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 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package contains the declarations of entities in package Standard,
35 -- These values are initialized either by calling CStand.Create_Standard,
36 -- or by calling Stand.Tree_Read.
38 with Types; use Types;
40 -- Do we really need the with of Namet?
42 pragma Warnings (Off);
43 with Namet; use Namet;
44 pragma Elaborate_All (Namet);
49 type Standard_Entity_Type is (
50 -- This enumeration type contains an entry for each name in Standard
57 -- Types defined in package Standard
66 S_Short_Short_Integer,
77 -- Enumeration literals for type Boolean
82 -- Subtypes declared in package Standard
87 -- Exceptions declared in package Standard
95 -- Binary Operators declared in package Standard.
116 -- Unary operators declared in package Standard
123 -- Constants defined in package ASCII (with value in hex).
124 -- First the thirty-two C0 control characters)
159 -- Here are the ones for Colonel Whitaker's O26 keypunch!
162 S_Quotation, -- 16#22#
166 S_Ampersand, -- 16#26#
169 S_Semicolon, -- 16#3B#
174 S_L_Bracket, -- 16#5B#
175 S_Back_Slash, -- 16#5C#
176 S_R_Bracket, -- 16#5D#
177 S_Circumflex, -- 16#5E#
178 S_Underline, -- 16#5F#
213 -- And one more control character, all on its own
218 Standard_Entity_Type range S_Boolean .. S_Long_Long_Float;
220 subtype S_Exceptions is
221 Standard_Entity_Type range S_Constraint_Error .. S_Tasking_Error;
223 subtype S_ASCII_Names is
224 Standard_Entity_Type range S_NUL .. S_DEL;
226 subtype S_Binary_Ops is
227 Standard_Entity_Type range S_Op_Add .. S_Op_Xor;
229 subtype S_Unary_Ops is
230 Standard_Entity_Type range S_Op_Abs .. S_Op_Plus;
232 type Standard_Entity_Array_Type is array (Standard_Entity_Type) of Node_Id;
234 Standard_Entity : Standard_Entity_Array_Type;
235 -- This array contains pointers to the Defining Identifier nodes
236 -- for each of the entities defined in Standard_Entities_Type. It
237 -- is initialized by the Create_Standard procedure.
239 Standard_Package_Node : Node_Id;
240 -- Points to the N_Package_Declaration node for standard. Also
241 -- initialized by the Create_Standard procedure.
243 -- The following Entities are the pointers to the Defining Identifier
244 -- nodes for some visible entities defined in Standard_Entities_Type.
246 SE : Standard_Entity_Array_Type renames Standard_Entity;
248 Standard_Standard : Entity_Id renames SE (S_Standard);
250 Standard_ASCII : Entity_Id renames SE (S_ASCII);
251 Standard_Character : Entity_Id renames SE (S_Character);
252 Standard_Wide_Character : Entity_Id renames SE (S_Wide_Character);
253 Standard_String : Entity_Id renames SE (S_String);
254 Standard_Wide_String : Entity_Id renames SE (S_Wide_String);
256 Standard_Boolean : Entity_Id renames SE (S_Boolean);
257 Standard_False : Entity_Id renames SE (S_False);
258 Standard_True : Entity_Id renames SE (S_True);
260 Standard_Duration : Entity_Id renames SE (S_Duration);
262 Standard_Natural : Entity_Id renames SE (S_Natural);
263 Standard_Positive : Entity_Id renames SE (S_Positive);
265 Standard_Constraint_Error : Entity_Id renames SE (S_Constraint_Error);
266 Standard_Numeric_Error : Entity_Id renames SE (S_Numeric_Error);
267 Standard_Program_Error : Entity_Id renames SE (S_Program_Error);
268 Standard_Storage_Error : Entity_Id renames SE (S_Storage_Error);
269 Standard_Tasking_Error : Entity_Id renames SE (S_Tasking_Error);
271 Standard_Short_Float : Entity_Id renames SE (S_Short_Float);
272 Standard_Float : Entity_Id renames SE (S_Float);
