1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2004 Free Software Foundation, Inc. --
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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 with Atree; use Atree;
28 with Csets; use Csets;
29 with Debug; use Debug;
30 with Einfo; use Einfo;
31 with Layout; use Layout;
32 with Namet; use Namet;
33 with Nlists; use Nlists;
34 with Nmake; use Nmake;
36 with Output; use Output;
37 with Targparm; use Targparm;
38 with Tbuild; use Tbuild;
39 with Ttypes; use Ttypes;
40 with Ttypef; use Ttypef;
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;
50 package body CStand is
52 Stloc : constant Source_Ptr := Standard_Location;
53 Staloc : constant Source_Ptr := Standard_ASCII_Location;
54 -- Standard abbreviations used throughout this package
56 -----------------------
57 -- Local Subprograms --
58 -----------------------
60 procedure Build_Float_Type (E : Entity_Id; Siz : Int; Digs : Int);
61 -- Procedure to build standard predefined float base type. The first
62 -- parameter is the entity for the type, and the second parameter
63 -- is the size in bits. The third parameter is the digits value.
65 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Int);
66 -- Procedure to build standard predefined signed integer subtype. The
67 -- first parameter is the entity for the subtype. The second parameter
68 -- is the size in bits. The corresponding base type is not built by
69 -- this routine but instead must be built by the caller where needed.
71 procedure Create_Operators;
72 -- Make entries for each of the predefined operators in Standard
74 procedure Create_Unconstrained_Base_Type
77 -- The predefined signed integer types are constrained subtypes which
78 -- must have a corresponding unconstrained base type. This type is almost
79 -- useless. The only place it has semantics is Subtypes_Statically_Match.
80 -- Consequently, we arrange for it to be identical apart from the setting
81 -- of the constrained bit. This routine takes an entity E for the Type,
82 -- copies it to estabish the base type, then resets the Ekind of the
83 -- original entity to K (the Ekind for the subtype). The Etype field of
84 -- E is set by the call (to point to the created base type entity), and
85 -- also the Is_Constrained flag of E is set.
87 -- To understand the exact requirement for this, see RM 3.5.4(11) which
88 -- makes it clear that Integer, for example, is constrained, with the
89 -- constraint bounds matching the bounds of the (unconstrained) base
90 -- type. The point is that Integer and Integer'Base have identical
91 -- bounds, but do not statically match, since a subtype with constraints
92 -- never matches a subtype with no constraints.
94 function Identifier_For (S : Standard_Entity_Type) return Node_Id;
95 -- Returns an identifier node with the same name as the defining
96 -- identifier corresponding to the given Standard_Entity_Type value
98 procedure Make_Component
102 -- Build a record component with the given type and name, and append to
103 -- the list of components of Rec.
107 Formal_Name : String) return Entity_Id;
108 -- Construct entity for subprogram formal with given name and type
110 function Make_Integer (V : Uint) return Node_Id;
111 -- Builds integer literal with given value
113 procedure Make_Name (Id : Entity_Id; Nam : String);
114 -- Make an entry in the names table for Nam, and set as Chars field of Id
116 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id;
117 -- Build entity for standard operator with given name and type.
119 function New_Standard_Entity
120 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id;
121 -- Builds a new entity for Standard
123 procedure Print_Standard;
124 -- Print representation of package Standard if switch set
126 procedure Set_Integer_Bounds
131 -- Procedure to set bounds for integer type or subtype. Id is the entity
132 -- whose bounds and type are to be set. The Typ parameter is the Etype
133 -- value for the entity (which will be the same as Id for all predefined
134 -- integer base types. The third and fourth parameters are the bounds.
136 ----------------------
137 -- Build_Float_Type --
138 ----------------------
140 procedure Build_Float_Type (E : Entity_Id; Siz : Int; Digs : Int) is
142 Set_Type_Definition (Parent (E),
143 Make_Floating_Point_Definition (Stloc,
144 Digits_Expression => Make_Integer (UI_From_Int (Digs))));
145 Set_Ekind (E, E_Floating_Point_Type);
148 Set_Prim_Alignment (E);
149 Init_Digits_Value (E, Digs);
150 Set_Float_Bounds (E);
153 Set_Size_Known_At_Compile_Time (E);
154 end Build_Float_Type;
156 -------------------------------
157 -- Build_Signed_Integer_Type --
158 -------------------------------
160 procedure Build_Signed_Integer_Type (E : Entity_Id; Siz : Int) is
161 U2Siz1 : constant Uint := 2 ** (Siz - 1);
162 Lbound : constant Uint := -U2Siz1;
163 Ubound : constant Uint := U2Siz1 - 1;
166 Set_Type_Definition (Parent (E),
167 Make_Signed_Integer_Type_Definition (Stloc,
168 Low_Bound => Make_Integer (Lbound),
169 High_Bound => Make_Integer (Ubound)));
171 Set_Ekind (E, E_Signed_Integer_Type);
174 Set_Prim_Alignment (E);
175 Set_Integer_Bounds (E, E, Lbound, Ubound);
178 Set_Is_Known_Valid (E);
179 Set_Size_Known_At_Compile_Time (E);
180 end Build_Signed_Integer_Type;
182 ----------------------
183 -- Create_Operators --
184 ----------------------
186 -- Each operator has an abbreviated signature. The formals have the names
187 -- LEFT and RIGHT. Their types are not actually used for resolution.
189 procedure Create_Operators is
192 -- Following list has two entries for concatenation, to include
193 -- explicitly the operation on wide strings.
195 Binary_Ops : constant array (S_Binary_Ops) of Name_Id :=
196 (Name_Op_Add, Name_Op_And, Name_Op_Concat, Name_Op_Concat,
197 Name_Op_Divide, Name_Op_Eq, Name_Op_Expon, Name_Op_Ge,
198 Name_Op_Gt, Name_Op_Le, Name_Op_Lt, Name_Op_Mod,
199 Name_Op_Multiply, Name_Op_Ne, Name_Op_Or, Name_Op_Rem,
200 Name_Op_Subtract, Name_Op_Xor);
202 Bin_Op_Types : constant array (S_Binary_Ops) of Entity_Id :=
203 (Universal_Integer, Standard_Boolean,
204 Standard_String, Standard_Wide_String,
205 Universal_Integer, Standard_Boolean,
206 Universal_Integer, Standard_Boolean,
207 Standard_Boolean, Standard_Boolean,
208 Standard_Boolean, Universal_Integer,
209 Universal_Integer, Standard_Boolean,
210 Standard_Boolean, Universal_Integer,
211 Universal_Integer, Standard_Boolean);
213 Unary_Ops : constant array (S_Unary_Ops) of Name_Id :=
214 (Name_Op_Abs, Name_Op_Subtract, Name_Op_Not, Name_Op_Add);
216 Unary_Op_Types : constant array (S_Unary_Ops) of Entity_Id :=
217 (Universal_Integer, Universal_Integer,
218 Standard_Boolean, Universal_Integer);
220 -- Corresponding to Abs, Minus, Not, and Plus.
223 for J in S_Binary_Ops loop
224 Op_Node := New_Operator (Binary_Ops (J), Bin_Op_Types (J));
226 Append_Entity (Make_Formal (Any_Type, "LEFT"), Op_Node);
227 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
230 for J in S_Unary_Ops loop
231 Op_Node := New_Operator (Unary_Ops (J), Unary_Op_Types (J));
233 Append_Entity (Make_Formal (Any_Type, "RIGHT"), Op_Node);
236 -- For concatenation, we create a separate operator for each
237 -- array type. This simplifies the resolution of the component-
238 -- component concatenation operation. In Standard, we set the types
239 -- of the formals for string and wide string concatenation.
241 Set_Etype (First_Entity (Standard_Op_Concat), Standard_String);
242 Set_Etype (Last_Entity (Standard_Op_Concat), Standard_String);
244 Set_Etype (First_Entity (Standard_Op_Concatw), Standard_Wide_String);
245 Set_Etype (Last_Entity (Standard_Op_Concatw), Standard_Wide_String);
247 end Create_Operators;
249 ---------------------
250 -- Create_Standard --
251 ---------------------
253 -- The tree for the package Standard is prefixed to all compilations.
