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2010-07-27 Paolo Carlini <paolo.carlini@oracle.com>
[official-gcc/alias-decl.git] / gcc / ada / cstand.adb
blob9f9332b72419a662566f5e062fc69b8d9649836f
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- C S T A N D --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2010, 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 Layout; use Layout;
31 with Namet; use Namet;
32 with Nlists; use Nlists;
33 with Nmake; use Nmake;
34 with Opt; use Opt;
35 with Output; use Output;
36 with Targparm; use Targparm;
37 with Tbuild; use Tbuild;
38 with Ttypes; use Ttypes;
39 with Ttypef; use Ttypef;
40 with Scn;
41 with Sem_Mech; use Sem_Mech;
42 with Sem_Util; use Sem_Util;
43 with Sinfo; use Sinfo;
44 with Snames; use Snames;
45 with Stand; use Stand;
46 with Uintp; use Uintp;
47 with Urealp; use Urealp;
48
49 package 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 -----------------------
56 -- Local Subprograms --
57 -----------------------
58
59 procedure Build_Float_Type (E : Entity_Id; Siz : Int; Digs : Int);
60 -- Procedure to build standard predefined float base type. The first
61 -- parameter is the entity for the type, and the second parameter
62 -- is the size in bits. The third parameter is the digits value.
63
64 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Int);
65 -- Procedure to build standard predefined signed integer subtype. The
66 -- first parameter is the entity for the subtype. The second parameter
67 -- is the size in bits. The corresponding base type is not built by
68 -- this routine but instead must be built by the caller where needed.
69
70 procedure Create_Operators;
71 -- Make entries for each of the predefined operators in Standard
72
73 procedure Create_Unconstrained_Base_Type
74 (E : Entity_Id;
75 K : Entity_Kind);
76 -- The predefined signed integer types are constrained subtypes which
77 -- must have a corresponding unconstrained base type. This type is almost
78 -- useless. The only place it has semantics is Subtypes_Statically_Match.
79 -- Consequently, we arrange for it to be identical apart from the setting
80 -- of the constrained bit. This routine takes an entity E for the Type,
81 -- copies it to estabish the base type, then resets the Ekind of the
82 -- original entity to K (the Ekind for the subtype). The Etype field of
83 -- E is set by the call (to point to the created base type entity), and
84 -- also the Is_Constrained flag of E is set.
85 --
86 -- To understand the exact requirement for this, see RM 3.5.4(11) which
87 -- makes it clear that Integer, for example, is constrained, with the
88 -- constraint bounds matching the bounds of the (unconstrained) base
89 -- type. The point is that Integer and Integer'Base have identical
90 -- bounds, but do not statically match, since a subtype with constraints
91 -- never matches a subtype with no constraints.
92
93 function Identifier_For (S : Standard_Entity_Type) return Node_Id;
94 -- Returns an identifier node with the same name as the defining
95 -- identifier corresponding to the given Standard_Entity_Type value
96
97 procedure Make_Component
98 (Rec : Entity_Id;
99 Typ : Entity_Id;
100 Nam : String);
101 -- Build a record component with the given type and name, and append to
102 -- the list of components of Rec.
103
104 function Make_Formal
105 (Typ : Entity_Id;
106 Formal_Name : String) return Entity_Id;
107 -- Construct entity for subprogram formal with given name and type
108
109 function Make_Integer (V : Uint) return Node_Id;
110 -- Builds integer literal with given value
111
112 procedure Make_Name (Id : Entity_Id; Nam : String);
113 -- Make an entry in the names table for Nam, and set as Chars field of Id
114
115 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id;
116 -- Build entity for standard operator with given name and type
117
118 function New_Standard_Entity
119 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id;
120 -- Builds a new entity for Standard
121
122 procedure Print_Standard;
123 -- Print representation of package Standard if switch set
124
125 procedure Set_Integer_Bounds
126 (Id : Entity_Id;
127 Typ : Entity_Id;
128 Lb : Uint;
129 Hb : Uint);
130 -- Procedure to set bounds for integer type or subtype. Id is the entity
131 -- whose bounds and type are to be set. The Typ parameter is the Etype
132 -- value for the entity (which will be the same as Id for all predefined
133 -- integer base types. The third and fourth parameters are the bounds.
134
135 ----------------------
136 -- Build_Float_Type --
137 ----------------------
138
139 procedure Build_Float_Type (E : Entity_Id; Siz : Int; Digs : Int) is
140 begin
141 Set_Type_Definition (Parent (E),
142 Make_Floating_Point_Definition (Stloc,
143 Digits_Expression => Make_Integer (UI_From_Int (Digs))));
144 Set_Ekind (E, E_Floating_Point_Type);
145 Set_Etype (E, E);
146 Init_Size (E, Siz);
147 Set_Elem_Alignment (E);
148 Init_Digits_Value (E, Digs);
149 Set_Float_Bounds (E);
150 Set_Is_Frozen (E);
151 Set_Is_Public (E);
152 Set_Size_Known_At_Compile_Time (E);
153 end Build_Float_Type;
154
155 -------------------------------
156 -- Build_Signed_Integer_Type --
157 -------------------------------
158
159 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Int) is
160 U2Siz1 : constant Uint := 2 ** (Siz - 1);
161 Lbound : constant Uint := -U2Siz1;
162 Ubound : constant Uint := U2Siz1 - 1;
163
164 begin
165 Set_Type_Definition (Parent (E),
166 Make_Signed_Integer_Type_Definition (Stloc,
167 Low_Bound => Make_Integer (Lbound),
168 High_Bound => Make_Integer (Ubound)));
169
170 Set_Ekind (E, E_Signed_Integer_Type);
171 Set_Etype (E, E);
172 Init_Size (E, Siz);
173 Set_Elem_Alignment (E);
174 Set_Integer_Bounds (E, E, Lbound, Ubound);
175 Set_Is_Frozen (E);
176 Set_Is_Public (E);
177 Set_Is_Known_Valid (E);
178 Set_Size_Known_At_Compile_Time (E);
179 end Build_Signed_Integer_Type;
180
181 ----------------------
182 -- Create_Operators --
183 ----------------------
184
185 -- Each operator has an abbreviated signature. The formals have the names
186 -- LEFT and RIGHT. Their types are not actually used for resolution.
187
188 procedure Create_Operators is
189 Op_Node : Entity_Id;
190
191 -- The following tables define the binary and unary operators and their
192 -- corresponding result type.
193
194 Binary_Ops : constant array (S_Binary_Ops) of Name_Id :=
195
196 -- There is one entry here for each binary operator, except for the
197 -- case of concatenation, where there are three entries, one for a
198 -- String result, one for Wide_String, and one for Wide_Wide_String.
199
200 (Name_Op_Add,
201 Name_Op_And,
202 Name_Op_Concat,
203 Name_Op_Concat,
204 Name_Op_Concat,
205 Name_Op_Divide,
206 Name_Op_Eq,
207 Name_Op_Expon,
208 Name_Op_Ge,
209 Name_Op_Gt,
210 Name_Op_Le,
211 Name_Op_Lt,
212 Name_Op_Mod,
213 Name_Op_Multiply,
214 Name_Op_Ne,
215 Name_Op_Or,
216 Name_Op_Rem,
217 Name_Op_Subtract,
218 Name_Op_Xor);
219
220 Bin_Op_Types : constant array (S_Binary_Ops) of Entity_Id :=
221
222 -- This table has the corresponding result types. The entries are
223 -- ordered so they correspond to the Binary_Ops array above.
224
225 (Universal_Integer, -- Add
226 Standard_Boolean, -- And
227 Standard_String, -- Concat (String)
228 Standard_Wide_String, -- Concat (Wide_String)
229 Standard_Wide_Wide_String, -- Concat (Wide_Wide_String)
230 Universal_Integer, -- Divide
231 Standard_Boolean, -- Eq
232 Universal_Integer, -- Expon
233 Standard_Boolean, -- Ge
234 Standard_Boolean, -- Gt
235 Standard_Boolean, -- Le
236 Standard_Boolean, -- Lt
237 Universal_Integer, -- Mod
238 Universal_Integer, -- Multiply
239 Standard_Boolean, -- Ne
240 Standard_Boolean, -- Or
241 Universal_Integer, -- Rem
242 Universal_Integer, -- Subtract
243 Standard_Boolean); -- Xor
244
245 Unary_Ops : constant array (S_Unary_Ops) of Name_Id :=
246
247 -- There is one entry here for each unary operator
248
249 (Name_Op_Abs,
250 Name_Op_Subtract,
251 Name_Op_Not,
252 Name_Op_Add);
253
254 Unary_Op_Types : constant array (S_Unary_Ops) of Entity_Id :=
255
256 -- This table has the corresponding result types. The entries are
257 -- ordered so they correspond to the Unary_Ops array above.
258
259 (Universal_Integer, -- Abs
260 Universal_Integer, -- Subtract
261 Standard_Boolean, -- Not
262 Universal_Integer); -- Add
263
264 begin
265 for J in S_Binary_Ops loop
266 Op_Node := New_Operator (Binary_Ops (J), Bin_Op_Types (J));
267 SE (J) := Op_Node;
268 Append_Entity (Make_Formal (Any_Type, "LEFT"), Op_Node);
269 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
270 end loop;
271
272 for J in S_Unary_Ops loop
273 Op_Node := New_Operator (Unary_Ops (J), Unary_Op_Types (J));
274 SE (J) := Op_Node;
275 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
276 end loop;
277
278 -- For concatenation, we create a separate operator for each
279 -- array type. This simplifies the resolution of the component-
280 -- component concatenation operation. In Standard, we set the types
281 -- of the formals for string, wide [wide]_string, concatenations.
282
283 Set_Etype (First_Entity (Standard_Op_Concat), Standard_String);
284 Set_Etype (Last_Entity (Standard_Op_Concat), Standard_String);
285
286 Set_Etype (First_Entity (Standard_Op_Concatw), Standard_Wide_String);
287 Set_Etype (Last_Entity (Standard_Op_Concatw), Standard_Wide_String);
288
289 Set_Etype (First_Entity (Standard_Op_Concatww),
290 Standard_Wide_Wide_String);
291
292 Set_Etype (Last_Entity (Standard_Op_Concatww),
293 Standard_Wide_Wide_String);
294 end Create_Operators;
295
296 ---------------------
297 -- Create_Standard --
298 ---------------------
299
300 -- The tree for the package Standard is prefixed to all compilations.