273 Standard_Long_Float : Entity_Id renames SE (S_Long_Float);
274 Standard_Long_Long_Float : Entity_Id renames SE (S_Long_Long_Float);
276 Standard_Short_Short_Integer : Entity_Id renames SE (S_Short_Short_Integer);
277 Standard_Short_Integer : Entity_Id renames SE (S_Short_Integer);
278 Standard_Integer : Entity_Id renames SE (S_Integer);
279 Standard_Long_Integer : Entity_Id renames SE (S_Long_Integer);
280 Standard_Long_Long_Integer : Entity_Id renames SE (S_Long_Long_Integer);
282 Standard_Op_Add : Entity_Id renames SE (S_Op_Add);
283 Standard_Op_And : Entity_Id renames SE (S_Op_And);
284 Standard_Op_Concat : Entity_Id renames SE (S_Op_Concat);
285 Standard_Op_Concatw : Entity_Id renames SE (S_Op_Concatw);
286 Standard_Op_Divide : Entity_Id renames SE (S_Op_Divide);
287 Standard_Op_Eq : Entity_Id renames SE (S_Op_Eq);
288 Standard_Op_Expon : Entity_Id renames SE (S_Op_Expon);
289 Standard_Op_Ge : Entity_Id renames SE (S_Op_Ge);
290 Standard_Op_Gt : Entity_Id renames SE (S_Op_Gt);
291 Standard_Op_Le : Entity_Id renames SE (S_Op_Le);
292 Standard_Op_Lt : Entity_Id renames SE (S_Op_Lt);
293 Standard_Op_Mod : Entity_Id renames SE (S_Op_Mod);
294 Standard_Op_Multiply : Entity_Id renames SE (S_Op_Multiply);
295 Standard_Op_Ne : Entity_Id renames SE (S_Op_Ne);
296 Standard_Op_Or : Entity_Id renames SE (S_Op_Or);
297 Standard_Op_Rem : Entity_Id renames SE (S_Op_Rem);
298 Standard_Op_Subtract : Entity_Id renames SE (S_Op_Subtract);
299 Standard_Op_Xor : Entity_Id renames SE (S_Op_Xor);
301 Standard_Op_Abs : Entity_Id renames SE (S_Op_Abs);
302 Standard_Op_Minus : Entity_Id renames SE (S_Op_Minus);
303 Standard_Op_Not : Entity_Id renames SE (S_Op_Not);
304 Standard_Op_Plus : Entity_Id renames SE (S_Op_Plus);
306 Last_Standard_Node_Id : Node_Id;
307 -- Highest Node_Id value used by Standard
309 Last_Standard_List_Id : List_Id;
310 -- Highest List_Id value used by Standard (including those used by
311 -- normal list headers, element list headers, and list elements)
313 Boolean_Literals : array (Boolean) of Entity_Id;
314 -- Entities for the two boolean literals, used by the expander
316 -------------------------------------
317 -- Semantic Phase Special Entities --
318 -------------------------------------
320 -- The semantic phase needs a number of entities for internal processing
321 -- that are logically at the level of Standard, and hence defined in this
322 -- package. However, they are never visible to a program, and are not
323 -- chained on to the Decls list of Standard. The names of all these
324 -- types are relevant only in certain debugging and error message
325 -- situations. They have names that are suitable for use in such
326 -- error messages (see body for actual names used).
328 Standard_Void_Type : Entity_Id;
329 -- This is a type used to represent the return type of procedures
331 Standard_Exception_Type : Entity_Id;
332 -- This is a type used to represent the Etype of exceptions.
334 Standard_A_String : Entity_Id;
335 -- An access to String type used for building elements of tables
336 -- carrying the enumeration literal names.
338 Standard_A_Char : Entity_Id;
339 -- Access to character, used as a component of the exception type to
340 -- denote a thin pointer component.
342 -- The entities labeled Any_xxx are used in situations where the full
343 -- characteristics of an entity are not yet known, e.g. Any_Character
344 -- is used to label a character literal before resolution is complete.
345 -- These entities are also used to construct appropriate references in
346 -- error messages ("expecting an integer type").