254 -- Several entities required by semantic analysis are denoted by global
255 -- variables that are initialized to point to the corresponding
256 -- occurrences in STANDARD. The visible entities of STANDARD are
257 -- created here. The private entities defined in STANDARD are created
258 -- by Initialize_Standard in the semantics module.
260 procedure Create_Standard is
261 Decl_S : constant List_Id := New_List;
262 -- List of declarations in Standard
264 Decl_A : constant List_Id := New_List;
265 -- List of declarations in ASCII
270 Ident_Node : Node_Id;
276 procedure Build_Exception (S : Standard_Entity_Type);
277 -- Procedure to declare given entity as an exception
279 ---------------------
280 -- Build_Exception --
281 ---------------------
283 procedure Build_Exception (S : Standard_Entity_Type) is
285 Set_Ekind (Standard_Entity (S), E_Exception);
286 Set_Etype (Standard_Entity (S), Standard_Exception_Type);
287 Set_Exception_Code (Standard_Entity (S), Uint_0);
288 Set_Is_Public (Standard_Entity (S), True);
291 Make_Exception_Declaration (Stloc,
292 Defining_Identifier => Standard_Entity (S));
293 Append (Decl, Decl_S);
296 -- Start of processing for Create_Standard
299 -- Initialize scanner for internal scans of literals
301 Scn.Initialize_Scanner (No_Unit, Internal_Source_File);
303 -- First step is to create defining identifiers for each entity
305 for S in Standard_Entity_Type loop
307 S_Name : constant String := Standard_Entity_Type'Image (S);
308 -- Name of entity (note we skip S_ at the start)
310 Ident_Node : Node_Id;
311 -- Defining identifier node
314 Ident_Node := New_Standard_Entity;
315 Make_Name (Ident_Node, S_Name (3 .. S_Name'Length));
316 Standard_Entity (S) := Ident_Node;
320 -- Create package declaration node for package Standard
322 Standard_Package_Node := New_Node (N_Package_Declaration, Stloc);
324 Pspec := New_Node (N_Package_Specification, Stloc);
325 Set_Specification (Standard_Package_Node, Pspec);
327 Set_Defining_Unit_Name (Pspec, Standard_Standard);
328 Set_Visible_Declarations (Pspec, Decl_S);
330 Set_Ekind (Standard_Standard, E_Package);
331 Set_Is_Pure (Standard_Standard);
332 Set_Is_Compilation_Unit (Standard_Standard);
334 -- Create type declaration nodes for standard types
336 for S in S_Types loop
337 Decl := New_Node (N_Full_Type_Declaration, Stloc);
338 Set_Defining_Identifier (Decl, Standard_Entity (S));
339 Set_Is_Frozen (Standard_Entity (S));
340 Set_Is_Public (Standard_Entity (S));
341 Append (Decl, Decl_S);
344 -- Create type definition node for type Boolean. The Size is set to
345 -- 1 as required by Ada 95 and current ARG interpretations for Ada/83.
347 -- Note: Object_Size of Boolean is 8. This means that we do NOT in
348 -- general know that Boolean variables have valid values, so we do
349 -- not set the Is_Known_Valid flag.
351 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
352 Set_Literals (Tdef_Node, New_List);
353 Append (Standard_False, Literals (Tdef_Node));
354 Append (Standard_True, Literals (Tdef_Node));
355 Set_Type_Definition (Parent (Standard_Boolean), Tdef_Node);
357 Set_Ekind (Standard_Boolean, E_Enumeration_Type);
358 Set_First_Literal (Standard_Boolean, Standard_False);
359 Set_Etype (Standard_Boolean, Standard_Boolean);
360 Init_Esize (Standard_Boolean, Standard_Character_Size);
361 Init_RM_Size (Standard_Boolean, 1);
362 Set_Prim_Alignment (Standard_Boolean);
364 Set_Is_Unsigned_Type (Standard_Boolean);
365 Set_Size_Known_At_Compile_Time (Standard_Boolean);
367 Set_Ekind (Standard_True, E_Enumeration_Literal);
368 Set_Etype (Standard_True, Standard_Boolean);
369 Set_Enumeration_Pos (Standard_True, Uint_1);
370 Set_Enumeration_Rep (Standard_True, Uint_1);
371 Set_Is_Known_Valid (Standard_True, True);
373 Set_Ekind (Standard_False, E_Enumeration_Literal);
374 Set_Etype (Standard_False, Standard_Boolean);
375 Set_Enumeration_Pos (Standard_False, Uint_0);
376 Set_Enumeration_Rep (Standard_False, Uint_0);
377 Set_Is_Known_Valid (Standard_False, True);
379 -- For the bounds of Boolean, we create a range node corresponding to
381 -- range False .. True
383 -- where the occurrences of the literals must point to the
384 -- corresponding definition.
386 R_Node := New_Node (N_Range, Stloc);
387 B_Node := New_Node (N_Identifier, Stloc);
388 Set_Chars (B_Node, Chars (Standard_False));
389 Set_Entity (B_Node, Standard_False);
390 Set_Etype (B_Node, Standard_Boolean);
391 Set_Is_Static_Expression (B_Node);
392 Set_Low_Bound (R_Node, B_Node);
394 B_Node := New_Node (N_Identifier, Stloc);
395 Set_Chars (B_Node, Chars (Standard_True));
396 Set_Entity (B_Node, Standard_True);
397 Set_Etype (B_Node, Standard_Boolean);
398 Set_Is_Static_Expression (B_Node);
399 Set_High_Bound (R_Node, B_Node);
401 Set_Scalar_Range (Standard_Boolean, R_Node);
402 Set_Etype (R_Node, Standard_Boolean);
403 Set_Parent (R_Node, Standard_Boolean);
405 -- Create type definition nodes for predefined integer types
407 Build_Signed_Integer_Type
408 (Standard_Short_Short_Integer, Standard_Short_Short_Integer_Size);
410 Build_Signed_Integer_Type
411 (Standard_Short_Integer, Standard_Short_Integer_Size);
413 Build_Signed_Integer_Type
414 (Standard_Integer, Standard_Integer_Size);
422 LIS := Standard_Long_Integer_Size;
425 Build_Signed_Integer_Type (Standard_Long_Integer, LIS);
428 Build_Signed_Integer_Type
429 (Standard_Long_Long_Integer, Standard_Long_Long_Integer_Size);
431 Create_Unconstrained_Base_Type
432 (Standard_Short_Short_Integer, E_Signed_Integer_Subtype);
434 Create_Unconstrained_Base_Type
435 (Standard_Short_Integer, E_Signed_Integer_Subtype);
437 Create_Unconstrained_Base_Type
438 (Standard_Integer, E_Signed_Integer_Subtype);
440 Create_Unconstrained_Base_Type
441 (Standard_Long_Integer, E_Signed_Integer_Subtype);
443 Create_Unconstrained_Base_Type
444 (Standard_Long_Long_Integer, E_Signed_Integer_Subtype);
446 -- Create type definition nodes for predefined float types
449 (Standard_Short_Float,
450 Standard_Short_Float_Size,
451 Standard_Short_Float_Digits);
456 Standard_Float_Digits);
459 (Standard_Long_Float,
460 Standard_Long_Float_Size,
461 Standard_Long_Float_Digits);
464 (Standard_Long_Long_Float,
465 Standard_Long_Long_Float_Size,
466 Standard_Long_Long_Float_Digits);
468 -- Create type definition node for type Character. Note that we do not
469 -- set the Literals field, since type Character is handled with special
470 -- routine that do not need a literal list.
472 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
473 Set_Type_Definition (Parent (Standard_Character), Tdef_Node);
475 Set_Ekind (Standard_Character, E_Enumeration_Type);
476 Set_Etype (Standard_Character, Standard_Character);
477 Init_Esize (Standard_Character, Standard_Character_Size);
478 Init_RM_Size (Standard_Character, 8);
479 Set_Prim_Alignment (Standard_Character);
481 Set_Is_Unsigned_Type (Standard_Character);
482 Set_Is_Character_Type (Standard_Character);
483 Set_Is_Known_Valid (Standard_Character);
484 Set_Size_Known_At_Compile_Time (Standard_Character);
486 -- Create the bounds for type Character.