301 -- Several entities required by semantic analysis are denoted by global
302 -- variables that are initialized to point to the corresponding
303 -- occurrences in STANDARD. The visible entities of STANDARD are
304 -- created here. The private entities defined in STANDARD are created
305 -- by Initialize_Standard in the semantics module.
306
307 procedure Create_Standard is
308 Decl_S : constant List_Id := New_List;
309 -- List of declarations in Standard
310
311 Decl_A : constant List_Id := New_List;
312 -- List of declarations in ASCII
313
314 Decl : Node_Id;
315 Pspec : Node_Id;
316 Tdef_Node : Node_Id;
317 Ident_Node : Node_Id;
318 Ccode : Char_Code;
319 E_Id : Entity_Id;
320 R_Node : Node_Id;
321 B_Node : Node_Id;
322
323 procedure Build_Exception (S : Standard_Entity_Type);
324 -- Procedure to declare given entity as an exception
325
326 procedure Pack_String_Type (String_Type : Entity_Id);
327 -- Generate proper tree for pragma Pack that applies to given type, and
328 -- mark type as having the pragma.
329
330 ---------------------
331 -- Build_Exception --
332 ---------------------
333
334 procedure Build_Exception (S : Standard_Entity_Type) is
335 begin
336 Set_Ekind (Standard_Entity (S), E_Exception);
337 Set_Etype (Standard_Entity (S), Standard_Exception_Type);
338 Set_Exception_Code (Standard_Entity (S), Uint_0);
339 Set_Is_Public (Standard_Entity (S), True);
340
341 Decl :=
342 Make_Exception_Declaration (Stloc,
343 Defining_Identifier => Standard_Entity (S));
344 Append (Decl, Decl_S);
345 end Build_Exception;
346
347 ----------------------
348 -- Pack_String_Type --
349 ----------------------
350
351 procedure Pack_String_Type (String_Type : Entity_Id) is
352 Prag : constant Node_Id :=
353 Make_Pragma (Stloc,
354 Chars => Name_Pack,
355 Pragma_Argument_Associations =>
356 New_List (
357 Make_Pragma_Argument_Association (Stloc,
358 Expression =>
359 New_Occurrence_Of (String_Type, Stloc))));
360 begin
361 Append (Prag, Decl_S);
362 Record_Rep_Item (String_Type, Prag);
363 Set_Has_Pragma_Pack (String_Type, True);
364 end Pack_String_Type;
365
366 -- Start of processing for Create_Standard
367
368 begin
369 -- Initialize scanner for internal scans of literals
370
371 Scn.Initialize_Scanner (No_Unit, Internal_Source_File);
372
373 -- First step is to create defining identifiers for each entity
374
375 for S in Standard_Entity_Type loop
376 declare
377 S_Name : constant String := Standard_Entity_Type'Image (S);
378 -- Name of entity (note we skip S_ at the start)
379
380 Ident_Node : Node_Id;
381 -- Defining identifier node
382
383 begin
384 Ident_Node := New_Standard_Entity;
385 Make_Name (Ident_Node, S_Name (3 .. S_Name'Length));
386 Standard_Entity (S) := Ident_Node;
387 end;
388 end loop;
389
390 -- Create package declaration node for package Standard
391
392 Standard_Package_Node := New_Node (N_Package_Declaration, Stloc);
393
394 Pspec := New_Node (N_Package_Specification, Stloc);
395 Set_Specification (Standard_Package_Node, Pspec);
396
397 Set_Defining_Unit_Name (Pspec, Standard_Standard);
398 Set_Visible_Declarations (Pspec, Decl_S);
399
400 Set_Ekind (Standard_Standard, E_Package);
401 Set_Is_Pure (Standard_Standard);
402 Set_Is_Compilation_Unit (Standard_Standard);
403
404 -- Create type/subtype declaration nodes for standard types
405
406 for S in S_Types loop
407
408 -- Subtype declaration case
409
410 if S = S_Natural or else S = S_Positive then
411 Decl := New_Node (N_Subtype_Declaration, Stloc);
412 Set_Subtype_Indication (Decl,
413 New_Occurrence_Of (Standard_Integer, Stloc));
414
415 -- Full type declaration case
416
417 else
418 Decl := New_Node (N_Full_Type_Declaration, Stloc);
419 end if;
420
421 Set_Is_Frozen (Standard_Entity (S));
422 Set_Is_Public (Standard_Entity (S));
423 Set_Defining_Identifier (Decl, Standard_Entity (S));
424 Append (Decl, Decl_S);
425 end loop;
426
427 -- Create type definition node for type Boolean. The Size is set to
428 -- 1 as required by Ada 95 and current ARG interpretations for Ada/83.
429
430 -- Note: Object_Size of Boolean is 8. This means that we do NOT in
431 -- general know that Boolean variables have valid values, so we do
432 -- not set the Is_Known_Valid flag.
433
434 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
435 Set_Literals (Tdef_Node, New_List);
436 Append (Standard_False, Literals (Tdef_Node));
437 Append (Standard_True, Literals (Tdef_Node));
438 Set_Type_Definition (Parent (Standard_Boolean), Tdef_Node);
439
440 Set_Ekind (Standard_Boolean, E_Enumeration_Type);
441 Set_First_Literal (Standard_Boolean, Standard_False);
442 Set_Etype (Standard_Boolean, Standard_Boolean);
443 Init_Esize (Standard_Boolean, Standard_Character_Size);
444 Init_RM_Size (Standard_Boolean, 1);
445 Set_Elem_Alignment (Standard_Boolean);
446
447 Set_Is_Unsigned_Type (Standard_Boolean);
448 Set_Size_Known_At_Compile_Time (Standard_Boolean);
449
450 Set_Ekind (Standard_True, E_Enumeration_Literal);
451 Set_Etype (Standard_True, Standard_Boolean);
452 Set_Enumeration_Pos (Standard_True, Uint_1);
453 Set_Enumeration_Rep (Standard_True, Uint_1);
454 Set_Is_Known_Valid (Standard_True, True);
455
456 Set_Ekind (Standard_False, E_Enumeration_Literal);
457 Set_Etype (Standard_False, Standard_Boolean);
458 Set_Enumeration_Pos (Standard_False, Uint_0);
459 Set_Enumeration_Rep (Standard_False, Uint_0);
460 Set_Is_Known_Valid (Standard_False, True);
461
462 -- For the bounds of Boolean, we create a range node corresponding to
463
464 -- range False .. True
465
466 -- where the occurrences of the literals must point to the
467 -- corresponding definition.
468
469 R_Node := New_Node (N_Range, Stloc);
470 B_Node := New_Node (N_Identifier, Stloc);
471 Set_Chars (B_Node, Chars (Standard_False));
472 Set_Entity (B_Node, Standard_False);
473 Set_Etype (B_Node, Standard_Boolean);
474 Set_Is_Static_Expression (B_Node);
475 Set_Low_Bound (R_Node, B_Node);
476
477 B_Node := New_Node (N_Identifier, Stloc);
478 Set_Chars (B_Node, Chars (Standard_True));
479 Set_Entity (B_Node, Standard_True);
480 Set_Etype (B_Node, Standard_Boolean);
481 Set_Is_Static_Expression (B_Node);
482 Set_High_Bound (R_Node, B_Node);
483
484 Set_Scalar_Range (Standard_Boolean, R_Node);
485 Set_Etype (R_Node, Standard_Boolean);
486 Set_Parent (R_Node, Standard_Boolean);
487
488 -- Record entity identifiers for boolean literals in the
489 -- Boolean_Literals array, for easy reference during expansion.
490
491 Boolean_Literals := (False => Standard_False, True => Standard_True);
492
493 -- Create type definition nodes for predefined integer types
494
495 Build_Signed_Integer_Type
496 (Standard_Short_Short_Integer, Standard_Short_Short_Integer_Size);
497
498 Build_Signed_Integer_Type
499 (Standard_Short_Integer, Standard_Short_Integer_Size);
500
501 Build_Signed_Integer_Type
502 (Standard_Integer, Standard_Integer_Size);
503
504 declare
505 LIS : Nat;
506 begin
507 if Debug_Flag_M then
508 LIS := 64;
509 else
510 LIS := Standard_Long_Integer_Size;
511 end if;
512
513 Build_Signed_Integer_Type (Standard_Long_Integer, LIS);
514 end;
515
516 Build_Signed_Integer_Type
517 (Standard_Long_Long_Integer, Standard_Long_Long_Integer_Size);
518
519 Create_Unconstrained_Base_Type
520 (Standard_Short_Short_Integer, E_Signed_Integer_Subtype);
521
522 Create_Unconstrained_Base_Type
523 (Standard_Short_Integer, E_Signed_Integer_Subtype);
524
525 Create_Unconstrained_Base_Type
526 (Standard_Integer, E_Signed_Integer_Subtype);
527
528 Create_Unconstrained_Base_Type
529 (Standard_Long_Integer, E_Signed_Integer_Subtype);
530
531 Create_Unconstrained_Base_Type
532 (Standard_Long_Long_Integer, E_Signed_Integer_Subtype);
533
534 -- Create type definition nodes for predefined float types
535
536 Build_Float_Type
537 (Standard_Short_Float,
538 Standard_Short_Float_Size,
539 Standard_Short_Float_Digits);
540
541 Build_Float_Type
542 (Standard_Float,
543 Standard_Float_Size,
544 Standard_Float_Digits);
545
546 Build_Float_Type
547 (Standard_Long_Float,
548 Standard_Long_Float_Size,
549 Standard_Long_Float_Digits);
550
551 Build_Float_Type
552 (Standard_Long_Long_Float,
553 Standard_Long_Long_Float_Size,
554 Standard_Long_Long_Float_Digits);
555
556 -- Create type definition node for type Character. Note that we do not
557 -- set the Literals field, since type Character is handled with special
558 -- routine that do not need a literal list.
