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[official-gcc.git] / gcc / ada / cstand.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- C S T A N D --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2013, 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 : Int);
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 Copy_Float_Type (To : Entity_Id; From : Entity_Id);
83 -- Build a floating point type, copying representation details from From.
84 -- This is used to create predefined floating point types based on
85 -- available types in the back end.
86
87 procedure Create_Operators;
88 -- Make entries for each of the predefined operators in Standard
89
90 procedure Create_Unconstrained_Base_Type
91 (E : Entity_Id;
92 K : Entity_Kind);
93 -- The predefined signed integer types are constrained subtypes which
94 -- must have a corresponding unconstrained base type. This type is almost
95 -- useless. The only place it has semantics is Subtypes_Statically_Match.
96 -- Consequently, we arrange for it to be identical apart from the setting
97 -- of the constrained bit. This routine takes an entity E for the Type,
98 -- copies it to estabish the base type, then resets the Ekind of the
99 -- original entity to K (the Ekind for the subtype). The Etype field of
100 -- E is set by the call (to point to the created base type entity), and
101 -- also the Is_Constrained flag of E is set.
102 --
103 -- To understand the exact requirement for this, see RM 3.5.4(11) which
104 -- makes it clear that Integer, for example, is constrained, with the
105 -- constraint bounds matching the bounds of the (unconstrained) base
106 -- type. The point is that Integer and Integer'Base have identical
107 -- bounds, but do not statically match, since a subtype with constraints
108 -- never matches a subtype with no constraints.
109
110 function Find_Back_End_Float_Type (Name : String) return Entity_Id;
111 -- Return the first float type in Back_End_Float_Types with the given name.
112 -- Names of entities in back end types, are either type names of C
113 -- predefined types (all lower case), or mode names (upper case).
114 -- These are not generally valid identifier names.
115
116 function Identifier_For (S : Standard_Entity_Type) return Node_Id;
117 -- Returns an identifier node with the same name as the defining
118 -- identifier corresponding to the given Standard_Entity_Type value
119
120 procedure Make_Component
121 (Rec : Entity_Id;
122 Typ : Entity_Id;
123 Nam : String);
124 -- Build a record component with the given type and name, and append to
125 -- the list of components of Rec.
126
127 function Make_Formal
128 (Typ : Entity_Id;
129 Formal_Name : String) return Entity_Id;
130 -- Construct entity for subprogram formal with given name and type
131
132 function Make_Integer (V : Uint) return Node_Id;
133 -- Builds integer literal with given value
134
135 procedure Make_Name (Id : Entity_Id; Nam : String);
136 -- Make an entry in the names table for Nam, and set as Chars field of Id
137
138 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id;
139 -- Build entity for standard operator with given name and type
140
141 function New_Standard_Entity
142 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id;
143 -- Builds a new entity for Standard
144
145 procedure Print_Standard;
146 -- Print representation of package Standard if switch set
147
148 procedure Register_Float_Type
149 (Name : String;
150 Digs : Positive;
151 Float_Rep : Float_Rep_Kind;
152 Size : Positive;
153 Alignment : Natural);
154 -- Registers a single back end floating-point type (from FPT_Mode_Table in
155 -- Set_Targ). This will create a predefined floating-point base type for
156 -- one of the floating point types reported by the back end, and add it
157 -- to the list of predefined float types. Name is the name of the type
158 -- as a normal format (non-null-terminated) string. Digs is the number of
159 -- digits, which is always non-zero, since non-floating-point types were
160 -- filtered out earlier. Float_Rep indicates the kind of floating-point
161 -- type, and Size and Alignment are the size and alignment in bits.
162
163 procedure Set_Integer_Bounds
164 (Id : Entity_Id;
165 Typ : Entity_Id;
166 Lb : Uint;
167 Hb : Uint);
168 -- Procedure to set bounds for integer type or subtype. Id is the entity
169 -- whose bounds and type are to be set. The Typ parameter is the Etype
170 -- value for the entity (which will be the same as Id for all predefined
171 -- integer base types. The third and fourth parameters are the bounds.
172
173 ----------------------
174 -- Build_Float_Type --
175 ----------------------
176
177 procedure Build_Float_Type
178 (E : Entity_Id;
179 Siz : Int;
180 Rep : Float_Rep_Kind;
181 Digs : Int)
182 is
183 begin
184 Set_Type_Definition (Parent (E),
185 Make_Floating_Point_Definition (Stloc,
186 Digits_Expression => Make_Integer (UI_From_Int (Digs))));
187
188 Set_Ekind (E, E_Floating_Point_Type);
189 Set_Etype (E, E);
190 Set_Float_Rep (E, Rep);
191 Init_Size (E, Siz);
192 Set_Elem_Alignment (E);
193 Init_Digits_Value (E, Digs);
194 Set_Float_Bounds (E);
195 Set_Is_Frozen (E);
196 Set_Is_Public (E);
197 Set_Size_Known_At_Compile_Time (E);
198 end Build_Float_Type;
199
200 ------------------------------
201 -- Find_Back_End_Float_Type --
202 ------------------------------
203
204 function Find_Back_End_Float_Type (Name : String) return Entity_Id is
205 N : Elmt_Id;
206
207 begin
208 N := First_Elmt (Back_End_Float_Types);
209 while Present (N) and then Get_Name_String (Chars (Node (N))) /= Name
210 loop
211 Next_Elmt (N);
212 end loop;
213
214 return Node (N);
215 end Find_Back_End_Float_Type;
216
217 -------------------------------
218 -- Build_Signed_Integer_Type --
219 -------------------------------
220
221 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Int) is
222 U2Siz1 : constant Uint := 2 ** (Siz - 1);
223 Lbound : constant Uint := -U2Siz1;
224 Ubound : constant Uint := U2Siz1 - 1;
225
226 begin
227 Set_Type_Definition (Parent (E),
228 Make_Signed_Integer_Type_Definition (Stloc,
229 Low_Bound => Make_Integer (Lbound),
230 High_Bound => Make_Integer (Ubound)));
231
232 Set_Ekind (E, E_Signed_Integer_Type);
233 Set_Etype (E, E);
234 Init_Size (E, Siz);
235 Set_Elem_Alignment (E);
236 Set_Integer_Bounds (E, E, Lbound, Ubound);
237 Set_Is_Frozen (E);
238 Set_Is_Public (E);
239 Set_Is_Known_Valid (E);
240 Set_Size_Known_At_Compile_Time (E);
241 end Build_Signed_Integer_Type;
242
243 ---------------------
244 -- Copy_Float_Type --
245 ---------------------
246
247 procedure Copy_Float_Type (To : Entity_Id; From : Entity_Id) is
248 begin
249 Build_Float_Type (To, UI_To_Int (Esize (From)), Float_Rep (From),
250 UI_To_Int (Digits_Value (From)));
251 end Copy_Float_Type;
252
253 ----------------------
254 -- Create_Operators --
255 ----------------------
256
257 -- Each operator has an abbreviated signature. The formals have the names
258 -- LEFT and RIGHT. Their types are not actually used for resolution.
259
260 procedure Create_Operators is
261 Op_Node : Entity_Id;
262
263 -- The following tables define the binary and unary operators and their
264 -- corresponding result type.
265
266 Binary_Ops : constant array (S_Binary_Ops) of Name_Id :=
267
268 -- There is one entry here for each binary operator, except for the
269 -- case of concatenation, where there are three entries, one for a
270 -- String result, one for Wide_String, and one for Wide_Wide_String.
271
272 (Name_Op_Add,
273 Name_Op_And,
274 Name_Op_Concat,
275 Name_Op_Concat,
276 Name_Op_Concat,
277 Name_Op_Divide,
278 Name_Op_Eq,
279 Name_Op_Expon,
280 Name_Op_Ge,
281 Name_Op_Gt,
282 Name_Op_Le,
283 Name_Op_Lt,
284 Name_Op_Mod,
285 Name_Op_Multiply,
286 Name_Op_Ne,
287 Name_Op_Or,
288 Name_Op_Rem,
289 Name_Op_Subtract,
290 Name_Op_Xor);
291
292 Bin_Op_Types : constant array (S_Binary_Ops) of Entity_Id :=
293
294 -- This table has the corresponding result types. The entries are
295 -- ordered so they correspond to the Binary_Ops array above.
296
297 (Universal_Integer, -- Add
298 Standard_Boolean, -- And
299 Standard_String, -- Concat (String)
300 Standard_Wide_String, -- Concat (Wide_String)
301 Standard_Wide_Wide_String, -- Concat (Wide_Wide_String)
302 Universal_Integer, -- Divide
303 Standard_Boolean, -- Eq
304 Universal_Integer, -- Expon
305 Standard_Boolean, -- Ge
306 Standard_Boolean, -- Gt
307 Standard_Boolean, -- Le
308 Standard_Boolean, -- Lt
309 Universal_Integer, -- Mod
310 Universal_Integer, -- Multiply
311 Standard_Boolean, -- Ne
312 Standard_Boolean, -- Or
313 Universal_Integer, -- Rem
314 Universal_Integer, -- Subtract
315 Standard_Boolean); -- Xor
316
317 Unary_Ops : constant array (S_Unary_Ops) of Name_Id :=
318
319 -- There is one entry here for each unary operator
320
321 (Name_Op_Abs,
322 Name_Op_Subtract,
323 Name_Op_Not,
324 Name_Op_Add);
325
326 Unary_Op_Types : constant array (S_Unary_Ops) of Entity_Id :=
327
328 -- This table has the corresponding result types. The entries are
329 -- ordered so they correspond to the Unary_Ops array above.
330
331 (Universal_Integer, -- Abs
332 Universal_Integer, -- Subtract
333 Standard_Boolean, -- Not
334 Universal_Integer); -- Add
335
336 begin
337 for J in S_Binary_Ops loop
338 Op_Node := New_Operator (Binary_Ops (J), Bin_Op_Types (J));
339 SE (J) := Op_Node;
340 Append_Entity (Make_Formal (Any_Type, "LEFT"), Op_Node);
341 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
342 end loop;
343
344 for J in S_Unary_Ops loop
345 Op_Node := New_Operator (Unary_Ops (J), Unary_Op_Types (J));
346 SE (J) := Op_Node;
347 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
348 end loop;
349
350 -- For concatenation, we create a separate operator for each
351 -- array type. This simplifies the resolution of the component-
352 -- component concatenation operation. In Standard, we set the types
353 -- of the formals for string, wide [wide]_string, concatenations.
354
355 Set_Etype (First_Entity (Standard_Op_Concat), Standard_String);
356 Set_Etype (Last_Entity (Standard_Op_Concat), Standard_String);
357
358 Set_Etype (First_Entity (Standard_Op_Concatw), Standard_Wide_String);
359 Set_Etype (Last_Entity (Standard_Op_Concatw), Standard_Wide_String);
360
361 Set_Etype (First_Entity (Standard_Op_Concatww),
362 Standard_Wide_Wide_String);
363
364 Set_Etype (Last_Entity (Standard_Op_Concatww),
365 Standard_Wide_Wide_String);
366 end Create_Operators;
367
368 ---------------------
369 -- Create_Standard --
370 ---------------------
371
372 -- The tree for the package Standard is prefixed to all compilations.
