 1215 Init_Esize (Any_Character, Standard_Character_Size); 1216 Init_RM_Size (Any_Character, 8); 1217 Set_Elem_Alignment (Any_Character); 1218 Set_Scalar_Range (Any_Character, Scalar_Range (Standard_Character)); 1219 1220 Any_Array := New_Standard_Entity ("an array type"); 1221 Set_Ekind (Any_Array, E_Array_Type); 1222 Set_Scope (Any_Array, Standard_Standard); 1223 Set_Etype (Any_Array, Any_Array); 1224 Set_Component_Type (Any_Array, Any_Character); 1225 Init_Size_Align (Any_Array); 1226 Make_Dummy_Index (Any_Array); 1227 1228 Any_Boolean := New_Standard_Entity ("a boolean type"); 1229 Set_Ekind (Any_Boolean, E_Enumeration_Type); 1230 Set_Scope (Any_Boolean, Standard_Standard); 1231 Set_Etype (Any_Boolean, Standard_Boolean); 1232 Init_Esize (Any_Boolean, Standard_Character_Size); 1233 Init_RM_Size (Any_Boolean, 1); 1234 Set_Elem_Alignment (Any_Boolean); 1235 Set_Is_Unsigned_Type (Any_Boolean); 1236 Set_Scalar_Range (Any_Boolean, Scalar_Range (Standard_Boolean)); 1237 1238 Any_Composite := New_Standard_Entity ("a composite type"); 1239 Set_Ekind (Any_Composite, E_Array_Type); 1240 Set_Scope (Any_Composite, Standard_Standard); 1241 Set_Etype (Any_Composite, Any_Composite); 1242 Set_Component_Size (Any_Composite, Uint_0); 1243 Set_Component_Type (Any_Composite, Standard_Integer); 1244 Init_Size_Align (Any_Composite); 1245 1246 Any_Discrete := New_Standard_Entity ("a discrete type"); 1247 Set_Ekind (Any_Discrete, E_Signed_Integer_Type); 1248 Set_Scope (Any_Discrete, Standard_Standard); 1249 Set_Etype (Any_Discrete, Any_Discrete); 1250 Init_Size (Any_Discrete, Standard_Integer_Size); 1251 Set_Elem_Alignment (Any_Discrete); 1252 1253 Any_Fixed := New_Standard_Entity ("a fixed-point type"); 1254 Set_Ekind (Any_Fixed, E_Ordinary_Fixed_Point_Type); 1255 Set_Scope (Any_Fixed, Standard_Standard); 1256 Set_Etype (Any_Fixed, Any_Fixed); 1257 Init_Size (Any_Fixed, Standard_Integer_Size); 1258 Set_Elem_Alignment (Any_Fixed); 1259 1260 Any_Integer := New_Standard_Entity ("an integer type"); 1261 Set_Ekind (Any_Integer, E_Signed_Integer_Type); 1262 Set_Scope (Any_Integer, Standard_Standard); 1263 Set_Etype (Any_Integer, Standard_Long_Long_Integer); 1264 Init_Size (Any_Integer, Standard_Long_Long_Integer_Size); 1265 Set_Elem_Alignment (Any_Integer); 1266 1267 Set_Integer_Bounds 1268 (Any_Integer, 1269 Typ => Base_Type (Standard_Integer), 1270 Lb => Uint_0, 1271 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer)))); 1272 1273 Any_Modular := New_Standard_Entity ("a modular type"); 1274 Set_Ekind (Any_Modular, E_Modular_Integer_Type); 1275 Set_Scope (Any_Modular, Standard_Standard); 1276 Set_Etype (Any_Modular, Standard_Long_Long_Integer); 1277 Init_Size (Any_Modular, Standard_Long_Long_Integer_Size); 1278 Set_Elem_Alignment (Any_Modular); 1279 Set_Is_Unsigned_Type (Any_Modular); 1280 1281 Any_Numeric := New_Standard_Entity ("a numeric type"); 1282 Set_Ekind (Any_Numeric, E_Signed_Integer_Type); 1283 Set_Scope (Any_Numeric, Standard_Standard); 1284 Set_Etype (Any_Numeric, Standard_Long_Long_Integer); 1285 Init_Size (Any_Numeric, Standard_Long_Long_Integer_Size); 1286 Set_Elem_Alignment (Any_Numeric); 1287 1288 Any_Real := New_Standard_Entity ("a real type"); 1289 Set_Ekind (Any_Real, E_Floating_Point_Type); 1290 Set_Scope (Any_Real, Standard_Standard); 1291 Set_Etype (Any_Real, Standard_Long_Long_Float); 1292 Init_Size (Any_Real, 1293 UI_To_Int (Esize (Standard_Long_Long_Float))); 1294 Set_Elem_Alignment (Any_Real); 1295 1296 Any_Scalar := New_Standard_Entity ("a scalar type"); 1297 Set_Ekind (Any_Scalar, E_Signed_Integer_Type); 1298 Set_Scope (Any_Scalar, Standard_Standard); 1299 Set_Etype (Any_Scalar, Any_Scalar); 1300 Init_Size (Any_Scalar, Standard_Integer_Size); 1301 Set_Elem_Alignment (Any_Scalar); 1302 1303 Any_String := New_Standard_Entity ("a string type"); 1304 Set_Ekind (Any_String, E_Array_Type); 1305 Set_Scope (Any_String, Standard_Standard); 1306 Set_Etype (Any_String, Any_String); 1307 Set_Component_Type (Any_String, Any_Character); 1308 Init_Size_Align (Any_String); 1309 Make_Dummy_Index (Any_String); 1310 1311 Raise_Type := New_Standard_Entity ("raise type"); 1312 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1313 Set_Defining_Identifier (Decl, Raise_Type); 1314 Set_Scope (Raise_Type, Standard_Standard); 1315 Build_Signed_Integer_Type (Raise_Type, Standard_Integer_Size); 1316 1317 Standard_Integer_8 := New_Standard_Entity ("integer_8"); 1318 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1319 Set_Defining_Identifier (Decl, Standard_Integer_8); 1320 Set_Scope (Standard_Integer_8, Standard_Standard); 1321 Build_Signed_Integer_Type (Standard_Integer_8, 8); 1322 1323 Standard_Integer_16 := New_Standard_Entity ("integer_16"); 1324 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1325 Set_Defining_Identifier (Decl, Standard_Integer_16); 1326 Set_Scope (Standard_Integer_16, Standard_Standard); 1327 Build_Signed_Integer_Type (Standard_Integer_16, 16); 1328 1329 Standard_Integer_32 := New_Standard_Entity ("integer_32"); 1330 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1331 Set_Defining_Identifier (Decl, Standard_Integer_32); 1332 Set_Scope (Standard_Integer_32, Standard_Standard); 1333 Build_Signed_Integer_Type (Standard_Integer_32, 32); 1334 1335 Standard_Integer_64 := New_Standard_Entity ("integer_64"); 1336 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1337 Set_Defining_Identifier (Decl, Standard_Integer_64); 1338 Set_Scope (Standard_Integer_64, Standard_Standard); 1339 Build_Signed_Integer_Type (Standard_Integer_64, 64); 1340 1341 -- Standard_*_Unsigned subtypes are not user visible, but they are 1342 -- used internally. They are unsigned types with the same length as 1343 -- the correspondingly named signed integer types. 1344 1345 Standard_Short_Short_Unsigned := New_Standard_Entity; 1346 Build_Unsigned_Integer_Type 1347 (Standard_Short_Short_Unsigned, 1348 Standard_Short_Short_Integer_Size, 1349 "short_short_unsigned"); 1350 1351 Standard_Short_Unsigned := New_Standard_Entity; 1352 Build_Unsigned_Integer_Type 1353 (Standard_Short_Unsigned, 1354 Standard_Short_Integer_Size, 1355 "short_unsigned"); 1356 1357 Standard_Unsigned := New_Standard_Entity; 1358 Build_Unsigned_Integer_Type 1359 (Standard_Unsigned, 1360 Standard_Integer_Size, 1361 "unsigned"); 1362 1363 Standard_Long_Unsigned := New_Standard_Entity; 1364 Build_Unsigned_Integer_Type 1365 (Standard_Long_Unsigned, 1366 Standard_Long_Integer_Size, 1367 "long_unsigned"); 1368 1369 Standard_Long_Long_Unsigned := New_Standard_Entity; 1370 Build_Unsigned_Integer_Type 1371 (Standard_Long_Long_Unsigned, 1372 Standard_Long_Long_Integer_Size, 1373 "long_long_unsigned"); 1374 1375 -- Standard_Unsigned_64 is not user visible, but is used internally. It 1376 -- is an unsigned type mod 2**64, 64-bits unsigned, size is 64. 1377 1378 Standard_Unsigned_64 := New_Standard_Entity; 1379 Build_Unsigned_Integer_Type (Standard_Unsigned_64, 64, "unsigned_64"); 1380 1381 -- Note: universal integer and universal real are constructed as fully 1382 -- formed signed numeric types, with parameters corresponding to the 1383 -- longest runtime types (Long_Long_Integer and Long_Long_Float). This 1384 -- allows Gigi to properly process references to universal types that 1385 -- are not folded at compile time. 1386 1387 Universal_Integer := New_Standard_Entity; 1388 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1389 Set_Defining_Identifier (Decl, Universal_Integer); 1390 Make_Name (Universal_Integer, "universal_integer"); 1391 Set_Scope (Universal_Integer, Standard_Standard); 1392 Build_Signed_Integer_Type 1393 (Universal_Integer, Standard_Long_Long_Integer_Size); 1394 1395 Universal_Real := New_Standard_Entity; 1396 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1397 Set_Defining_Identifier (Decl, Universal_Real); 1398 Make_Name (Universal_Real, "universal_real"); 1399 Set_Scope (Universal_Real, Standard_Standard); 1400 Copy_Float_Type (Universal_Real, Standard_Long_Long_Float); 1401 1402 -- Note: universal fixed, unlike universal integer and universal real, 1403 -- is never used at runtime, so it does not need to have bounds set. 1404 1405 Universal_Fixed := New_Standard_Entity; 1406 Decl := New_Node (N_Full_Type_Declaration, Stloc); 1407 Set_Defining_Identifier (Decl, Universal_Fixed); 1408 Make_Name (Universal_Fixed, "universal_fixed"); 1409 Set_Ekind (Universal_Fixed, E_Ordinary_Fixed_Point_Type); 1410 Set_Etype (Universal_Fixed, Universal_Fixed); 1411 Set_Scope (Universal_Fixed, Standard_Standard); 1412 Init_Size (Universal_Fixed, Standard_Long_Long_Integer_Size); 1413 Set_Elem_Alignment (Universal_Fixed); 1414 Set_Size_Known_At_Compile_Time 1415 (Universal_Fixed); 1416 1417 -- Create type declaration for Duration, using a 64-bit size. The 1418 -- delta and size values depend on the mode set in system.ads. 1419 1420 Build_Duration : declare 1421 Dlo : Uint; 1422 Dhi : Uint; 1423 Delta_Val : Ureal; 1424 1425 begin 1426 -- In 32 bit mode, the size is 32 bits, and the delta and 1427 -- small values are set to 20 milliseconds (20.0*(10.0**(-3)). 1428 1429 if Duration_32_Bits_On_Target then 1430 Dlo := Intval (Type_Low_Bound (Standard_Integer_32)); 1431 Dhi := Intval (Type_High_Bound (Standard_Integer_32)); 1432 Delta_Val := UR_From_Components (UI_From_Int (20), Uint_3, 10); 1433 1434 -- In 64-bit mode, the size is 64-bits and the delta and 1435 -- small values are set to nanoseconds (1.0*(10.0**(-9)). 1436 1437 else 1438 Dlo := Intval (Type_Low_Bound (Standard_Integer_64)); 1439 Dhi := Intval (Type_High_Bound (Standard_Integer_64)); 1440 Delta_Val := UR_From_Components (Uint_1, Uint_9, 10); 1441 end if; 1442 1443 Tdef_Node := Make_Ordinary_Fixed_Point_Definition (Stloc, 1444 Delta_Expression => Make_Real_Literal (Stloc, Delta_Val), 1445 Real_Range_Specification => 1446 Make_Real_Range_Specification (Stloc, 1447 Low_Bound => Make_Real_Literal (Stloc, 1448 Realval => Dlo * Delta_Val), 1449 High_Bound => Make_Real_Literal (Stloc, 1450 Realval => Dhi * Delta_Val))); 1451 1452 Set_Type_Definition (Parent (Standard_Duration), Tdef_Node); 1453 1454 Set_Ekind (Standard_Duration, E_Ordinary_Fixed_Point_Type); 1455 Set_Etype (Standard_Duration, Standard_Duration); 1456 1457 if Duration_32_Bits_On_Target then 1458 Init_Size (Standard_Duration, 32); 1459 else 1460 Init_Size (Standard_Duration, 64); 1461 end if; 1462 1463 Set_Elem_Alignment (Standard_Duration); 1464 Set_Delta_Value (Standard_Duration, Delta_Val); 1465 Set_Small_Value (Standard_Duration, Delta_Val); 1466 Set_Scalar_Range (Standard_Duration, 1467 Real_Range_Specification 1468 (Type_Definition (Parent (Standard_Duration)))); 1469 1470 -- Normally it does not matter that nodes in package Standard are 1471 -- not marked as analyzed. The Scalar_Range of the fixed-point type 1472 -- Standard_Duration is an exception, because of the special test 1473 -- made in Freeze.Freeze_Fixed_Point_Type. 1474 1475 Set_Analyzed (Scalar_Range (Standard_Duration)); 1476 1477 Set_Etype (Type_High_Bound (Standard_Duration), Standard_Duration); 1478 Set_Etype (Type_Low_Bound (Standard_Duration), Standard_Duration); 1479 1480 Set_Is_Static_Expression (Type_High_Bound (Standard_Duration)); 1481 Set_Is_Static_Expression (Type_Low_Bound (Standard_Duration)); 1482 1483 Set_Corresponding_Integer_Value 1484 (Type_High_Bound (Standard_Duration), Dhi); 1485 1486 Set_Corresponding_Integer_Value 1487 (Type_Low_Bound (Standard_Duration), Dlo); 1488 1489 Set_Size_Known_At_Compile_Time (Standard_Duration); 1490 end Build_Duration; 1491 1492 -- Build standard exception type. Note that the type name here is 1493 -- actually used in the generated code, so it must be set correctly. 1494 -- The type Standard_Exception_Type must be consistent with the type 1495 -- System.Standard_Library.Exception_Data, as the latter is what is 1496 -- known by the run-time. Components of the record are documented in 1497 -- the declaration in System.Standard_Library. 