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