488 R_Node := New_Node (N_Range, Stloc);
490 -- Low bound for type Character (Standard.Nul)
492 B_Node := New_Node (N_Character_Literal, Stloc);
493 Set_Is_Static_Expression (B_Node);
494 Set_Chars (B_Node, No_Name);
495 Set_Char_Literal_Value (B_Node, 16#00#);
496 Set_Entity (B_Node, Empty);
497 Set_Etype (B_Node, Standard_Character);
498 Set_Low_Bound (R_Node, B_Node);
500 -- High bound for type Character
502 B_Node := New_Node (N_Character_Literal, Stloc);
503 Set_Is_Static_Expression (B_Node);
504 Set_Chars (B_Node, No_Name);
505 Set_Char_Literal_Value (B_Node, 16#FF#);
506 Set_Entity (B_Node, Empty);
507 Set_Etype (B_Node, Standard_Character);
508 Set_High_Bound (R_Node, B_Node);
510 Set_Scalar_Range (Standard_Character, R_Node);
511 Set_Etype (R_Node, Standard_Character);
512 Set_Parent (R_Node, Standard_Character);
514 -- Create type definition for type Wide_Character. Note that we do not
515 -- set the Literals field, since type Wide_Character is handled with
516 -- special routines that do not need a literal list.
518 Tdef_Node := New_Node (N_Enumeration_Type_Definition, Stloc);
519 Set_Type_Definition (Parent (Standard_Wide_Character), Tdef_Node);
521 Set_Ekind (Standard_Wide_Character, E_Enumeration_Type);
522 Set_Etype (Standard_Wide_Character, Standard_Wide_Character);
523 Init_Size (Standard_Wide_Character, Standard_Wide_Character_Size);
525 Set_Prim_Alignment (Standard_Wide_Character);
526 Set_Is_Unsigned_Type (Standard_Wide_Character);
527 Set_Is_Character_Type (Standard_Wide_Character);
528 Set_Is_Known_Valid (Standard_Wide_Character);
529 Set_Size_Known_At_Compile_Time (Standard_Wide_Character);
531 -- Create the bounds for type Wide_Character.
533 R_Node := New_Node (N_Range, Stloc);
535 -- Low bound for type Wide_Character
537 B_Node := New_Node (N_Character_Literal, Stloc);
538 Set_Is_Static_Expression (B_Node);
539 Set_Chars (B_Node, No_Name); -- ???
540 Set_Char_Literal_Value (B_Node, 16#0000#);
541 Set_Entity (B_Node, Empty);
542 Set_Etype (B_Node, Standard_Wide_Character);
543 Set_Low_Bound (R_Node, B_Node);
545 -- High bound for type Wide_Character
547 B_Node := New_Node (N_Character_Literal, Stloc);
548 Set_Is_Static_Expression (B_Node);
549 Set_Chars (B_Node, No_Name); -- ???
550 Set_Char_Literal_Value (B_Node, 16#FFFF#);
551 Set_Entity (B_Node, Empty);
552 Set_Etype (B_Node, Standard_Wide_Character);
553 Set_High_Bound (R_Node, B_Node);
555 Set_Scalar_Range (Standard_Wide_Character, R_Node);
556 Set_Etype (R_Node, Standard_Wide_Character);
557 Set_Parent (R_Node, Standard_Wide_Character);
559 -- Create type definition node for type String
561 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
564 CompDef_Node : Node_Id;
566 CompDef_Node := New_Node (N_Component_Definition, Stloc);
567 Set_Aliased_Present (CompDef_Node, False);
568 Set_Access_Definition (CompDef_Node, Empty);
569 Set_Subtype_Indication (CompDef_Node, Identifier_For (S_Character));
570 Set_Component_Definition (Tdef_Node, CompDef_Node);
573 Set_Subtype_Marks (Tdef_Node, New_List);
574 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
575 Set_Type_Definition (Parent (Standard_String), Tdef_Node);
577 Set_Ekind (Standard_String, E_String_Type);
578 Set_Etype (Standard_String, Standard_String);
579 Set_Component_Type (Standard_String, Standard_Character);
580 Set_Component_Size (Standard_String, Uint_8);
581 Init_Size_Align (Standard_String);
583 -- Set index type of String
586 (Subtype_Marks (Type_Definition (Parent (Standard_String))));
587 Set_First_Index (Standard_String, E_Id);
588 Set_Entity (E_Id, Standard_Positive);
589 Set_Etype (E_Id, Standard_Positive);
591 -- Create type definition node for type Wide_String
593 Tdef_Node := New_Node (N_Unconstrained_Array_Definition, Stloc);
595 CompDef_Node : Node_Id;
597 CompDef_Node := New_Node (N_Component_Definition, Stloc);
598 Set_Aliased_Present (CompDef_Node, False);
599 Set_Access_Definition (CompDef_Node, Empty);
600 Set_Subtype_Indication (CompDef_Node,
601 Identifier_For (S_Wide_Character));
602 Set_Component_Definition (Tdef_Node, CompDef_Node);
604 Set_Subtype_Marks (Tdef_Node, New_List);
605 Append (Identifier_For (S_Positive), Subtype_Marks (Tdef_Node));
606 Set_Type_Definition (Parent (Standard_Wide_String), Tdef_Node);
608 Set_Ekind (Standard_Wide_String, E_String_Type);
609 Set_Etype (Standard_Wide_String, Standard_Wide_String);
610 Set_Component_Type (Standard_Wide_String, Standard_Wide_Character);
611 Set_Component_Size (Standard_Wide_String, Uint_16);
612 Init_Size_Align (Standard_Wide_String);
614 -- Set index type of Wide_String
617 (Subtype_Marks (Type_Definition (Parent (Standard_Wide_String))));
618 Set_First_Index (Standard_Wide_String, E_Id);
619 Set_Entity (E_Id, Standard_Positive);
620 Set_Etype (E_Id, Standard_Positive);
622 -- Create subtype declaration for Natural
624 Decl := New_Node (N_Subtype_Declaration, Stloc);
625 Set_Defining_Identifier (Decl, Standard_Natural);
626 Set_Subtype_Indication (Decl,
627 New_Occurrence_Of (Standard_Integer, Stloc));
628 Append (Decl, Decl_S);
630 Set_Ekind (Standard_Natural, E_Signed_Integer_Subtype);
631 Set_Etype (Standard_Natural, Base_Type (Standard_Integer));
632 Init_Esize (Standard_Natural, Standard_Integer_Size);
633 Init_RM_Size (Standard_Natural, Standard_Integer_Size - 1);
634 Set_Prim_Alignment (Standard_Natural);
635 Set_Size_Known_At_Compile_Time
637 Set_Integer_Bounds (Standard_Natural,
638 Typ => Base_Type (Standard_Integer),
640 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
641 Set_Is_Constrained (Standard_Natural);
642 Set_Is_Frozen (Standard_Natural);
643 Set_Is_Public (Standard_Natural);
645 -- Create subtype declaration for Positive
647 Decl := New_Node (N_Subtype_Declaration, Stloc);
648 Set_Defining_Identifier (Decl, Standard_Positive);
649 Set_Subtype_Indication (Decl,
650 New_Occurrence_Of (Standard_Integer, Stloc));
651 Append (Decl, Decl_S);
653 Set_Ekind (Standard_Positive, E_Signed_Integer_Subtype);
654 Set_Etype (Standard_Positive, Base_Type (Standard_Integer));
655 Init_Esize (Standard_Positive, Standard_Integer_Size);
656 Init_RM_Size (Standard_Positive, Standard_Integer_Size - 1);
657 Set_Prim_Alignment (Standard_Positive);
659 Set_Size_Known_At_Compile_Time (Standard_Positive);
661 Set_Integer_Bounds (Standard_Positive,
662 Typ => Base_Type (Standard_Integer),
664 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
665 Set_Is_Constrained (Standard_Positive);
666 Set_Is_Frozen (Standard_Positive);
667 Set_Is_Public (Standard_Positive);
669 -- Create declaration for package ASCII
671 Decl := New_Node (N_Package_Declaration, Stloc);
672 Append (Decl, Decl_S);
674 Pspec := New_Node (N_Package_Specification, Stloc);
675 Set_Specification (Decl, Pspec);
677 Set_Defining_Unit_Name (Pspec, Standard_Entity (S_ASCII));
678 Set_Ekind (Standard_Entity (S_ASCII), E_Package);
679 Set_Visible_Declarations (Pspec, Decl_A);
681 -- Create control character definitions in package ASCII. Note that
682 -- the character literal entries created here correspond to literal
683 -- values that are impossible in the source, but can be represented
684 -- internally with no difficulties.