559
560 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
561 Set_Type_Definition (Parent (Standard_Character), Tdef_Node);
562
563 Set_Ekind (Standard_Character, E_Enumeration_Type);
564 Set_Etype (Standard_Character, Standard_Character);
565 Init_Esize (Standard_Character, Standard_Character_Size);
566 Init_RM_Size (Standard_Character, 8);
567 Set_Elem_Alignment (Standard_Character);
568
569 Set_Is_Unsigned_Type (Standard_Character);
570 Set_Is_Character_Type (Standard_Character);
571 Set_Is_Known_Valid (Standard_Character);
572 Set_Size_Known_At_Compile_Time (Standard_Character);
573
574 -- Create the bounds for type Character
575
576 R_Node := New_Node (N_Range, Stloc);
577
578 -- Low bound for type Character (Standard.Nul)
579
580 B_Node := New_Node (N_Character_Literal, Stloc);
581 Set_Is_Static_Expression (B_Node);
582 Set_Chars (B_Node, No_Name);
583 Set_Char_Literal_Value (B_Node, Uint_0);
584 Set_Entity (B_Node, Empty);
585 Set_Etype (B_Node, Standard_Character);
586 Set_Low_Bound (R_Node, B_Node);
587
588 -- High bound for type Character
589
590 B_Node := New_Node (N_Character_Literal, Stloc);
591 Set_Is_Static_Expression (B_Node);
592 Set_Chars (B_Node, No_Name);
593 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FF#));
594 Set_Entity (B_Node, Empty);
595 Set_Etype (B_Node, Standard_Character);
596 Set_High_Bound (R_Node, B_Node);
597
598 Set_Scalar_Range (Standard_Character, R_Node);
599 Set_Etype (R_Node, Standard_Character);
600 Set_Parent (R_Node, Standard_Character);
601
602 -- Create type definition for type Wide_Character. Note that we do not
603 -- set the Literals field, since type Wide_Character is handled with
604 -- special routines that do not need a literal list.
605
606 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
607 Set_Type_Definition (Parent (Standard_Wide_Character), Tdef_Node);
608
609 Set_Ekind (Standard_Wide_Character, E_Enumeration_Type);
610 Set_Etype (Standard_Wide_Character, Standard_Wide_Character);
611 Init_Size (Standard_Wide_Character, Standard_Wide_Character_Size);
612
613 Set_Elem_Alignment (Standard_Wide_Character);
614 Set_Is_Unsigned_Type (Standard_Wide_Character);
615 Set_Is_Character_Type (Standard_Wide_Character);
616 Set_Is_Known_Valid (Standard_Wide_Character);
617 Set_Size_Known_At_Compile_Time (Standard_Wide_Character);
618
619 -- Create the bounds for type Wide_Character
620
621 R_Node := New_Node (N_Range, Stloc);
622
623 -- Low bound for type Wide_Character
624
625 B_Node := New_Node (N_Character_Literal, Stloc);
626 Set_Is_Static_Expression (B_Node);
627 Set_Chars (B_Node, No_Name); -- ???
628 Set_Char_Literal_Value (B_Node, Uint_0);
629 Set_Entity (B_Node, Empty);
630 Set_Etype (B_Node, Standard_Wide_Character);
631 Set_Low_Bound (R_Node, B_Node);
632
633 -- High bound for type Wide_Character
634
635 B_Node := New_Node (N_Character_Literal, Stloc);
636 Set_Is_Static_Expression (B_Node);
637 Set_Chars (B_Node, No_Name); -- ???
638 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FFFF#));
639 Set_Entity (B_Node, Empty);
640 Set_Etype (B_Node, Standard_Wide_Character);
641 Set_High_Bound (R_Node, B_Node);
642
643 Set_Scalar_Range (Standard_Wide_Character, R_Node);
644 Set_Etype (R_Node, Standard_Wide_Character);
645 Set_Parent (R_Node, Standard_Wide_Character);
646
647 -- Create type definition for type Wide_Wide_Character. Note that we
648 -- do not set the Literals field, since type Wide_Wide_Character is
649 -- handled with special routines that do not need a literal list.
650
651 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
652 Set_Type_Definition (Parent (Standard_Wide_Wide_Character), Tdef_Node);
653
654 Set_Ekind (Standard_Wide_Wide_Character, E_Enumeration_Type);
655 Set_Etype (Standard_Wide_Wide_Character,
656 Standard_Wide_Wide_Character);
657 Init_Size (Standard_Wide_Wide_Character,
658 Standard_Wide_Wide_Character_Size);
659
660 Set_Elem_Alignment (Standard_Wide_Wide_Character);
661 Set_Is_Unsigned_Type (Standard_Wide_Wide_Character);
662 Set_Is_Character_Type (Standard_Wide_Wide_Character);
663 Set_Is_Known_Valid (Standard_Wide_Wide_Character);
664 Set_Size_Known_At_Compile_Time (Standard_Wide_Wide_Character);
665 Set_Is_Ada_2005_Only (Standard_Wide_Wide_Character);
666
667 -- Create the bounds for type Wide_Wide_Character
668
669 R_Node := New_Node (N_Range, Stloc);
670
671 -- Low bound for type Wide_Wide_Character
672
673 B_Node := New_Node (N_Character_Literal, Stloc);
674 Set_Is_Static_Expression (B_Node);
675 Set_Chars (B_Node, No_Name); -- ???
676 Set_Char_Literal_Value (B_Node, Uint_0);
677 Set_Entity (B_Node, Empty);
678 Set_Etype (B_Node, Standard_Wide_Wide_Character);
679 Set_Low_Bound (R_Node, B_Node);
680
681 -- High bound for type Wide_Wide_Character
682
683 B_Node := New_Node (N_Character_Literal, Stloc);
684 Set_Is_Static_Expression (B_Node);
685 Set_Chars (B_Node, No_Name); -- ???
686 Set_Char_Literal_Value (B_Node, UI_From_Int (16#7FFF_FFFF#));
687 Set_Entity (B_Node, Empty);
688 Set_Etype (B_Node, Standard_Wide_Wide_Character);
689 Set_High_Bound (R_Node, B_Node);
690
691 Set_Scalar_Range (Standard_Wide_Wide_Character, R_Node);
692 Set_Etype (R_Node, Standard_Wide_Wide_Character);
693 Set_Parent (R_Node, Standard_Wide_Wide_Character);
694
695 -- Create type definition node for type String
696
697 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
698
699 declare
700 CompDef_Node : Node_Id;
701 begin
702 CompDef_Node := New_Node (N_Component_Definition, Stloc);
703 Set_Aliased_Present (CompDef_Node, False);
704 Set_Access_Definition (CompDef_Node, Empty);
705 Set_Subtype_Indication (CompDef_Node, Identifier_For (S_Character));
706 Set_Component_Definition (Tdef_Node, CompDef_Node);
707 end;
708
709 Set_Subtype_Marks (Tdef_Node, New_List);
710 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
711 Set_Type_Definition (Parent (Standard_String), Tdef_Node);
712
713 Set_Ekind (Standard_String, E_String_Type);
714 Set_Etype (Standard_String, Standard_String);
715 Set_Component_Type (Standard_String, Standard_Character);
716 Set_Component_Size (Standard_String, Uint_8);
717 Init_Size_Align (Standard_String);
718 Set_Alignment (Standard_String, Uint_1);
719 Pack_String_Type (Standard_String);
720
721 -- On targets where a storage unit is larger than a byte (such as AAMP),
722 -- pragma Pack has a real effect on the representation of type String,
723 -- and the type must be marked as having a nonstandard representation.
724
725 if System_Storage_Unit > Uint_8 then
726 Set_Has_Non_Standard_Rep (Standard_String);
727 Set_Has_Pragma_Pack (Standard_String);
728 end if;
729
730 -- Set index type of String
731
732 E_Id := First
733 (Subtype_Marks (Type_Definition (Parent (Standard_String))));
734 Set_First_Index (Standard_String, E_Id);
735 Set_Entity (E_Id, Standard_Positive);
736 Set_Etype (E_Id, Standard_Positive);
737
738 -- Create type definition node for type Wide_String
739
740 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
741
742 declare
743 CompDef_Node : Node_Id;
744 begin
745 CompDef_Node := New_Node (N_Component_Definition, Stloc);
746 Set_Aliased_Present (CompDef_Node, False);
747 Set_Access_Definition (CompDef_Node, Empty);
748 Set_Subtype_Indication (CompDef_Node,
749 Identifier_For (S_Wide_Character));
750 Set_Component_Definition (Tdef_Node, CompDef_Node);
751 end;
752
753 Set_Subtype_Marks (Tdef_Node, New_List);
754 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
755 Set_Type_Definition (Parent (Standard_Wide_String), Tdef_Node);
756
757 Set_Ekind (Standard_Wide_String, E_String_Type);
758 Set_Etype (Standard_Wide_String, Standard_Wide_String);
759 Set_Component_Type (Standard_Wide_String, Standard_Wide_Character);
760 Set_Component_Size (Standard_Wide_String, Uint_16);
761 Init_Size_Align (Standard_Wide_String);
762 Pack_String_Type (Standard_Wide_String);
763
764 -- Set index type of Wide_String
765
766 E_Id := First
767 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_String))));
768 Set_First_Index (Standard_Wide_String, E_Id);
769 Set_Entity (E_Id, Standard_Positive);
770 Set_Etype (E_Id, Standard_Positive);
771
772 -- Create type definition node for type Wide_Wide_String
773
774 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
775
776 declare
777 CompDef_Node : Node_Id;
778 begin
779 CompDef_Node := New_Node (N_Component_Definition, Stloc);
780 Set_Aliased_Present (CompDef_Node, False);
781 Set_Access_Definition (CompDef_Node, Empty);
782 Set_Subtype_Indication (CompDef_Node,
783 Identifier_For (S_Wide_Wide_Character));
784 Set_Component_Definition (Tdef_Node, CompDef_Node);
785 end;
786
787 Set_Subtype_Marks (Tdef_Node, New_List);
788 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
789 Set_Type_Definition (Parent (Standard_Wide_Wide_String), Tdef_Node);
790
791 Set_Ekind (Standard_Wide_Wide_String, E_String_Type);
792 Set_Etype (Standard_Wide_Wide_String,
793 Standard_Wide_Wide_String);
794 Set_Component_Type (Standard_Wide_Wide_String,
795 Standard_Wide_Wide_Character);
796 Set_Component_Size (Standard_Wide_Wide_String, Uint_32);
797 Init_Size_Align (Standard_Wide_Wide_String);
798 Set_Is_Ada_2005_Only (Standard_Wide_Wide_String);
799 Pack_String_Type (Standard_Wide_Wide_String);
800
801 -- Set index type of Wide_Wide_String
802
803 E_Id := First
804 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_Wide_String))));
805 Set_First_Index (Standard_Wide_Wide_String, E_Id);
806 Set_Entity (E_Id, Standard_Positive);
807 Set_Etype (E_Id, Standard_Positive);
808
809 -- Setup entity for Naturalend Create_Standard;
810
811 Set_Ekind (Standard_Natural, E_Signed_Integer_Subtype);
812 Set_Etype (Standard_Natural, Base_Type (Standard_Integer));
813 Init_Esize (Standard_Natural, Standard_Integer_Size);
814 Init_RM_Size (Standard_Natural, Standard_Integer_Size - 1);
815 Set_Elem_Alignment (Standard_Natural);
816 Set_Size_Known_At_Compile_Time
817 (Standard_Natural);
818 Set_Integer_Bounds (Standard_Natural,
819 Typ => Base_Type (Standard_Integer),
820 Lb => Uint_0,
821 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
822 Set_Is_Constrained (Standard_Natural);
823
824 -- Setup entity for Positive
825
826 Set_Ekind (Standard_Positive, E_Signed_Integer_Subtype);
827 Set_Etype (Standard_Positive, Base_Type (Standard_Integer));
828 Init_Esize (Standard_Positive, Standard_Integer_Size);
829 Init_RM_Size (Standard_Positive, Standard_Integer_Size - 1);
830 Set_Elem_Alignment (Standard_Positive);
831
832 Set_Size_Known_At_Compile_Time (Standard_Positive);
833
834 Set_Integer_Bounds (Standard_Positive,
835 Typ => Base_Type (Standard_Integer),
836 Lb => Uint_1,
837 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
838 Set_Is_Constrained (Standard_Positive);
839
840 -- Create declaration for package ASCII
841
842 Decl := New_Node (N_Package_Declaration, Stloc);
843 Append (Decl, Decl_S);
844
845 Pspec := New_Node (N_Package_Specification, Stloc);
846 Set_Specification (Decl, Pspec);
847
848 Set_Defining_Unit_Name (Pspec, Standard_Entity (S_ASCII));
849 Set_Ekind (Standard_Entity (S_ASCII), E_Package);
850 Set_Visible_Declarations (Pspec, Decl_A);
851
852 -- Create control character definitions in package ASCII. Note that
853 -- the character literal entries created here correspond to literal
854 -- values that are impossible in the source, but can be represented
855 -- internally with no difficulties.