349 -- Used to represent some unknown identifier. Used to lable undefined
350 -- identifier references to prevent cascaded errors.
352 Any_Type : Entity_Id;
353 -- Used to represent some unknown type. Plays an important role in
354 -- avoiding cascaded errors, since any node that remains labaled with
355 -- this type corresponds to an already issued error message. Any_Type
356 -- is propagated to avoid cascaded errors from a single type error.
358 Any_Access : Entity_Id;
359 -- Used to resolve the overloaded literal NULL.
361 Any_Array : Entity_Id;
362 -- Used to represent some unknown array type
364 Any_Boolean : Entity_Id;
365 -- The context type of conditions in IF and WHILE statements.
367 Any_Character : Entity_Id;
368 -- Any_Character is used to label character literals, which in general
369 -- will not have an explicit declaration (this is true of the predefined
372 Any_Composite : Entity_Id;
373 -- The type Any_Composite is used for aggregates before type resolution.
374 -- It is compatible with any array or non-limited record type.
376 Any_Discrete : Entity_Id;
377 -- Used to represent some unknown discrete type
379 Any_Fixed : Entity_Id;
380 -- Used to represent some unknown fixed-point type
382 Any_Integer : Entity_Id;
383 -- Used to represent some unknown integer type.
385 Any_Modular : Entity_Id;
386 -- Used to represent the result type of a boolean operation on an
387 -- integer literal. The result is not Universal_Integer, because it is
388 -- only legal in a modular context.
390 Any_Numeric : Entity_Id;
391 -- Used to represent some unknown numeric type.
393 Any_Real : Entity_Id;
394 -- Used to represent some unknown real type.
396 Any_Scalar : Entity_Id;
397 -- Used to represent some unknown scalar type
399 Any_String : Entity_Id;
400 -- The type Any_String is used for string literals before type
401 -- resolution. It corresponds to array (Positive range <>) of character
402 -- where the component type is compatible with any character type,
403 -- not just Standard_Character.
405 Universal_Integer : Entity_Id;
406 -- Entity for universal integer type. The bounds of this type correspond
407 -- to the largest supported integer type (i.e. Long_Long_Integer). It is
408 -- the type used for runtime calculations in type universal integer.
410 Universal_Real : Entity_Id;
411 -- Entity for universal real type. The bounds of this type correspond to
412 -- to the largest supported real type (i.e. Long_Long_Real). It is the
413 -- type used for runtime calculations in type universal real.
415 Universal_Fixed : Entity_Id;
416 -- Entity for universal fixed type. This is a type with arbitrary
417 -- precision that can only appear in a context with a specific type.
418 -- Universal_Fixed labels the result of multiplication or division of
419 -- two fixed point numbers, and has no specified bounds (since, unlike
420 -- universal integer and universal real, it is never used for runtime
423 Standard_Integer_8 : Entity_Id;
424 Standard_Integer_16 : Entity_Id;
425 Standard_Integer_32 : Entity_Id;
426 Standard_Integer_64 : Entity_Id;
427 -- These are signed integer types with the indicated sizes, They are
428 -- used for the underlying implementation types for fixed-point and
429 -- enumeration types.
431 Standard_Unsigned : Entity_Id;
432 -- An unsigned type of the same size as Standard_Integer
434 Abort_Signal : Entity_Id;
435 -- Entity for abort signal exception
437 Standard_Op_Rotate_Left : Entity_Id;
438 Standard_Op_Rotate_Right : Entity_Id;
439 Standard_Op_Shift_Left : Entity_Id;
440 Standard_Op_Shift_Right : Entity_Id;
441 Standard_Op_Shift_Right_Arithmetic : Entity_Id;
442 -- These entities are used for shift operators generated by the expander
449 -- Initializes entity values in this package from the current tree
450 -- file using Osint.Tree_Read. Note that Tree_Read includes all the
451 -- initialization that is carried out by Create_Standard.
453 procedure Tree_Write;
454 -- Writes out the entity values in this package to the current
455 -- tree file using Osint.Tree_Write.