688 for S in S_ASCII_Names loop
689 Decl := New_Node (N_Object_Declaration, Staloc);
690 Set_Constant_Present (Decl, True);
693 A_Char : constant Entity_Id := Standard_Entity (S);
697 Set_Sloc (A_Char, Staloc);
698 Set_Ekind (A_Char, E_Constant);
699 Set_Never_Set_In_Source (A_Char, True);
700 Set_Is_True_Constant (A_Char, True);
701 Set_Etype (A_Char, Standard_Character);
702 Set_Scope (A_Char, Standard_Entity (S_ASCII));
703 Set_Is_Immediately_Visible (A_Char, False);
704 Set_Is_Public (A_Char, True);
705 Set_Is_Known_Valid (A_Char, True);
707 Append_Entity (A_Char, Standard_Entity (S_ASCII));
708 Set_Defining_Identifier (Decl, A_Char);
710 Set_Object_Definition (Decl, Identifier_For (S_Character));
711 Expr_Decl := New_Node (N_Character_Literal, Staloc);
712 Set_Expression (Decl, Expr_Decl);
714 Set_Is_Static_Expression (Expr_Decl);
715 Set_Chars (Expr_Decl, No_Name);
716 Set_Etype (Expr_Decl, Standard_Character);
717 Set_Char_Literal_Value (Expr_Decl, Ccode);
720 Append (Decl, Decl_A);
722 -- Increment character code, dealing with non-contiguities
726 if Ccode = 16#20# then
728 elsif Ccode = 16#27# then
730 elsif Ccode = 16#3C# then
732 elsif Ccode = 16#41# then
737 -- Create semantic phase entities
739 Standard_Void_Type := New_Standard_Entity;
740 Set_Ekind (Standard_Void_Type, E_Void);
741 Set_Etype (Standard_Void_Type, Standard_Void_Type);
742 Set_Scope (Standard_Void_Type, Standard_Standard);
743 Make_Name (Standard_Void_Type, "_void_type");
745 -- The type field of packages is set to void
747 Set_Etype (Standard_Standard, Standard_Void_Type);
748 Set_Etype (Standard_ASCII, Standard_Void_Type);
750 -- Standard_A_String is actually used in generated code, so it has a
751 -- type name that is reasonable, but does not overlap any Ada name.
753 Standard_A_String := New_Standard_Entity;
754 Set_Ekind (Standard_A_String, E_Access_Type);
755 Set_Scope (Standard_A_String, Standard_Standard);
756 Set_Etype (Standard_A_String, Standard_A_String);
759 Init_Size (Standard_A_String, System_Address_Size);
761 Init_Size (Standard_A_String, System_Address_Size * 2);
764 Init_Alignment (Standard_A_String);
766 Set_Directly_Designated_Type
767 (Standard_A_String, Standard_String);
768 Make_Name (Standard_A_String, "access_string");
770 Standard_A_Char := New_Standard_Entity;
771 Set_Ekind (Standard_A_Char, E_Access_Type);
772 Set_Scope (Standard_A_Char, Standard_Standard);
773 Set_Etype (Standard_A_Char, Standard_A_String);
774 Init_Size (Standard_A_Char, System_Address_Size);
775 Set_Prim_Alignment (Standard_A_Char);
777 Set_Directly_Designated_Type (Standard_A_Char, Standard_Character);
778 Make_Name (Standard_A_Char, "access_character");
780 -- Note on type names. The type names for the following special types
781 -- are constructed so that they will look reasonable should they ever
782 -- appear in error messages etc, although in practice the use of the
783 -- special insertion character } for types results in special handling
784 -- of these type names in any case. The blanks in these names would
785 -- trouble in Gigi, but that's OK here, since none of these types
786 -- should ever get through to Gigi! Attributes of these types are
787 -- filled out to minimize problems with cascaded errors (for example,
788 -- Any_Integer is given reasonable and consistent type and size values)
790 Any_Type := New_Standard_Entity;
791 Decl := New_Node (N_Full_Type_Declaration, Stloc);
792 Set_Defining_Identifier (Decl, Any_Type);
793 Set_Scope (Any_Type, Standard_Standard);
794 Build_Signed_Integer_Type (Any_Type, Standard_Integer_Size);
795 Make_Name (Any_Type, "any type");
797 Any_Id := New_Standard_Entity;
798 Set_Ekind (Any_Id, E_Variable);
799 Set_Scope (Any_Id, Standard_Standard);
800 Set_Etype (Any_Id, Any_Type);
801 Init_Size_Align (Any_Id);
802 Make_Name (Any_Id, "any id");
804 Any_Access := New_Standard_Entity;
805 Set_Ekind (Any_Access, E_Access_Type);
806 Set_Scope (Any_Access, Standard_Standard);
807 Set_Etype (Any_Access, Any_Access);
808 Init_Size (Any_Access, System_Address_Size);
809 Set_Prim_Alignment (Any_Access);
810 Make_Name (Any_Access, "an access type");
812 Any_Character := New_Standard_Entity;
813 Set_Ekind (Any_Character, E_Enumeration_Type);
814 Set_Scope (Any_Character, Standard_Standard);
815 Set_Etype (Any_Character, Any_Character);
816 Set_Is_Unsigned_Type (Any_Character);
817 Set_Is_Character_Type (Any_Character);
818 Init_Esize (Any_Character, Standard_Character_Size);
819 Init_RM_Size (Any_Character, 8);
820 Set_Prim_Alignment (Any_Character);
821 Set_Scalar_Range (Any_Character, Scalar_Range (Standard_Character));
822 Make_Name (Any_Character, "a character type");
824 Any_Array := New_Standard_Entity;
825 Set_Ekind (Any_Array, E_String_Type);
826 Set_Scope (Any_Array, Standard_Standard);
827 Set_Etype (Any_Array, Any_Array);
828 Set_Component_Type (Any_Array, Any_Character);
829 Init_Size_Align (Any_Array);
830 Make_Name (Any_Array, "an array type");
832 Any_Boolean := New_Standard_Entity;
833 Set_Ekind (Any_Boolean, E_Enumeration_Type);
834 Set_Scope (Any_Boolean, Standard_Standard);
835 Set_Etype (Any_Boolean, Standard_Boolean);
836 Init_Esize (Any_Boolean, Standard_Character_Size);
837 Init_RM_Size (Any_Boolean, 1);
838 Set_Prim_Alignment (Any_Boolean);
839 Set_Is_Unsigned_Type (Any_Boolean);
840 Set_Scalar_Range (Any_Boolean, Scalar_Range (Standard_Boolean));
841 Make_Name (Any_Boolean, "a boolean type");
843 Any_Composite := New_Standard_Entity;
844 Set_Ekind (Any_Composite, E_Array_Type);
845 Set_Scope (Any_Composite, Standard_Standard);
846 Set_Etype (Any_Composite, Any_Composite);
847 Set_Component_Size (Any_Composite, Uint_0);
848 Set_Component_Type (Any_Composite, Standard_Integer);
849 Init_Size_Align (Any_Composite);
850 Make_Name (Any_Composite, "a composite type");
852 Any_Discrete := New_Standard_Entity;
853 Set_Ekind (Any_Discrete, E_Signed_Integer_Type);
854 Set_Scope (Any_Discrete, Standard_Standard);
855 Set_Etype (Any_Discrete, Any_Discrete);
856 Init_Size (Any_Discrete, Standard_Integer_Size);
857 Set_Prim_Alignment (Any_Discrete);
858 Make_Name (Any_Discrete, "a discrete type");
860 Any_Fixed := New_Standard_Entity;
861 Set_Ekind (Any_Fixed, E_Ordinary_Fixed_Point_Type);
862 Set_Scope (Any_Fixed, Standard_Standard);
863 Set_Etype (Any_Fixed, Any_Fixed);
864 Init_Size (Any_Fixed, Standard_Integer_Size);
865 Set_Prim_Alignment (Any_Fixed);
866 Make_Name (Any_Fixed, "a fixed-point type");
868 Any_Integer := New_Standard_Entity;