856
857 Ccode := 16#00#;
858
859 for S in S_ASCII_Names loop
860 Decl := New_Node (N_Object_Declaration, Staloc);
861 Set_Constant_Present (Decl, True);
862
863 declare
864 A_Char : constant Entity_Id := Standard_Entity (S);
865 Expr_Decl : Node_Id;
866
867 begin
868 Set_Sloc (A_Char, Staloc);
869 Set_Ekind (A_Char, E_Constant);
870 Set_Never_Set_In_Source (A_Char, True);
871 Set_Is_True_Constant (A_Char, True);
872 Set_Etype (A_Char, Standard_Character);
873 Set_Scope (A_Char, Standard_Entity (S_ASCII));
874 Set_Is_Immediately_Visible (A_Char, False);
875 Set_Is_Public (A_Char, True);
876 Set_Is_Known_Valid (A_Char, True);
877
878 Append_Entity (A_Char, Standard_Entity (S_ASCII));
879 Set_Defining_Identifier (Decl, A_Char);
880
881 Set_Object_Definition (Decl, Identifier_For (S_Character));
882 Expr_Decl := New_Node (N_Character_Literal, Staloc);
883 Set_Expression (Decl, Expr_Decl);
884
885 Set_Is_Static_Expression (Expr_Decl);
886 Set_Chars (Expr_Decl, No_Name);
887 Set_Etype (Expr_Decl, Standard_Character);
888 Set_Char_Literal_Value (Expr_Decl, UI_From_Int (Int (Ccode)));
889 end;
890
891 Append (Decl, Decl_A);
892
893 -- Increment character code, dealing with non-contiguities
894
895 Ccode := Ccode + 1;
896
897 if Ccode = 16#20# then
898 Ccode := 16#21#;
899 elsif Ccode = 16#27# then
900 Ccode := 16#3A#;
901 elsif Ccode = 16#3C# then
902 Ccode := 16#3F#;
903 elsif Ccode = 16#41# then
904 Ccode := 16#5B#;
905 end if;
906 end loop;
907
908 -- Create semantic phase entities
909
910 Standard_Void_Type := New_Standard_Entity;
911 Set_Ekind (Standard_Void_Type, E_Void);
912 Set_Etype (Standard_Void_Type, Standard_Void_Type);
913 Set_Scope (Standard_Void_Type, Standard_Standard);
914 Make_Name (Standard_Void_Type, "_void_type");
915
916 -- The type field of packages is set to void
917
918 Set_Etype (Standard_Standard, Standard_Void_Type);
919 Set_Etype (Standard_ASCII, Standard_Void_Type);
920
921 -- Standard_A_String is actually used in generated code, so it has a
922 -- type name that is reasonable, but does not overlap any Ada name.
923
924 Standard_A_String := New_Standard_Entity;
925 Set_Ekind (Standard_A_String, E_Access_Type);
926 Set_Scope (Standard_A_String, Standard_Standard);
927 Set_Etype (Standard_A_String, Standard_A_String);
928
929 if Debug_Flag_6 then
930 Init_Size (Standard_A_String, System_Address_Size);
931 else
932 Init_Size (Standard_A_String, System_Address_Size * 2);
933 end if;
934
935 Init_Alignment (Standard_A_String);
936
937 Set_Directly_Designated_Type
938 (Standard_A_String, Standard_String);
939 Make_Name (Standard_A_String, "access_string");
940
941 Standard_A_Char := New_Standard_Entity;
942 Set_Ekind (Standard_A_Char, E_Access_Type);
943 Set_Scope (Standard_A_Char, Standard_Standard);
944 Set_Etype (Standard_A_Char, Standard_A_String);
945 Init_Size (Standard_A_Char, System_Address_Size);
946 Set_Elem_Alignment (Standard_A_Char);
947
948 Set_Directly_Designated_Type (Standard_A_Char, Standard_Character);
949 Make_Name (Standard_A_Char, "access_character");
950
951 -- Standard_Debug_Renaming_Type is used for the special objects created
952 -- to encode the names occurring in renaming declarations for use by the
953 -- debugger (see exp_dbug.adb). The type is a zero-sized subtype of
954 -- Standard.Integer.
955
956 Standard_Debug_Renaming_Type := New_Standard_Entity;
957
958 Set_Ekind (Standard_Debug_Renaming_Type, E_Signed_Integer_Subtype);
959 Set_Scope (Standard_Debug_Renaming_Type, Standard_Standard);
960 Set_Etype (Standard_Debug_Renaming_Type, Base_Type (Standard_Integer));
961 Init_Esize (Standard_Debug_Renaming_Type, 0);
962 Init_RM_Size (Standard_Debug_Renaming_Type, 0);
963 Set_Size_Known_At_Compile_Time (Standard_Debug_Renaming_Type);
964 Set_Integer_Bounds (Standard_Debug_Renaming_Type,
965 Typ => Base_Type (Standard_Debug_Renaming_Type),
966 Lb => Uint_1,
967 Hb => Uint_0);
968 Set_Is_Constrained (Standard_Debug_Renaming_Type);
969 Set_Has_Size_Clause (Standard_Debug_Renaming_Type);
970
971 Make_Name (Standard_Debug_Renaming_Type, "_renaming_type");
972
973 -- Note on type names. The type names for the following special types
974 -- are constructed so that they will look reasonable should they ever
975 -- appear in error messages etc, although in practice the use of the
976 -- special insertion character } for types results in special handling
977 -- of these type names in any case. The blanks in these names would
978 -- trouble in Gigi, but that's OK here, since none of these types
979 -- should ever get through to Gigi! Attributes of these types are
980 -- filled out to minimize problems with cascaded errors (for example,
981 -- Any_Integer is given reasonable and consistent type and size values)
982
983 Any_Type := New_Standard_Entity;
984 Decl := New_Node (N_Full_Type_Declaration, Stloc);
985 Set_Defining_Identifier (Decl, Any_Type);
986 Set_Scope (Any_Type, Standard_Standard);
987 Build_Signed_Integer_Type (Any_Type, Standard_Integer_Size);
988 Make_Name (Any_Type, "any type");
989
990 Any_Id := New_Standard_Entity;
991 Set_Ekind (Any_Id, E_Variable);
992 Set_Scope (Any_Id, Standard_Standard);
993 Set_Etype (Any_Id, Any_Type);
994 Init_Esize (Any_Id);
995 Init_Alignment (Any_Id);
996 Make_Name (Any_Id, "any id");
997
998 Any_Access := New_Standard_Entity;
999 Set_Ekind (Any_Access, E_Access_Type);
1000 Set_Scope (Any_Access, Standard_Standard);
1001 Set_Etype (Any_Access, Any_Access);
1002 Init_Size (Any_Access, System_Address_Size);
1003 Set_Elem_Alignment (Any_Access);
1004 Make_Name (Any_Access, "an access type");
1005
1006 Any_Character := New_Standard_Entity;
1007 Set_Ekind (Any_Character, E_Enumeration_Type);
1008 Set_Scope (Any_Character, Standard_Standard);
1009 Set_Etype (Any_Character, Any_Character);
1010 Set_Is_Unsigned_Type (Any_Character);
1011 Set_Is_Character_Type (Any_Character);
1012 Init_Esize (Any_Character, Standard_Character_Size);
1013 Init_RM_Size (Any_Character, 8);
1014 Set_Elem_Alignment (Any_Character);
1015 Set_Scalar_Range (Any_Character, Scalar_Range (Standard_Character));
1016 Make_Name (Any_Character, "a character type");
1017
1018 Any_Array := New_Standard_Entity;
1019 Set_Ekind (Any_Array, E_String_Type);
1020 Set_Scope (Any_Array, Standard_Standard);
1021 Set_Etype (Any_Array, Any_Array);
1022 Set_Component_Type (Any_Array, Any_Character);
1023 Init_Size_Align (Any_Array);
1024 Make_Name (Any_Array, "an array type");
1025
1026 Any_Boolean := New_Standard_Entity;
1027 Set_Ekind (Any_Boolean, E_Enumeration_Type);
1028 Set_Scope (Any_Boolean, Standard_Standard);
1029 Set_Etype (Any_Boolean, Standard_Boolean);
1030 Init_Esize (Any_Boolean, Standard_Character_Size);
1031 Init_RM_Size (Any_Boolean, 1);
1032 Set_Elem_Alignment (Any_Boolean);
1033 Set_Is_Unsigned_Type (Any_Boolean);
1034 Set_Scalar_Range (Any_Boolean, Scalar_Range (Standard_Boolean));
1035 Make_Name (Any_Boolean, "a boolean type");
1036
1037 Any_Composite := New_Standard_Entity;
1038 Set_Ekind (Any_Composite, E_Array_Type);
1039 Set_Scope (Any_Composite, Standard_Standard);
1040 Set_Etype (Any_Composite, Any_Composite);
1041 Set_Component_Size (Any_Composite, Uint_0);
1042 Set_Component_Type (Any_Composite, Standard_Integer);
1043 Init_Size_Align (Any_Composite);
1044 Make_Name (Any_Composite, "a composite type");
1045
1046 Any_Discrete := New_Standard_Entity;
1047 Set_Ekind (Any_Discrete, E_Signed_Integer_Type);
1048 Set_Scope (Any_Discrete, Standard_Standard);
1049 Set_Etype (Any_Discrete, Any_Discrete);
1050 Init_Size (Any_Discrete, Standard_Integer_Size);