373 -- Several entities required by semantic analysis are denoted by global
374 -- variables that are initialized to point to the corresponding occurrences
375 -- in Standard. The visible entities of Standard are created here. Special
376 -- entities maybe created here as well or may be created from the semantics
377 -- module. By not adding them to the Decls list of Standard they will not
378 -- be visible to Ada programs.
379
380 procedure Create_Standard is
381 Decl_S : constant List_Id := New_List;
382 -- List of declarations in Standard
383
384 Decl_A : constant List_Id := New_List;
385 -- List of declarations in ASCII
386
387 Decl : Node_Id;
388 Pspec : Node_Id;
389 Tdef_Node : Node_Id;
390 Ident_Node : Node_Id;
391 Ccode : Char_Code;
392 E_Id : Entity_Id;
393 R_Node : Node_Id;
394 B_Node : Node_Id;
395
396 procedure Build_Exception (S : Standard_Entity_Type);
397 -- Procedure to declare given entity as an exception
398
399 procedure Create_Back_End_Float_Types;
400 -- Initialize the Back_End_Float_Types list by having the back end
401 -- enumerate all available types and building type entities for them.
402
403 procedure Create_Float_Types;
404 -- Creates entities for all predefined floating point types, and
405 -- adds these to the Predefined_Float_Types list in package Standard.
406
407 procedure Pack_String_Type (String_Type : Entity_Id);
408 -- Generate proper tree for pragma Pack that applies to given type, and
409 -- mark type as having the pragma.
410
411 ---------------------
412 -- Build_Exception --
413 ---------------------
414
415 procedure Build_Exception (S : Standard_Entity_Type) is
416 begin
417 Set_Ekind (Standard_Entity (S), E_Exception);
418 Set_Etype (Standard_Entity (S), Standard_Exception_Type);
419 Set_Exception_Code (Standard_Entity (S), Uint_0);
420 Set_Is_Public (Standard_Entity (S), True);
421
422 Decl :=
423 Make_Exception_Declaration (Stloc,
424 Defining_Identifier => Standard_Entity (S));
425 Append (Decl, Decl_S);
426 end Build_Exception;
427
428 ---------------------------------
429 -- Create_Back_End_Float_Types --
430 ---------------------------------
431
432 procedure Create_Back_End_Float_Types is
433 begin
434 for J in 1 .. Num_FPT_Modes loop
435 declare
436 E : FPT_Mode_Entry renames FPT_Mode_Table (J);
437 begin
438 Register_Float_Type
439 (E.NAME.all, E.DIGS, E.FLOAT_REP, E.SIZE, E.ALIGNMENT);
440 end;
441 end loop;
442 end Create_Back_End_Float_Types;
443
444 ------------------------
445 -- Create_Float_Types --
446 ------------------------
447
448 procedure Create_Float_Types is
449 begin
450 -- Create type definition nodes for predefined float types
451
452 Copy_Float_Type
453 (Standard_Short_Float,
454 Find_Back_End_Float_Type ("float"));
455 Set_Is_Implementation_Defined (Standard_Short_Float);
456
457 Copy_Float_Type (Standard_Float, Standard_Short_Float);
458
459 Copy_Float_Type (Standard_Long_Float,
460 Find_Back_End_Float_Type ("double"));
461
462 Predefined_Float_Types := New_Elmt_List;
463 Append_Elmt (Standard_Short_Float, Predefined_Float_Types);
464 Append_Elmt (Standard_Float, Predefined_Float_Types);
465 Append_Elmt (Standard_Long_Float, Predefined_Float_Types);
466
467 -- ??? For now, we don't have a good way to tell the widest float
468 -- type with hardware support. Basically, GCC knows the size of that
469 -- type, but on x86-64 there often are two or three 128-bit types,
470 -- one double extended that has 18 decimal digits, a 128-bit quad
471 -- precision type with 33 digits and possibly a 128-bit decimal float
472 -- type with 34 digits. As a workaround, we define Long_Long_Float as
473 -- C's "long double" if that type exists and has at most 18 digits,
474 -- or otherwise the same as Long_Float.
475
476 declare
477 Max_HW_Digs : constant := 18;
478 -- Maximum hardware digits supported
479
480 LLF : Entity_Id := Find_Back_End_Float_Type ("long double");
481 -- Entity for long double type
482
483 begin
484 if No (LLF) or else Digits_Value (LLF) > Max_HW_Digs then
485 LLF := Standard_Long_Float;
486 end if;
487
488 Set_Is_Implementation_Defined (Standard_Long_Long_Float);
489 Copy_Float_Type (Standard_Long_Long_Float, LLF);
490
491 Append_Elmt (Standard_Long_Long_Float, Predefined_Float_Types);
492 end;
493
494 -- Any other back end types are appended at the end of the list of
495 -- predefined float types, and will only be selected if the none of
496 -- the types in Standard is suitable, or if a specific named type is
497 -- requested through a pragma Import.
498
499 while not Is_Empty_Elmt_List (Back_End_Float_Types) loop
500 declare
501 E : constant Elmt_Id := First_Elmt (Back_End_Float_Types);
502 begin
503 Append_Elmt (Node (E), To => Predefined_Float_Types);
504 Remove_Elmt (Back_End_Float_Types, E);
505 end;
506 end loop;
507 end Create_Float_Types;
508
509 ----------------------
510 -- Pack_String_Type --
511 ----------------------
512
513 procedure Pack_String_Type (String_Type : Entity_Id) is
514 Prag : constant Node_Id :=
515 Make_Pragma (Stloc,
516 Chars => Name_Pack,
517 Pragma_Argument_Associations =>
518 New_List (
519 Make_Pragma_Argument_Association (Stloc,
520 Expression => New_Occurrence_Of (String_Type, Stloc))));
521 begin
522 Append (Prag, Decl_S);
523 Record_Rep_Item (String_Type, Prag);
524 Set_Has_Pragma_Pack (String_Type, True);
525 end Pack_String_Type;
526
527 -- Start of processing for Create_Standard
528
529 begin
530 -- Initialize scanner for internal scans of literals
531
532 Scn.Initialize_Scanner (No_Unit, Internal_Source_File);
533
534 -- First step is to create defining identifiers for each entity
535
536 for S in Standard_Entity_Type loop
537 declare
538 S_Name : constant String := Standard_Entity_Type'Image (S);
539 -- Name of entity (note we skip S_ at the start)
540
541 Ident_Node : Node_Id;
542 -- Defining identifier node
543
544 begin
545 Ident_Node := New_Standard_Entity;
546 Make_Name (Ident_Node, S_Name (3 .. S_Name'Length));
547 Standard_Entity (S) := Ident_Node;
548 end;
549 end loop;
550
551 -- Create package declaration node for package Standard
552
553 Standard_Package_Node := New_Node (N_Package_Declaration, Stloc);
554
555 Pspec := New_Node (N_Package_Specification, Stloc);
556 Set_Specification (Standard_Package_Node, Pspec);
557
558 Set_Defining_Unit_Name (Pspec, Standard_Standard);
559 Set_Visible_Declarations (Pspec, Decl_S);
560
561 Set_Ekind (Standard_Standard, E_Package);
562 Set_Is_Pure (Standard_Standard);
563 Set_Is_Compilation_Unit (Standard_Standard);
564
565 -- Create type/subtype declaration nodes for standard types
566
567 for S in S_Types loop
568
569 -- Subtype declaration case
570
571 if S = S_Natural or else S = S_Positive then
572 Decl := New_Node (N_Subtype_Declaration, Stloc);
573 Set_Subtype_Indication (Decl,
574 New_Occurrence_Of (Standard_Integer, Stloc));
575
576 -- Full type declaration case
577
578 else
579 Decl := New_Node (N_Full_Type_Declaration, Stloc);
580 end if;
581
582 Set_Is_Frozen (Standard_Entity (S));
583 Set_Is_Public (Standard_Entity (S));
584 Set_Defining_Identifier (Decl, Standard_Entity (S));
585 Append (Decl, Decl_S);
586 end loop;
587
588 Create_Back_End_Float_Types;
589
590 -- Create type definition node for type Boolean. The Size is set to
591 -- 1 as required by Ada 95 and current ARG interpretations for Ada/83.
592
593 -- Note: Object_Size of Boolean is 8. This means that we do NOT in
594 -- general know that Boolean variables have valid values, so we do
595 -- not set the Is_Known_Valid flag.
596
597 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
598 Set_Literals (Tdef_Node, New_List);
599 Append (Standard_False, Literals (Tdef_Node));
600 Append (Standard_True, Literals (Tdef_Node));
601 Set_Type_Definition (Parent (Standard_Boolean), Tdef_Node);
602
603 Set_Ekind (Standard_Boolean, E_Enumeration_Type);
604 Set_First_Literal (Standard_Boolean, Standard_False);
605 Set_Etype (Standard_Boolean, Standard_Boolean);
606 Init_Esize (Standard_Boolean, Standard_Character_Size);
607 Init_RM_Size (Standard_Boolean, 1);
608 Set_Elem_Alignment (Standard_Boolean);
609
610 Set_Is_Unsigned_Type (Standard_Boolean);
611 Set_Size_Known_At_Compile_Time (Standard_Boolean);
612 Set_Has_Pragma_Ordered (Standard_Boolean);
613
614 Set_Ekind (Standard_True, E_Enumeration_Literal);
615 Set_Etype (Standard_True, Standard_Boolean);
616 Set_Enumeration_Pos (Standard_True, Uint_1);
617 Set_Enumeration_Rep (Standard_True, Uint_1);
618 Set_Is_Known_Valid (Standard_True, True);
619
620 Set_Ekind (Standard_False, E_Enumeration_Literal);
621 Set_Etype (Standard_False, Standard_Boolean);
622 Set_Enumeration_Pos (Standard_False, Uint_0);
623 Set_Enumeration_Rep (Standard_False, Uint_0);
624 Set_Is_Known_Valid (Standard_False, True);
625
626 -- For the bounds of Boolean, we create a range node corresponding to
627
628 -- range False .. True
629
630 -- where the occurrences of the literals must point to the
631 -- corresponding definition.