869 Set_Ekind (Any_Integer, E_Signed_Integer_Type);
870 Set_Scope (Any_Integer, Standard_Standard);
871 Set_Etype (Any_Integer, Standard_Long_Long_Integer);
872 Init_Size (Any_Integer, Standard_Long_Long_Integer_Size);
873 Set_Prim_Alignment (Any_Integer);
877 Typ => Base_Type (Standard_Integer),
879 Hb => Intval (High_Bound (Scalar_Range (Standard_Integer))));
880 Make_Name (Any_Integer, "an integer type");
882 Any_Modular := New_Standard_Entity;
883 Set_Ekind (Any_Modular, E_Modular_Integer_Type);
884 Set_Scope (Any_Modular, Standard_Standard);
885 Set_Etype (Any_Modular, Standard_Long_Long_Integer);
886 Init_Size (Any_Modular, Standard_Long_Long_Integer_Size);
887 Set_Prim_Alignment (Any_Modular);
888 Set_Is_Unsigned_Type (Any_Modular);
889 Make_Name (Any_Modular, "a modular type");
891 Any_Numeric := New_Standard_Entity;
892 Set_Ekind (Any_Numeric, E_Signed_Integer_Type);
893 Set_Scope (Any_Numeric, Standard_Standard);
894 Set_Etype (Any_Numeric, Standard_Long_Long_Integer);
895 Init_Size (Any_Numeric, Standard_Long_Long_Integer_Size);
896 Set_Prim_Alignment (Any_Numeric);
897 Make_Name (Any_Numeric, "a numeric type");
899 Any_Real := New_Standard_Entity;
900 Set_Ekind (Any_Real, E_Floating_Point_Type);
901 Set_Scope (Any_Real, Standard_Standard);
902 Set_Etype (Any_Real, Standard_Long_Long_Float);
903 Init_Size (Any_Real, Standard_Long_Long_Float_Size);
904 Set_Prim_Alignment (Any_Real);
905 Make_Name (Any_Real, "a real type");
907 Any_Scalar := New_Standard_Entity;
908 Set_Ekind (Any_Scalar, E_Signed_Integer_Type);
909 Set_Scope (Any_Scalar, Standard_Standard);
910 Set_Etype (Any_Scalar, Any_Scalar);
911 Init_Size (Any_Scalar, Standard_Integer_Size);
912 Set_Prim_Alignment (Any_Scalar);
913 Make_Name (Any_Scalar, "a scalar type");
915 Any_String := New_Standard_Entity;
916 Set_Ekind (Any_String, E_String_Type);
917 Set_Scope (Any_String, Standard_Standard);
918 Set_Etype (Any_String, Any_String);
919 Set_Component_Type (Any_String, Any_Character);
920 Init_Size_Align (Any_String);
921 Make_Name (Any_String, "a string type");
929 Low_Bound => Make_Integer (Uint_0),
930 High_Bound => Make_Integer (Uint_2 ** Standard_Integer_Size));
931 Set_Etype (Index, Standard_Integer);
932 Set_First_Index (Any_String, Index);
935 Standard_Integer_8 := New_Standard_Entity;
936 Decl := New_Node (N_Full_Type_Declaration, Stloc);
937 Set_Defining_Identifier (Decl, Standard_Integer_8);
938 Make_Name (Standard_Integer_8, "integer_8");
939 Set_Scope (Standard_Integer_8, Standard_Standard);
940 Build_Signed_Integer_Type (Standard_Integer_8, 8);
942 Standard_Integer_16 := New_Standard_Entity;
943 Decl := New_Node (N_Full_Type_Declaration, Stloc);
944 Set_Defining_Identifier (Decl, Standard_Integer_16);
945 Make_Name (Standard_Integer_16, "integer_16");
946 Set_Scope (Standard_Integer_16, Standard_Standard);
947 Build_Signed_Integer_Type (Standard_Integer_16, 16);
949 Standard_Integer_32 := New_Standard_Entity;
950 Decl := New_Node (N_Full_Type_Declaration, Stloc);
951 Set_Defining_Identifier (Decl, Standard_Integer_32);
952 Make_Name (Standard_Integer_32, "integer_32");
953 Set_Scope (Standard_Integer_32, Standard_Standard);
954 Build_Signed_Integer_Type (Standard_Integer_32, 32);
956 Standard_Integer_64 := New_Standard_Entity;
957 Decl := New_Node (N_Full_Type_Declaration, Stloc);
958 Set_Defining_Identifier (Decl, Standard_Integer_64);
959 Make_Name (Standard_Integer_64, "integer_64");
960 Set_Scope (Standard_Integer_64, Standard_Standard);
961 Build_Signed_Integer_Type (Standard_Integer_64, 64);
963 Standard_Unsigned := New_Standard_Entity;
964 Decl := New_Node (N_Full_Type_Declaration, Stloc);
965 Set_Defining_Identifier (Decl, Standard_Unsigned);
966 Make_Name (Standard_Unsigned, "unsigned");
968 Set_Ekind (Standard_Unsigned, E_Modular_Integer_Type);
969 Set_Scope (Standard_Unsigned, Standard_Standard);
970 Set_Etype (Standard_Unsigned, Standard_Unsigned);
971 Init_Size (Standard_Unsigned, Standard_Integer_Size);
972 Set_Prim_Alignment (Standard_Unsigned);
973 Set_Modulus (Standard_Unsigned,
974 Uint_2 ** Standard_Integer_Size);
975 Set_Is_Unsigned_Type (Standard_Unsigned);
976 Set_Size_Known_At_Compile_Time
979 R_Node := New_Node (N_Range, Stloc);
980 Set_Low_Bound (R_Node, Make_Integer (Uint_0));
981 Set_High_Bound (R_Node, Make_Integer (Modulus (Standard_Unsigned) - 1));
982 Set_Etype (Low_Bound (R_Node), Standard_Unsigned);
983 Set_Etype (High_Bound (R_Node), Standard_Unsigned);
984 Set_Scalar_Range (Standard_Unsigned, R_Node);
986 -- Note: universal integer and universal real are constructed as fully
987 -- formed signed numeric types, with parameters corresponding to the
988 -- longest runtime types (Long_Long_Integer and Long_Long_Float). This
989 -- allows Gigi to properly process references to universal types that
990 -- are not folded at compile time.
992 Universal_Integer := New_Standard_Entity;
993 Decl := New_Node (N_Full_Type_Declaration, Stloc);
994 Set_Defining_Identifier (Decl, Universal_Integer);
995 Make_Name (Universal_Integer, "universal_integer");
996 Set_Scope (Universal_Integer, Standard_Standard);
997 Build_Signed_Integer_Type
998 (Universal_Integer, Standard_Long_Long_Integer_Size);
1000 Universal_Real := New_Standard_Entity;
1001 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1002 Set_Defining_Identifier (Decl, Universal_Real);
1003 Make_Name (Universal_Real, "universal_real");
1004 Set_Scope (Universal_Real, Standard_Standard);
1007 Standard_Long_Long_Float_Size,
1008 Standard_Long_Long_Float_Digits);
1010 -- Note: universal fixed, unlike universal integer and universal real,
1011 -- is never used at runtime, so it does not need to have bounds set.
1013 Universal_Fixed := New_Standard_Entity;
1014 Decl := New_Node (N_Full_Type_Declaration, Stloc);
1015 Set_Defining_Identifier (Decl, Universal_Fixed);
1016 Make_Name (Universal_Fixed, "universal_fixed");
1017 Set_Ekind (Universal_Fixed, E_Ordinary_Fixed_Point_Type);
1018 Set_Etype (Universal_Fixed, Universal_Fixed);
1019 Set_Scope (Universal_Fixed, Standard_Standard);
1020 Init_Size (Universal_Fixed, Standard_Long_Long_Integer_Size);
1021 Set_Prim_Alignment (Universal_Fixed);
1022 Set_Size_Known_At_Compile_Time
1025 -- Create type declaration for Duration, using a 64-bit size. The
1026 -- delta and size values depend on the mode set in system.ads.
1028 Build_Duration : declare
1034 -- In 32 bit mode, the size is 32 bits, and the delta and
1035 -- small values are set to 20 milliseconds (20.0**(10.0**(-3)).