1051 Set_Elem_Alignment (Any_Discrete);
1052 Make_Name (Any_Discrete, "a discrete type");
1053
1054 Any_Fixed := New_Standard_Entity;
1055 Set_Ekind (Any_Fixed, E_Ordinary_Fixed_Point_Type);
1056 Set_Scope (Any_Fixed, Standard_Standard);
1057 Set_Etype (Any_Fixed, Any_Fixed);
1058 Init_Size (Any_Fixed, Standard_Integer_Size);
1059 Set_Elem_Alignment (Any_Fixed);
1060 Make_Name (Any_Fixed, "a fixed-point type");
1061
1062 Any_Integer := New_Standard_Entity;
1063 Set_Ekind (Any_Integer, E_Signed_Integer_Type);
1064 Set_Scope (Any_Integer, Standard_Standard);
1065 Set_Etype (Any_Integer, Standard_Long_Long_Integer);
1066 Init_Size (Any_Integer, Standard_Long_Long_Integer_Size);
1067 Set_Elem_Alignment (Any_Integer);
1068
1069 Set_Integer_Bounds
1070 (Any_Integer,
1071 Typ => Base_Type (Standard_Integer),
1072 Lb => Uint_0,
1073 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
1074 Make_Name (Any_Integer, "an integer type");
1075
1076 Any_Modular := New_Standard_Entity;
1077 Set_Ekind (Any_Modular, E_Modular_Integer_Type);
1078 Set_Scope (Any_Modular, Standard_Standard);
1079 Set_Etype (Any_Modular, Standard_Long_Long_Integer);
1080 Init_Size (Any_Modular, Standard_Long_Long_Integer_Size);
1081 Set_Elem_Alignment (Any_Modular);
1082 Set_Is_Unsigned_Type (Any_Modular);
1083 Make_Name (Any_Modular, "a modular type");
1084
1085 Any_Numeric := New_Standard_Entity;
1086 Set_Ekind (Any_Numeric, E_Signed_Integer_Type);
1087 Set_Scope (Any_Numeric, Standard_Standard);
1088 Set_Etype (Any_Numeric, Standard_Long_Long_Integer);
1089 Init_Size (Any_Numeric, Standard_Long_Long_Integer_Size);
1090 Set_Elem_Alignment (Any_Numeric);
1091 Make_Name (Any_Numeric, "a numeric type");
1092
1093 Any_Real := New_Standard_Entity;
1094 Set_Ekind (Any_Real, E_Floating_Point_Type);
1095 Set_Scope (Any_Real, Standard_Standard);
1096 Set_Etype (Any_Real, Standard_Long_Long_Float);
1097 Init_Size (Any_Real, Standard_Long_Long_Float_Size);
1098 Set_Elem_Alignment (Any_Real);
1099 Make_Name (Any_Real, "a real type");
1100
1101 Any_Scalar := New_Standard_Entity;
1102 Set_Ekind (Any_Scalar, E_Signed_Integer_Type);
1103 Set_Scope (Any_Scalar, Standard_Standard);
1104 Set_Etype (Any_Scalar, Any_Scalar);
1105 Init_Size (Any_Scalar, Standard_Integer_Size);
1106 Set_Elem_Alignment (Any_Scalar);
1107 Make_Name (Any_Scalar, "a scalar type");
1108
1109 Any_String := New_Standard_Entity;
1110 Set_Ekind (Any_String, E_String_Type);
1111 Set_Scope (Any_String, Standard_Standard);
1112 Set_Etype (Any_String, Any_String);
1113 Set_Component_Type (Any_String, Any_Character);
1114 Init_Size_Align (Any_String);
1115 Make_Name (Any_String, "a string type");
1116
1117 declare
1118 Index : Node_Id;
1119
1120 begin
1121 Index :=
1122 Make_Range (Stloc,
1123 Low_Bound => Make_Integer (Uint_0),
1124 High_Bound => Make_Integer (Uint_2 ** Standard_Integer_Size));
1125 Set_Etype (Index, Standard_Integer);
1126 Set_First_Index (Any_String, Index);
1127 end;
1128
1129 Standard_Integer_8 := New_Standard_Entity;
1130 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1131 Set_Defining_Identifier (Decl, Standard_Integer_8);
1132 Make_Name (Standard_Integer_8, "integer_8");
1133 Set_Scope (Standard_Integer_8, Standard_Standard);
1134 Build_Signed_Integer_Type (Standard_Integer_8, 8);
1135
1136 Standard_Integer_16 := New_Standard_Entity;
1137 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1138 Set_Defining_Identifier (Decl, Standard_Integer_16);
1139 Make_Name (Standard_Integer_16, "integer_16");
1140 Set_Scope (Standard_Integer_16, Standard_Standard);
1141 Build_Signed_Integer_Type (Standard_Integer_16, 16);
1142
1143 Standard_Integer_32 := New_Standard_Entity;
1144 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1145 Set_Defining_Identifier (Decl, Standard_Integer_32);
1146 Make_Name (Standard_Integer_32, "integer_32");
1147 Set_Scope (Standard_Integer_32, Standard_Standard);
1148 Build_Signed_Integer_Type (Standard_Integer_32, 32);
1149
1150 Standard_Integer_64 := New_Standard_Entity;
1151 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1152 Set_Defining_Identifier (Decl, Standard_Integer_64);
1153 Make_Name (Standard_Integer_64, "integer_64");
1154 Set_Scope (Standard_Integer_64, Standard_Standard);
1155 Build_Signed_Integer_Type (Standard_Integer_64, 64);
1156
1157 Standard_Unsigned := New_Standard_Entity;
1158 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1159 Set_Defining_Identifier (Decl, Standard_Unsigned);
1160 Make_Name (Standard_Unsigned, "unsigned");
1161
1162 Set_Ekind (Standard_Unsigned, E_Modular_Integer_Type);
1163 Set_Scope (Standard_Unsigned, Standard_Standard);
1164 Set_Etype (Standard_Unsigned, Standard_Unsigned);
1165 Init_Size (Standard_Unsigned, Standard_Integer_Size);
1166 Set_Elem_Alignment (Standard_Unsigned);
1167 Set_Modulus (Standard_Unsigned,
1168 Uint_2 ** Standard_Integer_Size);
1169 Set_Is_Unsigned_Type (Standard_Unsigned);
1170 Set_Size_Known_At_Compile_Time
1171 (Standard_Unsigned);
1172 Set_Is_Known_Valid (Standard_Unsigned, True);
1173
1174 R_Node := New_Node (N_Range, Stloc);
1175 Set_Low_Bound (R_Node, Make_Integer (Uint_0));
1176 Set_High_Bound (R_Node, Make_Integer (Modulus (Standard_Unsigned) - 1));
1177 Set_Etype (Low_Bound (R_Node), Standard_Unsigned);
1178 Set_Etype (High_Bound (R_Node), Standard_Unsigned);
1179 Set_Scalar_Range (Standard_Unsigned, R_Node);
1180
1181 -- Note: universal integer and universal real are constructed as fully
1182 -- formed signed numeric types, with parameters corresponding to the
1183 -- longest runtime types (Long_Long_Integer and Long_Long_Float). This
1184 -- allows Gigi to properly process references to universal types that
1185 -- are not folded at compile time.
1186
1187 Universal_Integer := New_Standard_Entity;
1188 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1189 Set_Defining_Identifier (Decl, Universal_Integer);
1190 Make_Name (Universal_Integer, "universal_integer");
1191 Set_Scope (Universal_Integer, Standard_Standard);
1192 Build_Signed_Integer_Type
1193 (Universal_Integer, Standard_Long_Long_Integer_Size);
1194
1195 Universal_Real := New_Standard_Entity;
1196 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1197 Set_Defining_Identifier (Decl, Universal_Real);
1198 Make_Name (Universal_Real, "universal_real");
1199 Set_Scope (Universal_Real, Standard_Standard);
1200 Build_Float_Type
1201 (Universal_Real,
1202 Standard_Long_Long_Float_Size,
1203 Standard_Long_Long_Float_Digits);
1204
1205 -- Note: universal fixed, unlike universal integer and universal real,
1206 -- is never used at runtime, so it does not need to have bounds set.
1207
1208 Universal_Fixed := New_Standard_Entity;
1209 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1210 Set_Defining_Identifier (Decl, Universal_Fixed);
1211 Make_Name (Universal_Fixed, "universal_fixed");
1212 Set_Ekind (Universal_Fixed, E_Ordinary_Fixed_Point_Type);
1213 Set_Etype (Universal_Fixed, Universal_Fixed);
1214 Set_Scope (Universal_Fixed, Standard_Standard);
1215 Init_Size (Universal_Fixed, Standard_Long_Long_Integer_Size);
1216 Set_Elem_Alignment (Universal_Fixed);
1217 Set_Size_Known_At_Compile_Time
1218 (Universal_Fixed);
1219
1220 -- Create type declaration for Duration, using a 64-bit size. The
1221 -- delta and size values depend on the mode set in system.ads.
1222
1223 Build_Duration : declare
1224 Dlo : Uint;
1225 Dhi : Uint;
1226 Delta_Val : Ureal;
1227
1228 begin
1229 -- In 32 bit mode, the size is 32 bits, and the delta and
1230 -- small values are set to 20 milliseconds (20.0**(10.0**(-3)).
