1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                              I M P U N I T                               --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--           Copyright (C) 2000-2012, 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
26with Atree;    use Atree;
27with Errout;   use Errout;
28with Sinfo;    use Sinfo;
29with Fname.UF; use Fname.UF;
30with Lib;      use Lib;
31with Namet;    use Namet;
32with Opt;      use Opt;
33with Uname;    use Uname;
34
35--  Note: this package body is used by GPS and GNATBench to supply a list of
36--  entries for help on available library routines.
37
38package body Impunit is
39
40   subtype File_Name_8 is String (1 .. 8);
41
42   type File_Name_Record is record
43      Fname : File_Name_8;
44      --  8 character name of unit
45
46      RMdef : Boolean;
47      --  True if unit is RM defined. False for any unit that is implementation
48      --  defined (and thus not with'able in No_Implementation_Units mode).
49   end record;
50
51   type File_List is array (Nat range <>) of File_Name_Record;
52
53   T : constant Boolean := True;
54   F : constant Boolean := False;
55   --  Short hand for RM_Defined values in lists below
56
57   ------------------
58   -- Ada 95 Units --
59   ------------------
60
61   --  The following is a giant string list containing the names of all non-
62   --  implementation internal files, i.e. the complete list of files for
63   --  internal units which a program may legitimately WITH when operating in
64   --  either Ada 95 or Ada 2005 mode.
65
66   --  Note that this list should match the list of units documented in the
67   --  "GNAT Library" section of the GNAT Reference Manual. A unit listed here
68   --  must either be documented in that section or described in the Ada RM.
69
70   Non_Imp_File_Names_95 : constant File_List := (
71
72   ------------------------------------------------------
73   -- Ada Hierarchy Units from Ada-95 Reference Manual --
74   ------------------------------------------------------
75
76    ("a-astaco", T),  -- Ada.Asynchronous_Task_Control
77    ("a-calend", T),  -- Ada.Calendar
78    ("a-chahan", T),  -- Ada.Characters.Handling
79    ("a-charac", T),  -- Ada.Characters
80    ("a-chlat1", T),  -- Ada.Characters.Latin_1
81    ("a-comlin", T),  -- Ada.Command_Line
82    ("a-decima", T),  -- Ada.Decimal
83    ("a-direio", T),  -- Ada.Direct_IO
84    ("a-dynpri", T),  -- Ada.Dynamic_Priorities
85    ("a-except", T),  -- Ada.Exceptions
86    ("a-finali", T),  -- Ada.Finalization
87    ("a-flteio", T),  -- Ada.Float_Text_IO
88    ("a-fwteio", T),  -- Ada.Float_Wide_Text_IO
89    ("a-inteio", T),  -- Ada.Integer_Text_IO
90    ("a-interr", T),  -- Ada.Interrupts
91    ("a-intnam", T),  -- Ada.Interrupts.Names
92    ("a-ioexce", T),  -- Ada.IO_Exceptions
93    ("a-iwteio", T),  -- Ada.Integer_Wide_Text_IO
94    ("a-ncelfu", T),  -- Ada.Numerics.Complex_Elementary_Functions
95    ("a-ngcefu", T),  -- Ada.Numerics.Generic_Complex_Elementary_Functions
96    ("a-ngcoty", T),  -- Ada.Numerics.Generic_Complex_Types
97    ("a-ngelfu", T),  -- Ada.Numerics.Generic_Elementary_Functions
98    ("a-nucoty", T),  -- Ada.Numerics.Complex_Types
99    ("a-nudira", T),  -- Ada.Numerics.Discrete_Random
100    ("a-nuelfu", T),  -- Ada.Numerics.Elementary_Functions
101    ("a-nuflra", T),  -- Ada.Numerics.Float_Random
102    ("a-numeri", T),  -- Ada.Numerics
103    ("a-reatim", T),  -- Ada.Real_Time
104    ("a-sequio", T),  -- Ada.Sequential_IO
105    ("a-stmaco", T),  -- Ada.Strings.Maps.Constants
106    ("a-storio", T),  -- Ada.Storage_IO
107    ("a-strbou", T),  -- Ada.Strings.Bounded
108    ("a-stream", T),  -- Ada.Streams
109    ("a-strfix", T),  -- Ada.Strings.Fixed
110    ("a-string", T),  -- Ada.Strings
111    ("a-strmap", T),  -- Ada.Strings.Maps
112    ("a-strunb", T),  -- Ada.Strings.Unbounded
113    ("a-ststio", T),  -- Ada.Streams.Stream_IO
114    ("a-stwibo", T),  -- Ada.Strings.Wide_Bounded
115    ("a-stwifi", T),  -- Ada.Strings.Wide_Fixed
116    ("a-stwima", T),  -- Ada.Strings.Wide_Maps
117    ("a-stwiun", T),  -- Ada.Strings.Wide_Unbounded
118    ("a-swmwco", T),  -- Ada.Strings.Wide_Maps.Wide_Constants
119    ("a-sytaco", T),  -- Ada.Synchronous_Task_Control
120    ("a-tags  ", T),  -- Ada.Tags
121    ("a-tasatt", T),  -- Ada.Task_Attributes
122    ("a-taside", T),  -- Ada.Task_Identification
123    ("a-teioed", T),  -- Ada.Text_IO.Editing
124    ("a-textio", T),  -- Ada.Text_IO
125    ("a-ticoio", T),  -- Ada.Text_IO.Complex_IO
126    ("a-titest", T),  -- Ada.Text_IO.Text_Streams
127    ("a-unccon", T),  -- Ada.Unchecked_Conversion
128    ("a-uncdea", T),  -- Ada.Unchecked_Deallocation
129    ("a-witeio", T),  -- Ada.Wide_Text_IO
130    ("a-wtcoio", T),  -- Ada.Wide_Text_IO.Complex_IO
131    ("a-wtedit", T),  -- Ada.Wide_Text_IO.Editing
132    ("a-wttest", T),  -- Ada.Wide_Text_IO.Text_Streams
133
134   -------------------------------------------------
135   -- RM Required Additions to Ada for GNAT Types --
136   -------------------------------------------------
137
138   --  Note: Long versions are considered RM defined, but not the Long Long,
139   --  Short, or Short_Short versions.