1498 1499 Standard_Exception_Type := New_Standard_Entity; 1500 Set_Ekind (Standard_Exception_Type, E_Record_Type); 1501 Set_Etype (Standard_Exception_Type, Standard_Exception_Type); 1502 Set_Scope (Standard_Exception_Type, Standard_Standard); 1503 Set_Stored_Constraint 1504 (Standard_Exception_Type, No_Elist); 1505 Init_Size_Align (Standard_Exception_Type); 1506 Set_Size_Known_At_Compile_Time 1507 (Standard_Exception_Type, True); 1508 Make_Name (Standard_Exception_Type, "exception"); 1509 1510 Make_Component 1511 (Standard_Exception_Type, Standard_Boolean, "Not_Handled_By_Others"); 1512 Make_Component 1513 (Standard_Exception_Type, Standard_Character, "Lang"); 1514 Make_Component 1515 (Standard_Exception_Type, Standard_Natural, "Name_Length"); 1516 Make_Component 1517 (Standard_Exception_Type, Standard_A_Char, "Full_Name"); 1518 Make_Component 1519 (Standard_Exception_Type, Standard_A_Char, "HTable_Ptr"); 1520 Make_Component 1521 (Standard_Exception_Type, Standard_A_Char, "Foreign_Data"); 1522 Make_Component 1523 (Standard_Exception_Type, Standard_A_Char, "Raise_Hook"); 1524 1525 -- Build tree for record declaration, for use by the back-end 1526 1527 declare 1528 Comp_List : List_Id; 1529 Comp : Entity_Id; 1530 1531 begin 1532 Comp := First_Entity (Standard_Exception_Type); 1533 Comp_List := New_List; 1534 while Present (Comp) loop 1535 Append ( 1536 Make_Component_Declaration (Stloc, 1537 Defining_Identifier => Comp, 1538 Component_Definition => 1539 Make_Component_Definition (Stloc, 1540 Aliased_Present => False, 1541 Subtype_Indication => New_Occurrence_Of (Etype (Comp), 1542 Stloc))), 1543 Comp_List); 1544 1545 Next_Entity (Comp); 1546 end loop; 1547 1548 Decl := Make_Full_Type_Declaration (Stloc, 1549 Defining_Identifier => Standard_Exception_Type, 1550 Type_Definition => 1551 Make_Record_Definition (Stloc, 1552 End_Label => Empty, 1553 Component_List => 1554 Make_Component_List (Stloc, 1555 Component_Items => Comp_List))); 1556 end; 1557 1558 Append (Decl, Decl_S); 1559 1560 Layout_Type (Standard_Exception_Type); 1561 1562 -- Create declarations of standard exceptions 1563 1564 Build_Exception (S_Constraint_Error); 1565 Build_Exception (S_Program_Error); 1566 Build_Exception (S_Storage_Error); 1567 Build_Exception (S_Tasking_Error); 1568 1569 -- Numeric_Error is a normal exception in Ada 83, but in Ada 95 1570 -- it is a renaming of Constraint_Error. Is this test too early??? 1571 1572 if Ada_Version = Ada_83 then 1573 Build_Exception (S_Numeric_Error); 1574 1575 else 1576 Decl := New_Node (N_Exception_Renaming_Declaration, Stloc); 1577 E_Id := Standard_Entity (S_Numeric_Error); 1578 1579 Set_Ekind (E_Id, E_Exception); 1580 Set_Etype (E_Id, Standard_Exception_Type); 1581 Set_Is_Public (E_Id); 1582 Set_Renamed_Entity (E_Id, Standard_Entity (S_Constraint_Error)); 1583 1584 Set_Defining_Identifier (Decl, E_Id); 1585 Append (Decl, Decl_S); 1586 1587 Ident_Node := New_Node (N_Identifier, Stloc); 1588 Set_Chars (Ident_Node, Chars (Standard_Entity (S_Constraint_Error))); 1589 Set_Entity (Ident_Node, Standard_Entity (S_Constraint_Error)); 1590 Set_Name (Decl, Ident_Node); 1591 end if; 1592 1593 -- Abort_Signal is an entity that does not get made visible 1594 1595 Abort_Signal := New_Standard_Entity; 1596 Set_Chars (Abort_Signal, Name_uAbort_Signal); 1597 Set_Ekind (Abort_Signal, E_Exception); 1598 Set_Etype (Abort_Signal, Standard_Exception_Type); 1599 Set_Scope (Abort_Signal, Standard_Standard); 1600 Set_Is_Public (Abort_Signal, True); 1601 Decl := 1602 Make_Exception_Declaration (Stloc, 1603 Defining_Identifier => Abort_Signal); 1604 1605 -- Create defining identifiers for shift operator entities. Note 1606 -- that these entities are used only for marking shift operators 1607 -- generated internally, and hence need no structure, just a name 1608 -- and a unique identity. 