1231
1232 if Duration_32_Bits_On_Target then
1233 Dlo := Intval (Type_Low_Bound (Standard_Integer_32));
1234 Dhi := Intval (Type_High_Bound (Standard_Integer_32));
1235 Delta_Val := UR_From_Components (UI_From_Int (20), Uint_3, 10);
1236
1237 -- In standard 64-bit mode, the size is 64-bits and the delta and
1238 -- small values are set to nanoseconds (1.0**(10.0**(-9))
1239
1240 else
1241 Dlo := Intval (Type_Low_Bound (Standard_Integer_64));
1242 Dhi := Intval (Type_High_Bound (Standard_Integer_64));
1243 Delta_Val := UR_From_Components (Uint_1, Uint_9, 10);
1244 end if;
1245
1246 Tdef_Node := Make_Ordinary_Fixed_Point_Definition (Stloc,
1247 Delta_Expression => Make_Real_Literal (Stloc, Delta_Val),
1248 Real_Range_Specification =>
1249 Make_Real_Range_Specification (Stloc,
1250 Low_Bound => Make_Real_Literal (Stloc,
1251 Realval => Dlo * Delta_Val),
1252 High_Bound => Make_Real_Literal (Stloc,
1253 Realval => Dhi * Delta_Val)));
1254
1255 Set_Type_Definition (Parent (Standard_Duration), Tdef_Node);
1256
1257 Set_Ekind (Standard_Duration, E_Ordinary_Fixed_Point_Type);
1258 Set_Etype (Standard_Duration, Standard_Duration);
1259
1260 if Duration_32_Bits_On_Target then
1261 Init_Size (Standard_Duration, 32);
1262 else
1263 Init_Size (Standard_Duration, 64);
1264 end if;
1265
1266 Set_Elem_Alignment (Standard_Duration);
1267 Set_Delta_Value (Standard_Duration, Delta_Val);
1268 Set_Small_Value (Standard_Duration, Delta_Val);
1269 Set_Scalar_Range (Standard_Duration,
1270 Real_Range_Specification
1271 (Type_Definition (Parent (Standard_Duration))));
1272
1273 -- Normally it does not matter that nodes in package Standard are
1274 -- not marked as analyzed. The Scalar_Range of the fixed-point
1275 -- type Standard_Duration is an exception, because of the special
1276 -- test made in Freeze.Freeze_Fixed_Point_Type.
1277
1278 Set_Analyzed (Scalar_Range (Standard_Duration));
1279
1280 Set_Etype (Type_High_Bound (Standard_Duration), Standard_Duration);
1281 Set_Etype (Type_Low_Bound (Standard_Duration), Standard_Duration);
1282
1283 Set_Is_Static_Expression (Type_High_Bound (Standard_Duration));
1284 Set_Is_Static_Expression (Type_Low_Bound (Standard_Duration));
1285
1286 Set_Corresponding_Integer_Value
1287 (Type_High_Bound (Standard_Duration), Dhi);
1288
1289 Set_Corresponding_Integer_Value
1290 (Type_Low_Bound (Standard_Duration), Dlo);
1291
1292 Set_Size_Known_At_Compile_Time (Standard_Duration);
1293 end Build_Duration;
1294
1295 -- Build standard exception type. Note that the type name here is
1296 -- actually used in the generated code, so it must be set correctly
1297
1298 -- ??? Also note that the Import_Code component is now declared
1299 -- as a System.Standard_Library.Exception_Code to enforce run-time
1300 -- library implementation consistency. It's too early here to resort
1301 -- to rtsfind to get the proper node for that type, so we use the
1302 -- closest possible available type node at hand instead. We should
1303 -- probably be fixing this up at some point.
1304
1305 Standard_Exception_Type := New_Standard_Entity;
1306 Set_Ekind (Standard_Exception_Type, E_Record_Type);
1307 Set_Etype (Standard_Exception_Type, Standard_Exception_Type);
1308 Set_Scope (Standard_Exception_Type, Standard_Standard);
1309 Set_Stored_Constraint
1310 (Standard_Exception_Type, No_Elist);
1311 Init_Size_Align (Standard_Exception_Type);
1312 Set_Size_Known_At_Compile_Time
1313 (Standard_Exception_Type, True);
1314 Make_Name (Standard_Exception_Type, "exception");
1315
1316 Make_Component
1317 (Standard_Exception_Type, Standard_Boolean, "Not_Handled_By_Others");
1318 Make_Component
1319 (Standard_Exception_Type, Standard_Character, "Lang");
1320 Make_Component
1321 (Standard_Exception_Type, Standard_Natural, "Name_Length");
1322 Make_Component
1323 (Standard_Exception_Type, Standard_A_Char, "Full_Name");
1324 Make_Component
1325 (Standard_Exception_Type, Standard_A_Char, "HTable_Ptr");
1326 Make_Component
1327 (Standard_Exception_Type, Standard_Unsigned, "Import_Code");
1328 Make_Component
1329 (Standard_Exception_Type, Standard_A_Char, "Raise_Hook");
1330
1331 -- Build tree for record declaration, for use by the back-end
1332
1333 declare
1334 Comp_List : List_Id;
1335 Comp : Entity_Id;
1336
1337 begin
1338 Comp := First_Entity (Standard_Exception_Type);
1339 Comp_List := New_List;
1340 while Present (Comp) loop
1341 Append (
1342 Make_Component_Declaration (Stloc,
1343 Defining_Identifier => Comp,
1344 Component_Definition =>
1345 Make_Component_Definition (Stloc,
1346 Aliased_Present => False,
1347 Subtype_Indication => New_Occurrence_Of (Etype (Comp),
1348 Stloc))),
1349 Comp_List);
1350
1351 Next_Entity (Comp);
1352 end loop;
1353
1354 Decl := Make_Full_Type_Declaration (Stloc,
1355 Defining_Identifier => Standard_Exception_Type,
1356 Type_Definition =>
1357 Make_Record_Definition (Stloc,
1358 End_Label => Empty,
1359 Component_List =>
1360 Make_Component_List (Stloc,
1361 Component_Items => Comp_List)));
1362 end;
1363
1364 Append (Decl, Decl_S);
1365
1366 Layout_Type (Standard_Exception_Type);
1367
1368 -- Create declarations of standard exceptions
1369
1370 Build_Exception (S_Constraint_Error);
1371 Build_Exception (S_Program_Error);
1372 Build_Exception (S_Storage_Error);
1373 Build_Exception (S_Tasking_Error);
1374
1375 -- Numeric_Error is a normal exception in Ada 83, but in Ada 95
1376 -- it is a renaming of Constraint_Error. Is this test too early???
1377
1378 if Ada_Version = Ada_83 then
1379 Build_Exception (S_Numeric_Error);
1380
1381 else
1382 Decl := New_Node (N_Exception_Renaming_Declaration, Stloc);
1383 E_Id := Standard_Entity (S_Numeric_Error);
1384
1385 Set_Ekind (E_Id, E_Exception);
1386 Set_Exception_Code (E_Id, Uint_0);
1387 Set_Etype (E_Id, Standard_Exception_Type);
1388 Set_Is_Public (E_Id);
1389 Set_Renamed_Entity (E_Id, Standard_Entity (S_Constraint_Error));
1390
1391 Set_Defining_Identifier (Decl, E_Id);
1392 Append (Decl, Decl_S);
1393
1394 Ident_Node := New_Node (N_Identifier, Stloc);
1395 Set_Chars (Ident_Node, Chars (Standard_Entity (S_Constraint_Error)));
1396 Set_Entity (Ident_Node, Standard_Entity (S_Constraint_Error));
1397 Set_Name (Decl, Ident_Node);
1398 end if;
1399
1400 -- Abort_Signal is an entity that does not get made visible
1401
1402 Abort_Signal := New_Standard_Entity;
1403 Set_Chars (Abort_Signal, Name_uAbort_Signal);
1404 Set_Ekind (Abort_Signal, E_Exception);
1405 Set_Exception_Code (Abort_Signal, Uint_0);
1406 Set_Etype (Abort_Signal, Standard_Exception_Type);
1407 Set_Scope (Abort_Signal, Standard_Standard);
1408 Set_Is_Public (Abort_Signal, True);
1409 Decl :=
1410 Make_Exception_Declaration (Stloc,
1411 Defining_Identifier => Abort_Signal);
1412
1413 -- Create defining identifiers for shift operator entities. Note
1414 -- that these entities are used only for marking shift operators
1415 -- generated internally, and hence need no structure, just a name
1416 -- and a unique identity.
1417
1418 Standard_Op_Rotate_Left := New_Standard_Entity;
1419 Set_Chars (Standard_Op_Rotate_Left, Name_Rotate_Left);
1420 Set_Ekind (Standard_Op_Rotate_Left, E_Operator);
1421
1422 Standard_Op_Rotate_Right := New_Standard_Entity;
1423 Set_Chars (Standard_Op_Rotate_Right, Name_Rotate_Right);
1424 Set_Ekind (Standard_Op_Rotate_Right, E_Operator);
1425
1426 Standard_Op_Shift_Left := New_Standard_Entity;
1427 Set_Chars (Standard_Op_Shift_Left, Name_Shift_Left);
1428 Set_Ekind (Standard_Op_Shift_Left, E_Operator);
1429
1430 Standard_Op_Shift_Right := New_Standard_Entity;
1431 Set_Chars (Standard_Op_Shift_Right, Name_Shift_Right);
1432 Set_Ekind (Standard_Op_Shift_Right, E_Operator);
1433
1434 Standard_Op_Shift_Right_Arithmetic := New_Standard_Entity;
1435 Set_Chars (Standard_Op_Shift_Right_Arithmetic,
1436 Name_Shift_Right_Arithmetic);
1437 Set_Ekind (Standard_Op_Shift_Right_Arithmetic,
1438 E_Operator);
1439
1440 -- Create standard operator declarations
1441
1442 Create_Operators;
1443
1444 -- Initialize visibility table with entities in Standard
1445
1446 for E in Standard_Entity_Type loop
1447 if Ekind (Standard_Entity (E)) /= E_Operator then
1448 Set_Name_Entity_Id
1449 (Chars (Standard_Entity (E)), Standard_Entity (E));
1450 Set_Homonym (Standard_Entity (E), Empty);
1451 end if;
1452
1453 if E not in S_ASCII_Names then
1454 Set_Scope (Standard_Entity (E), Standard_Standard);
1455 Set_Is_Immediately_Visible (Standard_Entity (E));
1456 end if;
1457 end loop;
1458
1459 -- The predefined package Standard itself does not have a scope;
1460 -- it is the only entity in the system not to have one, and this
1461 -- is what identifies the package to Gigi.