632
633 R_Node := New_Node (N_Range, Stloc);
634 B_Node := New_Node (N_Identifier, Stloc);
635 Set_Chars (B_Node, Chars (Standard_False));
636 Set_Entity (B_Node, Standard_False);
637 Set_Etype (B_Node, Standard_Boolean);
638 Set_Is_Static_Expression (B_Node);
639 Set_Low_Bound (R_Node, B_Node);
640
641 B_Node := New_Node (N_Identifier, Stloc);
642 Set_Chars (B_Node, Chars (Standard_True));
643 Set_Entity (B_Node, Standard_True);
644 Set_Etype (B_Node, Standard_Boolean);
645 Set_Is_Static_Expression (B_Node);
646 Set_High_Bound (R_Node, B_Node);
647
648 Set_Scalar_Range (Standard_Boolean, R_Node);
649 Set_Etype (R_Node, Standard_Boolean);
650 Set_Parent (R_Node, Standard_Boolean);
651
652 -- Record entity identifiers for boolean literals in the
653 -- Boolean_Literals array, for easy reference during expansion.
654
655 Boolean_Literals := (False => Standard_False, True => Standard_True);
656
657 -- Create type definition nodes for predefined integer types
658
659 Build_Signed_Integer_Type
660 (Standard_Short_Short_Integer, Standard_Short_Short_Integer_Size);
661
662 Build_Signed_Integer_Type
663 (Standard_Short_Integer, Standard_Short_Integer_Size);
664
665 Build_Signed_Integer_Type
666 (Standard_Integer, Standard_Integer_Size);
667
668 declare
669 LIS : Nat;
670 begin
671 if Debug_Flag_M then
672 LIS := 64;
673 else
674 LIS := Standard_Long_Integer_Size;
675 end if;
676
677 Build_Signed_Integer_Type (Standard_Long_Integer, LIS);
678 end;
679
680 Build_Signed_Integer_Type
681 (Standard_Long_Long_Integer, Standard_Long_Long_Integer_Size);
682 Set_Is_Implementation_Defined (Standard_Long_Long_Integer);
683
684 Create_Unconstrained_Base_Type
685 (Standard_Short_Short_Integer, E_Signed_Integer_Subtype);
686 Set_Is_Implementation_Defined (Standard_Short_Short_Integer);
687
688 Create_Unconstrained_Base_Type
689 (Standard_Short_Integer, E_Signed_Integer_Subtype);
690
691 Create_Unconstrained_Base_Type
692 (Standard_Integer, E_Signed_Integer_Subtype);
693
694 Create_Unconstrained_Base_Type
695 (Standard_Long_Integer, E_Signed_Integer_Subtype);
696
697 Create_Unconstrained_Base_Type
698 (Standard_Long_Long_Integer, E_Signed_Integer_Subtype);
699 Set_Is_Implementation_Defined (Standard_Short_Short_Integer);
700
701 Create_Float_Types;
702
703 -- Create type definition node for type Character. Note that we do not
704 -- set the Literals field, since type Character is handled with special
705 -- routine that do not need a literal list.
706
707 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
708 Set_Type_Definition (Parent (Standard_Character), Tdef_Node);
709
710 Set_Ekind (Standard_Character, E_Enumeration_Type);
711 Set_Etype (Standard_Character, Standard_Character);
712 Init_Esize (Standard_Character, Standard_Character_Size);
713 Init_RM_Size (Standard_Character, 8);
714 Set_Elem_Alignment (Standard_Character);
715
716 Set_Has_Pragma_Ordered (Standard_Character);
717 Set_Is_Unsigned_Type (Standard_Character);
718 Set_Is_Character_Type (Standard_Character);
719 Set_Is_Known_Valid (Standard_Character);
720 Set_Size_Known_At_Compile_Time (Standard_Character);
721
722 -- Create the bounds for type Character
723
724 R_Node := New_Node (N_Range, Stloc);
725
726 -- Low bound for type Character (Standard.Nul)
727
728 B_Node := New_Node (N_Character_Literal, Stloc);
729 Set_Is_Static_Expression (B_Node);
730 Set_Chars (B_Node, No_Name);
731 Set_Char_Literal_Value (B_Node, Uint_0);
732 Set_Entity (B_Node, Empty);
733 Set_Etype (B_Node, Standard_Character);
734 Set_Low_Bound (R_Node, B_Node);
735
736 -- High bound for type Character
737
738 B_Node := New_Node (N_Character_Literal, Stloc);
739 Set_Is_Static_Expression (B_Node);
740 Set_Chars (B_Node, No_Name);
741 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FF#));
742 Set_Entity (B_Node, Empty);
743 Set_Etype (B_Node, Standard_Character);
744 Set_High_Bound (R_Node, B_Node);
745
746 Set_Scalar_Range (Standard_Character, R_Node);
747 Set_Etype (R_Node, Standard_Character);
748 Set_Parent (R_Node, Standard_Character);
749
750 -- Create type definition for type Wide_Character. Note that we do not
751 -- set the Literals field, since type Wide_Character is handled with
752 -- special routines that do not need a literal list.
753
754 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
755 Set_Type_Definition (Parent (Standard_Wide_Character), Tdef_Node);
756
757 Set_Ekind (Standard_Wide_Character, E_Enumeration_Type);
758 Set_Etype (Standard_Wide_Character, Standard_Wide_Character);
759 Init_Size (Standard_Wide_Character, Standard_Wide_Character_Size);
760
761 Set_Elem_Alignment (Standard_Wide_Character);
762 Set_Has_Pragma_Ordered (Standard_Wide_Character);
763 Set_Is_Unsigned_Type (Standard_Wide_Character);
764 Set_Is_Character_Type (Standard_Wide_Character);
765 Set_Is_Known_Valid (Standard_Wide_Character);
766 Set_Size_Known_At_Compile_Time (Standard_Wide_Character);
767
768 -- Create the bounds for type Wide_Character
769
770 R_Node := New_Node (N_Range, Stloc);
771
772 -- Low bound for type Wide_Character
773
774 B_Node := New_Node (N_Character_Literal, Stloc);
775 Set_Is_Static_Expression (B_Node);
776 Set_Chars (B_Node, No_Name); -- ???
777 Set_Char_Literal_Value (B_Node, Uint_0);
778 Set_Entity (B_Node, Empty);
779 Set_Etype (B_Node, Standard_Wide_Character);
780 Set_Low_Bound (R_Node, B_Node);
781
782 -- High bound for type Wide_Character
783
784 B_Node := New_Node (N_Character_Literal, Stloc);
785 Set_Is_Static_Expression (B_Node);
786 Set_Chars (B_Node, No_Name); -- ???
787 Set_Char_Literal_Value (B_Node, UI_From_Int (16#FFFF#));
788 Set_Entity (B_Node, Empty);
789 Set_Etype (B_Node, Standard_Wide_Character);
790 Set_High_Bound (R_Node, B_Node);
791
792 Set_Scalar_Range (Standard_Wide_Character, R_Node);
793 Set_Etype (R_Node, Standard_Wide_Character);
794 Set_Parent (R_Node, Standard_Wide_Character);
795
796 -- Create type definition for type Wide_Wide_Character. Note that we
797 -- do not set the Literals field, since type Wide_Wide_Character is
798 -- handled with special routines that do not need a literal list.
799
800 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
801 Set_Type_Definition (Parent (Standard_Wide_Wide_Character), Tdef_Node);
802
803 Set_Ekind (Standard_Wide_Wide_Character, E_Enumeration_Type);
804 Set_Etype (Standard_Wide_Wide_Character,
805 Standard_Wide_Wide_Character);
806 Init_Size (Standard_Wide_Wide_Character,
807 Standard_Wide_Wide_Character_Size);
808
809 Set_Elem_Alignment (Standard_Wide_Wide_Character);
810 Set_Has_Pragma_Ordered (Standard_Wide_Wide_Character);
811 Set_Is_Unsigned_Type (Standard_Wide_Wide_Character);
812 Set_Is_Character_Type (Standard_Wide_Wide_Character);
813 Set_Is_Known_Valid (Standard_Wide_Wide_Character);
814 Set_Size_Known_At_Compile_Time (Standard_Wide_Wide_Character);
815 Set_Is_Ada_2005_Only (Standard_Wide_Wide_Character);
816
817 -- Create the bounds for type Wide_Wide_Character
818
819 R_Node := New_Node (N_Range, Stloc);
820
821 -- Low bound for type Wide_Wide_Character
822
823 B_Node := New_Node (N_Character_Literal, Stloc);
824 Set_Is_Static_Expression (B_Node);
825 Set_Chars (B_Node, No_Name); -- ???
826 Set_Char_Literal_Value (B_Node, Uint_0);
827 Set_Entity (B_Node, Empty);
828 Set_Etype (B_Node, Standard_Wide_Wide_Character);
829 Set_Low_Bound (R_Node, B_Node);
830
831 -- High bound for type Wide_Wide_Character
832
833 B_Node := New_Node (N_Character_Literal, Stloc);
834 Set_Is_Static_Expression (B_Node);
835 Set_Chars (B_Node, No_Name); -- ???
836 Set_Char_Literal_Value (B_Node, UI_From_Int (16#7FFF_FFFF#));
837 Set_Entity (B_Node, Empty);
838 Set_Etype (B_Node, Standard_Wide_Wide_Character);
839 Set_High_Bound (R_Node, B_Node);
840
841 Set_Scalar_Range (Standard_Wide_Wide_Character, R_Node);
842 Set_Etype (R_Node, Standard_Wide_Wide_Character);
843 Set_Parent (R_Node, Standard_Wide_Wide_Character);
844
845 -- Create type definition node for type String
846
847 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
848
849 declare
850 CompDef_Node : Node_Id;
851 begin
852 CompDef_Node := New_Node (N_Component_Definition, Stloc);
853 Set_Aliased_Present (CompDef_Node, False);
854 Set_Access_Definition (CompDef_Node, Empty);
855 Set_Subtype_Indication (CompDef_Node, Identifier_For (S_Character));
856 Set_Component_Definition (Tdef_Node, CompDef_Node);
857 end;
858
859 Set_Subtype_Marks (Tdef_Node, New_List);
860 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
861 Set_Type_Definition (Parent (Standard_String), Tdef_Node);
862
863 Set_Ekind (Standard_String, E_String_Type);
864 Set_Etype (Standard_String, Standard_String);
865 Set_Component_Type (Standard_String, Standard_Character);
866 Set_Component_Size (Standard_String, Uint_8);
867 Init_Size_Align (Standard_String);
868 Set_Alignment (Standard_String, Uint_1);
869 Pack_String_Type (Standard_String);
870
871 -- On targets where a storage unit is larger than a byte (such as AAMP),
872 -- pragma Pack has a real effect on the representation of type String,
873 -- and the type must be marked as having a nonstandard representation.