140
141    ("a-lfteio", T),  -- Ada.Long_Float_Text_IO
142    ("a-lfwtio", T),  -- Ada.Long_Float_Wide_Text_IO
143    ("a-liteio", T),  -- Ada.Long_Integer_Text_IO
144    ("a-liwtio", T),  -- Ada.Long_Integer_Wide_Text_IO
145    ("a-llftio", T),  -- Ada.Long_Long_Float_Text_IO
146    ("a-llfwti", T),  -- Ada.Long_Long_Float_Wide_Text_IO
147    ("a-llitio", T),  -- Ada.Long_Long_Integer_Text_IO
148    ("a-lliwti", F),  -- Ada.Long_Long_Integer_Wide_Text_IO
149    ("a-nlcefu", F),  -- Ada.Long_Complex_Elementary_Functions
150    ("a-nlcoty", T),  -- Ada.Numerics.Long_Complex_Types
151    ("a-nlelfu", T),  -- Ada.Numerics.Long_Elementary_Functions
152    ("a-nllcef", F),  -- Ada.Long_Long_Complex_Elementary_Functions
153    ("a-nllefu", F),  -- Ada.Numerics.Long_Long_Elementary_Functions
154    ("a-nllcty", F),  -- Ada.Numerics.Long_Long_Complex_Types
155    ("a-nscefu", F),  -- Ada.Short_Complex_Elementary_Functions
156    ("a-nscoty", F),  -- Ada.Numerics.Short_Complex_Types
157    ("a-nselfu", F),  -- Ada.Numerics.Short_Elementary_Functions
158    ("a-sfteio", F),  -- Ada.Short_Float_Text_IO
159    ("a-sfwtio", F),  -- Ada.Short_Float_Wide_Text_IO
160    ("a-siteio", F),  -- Ada.Short_Integer_Text_IO
161    ("a-siwtio", F),  -- Ada.Short_Integer_Wide_Text_IO
162    ("a-ssitio", F),  -- Ada.Short_Short_Integer_Text_IO
163    ("a-ssiwti", F),  -- Ada.Short_Short_Integer_Wide_Text_IO
164
165   -----------------------------------
166   -- GNAT Defined Additions to Ada --
167   -----------------------------------
168
169    ("a-calcon", F),  -- Ada.Calendar.Conversions
170    ("a-chlat9", F),  -- Ada.Characters.Latin_9
171    ("a-clrefi", F),  -- Ada.Command_Line.Response_File
172    ("a-colien", F),  -- Ada.Command_Line.Environment
173    ("a-colire", F),  -- Ada.Command_Line.Remove
174    ("a-cwila1", F),  -- Ada.Characters.Wide_Latin_1
175    ("a-cwila9", F),  -- Ada.Characters.Wide_Latin_9
176    ("a-diocst", F),  -- Ada.Direct_IO.C_Streams
177    ("a-einuoc", F),  -- Ada.Exceptions.Is_Null_Occurrence
178    ("a-elchha", F),  -- Ada.Exceptions.Last_Chance_Handler
179    ("a-exctra", F),  -- Ada.Exceptions.Traceback
180    ("a-siocst", F),  -- Ada.Sequential_IO.C_Streams
181    ("a-ssicst", F),  -- Ada.Streams.Stream_IO.C_Streams
182    ("a-suteio", F),  -- Ada.Strings.Unbounded.Text_IO
183    ("a-swuwti", F),  -- Ada.Strings.Wide_Unbounded.Wide_Text_IO
184    ("a-tiocst", F),  -- Ada.Text_IO.C_Streams
185    ("a-wtcstr", F),  -- Ada.Wide_Text_IO.C_Streams
186
187      --  Note: strictly the next two should be Ada 2005 units, but it seems
188      --  harmless (and useful) to make then available in Ada 95 mode, since
189      --  they only deal with Wide_Character, not Wide_Wide_Character.