1609 1610 Standard_Op_Rotate_Left := New_Standard_Entity; 1611 Set_Chars (Standard_Op_Rotate_Left, Name_Rotate_Left); 1612 Set_Ekind (Standard_Op_Rotate_Left, E_Operator); 1613 1614 Standard_Op_Rotate_Right := New_Standard_Entity; 1615 Set_Chars (Standard_Op_Rotate_Right, Name_Rotate_Right); 1616 Set_Ekind (Standard_Op_Rotate_Right, E_Operator); 1617 1618 Standard_Op_Shift_Left := New_Standard_Entity; 1619 Set_Chars (Standard_Op_Shift_Left, Name_Shift_Left); 1620 Set_Ekind (Standard_Op_Shift_Left, E_Operator); 1621 1622 Standard_Op_Shift_Right := New_Standard_Entity; 1623 Set_Chars (Standard_Op_Shift_Right, Name_Shift_Right); 1624 Set_Ekind (Standard_Op_Shift_Right, E_Operator); 1625 1626 Standard_Op_Shift_Right_Arithmetic := New_Standard_Entity; 1627 Set_Chars (Standard_Op_Shift_Right_Arithmetic, 1628 Name_Shift_Right_Arithmetic); 1629 Set_Ekind (Standard_Op_Shift_Right_Arithmetic, 1630 E_Operator); 1631 1632 -- Create standard operator declarations 1633 1634 Create_Operators; 1635 1636 -- Initialize visibility table with entities in Standard 1637 1638 for E in Standard_Entity_Type loop 1639 if Ekind (Standard_Entity (E)) /= E_Operator then 1640 Set_Name_Entity_Id 1641 (Chars (Standard_Entity (E)), Standard_Entity (E)); 1642 Set_Homonym (Standard_Entity (E), Empty); 1643 end if; 1644 1645 if E not in S_ASCII_Names then 1646 Set_Scope (Standard_Entity (E), Standard_Standard); 1647 Set_Is_Immediately_Visible (Standard_Entity (E)); 1648 end if; 1649 end loop; 1650 1651 -- The predefined package Standard itself does not have a scope; 1652 -- it is the only entity in the system not to have one, and this 1653 -- is what identifies the package to Gigi. 1654 1655 Set_Scope (Standard_Standard, Empty); 1656 1657 -- Set global variables indicating last Id values and version 1658 1659 Last_Standard_Node_Id := Last_Node_Id; 1660 Last_Standard_List_Id := Last_List_Id; 1661 1662 -- The Error node has an Etype of Any_Type to help error recovery 1663 1664 Set_Etype (Error, Any_Type); 1665 1666 -- Print representation of standard if switch set 1667 1668 if Opt.Print_Standard then 1669 Print_Standard; 1670 end if; 1671 end Create_Standard; 1672 1673 ------------------------------------ 1674 -- Create_Unconstrained_Base_Type -- 1675 ------------------------------------ 1676 1677 procedure Create_Unconstrained_Base_Type 1678 (E : Entity_Id; 1679 K : Entity_Kind) 1680 is 1681 New_Ent : constant Entity_Id := New_Copy (E); 1682 1683 begin 1684 Set_Ekind (E, K); 1685 Set_Is_Constrained (E, True); 1686 Set_Is_First_Subtype (E, True); 1687 Set_Etype (E, New_Ent); 1688 1689 Append_Entity (New_Ent, Standard_Standard); 1690 Set_Is_Constrained (New_Ent, False); 1691 Set_Etype (New_Ent, New_Ent); 1692 Set_Is_Known_Valid (New_Ent, True); 1693 1694 if K = E_Signed_Integer_Subtype then 1695 Set_Etype (Low_Bound (Scalar_Range (E)), New_Ent); 1696 Set_Etype (High_Bound (Scalar_Range (E)), New_Ent); 1697 end if; 1698 1699 end Create_Unconstrained_Base_Type; 1700 1701 -------------------- 1702 -- Identifier_For -- 1703 -------------------- 1704 1705 function Identifier_For (S : Standard_Entity_Type) return Node_Id is 1706 Ident_Node : Node_Id; 1707 begin 1708 Ident_Node := New_Node (N_Identifier, Stloc); 1709 Set_Chars (Ident_Node, Chars (Standard_Entity (S))); 1710 Set_Entity (Ident_Node, Standard_Entity (S)); 1711 return Ident_Node; 1712 end Identifier_For; 1713 1714 -------------------- 1715 -- Make_Component -- 1716 -------------------- 1717 1718 procedure Make_Component 1719 (Rec : Entity_Id; 1720 Typ : Entity_Id; 1721 Nam : String) 1722 is 1723 Id : constant Entity_Id := New_Standard_Entity; 1724 1725 begin 1726 Set_Ekind (Id, E_Component); 1727 Set_Etype (Id, Typ); 1728 Set_Scope (Id, Rec); 1729 Init_Component_Location (Id); 1730 1731 Set_Original_Record_Component (Id, Id); 1732 Make_Name (Id, Nam); 1733 Append_Entity (Id, Rec); 1734 end Make_Component; 1735 1736 ----------------- 1737 -- Make_Formal -- 1738 ----------------- 1739 1740 function Make_Formal 1741 (Typ : Entity_Id; 1742 Formal_Name : String) return Entity_Id 1743 is 1744 Formal : Entity_Id; 1745 1746 begin 1747 