1037 if Duration_32_Bits_On_Target then
1038 Dlo := Intval (Type_Low_Bound (Standard_Integer_32));
1039 Dhi := Intval (Type_High_Bound (Standard_Integer_32));
1040 Delta_Val := UR_From_Components (UI_From_Int (20), Uint_3, 10);
1042 -- In standard 64-bit mode, the size is 64-bits and the delta and
1043 -- amll values are set to nanoseconds (1.0**(10.0**(-9))
1046 Dlo := Intval (Type_Low_Bound (Standard_Integer_64));
1047 Dhi := Intval (Type_High_Bound (Standard_Integer_64));
1048 Delta_Val := UR_From_Components (Uint_1, Uint_9, 10);
1051 Tdef_Node := Make_Ordinary_Fixed_Point_Definition (Stloc,
1052 Delta_Expression => Make_Real_Literal (Stloc, Delta_Val),
1053 Real_Range_Specification =>
1054 Make_Real_Range_Specification (Stloc,
1055 Low_Bound => Make_Real_Literal (Stloc,
1056 Realval => Dlo * Delta_Val),
1057 High_Bound => Make_Real_Literal (Stloc,
1058 Realval => Dhi * Delta_Val)));
1060 Set_Type_Definition (Parent (Standard_Duration), Tdef_Node);
1062 Set_Ekind (Standard_Duration, E_Ordinary_Fixed_Point_Type);
1063 Set_Etype (Standard_Duration, Standard_Duration);
1065 if Duration_32_Bits_On_Target then
1066 Init_Size (Standard_Duration, 32);
1068 Init_Size (Standard_Duration, 64);
1071 Set_Prim_Alignment (Standard_Duration);
1072 Set_Delta_Value (Standard_Duration, Delta_Val);
1073 Set_Small_Value (Standard_Duration, Delta_Val);
1074 Set_Scalar_Range (Standard_Duration,
1075 Real_Range_Specification
1076 (Type_Definition (Parent (Standard_Duration))));
1078 -- Normally it does not matter that nodes in package Standard are
1079 -- not marked as analyzed. The Scalar_Range of the fixed-point
1080 -- type Standard_Duration is an exception, because of the special
1081 -- test made in Freeze.Freeze_Fixed_Point_Type.
1083 Set_Analyzed (Scalar_Range (Standard_Duration));
1085 Set_Etype (Type_High_Bound (Standard_Duration), Standard_Duration);
1086 Set_Etype (Type_Low_Bound (Standard_Duration), Standard_Duration);
1088 Set_Is_Static_Expression (Type_High_Bound (Standard_Duration));
1089 Set_Is_Static_Expression (Type_Low_Bound (Standard_Duration));
1091 Set_Corresponding_Integer_Value
1092 (Type_High_Bound (Standard_Duration), Dhi);
1094 Set_Corresponding_Integer_Value
1095 (Type_Low_Bound (Standard_Duration), Dlo);
1097 Set_Size_Known_At_Compile_Time (Standard_Duration);
1100 -- Build standard exception type. Note that the type name here is
1101 -- actually used in the generated code, so it must be set correctly
1103 -- ??? Also note that the Import_Code component is now declared
1104 -- as a System.Standard_Library.Exception_Code to enforce run-time
1105 -- library implementation consistency. It's too early here to resort
1106 -- to rtsfind to get the proper node for that type, so we use the
1107 -- closest possible available type node at hand instead. We should
1108 -- probably be fixing this up at some point.
1110 Standard_Exception_Type := New_Standard_Entity;
1111 Set_Ekind (Standard_Exception_Type, E_Record_Type);
1112 Set_Etype (Standard_Exception_Type, Standard_Exception_Type);
1113 Set_Scope (Standard_Exception_Type, Standard_Standard);
1114 Set_Stored_Constraint
1115 (Standard_Exception_Type, No_Elist);
1116 Init_Size_Align (Standard_Exception_Type);
1117 Set_Size_Known_At_Compile_Time
1118 (Standard_Exception_Type, True);
1119 Make_Name (Standard_Exception_Type, "exception");
1121 Make_Component (Standard_Exception_Type, Standard_Boolean,
1122 "Not_Handled_By_Others");
1123 Make_Component (Standard_Exception_Type, Standard_Character, "Lang");
1124 Make_Component (Standard_Exception_Type, Standard_Natural,
1126 Make_Component (Standard_Exception_Type, Standard_A_Char,
1128 Make_Component (Standard_Exception_Type, Standard_A_Char,
1130 Make_Component (Standard_Exception_Type, Standard_Unsigned,
1132 Make_Component (Standard_Exception_Type, Standard_A_Char,
1134 -- Build tree for record declaration, for use by the back-end.
1137 Comp_List : List_Id;
1141 Comp := First_Entity (Standard_Exception_Type);
1142 Comp_List := New_List;
1144 while Present (Comp) loop
1146 Make_Component_Declaration (Stloc,
1147 Defining_Identifier => Comp,
1148 Component_Definition =>
1149 Make_Component_Definition (Stloc,
1150 Aliased_Present => False,
1151 Subtype_Indication => New_Occurrence_Of (Etype (Comp),
1158 Decl := Make_Full_Type_Declaration (Stloc,
1159 Defining_Identifier => Standard_Exception_Type,
1161 Make_Record_Definition (Stloc,
1164 Make_Component_List (Stloc,
1165 Component_Items => Comp_List)));
1168 Append (Decl, Decl_S);
1170 Layout_Type (Standard_Exception_Type);
1172 -- Create declarations of standard exceptions
1174 Build_Exception (S_Constraint_Error);
1175 Build_Exception (S_Program_Error);
1176 Build_Exception (S_Storage_Error);
1177 Build_Exception (S_Tasking_Error);
1179 -- Numeric_Error is a normal exception in Ada 83, but in Ada 95
1180 -- it is a renaming of Constraint_Error
1183 Build_Exception (S_Numeric_Error);
1186 Decl := New_Node (N_Exception_Renaming_Declaration, Stloc);
1187 E_Id := Standard_Entity (S_Numeric_Error);
1189 Set_Ekind (E_Id, E_Exception);
1190 Set_Exception_Code (E_Id, Uint_0);
1191 Set_Etype (E_Id, Standard_Exception_Type);
1192 Set_Is_Public (E_Id);
1193 Set_Renamed_Entity (E_Id, Standard_Entity (S_Constraint_Error));
1195 Set_Defining_Identifier (Decl, E_Id);
1196 Append (Decl, Decl_S);
1198 Ident_Node := New_Node (N_Identifier, Stloc);
1199 Set_Chars (Ident_Node, Chars (Standard_Entity (S_Constraint_Error)));
1200 Set_Entity (Ident_Node, Standard_Entity (S_Constraint_Error));
1201 Set_Name (Decl, Ident_Node);
1204 -- Abort_Signal is an entity that does not get made visible
1206 Abort_Signal := New_Standard_Entity;
1207 Set_Chars (Abort_Signal, Name_uAbort_Signal);
1208 Set_Ekind (Abort_Signal, E_Exception);
1209 Set_Exception_Code (Abort_Signal, Uint_0);
1210 Set_Etype (Abort_Signal, Standard_Exception_Type);
1211 Set_Scope (Abort_Signal, Standard_Standard);
1212 Set_Is_Public (Abort_Signal, True);
1214 Make_Exception_Declaration (Stloc,
1215 Defining_Identifier => Abort_Signal);
1217 -- Create defining identifiers for shift operator entities. Note
1218 -- that these entities are used only for marking shift operators
1219 -- generated internally, and hence need no structure, just a name
1220 -- and a unique identity.