874
875 if System_Storage_Unit > Uint_8 then
876 Set_Has_Non_Standard_Rep (Standard_String);
877 Set_Has_Pragma_Pack (Standard_String);
878 end if;
879
880 -- Set index type of String
881
882 E_Id := First
883 (Subtype_Marks (Type_Definition (Parent (Standard_String))));
884 Set_First_Index (Standard_String, E_Id);
885 Set_Entity (E_Id, Standard_Positive);
886 Set_Etype (E_Id, Standard_Positive);
887
888 -- Create type definition node for type Wide_String
889
890 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
891
892 declare
893 CompDef_Node : Node_Id;
894 begin
895 CompDef_Node := New_Node (N_Component_Definition, Stloc);
896 Set_Aliased_Present (CompDef_Node, False);
897 Set_Access_Definition (CompDef_Node, Empty);
898 Set_Subtype_Indication (CompDef_Node,
899 Identifier_For (S_Wide_Character));
900 Set_Component_Definition (Tdef_Node, CompDef_Node);
901 end;
902
903 Set_Subtype_Marks (Tdef_Node, New_List);
904 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
905 Set_Type_Definition (Parent (Standard_Wide_String), Tdef_Node);
906
907 Set_Ekind (Standard_Wide_String, E_String_Type);
908 Set_Etype (Standard_Wide_String, Standard_Wide_String);
909 Set_Component_Type (Standard_Wide_String, Standard_Wide_Character);
910 Set_Component_Size (Standard_Wide_String, Uint_16);
911 Init_Size_Align (Standard_Wide_String);
912 Pack_String_Type (Standard_Wide_String);
913
914 -- Set index type of Wide_String
915
916 E_Id := First
917 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_String))));
918 Set_First_Index (Standard_Wide_String, E_Id);
919 Set_Entity (E_Id, Standard_Positive);
920 Set_Etype (E_Id, Standard_Positive);
921
922 -- Create type definition node for type Wide_Wide_String
923
924 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
925
926 declare
927 CompDef_Node : Node_Id;
928 begin
929 CompDef_Node := New_Node (N_Component_Definition, Stloc);
930 Set_Aliased_Present (CompDef_Node, False);
931 Set_Access_Definition (CompDef_Node, Empty);
932 Set_Subtype_Indication (CompDef_Node,
933 Identifier_For (S_Wide_Wide_Character));
934 Set_Component_Definition (Tdef_Node, CompDef_Node);
935 end;
936
937 Set_Subtype_Marks (Tdef_Node, New_List);
938 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
939 Set_Type_Definition (Parent (Standard_Wide_Wide_String), Tdef_Node);
940
941 Set_Ekind (Standard_Wide_Wide_String, E_String_Type);
942 Set_Etype (Standard_Wide_Wide_String,
943 Standard_Wide_Wide_String);
944 Set_Component_Type (Standard_Wide_Wide_String,
945 Standard_Wide_Wide_Character);
946 Set_Component_Size (Standard_Wide_Wide_String, Uint_32);
947 Init_Size_Align (Standard_Wide_Wide_String);
948 Set_Is_Ada_2005_Only (Standard_Wide_Wide_String);
949 Pack_String_Type (Standard_Wide_Wide_String);
950
951 -- Set index type of Wide_Wide_String
952
953 E_Id := First
954 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_Wide_String))));
955 Set_First_Index (Standard_Wide_Wide_String, E_Id);
956 Set_Entity (E_Id, Standard_Positive);
957 Set_Etype (E_Id, Standard_Positive);
958
959 -- Setup entity for Natural
960
961 Set_Ekind (Standard_Natural, E_Signed_Integer_Subtype);
962 Set_Etype (Standard_Natural, Base_Type (Standard_Integer));
963 Init_Esize (Standard_Natural, Standard_Integer_Size);
964 Init_RM_Size (Standard_Natural, Standard_Integer_Size - 1);
965 Set_Elem_Alignment (Standard_Natural);
966 Set_Size_Known_At_Compile_Time
967 (Standard_Natural);
968 Set_Integer_Bounds (Standard_Natural,
969 Typ => Base_Type (Standard_Integer),
970 Lb => Uint_0,
971 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
972 Set_Is_Constrained (Standard_Natural);
973
974 -- Setup entity for Positive
975
976 Set_Ekind (Standard_Positive, E_Signed_Integer_Subtype);
977 Set_Etype (Standard_Positive, Base_Type (Standard_Integer));
978 Init_Esize (Standard_Positive, Standard_Integer_Size);
979 Init_RM_Size (Standard_Positive, Standard_Integer_Size - 1);
980 Set_Elem_Alignment (Standard_Positive);
981
982 Set_Size_Known_At_Compile_Time (Standard_Positive);
983
984 Set_Integer_Bounds (Standard_Positive,
985 Typ => Base_Type (Standard_Integer),
986 Lb => Uint_1,
987 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
988 Set_Is_Constrained (Standard_Positive);
989
990 -- Create declaration for package ASCII
991
992 Decl := New_Node (N_Package_Declaration, Stloc);
993 Append (Decl, Decl_S);
994
995 Pspec := New_Node (N_Package_Specification, Stloc);
996 Set_Specification (Decl, Pspec);
997
998 Set_Defining_Unit_Name (Pspec, Standard_Entity (S_ASCII));
999 Set_Ekind (Standard_Entity (S_ASCII), E_Package);
1000 Set_Visible_Declarations (Pspec, Decl_A);
1001
1002 -- Create control character definitions in package ASCII. Note that
1003 -- the character literal entries created here correspond to literal
1004 -- values that are impossible in the source, but can be represented
1005 -- internally with no difficulties.
1006
1007 Ccode := 16#00#;
1008
1009 for S in S_ASCII_Names loop
1010 Decl := New_Node (N_Object_Declaration, Staloc);
1011 Set_Constant_Present (Decl, True);
1012
1013 declare
1014 A_Char : constant Entity_Id := Standard_Entity (S);
1015 Expr_Decl : Node_Id;
1016
1017 begin
1018 Set_Sloc (A_Char, Staloc);
1019 Set_Ekind (A_Char, E_Constant);
1020 Set_Never_Set_In_Source (A_Char, True);
1021 Set_Is_True_Constant (A_Char, True);
1022 Set_Etype (A_Char, Standard_Character);
1023 Set_Scope (A_Char, Standard_Entity (S_ASCII));
1024 Set_Is_Immediately_Visible (A_Char, False);
1025 Set_Is_Public (A_Char, True);
1026 Set_Is_Known_Valid (A_Char, True);
1027
1028 Append_Entity (A_Char, Standard_Entity (S_ASCII));
1029 Set_Defining_Identifier (Decl, A_Char);
1030
1031 Set_Object_Definition (Decl, Identifier_For (S_Character));
1032 Expr_Decl := New_Node (N_Character_Literal, Staloc);
1033 Set_Expression (Decl, Expr_Decl);
1034
1035 Set_Is_Static_Expression (Expr_Decl);
1036 Set_Chars (Expr_Decl, No_Name);
1037 Set_Etype (Expr_Decl, Standard_Character);
1038 Set_Char_Literal_Value (Expr_Decl, UI_From_Int (Int (Ccode)));
1039 end;
1040
1041 Append (Decl, Decl_A);
1042
1043 -- Increment character code, dealing with non-contiguities
1044
1045 Ccode := Ccode + 1;
1046
1047 if Ccode = 16#20# then
1048 Ccode := 16#21#;
1049 elsif Ccode = 16#27# then
1050 Ccode := 16#3A#;
1051 elsif Ccode = 16#3C# then
1052 Ccode := 16#3F#;
1053 elsif Ccode = 16#41# then
1054 Ccode := 16#5B#;
1055 end if;
1056 end loop;
1057
1058 -- Create semantic phase entities
1059
1060 Standard_Void_Type := New_Standard_Entity;
1061 Set_Ekind (Standard_Void_Type, E_Void);
1062 Set_Etype (Standard_Void_Type, Standard_Void_Type);
1063 Set_Scope (Standard_Void_Type, Standard_Standard);
1064 Make_Name (Standard_Void_Type, "_void_type");
1065
1066 -- The type field of packages is set to void
1067
1068 Set_Etype (Standard_Standard, Standard_Void_Type);
1069 Set_Etype (Standard_ASCII, Standard_Void_Type);
1070
1071 -- Standard_A_String is actually used in generated code, so it has a
1072 -- type name that is reasonable, but does not overlap any Ada name.
1073
1074 Standard_A_String := New_Standard_Entity;
1075 Set_Ekind (Standard_A_String, E_Access_Type);
1076 Set_Scope (Standard_A_String, Standard_Standard);
1077 Set_Etype (Standard_A_String, Standard_A_String);
1078
1079 if Debug_Flag_6 then
1080 Init_Size (Standard_A_String, System_Address_Size);
1081 else
1082 Init_Size (Standard_A_String, System_Address_Size * 2);
1083 end if;
1084
1085 Init_Alignment (Standard_A_String);
1086
1087 Set_Directly_Designated_Type
1088 (Standard_A_String, Standard_String);
1089 Make_Name (Standard_A_String, "access_string");
1090
1091 Standard_A_Char := New_Standard_Entity;
1092 Set_Ekind (Standard_A_Char, E_Access_Type);
1093 Set_Scope (Standard_A_Char, Standard_Standard);
1094 Set_Etype (Standard_A_Char, Standard_A_String);
1095 Init_Size (Standard_A_Char, System_Address_Size);
1096 Set_Elem_Alignment (Standard_A_Char);
1097
1098 Set_Directly_Designated_Type (Standard_A_Char, Standard_Character);
1099 Make_Name (Standard_A_Char, "access_character");
1100
1101 -- Standard_Debug_Renaming_Type is used for the special objects created
1102 -- to encode the names occurring in renaming declarations for use by the
1103 -- debugger (see exp_dbug.adb). The type is a zero-sized subtype of
1104 -- Standard.Integer.