Formal := New_Standard_Entity; 1748 1749 Set_Ekind (Formal, E_In_Parameter); 1750 Set_Mechanism (Formal, Default_Mechanism); 1751 Set_Scope (Formal, Standard_Standard); 1752 Set_Etype (Formal, Typ); 1753 Make_Name (Formal, Formal_Name); 1754 1755 return Formal; 1756 end Make_Formal; 1757 1758 ------------------ 1759 -- Make_Integer -- 1760 ------------------ 1761 1762 function Make_Integer (V : Uint) return Node_Id is 1763 N : constant Node_Id := Make_Integer_Literal (Stloc, V); 1764 begin 1765 Set_Is_Static_Expression (N); 1766 return N; 1767 end Make_Integer; 1768 1769 --------------- 1770 -- Make_Name -- 1771 --------------- 1772 1773 procedure Make_Name (Id : Entity_Id; Nam : String) is 1774 begin 1775 for J in 1 .. Nam'Length loop 1776 Name_Buffer (J) := Fold_Lower (Nam (Nam'First + (J - 1))); 1777 end loop; 1778 1779 Name_Len := Nam'Length; 1780 Set_Chars (Id, Name_Find); 1781 end Make_Name; 1782 1783 ------------------ 1784 -- New_Operator -- 1785 ------------------ 1786 1787 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id is 1788 Ident_Node : Entity_Id; 1789 1790 begin 1791 Ident_Node := Make_Defining_Identifier (Stloc, Op); 1792 1793 Set_Is_Pure (Ident_Node, True); 1794 Set_Ekind (Ident_Node, E_Operator); 1795 Set_Etype (Ident_Node, Typ); 1796 Set_Scope (Ident_Node, Standard_Standard); 1797 Set_Homonym (Ident_Node, Get_Name_Entity_Id (Op)); 1798 Set_Convention (Ident_Node, Convention_Intrinsic); 1799 1800 Set_Is_Immediately_Visible (Ident_Node, True); 1801 Set_Is_Intrinsic_Subprogram (Ident_Node, True); 1802 1803 Set_Name_Entity_Id (Op, Ident_Node); 1804 Append_Entity (Ident_Node, Standard_Standard); 1805 return Ident_Node; 1806 end New_Operator; 1807 1808 ------------------------- 1809 -- New_Standard_Entity -- 1810 ------------------------- 1811 1812 function New_Standard_Entity 1813 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id 1814 is 1815 E : constant Entity_Id := New_Entity (New_Node_Kind, Stloc); 1816 1817 begin 1818 -- All standard entities are Pure and Public 1819 1820 Set_Is_Pure (E); 1821 Set_Is_Public (E); 1822 1823 -- All standard entity names are analyzed manually, and are thus 1824 -- frozen as soon as they are created. 1825 1826 Set_Is_Frozen (E); 1827 1828 -- Set debug information required for all standard types 1829 1830 Set_Needs_Debug_Info (E); 1831 1832 -- All standard entities are built with fully qualified names, so 1833 -- set the flag to prevent an abortive attempt at requalification. 1834 1835 Set_Has_Qualified_Name (E); 1836 1837 -- Return newly created entity to be completed by caller 1838 1839 return E; 1840 end New_Standard_Entity; 1841 1842 function New_Standard_Entity (S : String) return Entity_Id is 1843 Ent : constant Entity_Id := New_Standard_Entity; 1844 begin 1845 Make_Name (Ent, S); 1846 return Ent; 1847 end New_Standard_Entity; 1848 1849 -------------------- 1850 -- Print_Standard -- 1851 -------------------- 1852 1853 procedure Print_Standard is 1854 1855 procedure P (Item : String) renames Output.Write_Line; 1856 -- Short-hand, since we do a lot of line writes here 1857 1858 procedure P_Int_Range (Size : Pos); 1859 -- Prints the range of an integer based on its Size 1860 1861 procedure P_Float_Range (Id : Entity_Id); 1862 -- Prints the bounds range for the given float type entity 1863 1864 procedure P_Float_Type (Id : Entity_Id); 1865 -- Prints the type declaration of the given float type entity 1866 1867 procedure P_Mixed_Name (Id : Name_Id); 1868 -- Prints Id in mixed case 1869 1870 ------------------- 1871 -- P_Float_Range -- 1872 ------------------- 1873 1874 procedure P_Float_Range (Id : Entity_Id) is 1875 begin 1876 Write_Str (" range "); 1877 UR_Write (Realval (Type_Low_Bound (Id))); 1878 Write_Str (" .. "); 1879 UR_Write (Realval (Type_High_Bound (Id))); 1880 Write_Str (";"); 1881 Write_Eol; 1882 end P_Float_Range; 1883 1884 ------------------ 1885 -- P_Float_Type -- 1886 ------------------ 1887 1888 procedure P_Float_Type (Id : Entity_Id) is 