1222 Standard_Op_Rotate_Left := New_Standard_Entity;
1223 Set_Chars (Standard_Op_Rotate_Left, Name_Rotate_Left);
1224 Set_Ekind (Standard_Op_Rotate_Left, E_Operator);
1226 Standard_Op_Rotate_Right := New_Standard_Entity;
1227 Set_Chars (Standard_Op_Rotate_Right, Name_Rotate_Right);
1228 Set_Ekind (Standard_Op_Rotate_Right, E_Operator);
1230 Standard_Op_Shift_Left := New_Standard_Entity;
1231 Set_Chars (Standard_Op_Shift_Left, Name_Shift_Left);
1232 Set_Ekind (Standard_Op_Shift_Left, E_Operator);
1234 Standard_Op_Shift_Right := New_Standard_Entity;
1235 Set_Chars (Standard_Op_Shift_Right, Name_Shift_Right);
1236 Set_Ekind (Standard_Op_Shift_Right, E_Operator);
1238 Standard_Op_Shift_Right_Arithmetic := New_Standard_Entity;
1239 Set_Chars (Standard_Op_Shift_Right_Arithmetic,
1240 Name_Shift_Right_Arithmetic);
1241 Set_Ekind (Standard_Op_Shift_Right_Arithmetic,
1244 -- Create standard operator declarations
1248 -- Initialize visibility table with entities in Standard
1250 for E in Standard_Entity_Type loop
1251 if Ekind (Standard_Entity (E)) /= E_Operator then
1253 (Chars (Standard_Entity (E)), Standard_Entity (E));
1254 Set_Homonym (Standard_Entity (E), Empty);
1257 if E not in S_ASCII_Names then
1258 Set_Scope (Standard_Entity (E), Standard_Standard);
1259 Set_Is_Immediately_Visible (Standard_Entity (E));
1263 -- The predefined package Standard itself does not have a scope;
1264 -- it is the only entity in the system not to have one, and this
1265 -- is what identifies the package to Gigi.
1267 Set_Scope (Standard_Standard, Empty);
1269 -- Set global variables indicating last Id values and version
1271 Last_Standard_Node_Id := Last_Node_Id;
1272 Last_Standard_List_Id := Last_List_Id;
1274 -- The Error node has an Etype of Any_Type to help error recovery
1276 Set_Etype (Error, Any_Type);
1278 -- Print representation of standard if switch set
1280 if Opt.Print_Standard then
1283 end Create_Standard;
1285 ------------------------------------
1286 -- Create_Unconstrained_Base_Type --
1287 ------------------------------------
1289 procedure Create_Unconstrained_Base_Type
1293 New_Ent : constant Entity_Id := New_Copy (E);
1297 Set_Is_Constrained (E, True);
1298 Set_Is_First_Subtype (E, True);
1299 Set_Etype (E, New_Ent);
1301 Append_Entity (New_Ent, Standard_Standard);
1302 Set_Is_Constrained (New_Ent, False);
1303 Set_Etype (New_Ent, New_Ent);
1304 Set_Is_Known_Valid (New_Ent, True);
1306 if K = E_Signed_Integer_Subtype then
1307 Set_Etype (Low_Bound (Scalar_Range (E)), New_Ent);
1308 Set_Etype (High_Bound (Scalar_Range (E)), New_Ent);
1311 end Create_Unconstrained_Base_Type;
1313 --------------------
1314 -- Identifier_For --
1315 --------------------
1317 function Identifier_For (S : Standard_Entity_Type) return Node_Id is
1318 Ident_Node : Node_Id;
1321 Ident_Node := New_Node (N_Identifier, Stloc);
1322 Set_Chars (Ident_Node, Chars (Standard_Entity (S)));
1326 --------------------
1327 -- Make_Component --
1328 --------------------
1330 procedure Make_Component
1335 Id : constant Entity_Id := New_Standard_Entity;
1338 Set_Ekind (Id, E_Component);
1339 Set_Etype (Id, Typ);
1340 Set_Scope (Id, Rec);
1341 Init_Component_Location (Id);
1343 Set_Original_Record_Component (Id, Id);
1344 Make_Name (Id, Nam);
1345 Append_Entity (Id, Rec);
1352 function Make_Formal
1354 Formal_Name : String) return Entity_Id
1359 Formal := New_Standard_Entity;
1361 Set_Ekind (Formal, E_In_Parameter);
1362 Set_Mechanism (Formal, Default_Mechanism);
1363 Set_Scope (Formal, Standard_Standard);
1364 Set_Etype (Formal, Typ);
1365 Make_Name (Formal, Formal_Name);
1374 function Make_Integer (V : Uint) return Node_Id is
1375 N : constant Node_Id := Make_Integer_Literal (Stloc, V);
1377 Set_Is_Static_Expression (N);
1385 procedure Make_Name (Id : Entity_Id; Nam : String) is
1387 for J in 1 .. Nam'Length loop
1388 Name_Buffer (J) := Fold_Lower (Nam (Nam'First + (J - 1)));
1391 Name_Len := Nam'Length;
1392 Set_Chars (Id, Name_Find);
1399 function New_Operator (Op : Name_Id; Typ : Entity_Id) return Entity_Id is
1400 Ident_Node : Entity_Id;
1403 Ident_Node := Make_Defining_Identifier (Stloc, Op);
1405 Set_Is_Pure (Ident_Node, True);
1406 Set_Ekind (Ident_Node, E_Operator);
1407 Set_Etype (Ident_Node, Typ);
1408 Set_Scope (Ident_Node, Standard_Standard);
1409 Set_Homonym (Ident_Node, Get_Name_Entity_Id (Op));
1410 Set_Convention (Ident_Node, Convention_Intrinsic);
1412 Set_Is_Immediately_Visible (Ident_Node, True);
1413 Set_Is_Intrinsic_Subprogram (Ident_Node, True);
1415 Set_Name_Entity_Id (Op, Ident_Node);
1416 Append_Entity (Ident_Node, Standard_Standard);
1420 -------------------------
1421 -- New_Standard_Entity --
1422 -------------------------
1424 function New_Standard_Entity
1425 (New_Node_Kind : Node_Kind := N_Defining_Identifier) return Entity_Id
1427 E : constant Entity_Id := New_Entity (New_Node_Kind, Stloc);
1430 -- All standard entities are Pure and Public
1435 -- All standard entity names are analyzed manually, and are thus
1436 -- frozen as soon as they are created.
1440 -- Set debug information required for all standard types
1442 Set_Needs_Debug_Info (E);
1444 -- All standard entities are built with fully qualified names, so
1445 -- set the flag to prevent an abortive attempt at requalification!
1447 Set_Has_Qualified_Name (E);
1449 -- Return newly created entity to be completed by caller
1452 end New_Standard_Entity;
1454 --------------------
1455 -- Print_Standard --
1456 --------------------
1458 procedure Print_Standard is
1460 procedure P (Item : String) renames Output.Write_Line;
1461 -- Short-hand, since we do a lot of line writes here!