1462
1463 Set_Scope (Standard_Standard, Empty);
1464
1465 -- Set global variables indicating last Id values and version
1466
1467 Last_Standard_Node_Id := Last_Node_Id;
1468 Last_Standard_List_Id := Last_List_Id;
1469
1470 -- The Error node has an Etype of Any_Type to help error recovery
1471
1472 Set_Etype (Error, Any_Type);
1473
1474 -- Print representation of standard if switch set
1475
1476 if Opt.Print_Standard then
1477 Print_Standard;
1478 end if;
1479 end Create_Standard;
1480
1481 ------------------------------------
1482 -- Create_Unconstrained_Base_Type --
1483 ------------------------------------
1484
1485 procedure Create_Unconstrained_Base_Type
1486 (E : Entity_Id;
1487 K : Entity_Kind)
1488 is
1489 New_Ent : constant Entity_Id := New_Copy (E);
1490
1491 begin
1492 Set_Ekind (E, K);
1493 Set_Is_Constrained (E, True);
1494 Set_Is_First_Subtype (E, True);
1495 Set_Etype (E, New_Ent);
1496
1497 Append_Entity (New_Ent, Standard_Standard);
1498 Set_Is_Constrained (New_Ent, False);
1499 Set_Etype (New_Ent, New_Ent);
1500 Set_Is_Known_Valid (New_Ent, True);
1501
1502 if K = E_Signed_Integer_Subtype then
1503 Set_Etype (Low_Bound (Scalar_Range (E)), New_Ent);
1504 Set_Etype (High_Bound (Scalar_Range (E)), New_Ent);
1505 end if;
1506
1507 end Create_Unconstrained_Base_Type;
1508
1509 --------------------
1510 -- Identifier_For --
1511 --------------------
1512
1513 function Identifier_For (S : Standard_Entity_Type) return Node_Id is
1514 Ident_Node : Node_Id;
1515 begin
1516 Ident_Node := New_Node (N_Identifier, Stloc);
1517 Set_Chars (Ident_Node, Chars (Standard_Entity (S)));
1518 return Ident_Node;
1519 end Identifier_For;
1520
1521 --------------------
1522 -- Make_Component --
1523 --------------------
1524
1525 procedure Make_Component
1526 (Rec : Entity_Id;
1527 Typ : Entity_Id;
1528 Nam : String)
1529 is
1530 Id : constant Entity_Id := New_Standard_Entity;
1531
1532 begin
1533 Set_Ekind (Id, E_Component);
1534 Set_Etype (Id, Typ);
1535 Set_Scope (Id, Rec);
1536 Init_Component_Location (Id);
1537
1538 Set_Original_Record_Component (Id, Id);
1539 Make_Name (Id, Nam);
1540 Append_Entity (Id, Rec);
1541 end Make_Component;
1542
1543 -----------------
1544 -- Make_Formal --
1545 -----------------
1546
1547 function Make_Formal
1548 (Typ : Entity_Id;
1549 Formal_Name : String) return Entity_Id
1550 is
1551 Formal : Entity_Id;
1552
1553 begin
1554 Formal := New_Standard_Entity;
1555
1556 Set_Ekind (Formal, E_In_Parameter);
1557 Set_Mechanism (Formal, Default_Mechanism);
1558 Set_Scope (Formal, Standard_Standard);
1559 Set_Etype (Formal, Typ);
1560 Make_Name (Formal, Formal_Name);
1561
1562 return Formal;
1563 end Make_Formal;
1564
1565 ------------------
1566 -- Make_Integer --
1567 ------------------
1568
1569 function Make_Integer (V : Uint) return Node_Id is
1570 N : constant Node_Id := Make_Integer_Literal (Stloc, V);
1571 begin
1572 Set_Is_Static_Expression (N);
1573 return N;
1574 end Make_Integer;
1575
1576 ---------------
1577 -- Make_Name --
1578 ---------------
1579
1580 procedure Make_Name (Id : Entity_Id; Nam : String) is
1581 begin
1582 for J in 1 .. Nam'Length loop
1583 Name_Buffer (J) := Fold_Lower (Nam (Nam'First + (J - 1)));
1584 end loop;
1585
1586 Name_Len := Nam'Length;
1587 Set_Chars (Id, Name_Find);
1588 end Make_Name;
1589
1590 ------------------
1591 -- New_Operator --
1592 ------------------
1593
1594 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id is
1595 Ident_Node : Entity_Id;
1596
1597 begin
1598 Ident_Node := Make_Defining_Identifier (Stloc, Op);
1599
1600 Set_Is_Pure (Ident_Node, True);
1601 Set_Ekind (Ident_Node, E_Operator);
1602 Set_Etype (Ident_Node, Typ);
1603 Set_Scope (Ident_Node, Standard_Standard);
1604 Set_Homonym (Ident_Node, Get_Name_Entity_Id (Op));
1605 Set_Convention (Ident_Node, Convention_Intrinsic);
1606
1607 Set_Is_Immediately_Visible (Ident_Node, True);
1608 Set_Is_Intrinsic_Subprogram (Ident_Node, True);
1609
1610 Set_Name_Entity_Id (Op, Ident_Node);
1611 Append_Entity (Ident_Node, Standard_Standard);
1612 return Ident_Node;
1613 end New_Operator;
1614
1615 -------------------------
1616 -- New_Standard_Entity --
1617 -------------------------
1618
1619 function New_Standard_Entity
1620 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id
1621 is
1622 E : constant Entity_Id := New_Entity (New_Node_Kind, Stloc);
1623
1624 begin
1625 -- All standard entities are Pure and Public
1626
1627 Set_Is_Pure (E);
1628 Set_Is_Public (E);
1629
1630 -- All standard entity names are analyzed manually, and are thus
1631 -- frozen as soon as they are created.
1632
1633 Set_Is_Frozen (E);
1634
1635 -- Set debug information required for all standard types
1636
1637 Set_Needs_Debug_Info (E);
1638
1639 -- All standard entities are built with fully qualified names, so
1640 -- set the flag to prevent an abortive attempt at requalification!
1641
1642 Set_Has_Qualified_Name (E);
1643
1644 -- Return newly created entity to be completed by caller
1645
1646 return E;
1647 end New_Standard_Entity;
1648
1649 --------------------
1650 -- Print_Standard --
1651 --------------------
1652
1653 procedure Print_Standard is
1654
1655 procedure P (Item : String) renames Output.Write_Line;
1656 -- Short-hand, since we do a lot of line writes here!
1657
1658 procedure P_Int_Range (Size : Pos);
1659 -- Prints the range of an integer based on its Size
1660
1661 procedure P_Float_Range (Id : Entity_Id);
1662 -- Prints the bounds range for the given float type entity
1663
1664 -------------------
1665 -- P_Float_Range --
1666 -------------------
1667
1668 procedure P_Float_Range (Id : Entity_Id) is
1669 Digs : constant Nat := UI_To_Int (Digits_Value (Id));
1670
1671 begin
1672 Write_Str (" range ");
1673
1674 if Vax_Float (Id) then
1675 if Digs = VAXFF_Digits then
1676 Write_Str (VAXFF_First'Universal_Literal_String);
1677 Write_Str (" .. ");
1678 Write_Str (VAXFF_Last'Universal_Literal_String);
1679
1680 elsif Digs = VAXDF_Digits then
1681 Write_Str (VAXDF_First'Universal_Literal_String);
1682 Write_Str (" .. ");
1683 Write_Str (VAXDF_Last'Universal_Literal_String);
1684
1685 else
1686 pragma Assert (Digs = VAXGF_Digits);
1687
1688 Write_Str (VAXGF_First'Universal_Literal_String);
1689 Write_Str (" .. ");
1690 Write_Str (VAXGF_Last'Universal_Literal_String);
1691 end if;
1692
1693 elsif Is_AAMP_Float (Id) then
1694 if Digs = AAMPS_Digits then
1695 Write_Str (AAMPS_First'Universal_Literal_String);
1696 Write_Str (" .. ");
1697 Write_Str (AAMPS_Last'Universal_Literal_String);
1698
1699 else
1700 pragma Assert (Digs = AAMPL_Digits);
1701 Write_Str (AAMPL_First'Universal_Literal_String);
1702 Write_Str (" .. ");
1703 Write_Str (AAMPL_Last'Universal_Literal_String);
1704 end if;
1705
1706 elsif Digs = IEEES_Digits then
1707 Write_Str (IEEES_First'Universal_Literal_String);
1708 Write_Str (" .. ");
1709 Write_Str (IEEES_Last'Universal_Literal_String);
1710
1711 elsif Digs = IEEEL_Digits then
1712 Write_Str (IEEEL_First'Universal_Literal_String);
1713 Write_Str (" .. ");
1714 Write_Str (IEEEL_Last'Universal_Literal_String);
1715
1716 else
1717 pragma Assert (Digs = IEEEX_Digits);
1718
1719 Write_Str (IEEEX_First'Universal_Literal_String);
1720 Write_Str (" .. ");
1721 Write_Str (IEEEX_Last'Universal_Literal_String);
1722 end if;
1723
1724 Write_Str (";");
1725 Write_Eol;
1726 end P_Float_Range;
1727
1728 -----------------
1729 -- P_Int_Range --
1730 -----------------
1731
1732 procedure P_Int_Range (Size : Pos) is
1733 begin
1734 Write_Str (" is range -(2 **");
1735 Write_Int (Size - 1);
1736 Write_Str (")");
1737 Write_Str (" .. +(2 **");
1738 Write_Int (Size - 1);
1739 Write_Str (" - 1);");
1740 Write_Eol;
1741 end P_Int_Range;
1742
1743 -- Start of processing for Print_Standard
1744
1745 begin
1746 P ("-- Representation of package Standard");
1747 Write_Eol;
1748 P ("-- This is not accurate Ada, since new base types cannot be ");
1749 P ("-- created, but the listing shows the target dependent");
1750 P ("-- characteristics of the Standard types for this compiler");
1751 Write_Eol;
1752