1889 begin 1890 Write_Str (" type "); 1891 P_Mixed_Name (Chars (Id)); 1892 Write_Str (" is digits "); 1893 Write_Int (UI_To_Int (Digits_Value (Id))); 1894 Write_Eol; 1895 P_Float_Range (Id); 1896 Write_Str (" for "); 1897 P_Mixed_Name (Chars (Id)); 1898 Write_Str ("'Size use "); 1899 Write_Int (UI_To_Int (RM_Size (Id))); 1900 Write_Line (";"); 1901 Write_Eol; 1902 end P_Float_Type; 1903 1904 ----------------- 1905 -- P_Int_Range -- 1906 ----------------- 1907 1908 procedure P_Int_Range (Size : Pos) is 1909 begin 1910 Write_Str (" is range -(2 **"); 1911 Write_Int (Size - 1); 1912 Write_Str (")"); 1913 Write_Str (" .. +(2 **"); 1914 Write_Int (Size - 1); 1915 Write_Str (" - 1);"); 1916 Write_Eol; 1917 end P_Int_Range; 1918 1919 ------------------ 1920 -- P_Mixed_Name -- 1921 ------------------ 1922 1923 procedure P_Mixed_Name (Id : Name_Id) is 1924 begin 1925 Get_Name_String (Id); 1926 1927 for J in 1 .. Name_Len loop 1928 if J = 1 or else Name_Buffer (J - 1) = '_' then 1929 Name_Buffer (J) := Fold_Upper (Name_Buffer (J)); 1930 end if; 1931 end loop; 1932 1933 Write_Str (Name_Buffer (1 .. Name_Len)); 1934 end P_Mixed_Name; 1935 1936 -- Start of processing for Print_Standard 1937 1938 begin 1939 P ("-- Representation of package Standard"); 1940 Write_Eol; 1941 P ("-- This is not accurate Ada, since new base types cannot be "); 1942 P ("-- created, but the listing shows the target dependent"); 1943 P ("-- characteristics of the Standard types for this compiler"); 1944 Write_Eol; 1945 1946 P ("package Standard is"); 1947 P ("pragma Pure (Standard);"); 1948 Write_Eol; 1949 1950 P (" type Boolean is (False, True);"); 1951 P (" for Boolean'Size use 1;"); 1952 P (" for Boolean use (False => 0, True => 1);"); 1953 Write_Eol; 1954 1955 -- Integer types 1956 1957 Write_Str (" type Integer"); 1958 P_Int_Range (Standard_Integer_Size); 1959 Write_Str (" for Integer'Size use "); 1960 Write_Int (Standard_Integer_Size); 1961 P (";"); 1962 Write_Eol; 1963 1964 P (" subtype Natural is Integer range 0 .. Integer'Last;"); 1965 P (" subtype Positive is Integer range 1 .. Integer'Last;"); 1966 Write_Eol; 1967 1968 Write_Str (" type Short_Short_Integer"); 1969 P_Int_Range (Standard_Short_Short_Integer_Size); 1970 Write_Str (" for Short_Short_Integer'Size use "); 1971 Write_Int (Standard_Short_Short_Integer_Size); 1972 P (";"); 1973 Write_Eol; 1974 1975 Write_Str (" type Short_Integer"); 1976 P_Int_Range (Standard_Short_Integer_Size); 1977 Write_Str (" for Short_Integer'Size use "); 1978 Write_Int (Standard_Short_Integer_Size); 1979 P (";"); 1980 Write_Eol; 1981 1982 Write_Str (" type Long_Integer"); 1983 P_Int_Range (Standard_Long_Integer_Size); 1984 Write_Str (" for Long_Integer'Size use "); 1985 Write_Int (Standard_Long_Integer_Size); 1986 P (";"); 1987 Write_Eol; 1988 1989 Write_Str (" type Long_Long_Integer"); 1990 P_Int_Range (Standard_Long_Long_Integer_Size); 1991 Write_Str (" for Long_Long_Integer'Size use "); 1992 Write_Int (Standard_Long_Long_Integer_Size); 1993 P (";"); 1994 Write_Eol; 1995 1996 -- Floating point types 1997 1998 P_Float_Type (Standard_Short_Float); 1999 P_Float_Type (Standard_Float); 2000 P_Float_Type (Standard_Long_Float); 2001 P_Float_Type (Standard_Long_Long_Float); 2002 2003 P (" type Character is (...)"); 2004 Write_Str (" for Character'Size use "); 2005 Write_Int (Standard_Character_Size); 2006 P (";"); 2007 P (" -- See RM A.1(35) for details of this type"); 2008 Write_Eol; 2009 2010 P (" type Wide_Character is (...)"); 2011 Write_Str (" for Wide_Character'Size use "); 2012 Write_Int (Standard_Wide_Character_Size); 2013 P (";"); 2014 P (" -- See RM A.1(36) for details of this type"); 2015 Write_Eol; 2016 2017 P (" type Wide_Wide_Character is (...)"); 2018 Write_Str (" for Wide_Wide_Character'Size use "); 2019 Write_Int (Standard_Wide_Wide_Character_Size); 2020 P (";"); 2021 P (" -- See RM A.1(36) for details of this type"); 2022 2023 P (" type String is array (Positive range <>) of Character;"); 2024 P (" pragma Pack (String);"); 2025 Write_Eol; 2026 2027 P (" type Wide_String is array (Positive range <>)" & 2028 " of Wide_Character;"); 2029 P (" pragma Pack (Wide_String);"); 2030 Write_Eol; 2031 2032 P (" type Wide_Wide_String is array (Positive range <>)" & 2033 " of Wide_Wide_Character;"); 2034 P (" pragma Pack (Wide_Wide_String);"); 2035 Write_Eol; 2036 2037 -- We only have one representation each for 32-bit and 64-bit sizes, 2038 -- so select the right one based on Duration_32_Bits_On_Target. 