1105
1106 Standard_Debug_Renaming_Type := New_Standard_Entity;
1107
1108 Set_Ekind (Standard_Debug_Renaming_Type, E_Signed_Integer_Subtype);
1109 Set_Scope (Standard_Debug_Renaming_Type, Standard_Standard);
1110 Set_Etype (Standard_Debug_Renaming_Type, Base_Type (Standard_Integer));
1111 Init_Esize (Standard_Debug_Renaming_Type, 0);
1112 Init_RM_Size (Standard_Debug_Renaming_Type, 0);
1113 Set_Size_Known_At_Compile_Time (Standard_Debug_Renaming_Type);
1114 Set_Integer_Bounds (Standard_Debug_Renaming_Type,
1115 Typ => Base_Type (Standard_Debug_Renaming_Type),
1116 Lb => Uint_1,
1117 Hb => Uint_0);
1118 Set_Is_Constrained (Standard_Debug_Renaming_Type);
1119 Set_Has_Size_Clause (Standard_Debug_Renaming_Type);
1120
1121 Make_Name (Standard_Debug_Renaming_Type, "_renaming_type");
1122
1123 -- Note on type names. The type names for the following special types
1124 -- are constructed so that they will look reasonable should they ever
1125 -- appear in error messages etc, although in practice the use of the
1126 -- special insertion character } for types results in special handling
1127 -- of these type names in any case. The blanks in these names would
1128 -- trouble in Gigi, but that's OK here, since none of these types
1129 -- should ever get through to Gigi! Attributes of these types are
1130 -- filled out to minimize problems with cascaded errors (for example,
1131 -- Any_Integer is given reasonable and consistent type and size values)
1132
1133 Any_Type := New_Standard_Entity;
1134 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1135 Set_Defining_Identifier (Decl, Any_Type);
1136 Set_Scope (Any_Type, Standard_Standard);
1137 Build_Signed_Integer_Type (Any_Type, Standard_Integer_Size);
1138 Make_Name (Any_Type, "any type");
1139
1140 Any_Id := New_Standard_Entity;
1141 Set_Ekind (Any_Id, E_Variable);
1142 Set_Scope (Any_Id, Standard_Standard);
1143 Set_Etype (Any_Id, Any_Type);
1144 Init_Esize (Any_Id);
1145 Init_Alignment (Any_Id);
1146 Make_Name (Any_Id, "any id");
1147
1148 Any_Access := New_Standard_Entity;
1149 Set_Ekind (Any_Access, E_Access_Type);
1150 Set_Scope (Any_Access, Standard_Standard);
1151 Set_Etype (Any_Access, Any_Access);
1152 Init_Size (Any_Access, System_Address_Size);
1153 Set_Elem_Alignment (Any_Access);
1154 Make_Name (Any_Access, "an access type");
1155
1156 Any_Character := New_Standard_Entity;
1157 Set_Ekind (Any_Character, E_Enumeration_Type);
1158 Set_Scope (Any_Character, Standard_Standard);
1159 Set_Etype (Any_Character, Any_Character);
1160 Set_Is_Unsigned_Type (Any_Character);
1161 Set_Is_Character_Type (Any_Character);
1162 Init_Esize (Any_Character, Standard_Character_Size);
1163 Init_RM_Size (Any_Character, 8);
1164 Set_Elem_Alignment (Any_Character);
1165 Set_Scalar_Range (Any_Character, Scalar_Range (Standard_Character));
1166 Make_Name (Any_Character, "a character type");
1167
1168 Any_Array := New_Standard_Entity;
1169 Set_Ekind (Any_Array, E_String_Type);
1170 Set_Scope (Any_Array, Standard_Standard);
1171 Set_Etype (Any_Array, Any_Array);
1172 Set_Component_Type (Any_Array, Any_Character);
1173 Init_Size_Align (Any_Array);
1174 Make_Name (Any_Array, "an array type");
1175
1176 Any_Boolean := New_Standard_Entity;
1177 Set_Ekind (Any_Boolean, E_Enumeration_Type);
1178 Set_Scope (Any_Boolean, Standard_Standard);
1179 Set_Etype (Any_Boolean, Standard_Boolean);
1180 Init_Esize (Any_Boolean, Standard_Character_Size);
1181 Init_RM_Size (Any_Boolean, 1);
1182 Set_Elem_Alignment (Any_Boolean);
1183 Set_Is_Unsigned_Type (Any_Boolean);
1184 Set_Scalar_Range (Any_Boolean, Scalar_Range (Standard_Boolean));
1185 Make_Name (Any_Boolean, "a boolean type");
1186
1187 Any_Composite := New_Standard_Entity;
1188 Set_Ekind (Any_Composite, E_Array_Type);
1189 Set_Scope (Any_Composite, Standard_Standard);
1190 Set_Etype (Any_Composite, Any_Composite);
1191 Set_Component_Size (Any_Composite, Uint_0);
1192 Set_Component_Type (Any_Composite, Standard_Integer);
1193 Init_Size_Align (Any_Composite);
1194 Make_Name (Any_Composite, "a composite type");
1195
1196 Any_Discrete := New_Standard_Entity;
1197 Set_Ekind (Any_Discrete, E_Signed_Integer_Type);
1198 Set_Scope (Any_Discrete, Standard_Standard);
1199 Set_Etype (Any_Discrete, Any_Discrete);
1200 Init_Size (Any_Discrete, Standard_Integer_Size);
1201 Set_Elem_Alignment (Any_Discrete);
1202 Make_Name (Any_Discrete, "a discrete type");
1203
1204 Any_Fixed := New_Standard_Entity;
1205 Set_Ekind (Any_Fixed, E_Ordinary_Fixed_Point_Type);
1206 Set_Scope (Any_Fixed, Standard_Standard);
1207 Set_Etype (Any_Fixed, Any_Fixed);
1208 Init_Size (Any_Fixed, Standard_Integer_Size);
1209 Set_Elem_Alignment (Any_Fixed);
1210 Make_Name (Any_Fixed, "a fixed-point type");
1211
1212 Any_Integer := New_Standard_Entity;
1213 Set_Ekind (Any_Integer, E_Signed_Integer_Type);
1214 Set_Scope (Any_Integer, Standard_Standard);
1215 Set_Etype (Any_Integer, Standard_Long_Long_Integer);
1216 Init_Size (Any_Integer, Standard_Long_Long_Integer_Size);
1217 Set_Elem_Alignment (Any_Integer);
1218
1219 Set_Integer_Bounds
1220 (Any_Integer,
1221 Typ => Base_Type (Standard_Integer),
1222 Lb => Uint_0,
1223 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
1224 Make_Name (Any_Integer, "an integer type");
1225
1226 Any_Modular := New_Standard_Entity;
1227 Set_Ekind (Any_Modular, E_Modular_Integer_Type);
1228 Set_Scope (Any_Modular, Standard_Standard);
1229 Set_Etype (Any_Modular, Standard_Long_Long_Integer);
1230 Init_Size (Any_Modular, Standard_Long_Long_Integer_Size);
1231 Set_Elem_Alignment (Any_Modular);
1232 Set_Is_Unsigned_Type (Any_Modular);
1233 Make_Name (Any_Modular, "a modular type");
1234
1235 Any_Numeric := New_Standard_Entity;
1236 Set_Ekind (Any_Numeric, E_Signed_Integer_Type);
1237 Set_Scope (Any_Numeric, Standard_Standard);
1238 Set_Etype (Any_Numeric, Standard_Long_Long_Integer);
1239 Init_Size (Any_Numeric, Standard_Long_Long_Integer_Size);
1240 Set_Elem_Alignment (Any_Numeric);
1241 Make_Name (Any_Numeric, "a numeric type");
1242
1243 Any_Real := New_Standard_Entity;
1244 Set_Ekind (Any_Real, E_Floating_Point_Type);
1245 Set_Scope (Any_Real, Standard_Standard);
1246 Set_Etype (Any_Real, Standard_Long_Long_Float);
1247 Init_Size (Any_Real,
1248 UI_To_Int (Esize (Standard_Long_Long_Float)));
1249 Set_Elem_Alignment (Any_Real);
1250 Make_Name (Any_Real, "a real type");
1251
1252 Any_Scalar := New_Standard_Entity;
1253 Set_Ekind (Any_Scalar, E_Signed_Integer_Type);
1254 Set_Scope (Any_Scalar, Standard_Standard);
1255 Set_Etype (Any_Scalar, Any_Scalar);
1256 Init_Size (Any_Scalar, Standard_Integer_Size);
1257 Set_Elem_Alignment (Any_Scalar);
1258 Make_Name (Any_Scalar, "a scalar type");
1259
1260 Any_String := New_Standard_Entity;
1261 Set_Ekind (Any_String, E_String_Type);
1262 Set_Scope (Any_String, Standard_Standard);
1263 Set_Etype (Any_String, Any_String);
1264 Set_Component_Type (Any_String, Any_Character);
1265 Init_Size_Align (Any_String);
1266 Make_Name (Any_String, "a string type");
1267
1268 declare
1269 Index : Node_Id;
1270
1271 begin
1272 Index :=
1273 Make_Range (Stloc,
1274 Low_Bound => Make_Integer (Uint_0),
1275 High_Bound => Make_Integer (Uint_2 ** Standard_Integer_Size));
1276 Set_Etype (Index, Standard_Integer);
1277 Set_First_Index (Any_String, Index);
1278 end;
1279
1280 Standard_Integer_8 := New_Standard_Entity;
1281 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1282 Set_Defining_Identifier (Decl, Standard_Integer_8);
1283 Make_Name (Standard_Integer_8, "integer_8");
1284 Set_Scope (Standard_Integer_8, Standard_Standard);
1285 Build_Signed_Integer_Type (Standard_Integer_8, 8);
1286
1287 Standard_Integer_16 := New_Standard_Entity;
1288 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1289 Set_Defining_Identifier (Decl, Standard_Integer_16);
1290 Make_Name (Standard_Integer_16, "integer_16");
1291 Set_Scope (Standard_Integer_16, Standard_Standard);
1292 Build_Signed_Integer_Type (Standard_Integer_16, 16);
1293
1294 Standard_Integer_32 := New_Standard_Entity;
1295 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1296 Set_Defining_Identifier (Decl, Standard_Integer_32);
1297 Make_Name (Standard_Integer_32, "integer_32");
1298 Set_Scope (Standard_Integer_32, Standard_Standard);
1299 Build_Signed_Integer_Type (Standard_Integer_32, 32);
1300
1301 Standard_Integer_64 := New_Standard_Entity;
1302 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1303 Set_Defining_Identifier (Decl, Standard_Integer_64);
1304 Make_Name (Standard_Integer_64, "integer_64");
1305 Set_Scope (Standard_Integer_64, Standard_Standard);
1306 Build_Signed_Integer_Type (Standard_Integer_64, 64);
1307
1308 -- Standard_Unsigned is not user visible, but is used internally. It
1309 -- is an unsigned type with the same length as Standard.Integer.
1310
1311 Standard_Unsigned := New_Standard_Entity;
1312 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1313 Set_Defining_Identifier (Decl, Standard_Unsigned);
1314 Make_Name (Standard_Unsigned, "unsigned");
1315
1316 Set_Ekind (Standard_Unsigned, E_Modular_Integer_Type);
1317 Set_Scope (Standard_Unsigned, Standard_Standard);
1318 Set_Etype (Standard_Unsigned, Standard_Unsigned);
1319 Init_Size (Standard_Unsigned, Standard_Integer_Size);
1320 Set_Elem_Alignment (Standard_Unsigned);
1321 Set_Modulus (Standard_Unsigned,
1322 Uint_2 ** Standard_Integer_Size);
1323 Set_Is_Unsigned_Type (Standard_Unsigned);
1324 Set_Size_Known_At_Compile_Time
1325 (Standard_Unsigned);
1326 Set_Is_Known_Valid (Standard_Unsigned, True);
1327
1328 R_Node := New_Node (N_Range, Stloc);
1329 Set_Low_Bound (R_Node, Make_Integer (Uint_0));
1330 Set_High_Bound (R_Node, Make_Integer (Modulus (Standard_Unsigned) - 1));
1331 Set_Etype (Low_Bound (R_Node), Standard_Unsigned);
1332 Set_Etype (High_Bound (R_Node), Standard_Unsigned);
1333 Set_Scalar_Range (Standard_Unsigned, R_Node);
1334
1335 -- Standard_Unsigned_64 is not user visible, but is used internally. It
1336 -- is an unsigned type mod 2**64, 64-bits unsigned, size is 64.