1753 P ("package Standard is");
1754 P ("pragma Pure (Standard);");
1755 Write_Eol;
1756
1757 P (" type Boolean is (False, True);");
1758 P (" for Boolean'Size use 1;");
1759 P (" for Boolean use (False => 0, True => 1);");
1760 Write_Eol;
1761
1762 -- Integer types
1763
1764 Write_Str (" type Integer");
1765 P_Int_Range (Standard_Integer_Size);
1766 Write_Str (" for Integer'Size use ");
1767 Write_Int (Standard_Integer_Size);
1768 P (";");
1769 Write_Eol;
1770
1771 P (" subtype Natural is Integer range 0 .. Integer'Last;");
1772 P (" subtype Positive is Integer range 1 .. Integer'Last;");
1773 Write_Eol;
1774
1775 Write_Str (" type Short_Short_Integer");
1776 P_Int_Range (Standard_Short_Short_Integer_Size);
1777 Write_Str (" for Short_Short_Integer'Size use ");
1778 Write_Int (Standard_Short_Short_Integer_Size);
1779 P (";");
1780 Write_Eol;
1781
1782 Write_Str (" type Short_Integer");
1783 P_Int_Range (Standard_Short_Integer_Size);
1784 Write_Str (" for Short_Integer'Size use ");
1785 Write_Int (Standard_Short_Integer_Size);
1786 P (";");
1787 Write_Eol;
1788
1789 Write_Str (" type Long_Integer");
1790 P_Int_Range (Standard_Long_Integer_Size);
1791 Write_Str (" for Long_Integer'Size use ");
1792 Write_Int (Standard_Long_Integer_Size);
1793 P (";");
1794 Write_Eol;
1795
1796 Write_Str (" type Long_Long_Integer");
1797 P_Int_Range (Standard_Long_Long_Integer_Size);
1798 Write_Str (" for Long_Long_Integer'Size use ");
1799 Write_Int (Standard_Long_Long_Integer_Size);
1800 P (";");
1801 Write_Eol;
1802
1803 -- Floating point types
1804
1805 Write_Str (" type Short_Float is digits ");
1806 Write_Int (Standard_Short_Float_Digits);
1807 Write_Eol;
1808 P_Float_Range (Standard_Short_Float);
1809 Write_Str (" for Short_Float'Size use ");
1810 Write_Int (Standard_Short_Float_Size);
1811 P (";");
1812 Write_Eol;
1813
1814 Write_Str (" type Float is digits ");
1815 Write_Int (Standard_Float_Digits);
1816 Write_Eol;
1817 P_Float_Range (Standard_Float);
1818 Write_Str (" for Float'Size use ");
1819 Write_Int (Standard_Float_Size);
1820 P (";");
1821 Write_Eol;
1822
1823 Write_Str (" type Long_Float is digits ");
1824 Write_Int (Standard_Long_Float_Digits);
1825 Write_Eol;
1826 P_Float_Range (Standard_Long_Float);
1827 Write_Str (" for Long_Float'Size use ");
1828 Write_Int (Standard_Long_Float_Size);
1829 P (";");
1830 Write_Eol;
1831
1832 Write_Str (" type Long_Long_Float is digits ");
1833 Write_Int (Standard_Long_Long_Float_Digits);
1834 Write_Eol;
1835 P_Float_Range (Standard_Long_Long_Float);
1836 Write_Str (" for Long_Long_Float'Size use ");
1837 Write_Int (Standard_Long_Long_Float_Size);
1838 P (";");
1839 Write_Eol;
1840
1841 P (" type Character is (...)");
1842 Write_Str (" for Character'Size use ");
1843 Write_Int (Standard_Character_Size);
1844 P (";");
1845 P (" -- See RM A.1(35) for details of this type");
1846 Write_Eol;
1847
1848 P (" type Wide_Character is (...)");
1849 Write_Str (" for Wide_Character'Size use ");
1850 Write_Int (Standard_Wide_Character_Size);
1851 P (";");
1852 P (" -- See RM A.1(36) for details of this type");
1853 Write_Eol;
1854
1855 P (" type Wide_Wide_Character is (...)");
1856 Write_Str (" for Wide_Wide_Character'Size use ");
1857 Write_Int (Standard_Wide_Wide_Character_Size);
1858 P (";");
1859 P (" -- See RM A.1(36) for details of this type");
1860
1861 P (" type String is array (Positive range <>) of Character;");
1862 P (" pragma Pack (String);");
1863 Write_Eol;
1864
1865 P (" type Wide_String is array (Positive range <>)" &
1866 " of Wide_Character;");
1867 P (" pragma Pack (Wide_String);");
1868 Write_Eol;
1869
1870 P (" type Wide_Wide_String is array (Positive range <>)" &
1871 " of Wide_Wide_Character;");
1872 P (" pragma Pack (Wide_Wide_String);");
1873 Write_Eol;
1874
1875 -- Here it's OK to use the Duration type of the host compiler since
1876 -- the implementation of Duration in GNAT is target independent.
1877
1878 if Duration_32_Bits_On_Target then
1879 P (" type Duration is delta 0.020");
1880 P (" range -((2 ** 31 - 1) * 0.020) ..");
1881 P (" +((2 ** 31 - 1) * 0.020);");
1882 P (" for Duration'Small use 0.020;");
1883 else
1884 P (" type Duration is delta 0.000000001");
1885 P (" range -((2 ** 63 - 1) * 0.000000001) ..");
1886 P (" +((2 ** 63 - 1) * 0.000000001);");
1887 P (" for Duration'Small use 0.000000001;");
1888 end if;
1889
1890 Write_Eol;
1891
1892 P (" Constraint_Error : exception;");
1893 P (" Program_Error : exception;");
1894 P (" Storage_Error : exception;");
1895 P (" Tasking_Error : exception;");
1896 P (" Numeric_Error : exception renames Constraint_Error;");
1897 Write_Eol;
1898
1899 P ("end Standard;");
1900 end Print_Standard;
1901
1902 ----------------------
1903 -- Set_Float_Bounds --
1904 ----------------------
1905
1906 procedure Set_Float_Bounds (Id : Entity_Id) is
1907 L : Node_Id;
1908 -- Low bound of literal value
1909
1910 H : Node_Id;
1911 -- High bound of literal value
1912
1913 R : Node_Id;
1914 -- Range specification
1915
1916 Digs : constant Nat := UI_To_Int (Digits_Value (Id));
1917 -- Digits value, used to select bounds
1918
1919 begin
1920 -- Note: for the call from Cstand to initially create the types in
1921 -- Standard, Vax_Float will always be False. Circuitry in Sem_Vfpt
1922 -- will adjust these types appropriately in the Vax_Float case if
1923 -- a pragma Float_Representation (VAX_Float) is used.
1924
1925 if Vax_Float (Id) then
1926 if Digs = VAXFF_Digits then
1927 L := Real_Convert
1928 (VAXFF_First'Universal_Literal_String);
1929 H := Real_Convert
1930 (VAXFF_Last'Universal_Literal_String);
1931
1932 elsif Digs = VAXDF_Digits then
1933 L := Real_Convert
1934 (VAXDF_First'Universal_Literal_String);
1935 H := Real_Convert
1936 (VAXDF_Last'Universal_Literal_String);
1937
1938 else
1939 pragma Assert (Digs = VAXGF_Digits);
1940
1941 L := Real_Convert
1942 (VAXGF_First'Universal_Literal_String);
1943 H := Real_Convert
1944 (VAXGF_Last'Universal_Literal_String);
1945 end if;
1946
1947 elsif Is_AAMP_Float (Id) then
1948 if Digs = AAMPS_Digits then
1949 L := Real_Convert
1950 (AAMPS_First'Universal_Literal_String);
1951 H := Real_Convert
1952 (AAMPS_Last'Universal_Literal_String);
1953
1954 else
1955 pragma Assert (Digs = AAMPL_Digits);
1956 L := Real_Convert
1957 (AAMPL_First'Universal_Literal_String);
1958 H := Real_Convert
1959 (AAMPL_Last'Universal_Literal_String);
1960 end if;
1961
1962 elsif Digs = IEEES_Digits then
1963 L := Real_Convert
1964 (IEEES_First'Universal_Literal_String);
1965 H := Real_Convert
1966 (IEEES_Last'Universal_Literal_String);
1967
1968 elsif Digs = IEEEL_Digits then
1969 L := Real_Convert
1970 (IEEEL_First'Universal_Literal_String);
1971 H := Real_Convert
1972 (IEEEL_Last'Universal_Literal_String);
1973
1974 else
1975 pragma Assert (Digs = IEEEX_Digits);
1976
1977 L := Real_Convert
1978 (IEEEX_First'Universal_Literal_String);
1979 H := Real_Convert
1980 (IEEEX_Last'Universal_Literal_String);
1981 end if;
1982
1983 Set_Etype (L, Id);
1984 Set_Is_Static_Expression (L);
1985
1986 Set_Etype (H, Id);
1987 Set_Is_Static_Expression (H);
1988
1989 R := New_Node (N_Range, Stloc);
1990 Set_Low_Bound (R, L);
1991 Set_High_Bound (R, H);
1992 Set_Includes_Infinities (R, True);
1993 Set_Scalar_Range (Id, R);
1994 Set_Etype (R, Id);
1995 Set_Parent (R, Id);
1996 end Set_Float_Bounds;
1997
1998 ------------------------
1999 -- Set_Integer_Bounds --
2000 ------------------------
2001
2002 procedure Set_Integer_Bounds
2003 (Id : Entity_Id;
2004 Typ : Entity_Id;
2005 Lb : Uint;
2006 Hb : Uint)
2007 is
2008 L : Node_Id; -- Low bound of literal value
2009 H : Node_Id; -- High bound of literal value
2010 R : Node_Id; -- Range specification
2011
2012 begin
2013 L := Make_Integer (Lb);
2014 H := Make_Integer (Hb);
2015
2016 Set_Etype (L, Typ);
2017 Set_Etype (H, Typ);
2018
2019 R := New_Node (N_Range, Stloc);
2020 Set_Low_Bound (R, L);
2021 Set_High_Bound (R, H);
2022 Set_Scalar_Range (Id, R);
2023 Set_Etype (R, Typ);
2024 Set_Parent (R, Id);
2025 Set_Is_Unsigned_Type (Id, Lb >= 0);
2026 end Set_Integer_Bounds;
2027
2028 end CStand;