2039 2040 if Duration_32_Bits_On_Target then 2041 P (" type Duration is delta 0.020"); 2042 P (" range -((2 ** 31) * 0.020) .."); 2043 P (" +((2 ** 31 - 1) * 0.020);"); 2044 P (" for Duration'Small use 0.020;"); 2045 2046 else 2047 P (" type Duration is delta 0.000000001"); 2048 P (" range -((2 ** 63) * 0.000000001) .."); 2049 P (" +((2 ** 63 - 1) * 0.000000001);"); 2050 P (" for Duration'Small use 0.000000001;"); 2051 end if; 2052 2053 Write_Eol; 2054 2055 P (" Constraint_Error : exception;"); 2056 P (" Program_Error : exception;"); 2057 P (" Storage_Error : exception;"); 2058 P (" Tasking_Error : exception;"); 2059 P (" Numeric_Error : exception renames Constraint_Error;"); 2060 Write_Eol; 2061 2062 P ("end Standard;"); 2063 end Print_Standard; 2064 2065 ------------------------- 2066 -- Register_Float_Type -- 2067 ------------------------- 2068 2069 procedure Register_Float_Type 2070 (Name : String; 2071 Digs : Positive; 2072 Float_Rep : Float_Rep_Kind; 2073 Precision : Positive; 2074 Size : Positive; 2075 Alignment : Natural) 2076 is 2077 pragma Unreferenced (Precision); 2078 -- See Build_Float_Type for the rationale 2079 2080 Ent : constant Entity_Id := New_Standard_Entity; 2081 2082 begin 2083 Set_Defining_Identifier (New_Node (N_Full_Type_Declaration, Stloc), Ent); 2084 Make_Name (Ent, Name); 2085 Set_Scope (Ent, Standard_Standard); 2086 Build_Float_Type 2087 (Ent, Pos (Digs), Float_Rep, Int (Size), Int (Alignment / 8)); 2088 2089 if No (Back_End_Float_Types) then 2090 Back_End_Float_Types := New_Elmt_List; 2091 end if; 2092 2093 Append_Elmt (Ent, Back_End_Float_Types); 2094 end Register_Float_Type; 2095 2096 ---------------------- 2097 -- Set_Float_Bounds -- 2098 ---------------------- 2099 2100 procedure Set_Float_Bounds (Id : Entity_Id) is 2101 L : Node_Id; 2102 H : Node_Id; 2103 -- Low and high bounds of literal value 2104 2105 R : Node_Id; 2106 -- Range specification 2107 2108 Radix : constant Uint := Machine_Radix_Value (Id); 2109 Mantissa : constant Uint := Machine_Mantissa_Value (Id); 2110 Emax : constant Uint := Machine_Emax_Value (Id); 2111 Significand : constant Uint := Radix ** Mantissa - 1; 2112 Exponent : constant Uint := Emax - Mantissa; 2113 2114 begin 2115 H := Make_Float_Literal (Stloc, Radix, Significand, Exponent); 2116 L := Make_Float_Literal (Stloc, Radix, -Significand, Exponent); 2117 2118 Set_Etype (L, Id); 2119 Set_Is_Static_Expression (L); 2120 2121 Set_Etype (H, Id); 2122 Set_Is_Static_Expression (H); 2123 2124 R := New_Node (N_Range, Stloc); 2125 Set_Low_Bound (R, L); 2126 Set_High_Bound (R, H); 2127 Set_Includes_Infinities (R, True); 2128 Set_Scalar_Range (Id, R); 2129 Set_Etype (R, Id); 2130 Set_Parent (R, Id); 2131 end Set_Float_Bounds; 2132 2133 ------------------------ 2134 -- Set_Integer_Bounds -- 2135 ------------------------ 2136 2137 procedure Set_Integer_Bounds 2138 (Id : Entity_Id; 2139 Typ : Entity_Id; 2140 Lb : Uint; 2141 Hb : Uint) 2142 is 2143 L : Node_Id; 2144 H : Node_Id; 2145 -- Low and high bounds of literal value 2146 2147 R : Node_Id; 2148 -- Range specification 2149 2150 begin 2151 L := Make_Integer (Lb); 2152 H := Make_Integer (Hb); 2153 2154 Set_Etype (L, Typ); 2155 Set_Etype (H, Typ); 2156 2157 R := New_Node (N_Range, Stloc); 2158 Set_Low_Bound (R, L); 2159 Set_High_Bound (R, H); 2160 Set_Scalar_Range (Id, R); 2161 Set_Etype (R, Typ); 2162 Set_Parent (R, Id); 2163 Set_Is_Unsigned_Type (Id, Lb >= 0); 2164 end Set_Integer_Bounds; 2165 2166end CStand; 2167