1337
1338 Standard_Unsigned_64 := New_Standard_Entity;
1339 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1340 Set_Defining_Identifier (Decl, Standard_Unsigned_64);
1341 Make_Name (Standard_Unsigned_64, "unsigned_64");
1342
1343 Set_Ekind (Standard_Unsigned_64, E_Modular_Integer_Type);
1344 Set_Scope (Standard_Unsigned_64, Standard_Standard);
1345 Set_Etype (Standard_Unsigned_64, Standard_Unsigned_64);
1346 Init_Size (Standard_Unsigned_64, 64);
1347 Set_Elem_Alignment (Standard_Unsigned_64);
1348 Set_Modulus (Standard_Unsigned_64, Uint_2 ** 64);
1349 Set_Is_Unsigned_Type (Standard_Unsigned_64);
1350 Set_Size_Known_At_Compile_Time
1351 (Standard_Unsigned_64);
1352 Set_Is_Known_Valid (Standard_Unsigned_64, True);
1353
1354 R_Node := New_Node (N_Range, Stloc);
1355 Set_Low_Bound (R_Node, Make_Integer (Uint_0));
1356 Set_High_Bound (R_Node, Make_Integer (Uint_2 ** 64 - 1));
1357 Set_Etype (Low_Bound (R_Node), Standard_Unsigned_64);
1358 Set_Etype (High_Bound (R_Node), Standard_Unsigned_64);
1359 Set_Scalar_Range (Standard_Unsigned_64, R_Node);
1360
1361 -- Note: universal integer and universal real are constructed as fully
1362 -- formed signed numeric types, with parameters corresponding to the
1363 -- longest runtime types (Long_Long_Integer and Long_Long_Float). This
1364 -- allows Gigi to properly process references to universal types that
1365 -- are not folded at compile time.
1366
1367 Universal_Integer := New_Standard_Entity;
1368 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1369 Set_Defining_Identifier (Decl, Universal_Integer);
1370 Make_Name (Universal_Integer, "universal_integer");
1371 Set_Scope (Universal_Integer, Standard_Standard);
1372 Build_Signed_Integer_Type
1373 (Universal_Integer, Standard_Long_Long_Integer_Size);
1374
1375 Universal_Real := New_Standard_Entity;
1376 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1377 Set_Defining_Identifier (Decl, Universal_Real);
1378 Make_Name (Universal_Real, "universal_real");
1379 Set_Scope (Universal_Real, Standard_Standard);
1380 Copy_Float_Type (Universal_Real, Standard_Long_Long_Float);
1381
1382 -- Note: universal fixed, unlike universal integer and universal real,
1383 -- is never used at runtime, so it does not need to have bounds set.
1384
1385 Universal_Fixed := New_Standard_Entity;
1386 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1387 Set_Defining_Identifier (Decl, Universal_Fixed);
1388 Make_Name (Universal_Fixed, "universal_fixed");
1389 Set_Ekind (Universal_Fixed, E_Ordinary_Fixed_Point_Type);
1390 Set_Etype (Universal_Fixed, Universal_Fixed);
1391 Set_Scope (Universal_Fixed, Standard_Standard);
1392 Init_Size (Universal_Fixed, Standard_Long_Long_Integer_Size);
1393 Set_Elem_Alignment (Universal_Fixed);
1394 Set_Size_Known_At_Compile_Time
1395 (Universal_Fixed);
1396
1397 -- Create type declaration for Duration, using a 64-bit size. The
1398 -- delta and size values depend on the mode set in system.ads.
1399
1400 Build_Duration : declare
1401 Dlo : Uint;
1402 Dhi : Uint;
1403 Delta_Val : Ureal;
1404
1405 begin
1406 -- In 32 bit mode, the size is 32 bits, and the delta and
1407 -- small values are set to 20 milliseconds (20.0*(10.0**(-3)).
1408
1409 if Duration_32_Bits_On_Target then
1410 Dlo := Intval (Type_Low_Bound (Standard_Integer_32));
1411 Dhi := Intval (Type_High_Bound (Standard_Integer_32));
1412 Delta_Val := UR_From_Components (UI_From_Int (20), Uint_3, 10);
1413
1414 -- In standard 64-bit mode, the size is 64-bits and the delta and
1415 -- small values are set to nanoseconds (1.0*(10.0**(-9))
1416
1417 else
1418 Dlo := Intval (Type_Low_Bound (Standard_Integer_64));
1419 Dhi := Intval (Type_High_Bound (Standard_Integer_64));
1420 Delta_Val := UR_From_Components (Uint_1, Uint_9, 10);
1421 end if;
1422
1423 Tdef_Node := Make_Ordinary_Fixed_Point_Definition (Stloc,
1424 Delta_Expression => Make_Real_Literal (Stloc, Delta_Val),
1425 Real_Range_Specification =>
1426 Make_Real_Range_Specification (Stloc,
1427 Low_Bound => Make_Real_Literal (Stloc,
1428 Realval => Dlo * Delta_Val),
1429 High_Bound => Make_Real_Literal (Stloc,
1430 Realval => Dhi * Delta_Val)));
1431
1432 Set_Type_Definition (Parent (Standard_Duration), Tdef_Node);
1433
1434 Set_Ekind (Standard_Duration, E_Ordinary_Fixed_Point_Type);
1435 Set_Etype (Standard_Duration, Standard_Duration);
1436
1437 if Duration_32_Bits_On_Target then
1438 Init_Size (Standard_Duration, 32);
1439 else
1440 Init_Size (Standard_Duration, 64);
1441 end if;
1442
1443 Set_Elem_Alignment (Standard_Duration);
1444 Set_Delta_Value (Standard_Duration, Delta_Val);
1445 Set_Small_Value (Standard_Duration, Delta_Val);
1446 Set_Scalar_Range (Standard_Duration,
1447 Real_Range_Specification
1448 (Type_Definition (Parent (Standard_Duration))));
1449
1450 -- Normally it does not matter that nodes in package Standard are
1451 -- not marked as analyzed. The Scalar_Range of the fixed-point type
1452 -- Standard_Duration is an exception, because of the special test
1453 -- made in Freeze.Freeze_Fixed_Point_Type.
1454
1455 Set_Analyzed (Scalar_Range (Standard_Duration));
1456
1457 Set_Etype (Type_High_Bound (Standard_Duration), Standard_Duration);
1458 Set_Etype (Type_Low_Bound (Standard_Duration), Standard_Duration);
1459
1460 Set_Is_Static_Expression (Type_High_Bound (Standard_Duration));
1461 Set_Is_Static_Expression (Type_Low_Bound (Standard_Duration));
1462
1463 Set_Corresponding_Integer_Value
1464 (Type_High_Bound (Standard_Duration), Dhi);
1465
1466 Set_Corresponding_Integer_Value
1467 (Type_Low_Bound (Standard_Duration), Dlo);
1468
1469 Set_Size_Known_At_Compile_Time (Standard_Duration);
1470 end Build_Duration;
1471
1472 -- Build standard exception type. Note that the type name here is
1473 -- actually used in the generated code, so it must be set correctly.
1474 -- The type Standard_Exception_Type must be consistent with the type
1475 -- System.Standard_Library.Exception_Data, as the latter is what is
1476 -- known by the run-time. Components of the record are documented in
1477 -- the declaration in System.Standard_Library.
1478
1479 Standard_Exception_Type := New_Standard_Entity;
1480 Set_Ekind (Standard_Exception_Type, E_Record_Type);
1481 Set_Etype (Standard_Exception_Type, Standard_Exception_Type);
1482 Set_Scope (Standard_Exception_Type, Standard_Standard);
1483 Set_Stored_Constraint
1484 (Standard_Exception_Type, No_Elist);
1485 Init_Size_Align (Standard_Exception_Type);
1486 Set_Size_Known_At_Compile_Time
1487 (Standard_Exception_Type, True);
1488 Make_Name (Standard_Exception_Type, "exception");
1489
1490 Make_Component
1491 (Standard_Exception_Type, Standard_Boolean, "Not_Handled_By_Others");
1492 Make_Component
1493 (Standard_Exception_Type, Standard_Character, "Lang");
1494 Make_Component
1495 (Standard_Exception_Type, Standard_Natural, "Name_Length");
1496 Make_Component
1497 (Standard_Exception_Type, Standard_A_Char, "Full_Name");
1498 Make_Component
1499 (Standard_Exception_Type, Standard_A_Char, "HTable_Ptr");
1500 Make_Component
1501 (Standard_Exception_Type, Standard_A_Char, "Foreign_Data");
1502 Make_Component
1503 (Standard_Exception_Type, Standard_A_Char, "Raise_Hook");
1504
1505 -- Build tree for record declaration, for use by the back-end
1506
1507 declare
1508 Comp_List : List_Id;
1509 Comp : Entity_Id;
1510
1511 begin
1512 Comp := First_Entity (Standard_Exception_Type);
1513 Comp_List := New_List;
1514 while Present (Comp) loop
1515 Append (
1516 Make_Component_Declaration (Stloc,
1517 Defining_Identifier => Comp,
1518 Component_Definition =>
1519 Make_Component_Definition (Stloc,
1520 Aliased_Present => False,
1521 Subtype_Indication => New_Occurrence_Of (Etype (Comp),
1522 Stloc))),
1523 Comp_List);
1524
1525 Next_Entity (Comp);
1526 end loop;
1527
1528 Decl := Make_Full_Type_Declaration (Stloc,
1529 Defining_Identifier => Standard_Exception_Type,
1530 Type_Definition =>
1531 Make_Record_Definition (Stloc,
1532 End_Label => Empty,
1533 Component_List =>
1534 Make_Component_List (Stloc,
1535 Component_Items => Comp_List)));
1536 end;
1537
1538 Append (Decl, Decl_S);
1539
1540 Layout_Type (Standard_Exception_Type);
1541
1542 -- Create declarations of standard exceptions
1543
1544 Build_Exception (S_Constraint_Error);
1545 Build_Exception (S_Program_Error);
1546 Build_Exception (S_Storage_Error);
1547 Build_Exception (S_Tasking_Error);
1548
1549 -- Numeric_Error is a normal exception in Ada 83, but in Ada 95
1550 -- it is a renaming of Constraint_Error. Is this test too early???