1463 procedure P_Int_Range (Size : Pos);
1464 -- Prints the range of an integer based on its Size
1466 procedure P_Float_Range (Id : Entity_Id);
1467 -- Prints the bounds range for the given float type entity
1473 procedure P_Float_Range (Id : Entity_Id) is
1474 Digs : constant Nat := UI_To_Int (Digits_Value (Id));
1477 Write_Str (" range ");
1479 if Vax_Float (Id) then
1480 if Digs = VAXFF_Digits then
1481 Write_Str (VAXFF_First'Universal_Literal_String);
1483 Write_Str (VAXFF_Last'Universal_Literal_String);
1485 elsif Digs = VAXDF_Digits then
1486 Write_Str (VAXDF_First'Universal_Literal_String);
1488 Write_Str (VAXDF_Last'Universal_Literal_String);
1491 pragma Assert (Digs = VAXGF_Digits);
1493 Write_Str (VAXGF_First'Universal_Literal_String);
1495 Write_Str (VAXGF_Last'Universal_Literal_String);
1498 elsif Is_AAMP_Float (Id) then
1499 if Digs = AAMPS_Digits then
1500 Write_Str (AAMPS_First'Universal_Literal_String);
1502 Write_Str (AAMPS_Last'Universal_Literal_String);
1505 pragma Assert (Digs = AAMPL_Digits);
1506 Write_Str (AAMPL_First'Universal_Literal_String);
1508 Write_Str (AAMPL_Last'Universal_Literal_String);
1511 elsif Digs = IEEES_Digits then
1512 Write_Str (IEEES_First'Universal_Literal_String);
1514 Write_Str (IEEES_Last'Universal_Literal_String);
1516 elsif Digs = IEEEL_Digits then
1517 Write_Str (IEEEL_First'Universal_Literal_String);
1519 Write_Str (IEEEL_Last'Universal_Literal_String);
1522 pragma Assert (Digs = IEEEX_Digits);
1524 Write_Str (IEEEX_First'Universal_Literal_String);
1526 Write_Str (IEEEX_Last'Universal_Literal_String);
1537 procedure P_Int_Range (Size : Pos) is
1539 Write_Str (" is range -(2 **");
1540 Write_Int (Size - 1);
1542 Write_Str (" .. +(2 **");
1543 Write_Int (Size - 1);
1544 Write_Str (" - 1);");
1548 -- Start of processing for Print_Standard
1551 P ("-- Representation of package Standard");
1553 P ("-- This is not accurate Ada, since new base types cannot be ");
1554 P ("-- created, but the listing shows the target dependent");
1555 P ("-- characteristics of the Standard types for this compiler");
1558 P ("package Standard is");
1559 P ("pragma Pure(Standard);");
1562 P (" type Boolean is (False, True);");
1563 P (" for Boolean'Size use 1;");
1564 P (" for Boolean use (False => 0, True => 1);");
1569 Write_Str (" type Integer");
1570 P_Int_Range (Standard_Integer_Size);
1571 Write_Str (" for Integer'Size use ");
1572 Write_Int (Standard_Integer_Size);
1576 P (" subtype Natural is Integer range 0 .. Integer'Last;");
1577 P (" subtype Positive is Integer range 1 .. Integer'Last;");
1580 Write_Str (" type Short_Short_Integer");
1581 P_Int_Range (Standard_Short_Short_Integer_Size);
1582 Write_Str (" for Short_Short_Integer'Size use ");
1583 Write_Int (Standard_Short_Short_Integer_Size);
1587 Write_Str (" type Short_Integer");
1588 P_Int_Range (Standard_Short_Integer_Size);
1589 Write_Str (" for Short_Integer'Size use ");
1590 Write_Int (Standard_Short_Integer_Size);
1594 Write_Str (" type Long_Integer");
1595 P_Int_Range (Standard_Long_Integer_Size);
1596 Write_Str (" for Long_Integer'Size use ");
1597 Write_Int (Standard_Long_Integer_Size);
1601 Write_Str (" type Long_Long_Integer");
1602 P_Int_Range (Standard_Long_Long_Integer_Size);
1603 Write_Str (" for Long_Long_Integer'Size use ");
1604 Write_Int (Standard_Long_Long_Integer_Size);
1608 -- Floating point types
1610 Write_Str (" type Short_Float is digits ");
1611 Write_Int (Standard_Short_Float_Digits);
1613 P_Float_Range (Standard_Short_Float);
1614 Write_Str (" for Short_Float'Size use ");
1615 Write_Int (Standard_Short_Float_Size);
1619 Write_Str (" type Float is digits ");
1620 Write_Int (Standard_Float_Digits);
1622 P_Float_Range (Standard_Float);
1623 Write_Str (" for Float'Size use ");
1624 Write_Int (Standard_Float_Size);
1628 Write_Str (" type Long_Float is digits ");
1629 Write_Int (Standard_Long_Float_Digits);
1631 P_Float_Range (Standard_Long_Float);
1632 Write_Str (" for Long_Float'Size use ");
1633 Write_Int (Standard_Long_Float_Size);
1637 Write_Str (" type Long_Long_Float is digits ");
1638 Write_Int (Standard_Long_Long_Float_Digits);
1640 P_Float_Range (Standard_Long_Long_Float);
1641 Write_Str (" for Long_Long_Float'Size use ");
1642 Write_Int (Standard_Long_Long_Float_Size);
1646 P (" type Character is (...)");
1647 Write_Str (" for Character'Size use ");
1648 Write_Int (Standard_Character_Size);
1650 P (" -- See RM A.1(35) for details of this type");
1653 P (" type Wide_Character is (...)");
1654 Write_Str (" for Wide_Character'Size use ");
1655 Write_Int (Standard_Wide_Character_Size);
1657 P (" -- See RM A.1(36) for details of this type");
1660 P (" type String is array (Positive range <>) of Character;");
1661 P (" pragma Pack (String);");
1664 P (" type Wide_String is array (Positive range <>)" &
1665 " of Wide_Character;");
1666 P (" pragma Pack (Wide_String);");
1669 -- Here it's OK to use the Duration type of the host compiler since
1670 -- the implementation of Duration in GNAT is target independent.
1672 if Duration_32_Bits_On_Target then
1673 P (" type Duration is delta 0.020");
1674 P (" range -((2 ** 31 - 1) * 0.020) ..");
1675 P (" +((2 ** 31 - 1) * 0.020);");
1676 P (" for Duration'Small use 0.020;");
1678 P (" type Duration is delta 0.000000001");
1679 P (" range -((2 ** 63 - 1) * 0.000000001) ..");
1680 P (" +((2 ** 63 - 1) * 0.000000001);");
1681 P (" for Duration'Small use 0.000000001;");
1686 P (" Constraint_Error : exception;");
1687 P (" Program_Error : exception;");
1688 P (" Storage_Error : exception;");
1689 P (" Tasking_Error : exception;");
1690 P (" Numeric_Error : exception renames Constraint_Error;");
1693 P ("end Standard;");
1696 ----------------------
1697 -- Set_Float_Bounds --
1698 ----------------------
1700 procedure Set_Float_Bounds (Id : Entity_Id) is
1702 -- Low bound of literal value
1705 -- High bound of literal value
1708 -- Range specification
1710 Digs : constant Nat := UI_To_Int (Digits_Value (Id));
1711 -- Digits value, used to select bounds
1714 -- Note: for the call from Cstand to initially create the types in
1715 -- Standard, Vax_Float will always be False. Circuitry in Sem_Vfpt
1716 -- will adjust these types appropriately in the Vax_Float case if
1717 -- a pragma Float_Representation (VAX_Float) is used.
1719 if Vax_Float (Id) then
1720 if Digs = VAXFF_Digits then
1722 (VAXFF_First'Universal_Literal_String);
1724 (VAXFF_Last'Universal_Literal_String);
1726 elsif Digs = VAXDF_Digits then
1728 (VAXDF_First'Universal_Literal_String);
1730 (VAXDF_Last'Universal_Literal_String);
1733 pragma Assert (Digs = VAXGF_Digits);
1736 (VAXGF_First'Universal_Literal_String);
1738 (VAXGF_Last'Universal_Literal_String);
1741 elsif Is_AAMP_Float (Id) then
1742 if Digs = AAMPS_Digits then
1744 (AAMPS_First'Universal_Literal_String);
1746 (AAMPS_Last'Universal_Literal_String);
1749 pragma Assert (Digs = AAMPL_Digits);
1751 (AAMPL_First'Universal_Literal_String);
1753 (AAMPL_Last'Universal_Literal_String);
1756 elsif Digs = IEEES_Digits then
1758 (IEEES_First'Universal_Literal_String);
1760 (IEEES_Last'Universal_Literal_String);
1762 elsif Digs = IEEEL_Digits then
1764 (IEEEL_First'Universal_Literal_String);
1766 (IEEEL_Last'Universal_Literal_String);
1769 pragma Assert (Digs = IEEEX_Digits);
1772 (IEEEX_First'Universal_Literal_String);
1774 (IEEEX_Last'Universal_Literal_String);
1778 Set_Is_Static_Expression (L);
1781 Set_Is_Static_Expression (H);
1783 R := New_Node (N_Range, Stloc);
1784 Set_Low_Bound (R, L);
1785 Set_High_Bound (R, H);
1786 Set_Includes_Infinities (R, True);
1787 Set_Scalar_Range (Id, R);
1790 end Set_Float_Bounds;
1792 ------------------------
1793 -- Set_Integer_Bounds --
1794 ------------------------
1796 procedure Set_Integer_Bounds
1802 L : Node_Id; -- Low bound of literal value
1803 H : Node_Id; -- High bound of literal value
1804 R : Node_Id; -- Range specification
1807 L := Make_Integer (Lb);
1808 H := Make_Integer (Hb);
1813 R := New_Node (N_Range, Stloc);
1814 Set_Low_Bound (R, L);
1815 Set_High_Bound (R, H);
1816 Set_Scalar_Range (Id, R);
1819 Set_Is_Unsigned_Type (Id, Lb >= 0);
1820 end Set_Integer_Bounds;