1551
1552 if Ada_Version = Ada_83 then
1553 Build_Exception (S_Numeric_Error);
1554
1555 else
1556 Decl := New_Node (N_Exception_Renaming_Declaration, Stloc);
1557 E_Id := Standard_Entity (S_Numeric_Error);
1558
1559 Set_Ekind (E_Id, E_Exception);
1560 Set_Exception_Code (E_Id, Uint_0);
1561 Set_Etype (E_Id, Standard_Exception_Type);
1562 Set_Is_Public (E_Id);
1563 Set_Renamed_Entity (E_Id, Standard_Entity (S_Constraint_Error));
1564
1565 Set_Defining_Identifier (Decl, E_Id);
1566 Append (Decl, Decl_S);
1567
1568 Ident_Node := New_Node (N_Identifier, Stloc);
1569 Set_Chars (Ident_Node, Chars (Standard_Entity (S_Constraint_Error)));
1570 Set_Entity (Ident_Node, Standard_Entity (S_Constraint_Error));
1571 Set_Name (Decl, Ident_Node);
1572 end if;
1573
1574 -- Abort_Signal is an entity that does not get made visible
1575
1576 Abort_Signal := New_Standard_Entity;
1577 Set_Chars (Abort_Signal, Name_uAbort_Signal);
1578 Set_Ekind (Abort_Signal, E_Exception);
1579 Set_Exception_Code (Abort_Signal, Uint_0);
1580 Set_Etype (Abort_Signal, Standard_Exception_Type);
1581 Set_Scope (Abort_Signal, Standard_Standard);
1582 Set_Is_Public (Abort_Signal, True);
1583 Decl :=
1584 Make_Exception_Declaration (Stloc,
1585 Defining_Identifier => Abort_Signal);
1586
1587 -- Create defining identifiers for shift operator entities. Note
1588 -- that these entities are used only for marking shift operators
1589 -- generated internally, and hence need no structure, just a name
1590 -- and a unique identity.
1591
1592 Standard_Op_Rotate_Left := New_Standard_Entity;
1593 Set_Chars (Standard_Op_Rotate_Left, Name_Rotate_Left);
1594 Set_Ekind (Standard_Op_Rotate_Left, E_Operator);
1595
1596 Standard_Op_Rotate_Right := New_Standard_Entity;
1597 Set_Chars (Standard_Op_Rotate_Right, Name_Rotate_Right);
1598 Set_Ekind (Standard_Op_Rotate_Right, E_Operator);
1599
1600 Standard_Op_Shift_Left := New_Standard_Entity;
1601 Set_Chars (Standard_Op_Shift_Left, Name_Shift_Left);
1602 Set_Ekind (Standard_Op_Shift_Left, E_Operator);
1603
1604 Standard_Op_Shift_Right := New_Standard_Entity;
1605 Set_Chars (Standard_Op_Shift_Right, Name_Shift_Right);
1606 Set_Ekind (Standard_Op_Shift_Right, E_Operator);
1607
1608 Standard_Op_Shift_Right_Arithmetic := New_Standard_Entity;
1609 Set_Chars (Standard_Op_Shift_Right_Arithmetic,
1610 Name_Shift_Right_Arithmetic);
1611 Set_Ekind (Standard_Op_Shift_Right_Arithmetic,
1612 E_Operator);
1613
1614 -- Create standard operator declarations
1615
1616 Create_Operators;
1617
1618 -- Initialize visibility table with entities in Standard
1619
1620 for E in Standard_Entity_Type loop
1621 if Ekind (Standard_Entity (E)) /= E_Operator then
1622 Set_Name_Entity_Id
1623 (Chars (Standard_Entity (E)), Standard_Entity (E));
1624 Set_Homonym (Standard_Entity (E), Empty);
1625 end if;
1626
1627 if E not in S_ASCII_Names then
1628 Set_Scope (Standard_Entity (E), Standard_Standard);
1629 Set_Is_Immediately_Visible (Standard_Entity (E));
1630 end if;
1631 end loop;
1632
1633 -- The predefined package Standard itself does not have a scope;
1634 -- it is the only entity in the system not to have one, and this
1635 -- is what identifies the package to Gigi.
1636
1637 Set_Scope (Standard_Standard, Empty);
1638
1639 -- Set global variables indicating last Id values and version
1640
1641 Last_Standard_Node_Id := Last_Node_Id;
1642 Last_Standard_List_Id := Last_List_Id;
1643
1644 -- The Error node has an Etype of Any_Type to help error recovery
1645
1646 Set_Etype (Error, Any_Type);
1647
1648 -- Print representation of standard if switch set
1649
1650 if Opt.Print_Standard then
1651 Print_Standard;
1652 end if;
1653 end Create_Standard;
1654
1655 ------------------------------------
1656 -- Create_Unconstrained_Base_Type --
1657 ------------------------------------
1658
1659 procedure Create_Unconstrained_Base_Type
1660 (E : Entity_Id;
1661 K : Entity_Kind)
1662 is
1663 New_Ent : constant Entity_Id := New_Copy (E);
1664
1665 begin
1666 Set_Ekind (E, K);
1667 Set_Is_Constrained (E, True);
1668 Set_Is_First_Subtype (E, True);
1669 Set_Etype (E, New_Ent);
1670
1671 Append_Entity (New_Ent, Standard_Standard);
1672 Set_Is_Constrained (New_Ent, False);
1673 Set_Etype (New_Ent, New_Ent);
1674 Set_Is_Known_Valid (New_Ent, True);
1675
1676 if K = E_Signed_Integer_Subtype then
1677 Set_Etype (Low_Bound (Scalar_Range (E)), New_Ent);
1678 Set_Etype (High_Bound (Scalar_Range (E)), New_Ent);
1679 end if;
1680
1681 end Create_Unconstrained_Base_Type;
1682
1683 --------------------
1684 -- Identifier_For --
1685 --------------------
1686
1687 function Identifier_For (S : Standard_Entity_Type) return Node_Id is
1688 Ident_Node : Node_Id;
1689 begin
1690 Ident_Node := New_Node (N_Identifier, Stloc);
1691 Set_Chars (Ident_Node, Chars (Standard_Entity (S)));
1692 Set_Entity (Ident_Node, Standard_Entity (S));
1693 return Ident_Node;
1694 end Identifier_For;
1695
1696 --------------------
1697 -- Make_Component --
1698 --------------------
1699
1700 procedure Make_Component
1701 (Rec : Entity_Id;
1702 Typ : Entity_Id;
1703 Nam : String)
1704 is
1705 Id : constant Entity_Id := New_Standard_Entity;
1706
1707 begin
1708 Set_Ekind (Id, E_Component);
1709 Set_Etype (Id, Typ);
1710 Set_Scope (Id, Rec);
1711 Init_Component_Location (Id);
1712
1713 Set_Original_Record_Component (Id, Id);
1714 Make_Name (Id, Nam);
1715 Append_Entity (Id, Rec);
1716 end Make_Component;
1717
1718 -----------------
1719 -- Make_Formal --
1720 -----------------
1721
1722 function Make_Formal
1723 (Typ : Entity_Id;
1724 Formal_Name : String) return Entity_Id
1725 is
1726 Formal : Entity_Id;
1727
1728 begin
1729 Formal := New_Standard_Entity;
1730
1731 Set_Ekind (Formal, E_In_Parameter);
1732 Set_Mechanism (Formal, Default_Mechanism);
1733 Set_Scope (Formal, Standard_Standard);
1734 Set_Etype (Formal, Typ);
1735 Make_Name (Formal, Formal_Name);
1736
1737 return Formal;
1738 end Make_Formal;
1739
1740 ------------------
1741 -- Make_Integer --
1742 ------------------
1743
1744 function Make_Integer (V : Uint) return Node_Id is
1745 N : constant Node_Id := Make_Integer_Literal (Stloc, V);
1746 begin
1747 Set_Is_Static_Expression (N);
1748 return N;
1749 end Make_Integer;
1750
1751 ---------------
1752 -- Make_Name --
1753 ---------------
1754
1755 procedure Make_Name (Id : Entity_Id; Nam : String) is
1756 begin
1757 for J in 1 .. Nam'Length loop
1758 Name_Buffer (J) := Fold_Lower (Nam (Nam'First + (J - 1)));
1759 end loop;
1760
1761 Name_Len := Nam'Length;
1762 Set_Chars (Id, Name_Find);
1763 end Make_Name;
1764
1765 ------------------
1766 -- New_Operator --
1767 ------------------
1768
1769 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id is
1770 Ident_Node : Entity_Id;
1771
1772 begin
1773 Ident_Node := Make_Defining_Identifier (Stloc, Op);
1774
1775 Set_Is_Pure (Ident_Node, True);
1776 Set_Ekind (Ident_Node, E_Operator);
1777 Set_Etype (Ident_Node, Typ);
1778 Set_Scope (Ident_Node, Standard_Standard);
1779 Set_Homonym (Ident_Node, Get_Name_Entity_Id (Op));
1780 Set_Convention (Ident_Node, Convention_Intrinsic);
1781
1782 Set_Is_Immediately_Visible (Ident_Node, True);
1783 Set_Is_Intrinsic_Subprogram (Ident_Node, True);
1784
1785 Set_Name_Entity_Id (Op, Ident_Node);
1786 Append_Entity (Ident_Node, Standard_Standard);
1787 return Ident_Node;
1788 end New_Operator;
1789
1790 -------------------------
1791 -- New_Standard_Entity --
1792 -------------------------
1793
1794 function New_Standard_Entity
1795 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id
1796 is
1797 E : constant Entity_Id := New_Entity (New_Node_Kind, Stloc);
1798
1799 begin
1800 -- All standard entities are Pure and Public
1801
1802 Set_Is_Pure (E);
1803 Set_Is_Public (E);
1804
1805 -- All standard entity names are analyzed manually, and are thus
1806 -- frozen as soon as they are created.
1807
1808 Set_Is_Frozen (E);
1809
1810 -- Set debug information required for all standard types
1811
1812 Set_Needs_Debug_Info (E);
1813
1814 -- All standard entities are built with fully qualified names, so
1815 -- set the flag to prevent an abortive attempt at requalification!
1816
1817 Set_Has_Qualified_Name (E);
1818
1819 -- Return newly created entity to be completed by caller
1820
1821 return E;
1822 end New_Standard_Entity;
1823
1824 --------------------
1825 -- Print_Standard --
1826 --------------------
1827
1828 procedure Print_Standard is
1829
1830 procedure P (Item : String) renames Output.Write_Line;
1831 -- Short-hand, since we do a lot of line writes here!
1832
1833 procedure P_Int_Range (Size : Pos);
1834 -- Prints the range of an integer based on its Size
1835
1836 procedure P_Float_Range (Id : Entity_Id);
1837 -- Prints the bounds range for the given float type entity
1838
1839 procedure P_Float_Type (Id : Entity_Id);
1840 -- Prints the type declaration of the given float type entity
1841
1842 procedure P_Mixed_Name (Id : Name_Id);
1843 -- Prints Id in mixed case
1844
1845 -------------------
1846 -- P_Float_Range --
1847 -------------------
1848
1849 procedure P_Float_Range (Id : Entity_Id) is
1850 begin
1851 Write_Str (" range ");
1852 UR_Write (Realval (Type_Low_Bound (Id)));
1853 Write_Str (" .. ");
1854 UR_Write (Realval (Type_High_Bound (Id)));
1855 Write_Str (";");
1856 Write_Eol;
1857 end P_Float_Range;
1858
1859 ------------------
1860 -- P_Float_Type --
1861 ------------------
1862
1863 procedure P_Float_Type (Id : Entity_Id) is
1864 begin
1865 Write_Str (" type ");
1866 P_Mixed_Name (Chars (Id));
1867 Write_Str (" is digits ");
1868 Write_Int (UI_To_Int (Digits_Value (Id)));
1869 Write_Eol;
1870 P_Float_Range (Id);
1871 Write_Str (" for ");
1872 P_Mixed_Name (Chars (Id));
1873 Write_Str ("'Size use ");
1874 Write_Int (UI_To_Int (RM_Size (Id)));
1875 Write_Line (";");
1876 Write_Eol;
1877 end P_Float_Type;
1878
1879 -----------------
1880 -- P_Int_Range --
1881 -----------------
1882
1883 procedure P_Int_Range (Size : Pos) is
1884 begin
1885 Write_Str (" is range -(2 **");
1886 Write_Int (Size - 1);
1887 Write_Str (")");
1888 Write_Str (" .. +(2 **");
1889 Write_Int (Size - 1);
1890 Write_Str (" - 1);");
1891 Write_Eol;
1892 end P_Int_Range;
1893
1894 ------------------
1895 -- P_Mixed_Name --
1896 ------------------
1897
1898 procedure P_Mixed_Name (Id : Name_Id) is
1899 begin
1900 Get_Name_String (Id);
1901
1902 for J in 1 .. Name_Len loop
1903 if J = 1 or else Name_Buffer (J - 1) = '_' then
1904 Name_Buffer (J) := Fold_Upper (Name_Buffer (J));
1905 end if;
1906 end loop;
1907
1908 Write_Str (Name_Buffer (1 .. Name_Len));
1909 end P_Mixed_Name;
1910
1911 -- Start of processing for Print_Standard
1912
1913 begin
1914 P ("-- Representation of package Standard");
1915 Write_Eol;
1916 P ("-- This is not accurate Ada, since new base types cannot be ");
1917 P ("-- created, but the listing shows the target dependent");
1918 P ("-- characteristics of the Standard types for this compiler");
1919 Write_Eol;
1920
1921 P ("package Standard is");
1922 P ("pragma Pure (Standard);");
1923 Write_Eol;
1924
1925 P (" type Boolean is (False, True);");
1926 P (" for Boolean'Size use 1;");
1927 P (" for Boolean use (False => 0, True => 1);");
1928 Write_Eol;
1929
1930 -- Integer types
1931
1932 Write_Str (" type Integer");
1933 P_Int_Range (Standard_Integer_Size);
1934 Write_Str (" for Integer'Size use ");
1935 Write_Int (Standard_Integer_Size);
1936 P (";");
1937 Write_Eol;
1938
1939 P (" subtype Natural is Integer range 0 .. Integer'Last;");
1940 P (" subtype Positive is Integer range 1 .. Integer'Last;");
1941 Write_Eol;
1942
1943 Write_Str (" type Short_Short_Integer");
1944 P_Int_Range (Standard_Short_Short_Integer_Size);
1945 Write_Str (" for Short_Short_Integer'Size use ");
1946 Write_Int (Standard_Short_Short_Integer_Size);
1947 P (";");
1948 Write_Eol;
1949
1950 Write_Str (" type Short_Integer");
1951 P_Int_Range (Standard_Short_Integer_Size);
1952 Write_Str (" for Short_Integer'Size use ");
1953 Write_Int (Standard_Short_Integer_Size);
1954 P (";");
1955 Write_Eol;
1956
1957 Write_Str (" type Long_Integer");
1958 P_Int_Range (Standard_Long_Integer_Size);
1959 Write_Str (" for Long_Integer'Size use ");
1960 Write_Int (Standard_Long_Integer_Size);
1961 P (";");
1962 Write_Eol;
1963
1964 Write_Str (" type Long_Long_Integer");
1965 P_Int_Range (Standard_Long_Long_Integer_Size);
1966 Write_Str (" for Long_Long_Integer'Size use ");
1967 Write_Int (Standard_Long_Long_Integer_Size);
1968 P (";");
1969 Write_Eol;
1970
1971 -- Floating point types
1972
1973 P_Float_Type (Standard_Short_Float);
1974 P_Float_Type (Standard_Float);
1975 P_Float_Type (Standard_Long_Float);
1976 P_Float_Type (Standard_Long_Long_Float);
1977
1978 P (" type Character is (...)");
1979 Write_Str (" for Character'Size use ");
1980 Write_Int (Standard_Character_Size);
1981 P (";");
1982 P (" -- See RM A.1(35) for details of this type");
1983 Write_Eol;
1984
1985 P (" type Wide_Character is (...)");
1986 Write_Str (" for Wide_Character'Size use ");
1987 Write_Int (Standard_Wide_Character_Size);
1988 P (";");
1989 P (" -- See RM A.1(36) for details of this type");
1990 Write_Eol;
1991
1992 P (" type Wide_Wide_Character is (...)");
1993 Write_Str (" for Wide_Wide_Character'Size use ");
1994 Write_Int (Standard_Wide_Wide_Character_Size);
1995 P (";");
1996 P (" -- See RM A.1(36) for details of this type");
1997
1998 P (" type String is array (Positive range <>) of Character;");
1999 P (" pragma Pack (String);");
2000 Write_Eol;
2001
2002 P (" type Wide_String is array (Positive range <>)" &
2003 " of Wide_Character;");
2004 P (" pragma Pack (Wide_String);");
2005 Write_Eol;
2006
2007 P (" type Wide_Wide_String is array (Positive range <>)" &
2008 " of Wide_Wide_Character;");
2009 P (" pragma Pack (Wide_Wide_String);");
2010 Write_Eol;
2011
2012 -- We only have one representation each for 32-bit and 64-bit sizes,
2013 -- so select the right one based on Duration_32_Bits_On_Target.
2014
2015 if Duration_32_Bits_On_Target then
2016 P (" type Duration is delta 0.020");
2017 P (" range -((2 ** 31 - 1) * 0.020) ..");
2018 P (" +((2 ** 31 - 1) * 0.020);");
2019 P (" for Duration'Small use 0.020;");
2020
2021 else
2022 P (" type Duration is delta 0.000000001");
2023 P (" range -((2 ** 63 - 1) * 0.000000001) ..");
2024 P (" +((2 ** 63 - 1) * 0.000000001);");
2025 P (" for Duration'Small use 0.000000001;");
2026 end if;
2027
2028 Write_Eol;
2029
2030 P (" Constraint_Error : exception;");
2031 P (" Program_Error : exception;");
2032 P (" Storage_Error : exception;");
2033 P (" Tasking_Error : exception;");
2034 P (" Numeric_Error : exception renames Constraint_Error;");
2035 Write_Eol;
2036
2037 P ("end Standard;");
2038 end Print_Standard;
2039
2040 -------------------------
2041 -- Register_Float_Type --
2042 -------------------------
2043
2044 procedure Register_Float_Type
2045 (Name : String;
2046 Digs : Positive;
2047 Float_Rep : Float_Rep_Kind;
2048 Size : Positive;
2049 Alignment : Natural)
2050 is
2051 Ent : constant Entity_Id := New_Standard_Entity;
2052 Esize : constant Pos :=
2053 Pos ((Size + Alignment - 1) / Alignment * Alignment);
2054
2055 begin
2056 Set_Defining_Identifier (New_Node (N_Full_Type_Declaration, Stloc), Ent);
2057 Make_Name (Ent, Name);
2058 Set_Scope (Ent, Standard_Standard);
2059 Build_Float_Type (Ent, Esize, Float_Rep, Pos (Digs));
2060 Set_RM_Size (Ent, UI_From_Int (Int (Size)));
2061 Set_Alignment (Ent, UI_From_Int (Int (Alignment / 8)));
2062
2063 if No (Back_End_Float_Types) then
2064 Back_End_Float_Types := New_Elmt_List;
2065 end if;
2066
2067 Append_Elmt (Ent, Back_End_Float_Types);
2068 end Register_Float_Type;
2069
2070 ----------------------
2071 -- Set_Float_Bounds --
2072 ----------------------
2073
2074 procedure Set_Float_Bounds (Id : Entity_Id) is
2075 L : Node_Id;
2076 H : Node_Id;
2077 -- Low and high bounds of literal value
2078
2079 R : Node_Id;
2080 -- Range specification
2081
2082 Radix : constant Uint := Machine_Radix_Value (Id);
2083 Mantissa : constant Uint := Machine_Mantissa_Value (Id);
2084 Emax : constant Uint := Machine_Emax_Value (Id);
2085 Significand : constant Uint := Radix ** Mantissa - 1;
2086 Exponent : constant Uint := Emax - Mantissa;
2087
2088 begin
2089 -- Note: for the call from Cstand to initially create the types in
2090 -- Standard, Float_Rep will never be VAX_Native. Circuitry in Sem_Vfpt
2091 -- will adjust these types appropriately VAX_Native if a pragma
2092 -- Float_Representation (VAX_Float) is used.
2093
2094 H := Make_Float_Literal (Stloc, Radix, Significand, Exponent);
2095 L := Make_Float_Literal (Stloc, Radix, -Significand, Exponent);
2096
2097 Set_Etype (L, Id);
2098 Set_Is_Static_Expression (L);
2099
2100 Set_Etype (H, Id);
2101 Set_Is_Static_Expression (H);
2102
2103 R := New_Node (N_Range, Stloc);
2104 Set_Low_Bound (R, L);
2105 Set_High_Bound (R, H);
2106 Set_Includes_Infinities (R, True);
2107 Set_Scalar_Range (Id, R);
2108 Set_Etype (R, Id);
2109 Set_Parent (R, Id);
2110 end Set_Float_Bounds;
2111
2112 ------------------------
2113 -- Set_Integer_Bounds --
2114 ------------------------
2115
2116 procedure Set_Integer_Bounds
2117 (Id : Entity_Id;
2118 Typ : Entity_Id;
2119 Lb : Uint;
2120 Hb : Uint)
2121 is
2122 L : Node_Id;
2123 H : Node_Id;
2124 -- Low and high bounds of literal value
2125
2126 R : Node_Id;
2127 -- Range specification
2128
2129 begin
2130 L := Make_Integer (Lb);
2131 H := Make_Integer (Hb);
2132
2133 Set_Etype (L, Typ);
2134 Set_Etype (H, Typ);
2135
2136 R := New_Node (N_Range, Stloc);
2137 Set_Low_Bound (R, L);
2138 Set_High_Bound (R, H);
2139 Set_Scalar_Range (Id, R);
2140 Set_Etype (R, Typ);
2141 Set_Parent (R, Id);
2142 Set_Is_Unsigned_Type (Id, Lb >= 0);
2143 end Set_Integer_Bounds;
2144
2145 end CStand;
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