190
191    ("a-wichun", F),  -- Ada.Wide_Characters.Unicode
192    ("a-widcha", F),  -- Ada.Wide_Characters
193
194      --  Note: strictly the following should be Ada 2012 units, but it seems
195      --  harmless (and useful) to make then available in Ada 95 mode, since
196      --  they do not deal with Wide_Wide_Character.
197
198    ("a-wichha", F),  -- Ada.Wide_Characters.Handling
199    ("a-stuten", F),  -- Ada.Strings.UTF_Encoding
200    ("a-suenco", F),  -- Ada.Strings.UTF_Encoding.Conversions
201    ("a-suenst", F),  -- Ada.Strings.UTF_Encoding.Strings
202    ("a-suewst", F),  -- Ada.Strings.UTF_Encoding.Wide_Strings
203
204   ---------------------------
205   -- GNAT Special IO Units --
206   ---------------------------
207
208   --  As further explained elsewhere (see Sem_Ch10), the internal packages of
209   --  Text_IO and Wide_Text_IO are actually implemented as separate children,
210   --  but this fact is intended to be hidden from the user completely. Any
211   --  attempt to WITH one of these units will be diagnosed as an error later
212   --  on, but for now we do not consider these internal implementation units
213   --  (if we did, then we would get a junk warning which would be confusing
214   --  and unnecessary, given that we generate a clear error message).
215
216    ("a-tideio", F),  -- Ada.Text_IO.Decimal_IO
217    ("a-tienio", F),  -- Ada.Text_IO.Enumeration_IO
218    ("a-tifiio", F),  -- Ada.Text_IO.Fixed_IO
219    ("a-tiflio", F),  -- Ada.Text_IO.Float_IO
220    ("a-tiinio", F),  -- Ada.Text_IO.Integer_IO
221    ("a-tiinio", F),  -- Ada.Text_IO.Integer_IO
222    ("a-timoio", F),  -- Ada.Text_IO.Modular_IO
223    ("a-wtdeio", F),  -- Ada.Wide_Text_IO.Decimal_IO
224    ("a-wtenio", F),  -- Ada.Wide_Text_IO.Enumeration_IO
225    ("a-wtfiio", F),  -- Ada.Wide_Text_IO.Fixed_IO
226    ("a-wtflio", F),  -- Ada.Wide_Text_IO.Float_IO
227    ("a-wtinio", F),  -- Ada.Wide_Text_IO.Integer_IO
228    ("a-wtmoio", F),  -- Ada.Wide_Text_IO.Modular_IO
229
230   ------------------------
231   -- GNAT Library Units --
232   ------------------------
233
234    ("g-altive", F),  -- GNAT.Altivec
235    ("g-altcon", F),  -- GNAT.Altivec.Conversions
236    ("g-alveop", F),  -- GNAT.Altivec.Vector_Operations
237    ("g-alvety", F),  -- GNAT.Altivec.Vector_Types
238    ("g-alvevi", F),  -- GNAT.Altivec.Vector_Views
239    ("g-arrspl", F),  -- GNAT.Array_Split
240    ("g-awk   ", F),  -- GNAT.AWK
241    ("g-boubuf", F),  -- GNAT.Bounded_Buffers
242    ("g-boumai", F),  -- GNAT.Bounded_Mailboxes
243    ("g-bubsor", F),  -- GNAT.Bubble_Sort
244    ("g-busora", F),  -- GNAT.Bubble_Sort_A
245    ("g-busorg", F),  -- GNAT.Bubble_Sort_G
246    ("g-byorma", F),  -- GNAT.Byte_Order_Mark
247    ("g-bytswa", F),  -- GNAT.Byte_Swapping
248    ("g-calend", F),  -- GNAT.Calendar
249    ("g-catiio", F),  -- GNAT.Calendar.Time_IO
250    ("g-casuti", F),  -- GNAT.Case_Util
251    ("g-cgi   ", F),  -- GNAT.CGI
252    ("g-cgicoo", F),  -- GNAT.CGI.Cookie
253    ("g-cgideb", F),  -- GNAT.CGI.Debug
254    ("g-comlin", F),  -- GNAT.Command_Line
255    ("g-comver", F),  -- GNAT.Compiler_Version
256    ("g-crc32 ", F),  -- GNAT.CRC32
257    ("g-ctrl_c", F),  -- GNAT.Ctrl_C
258    ("g-curexc", F),  -- GNAT.Current_Exception
259    ("g-debpoo", F),  -- GNAT.Debug_Pools
260    ("g-debuti", F),  -- GNAT.Debug_Utilities
261    ("g-decstr", F),  -- GNAT.Decode_String
262    ("g-deutst", F),  -- GNAT.Decode_UTF8_String
263    ("g-dirope", F),  -- GNAT.Directory_Operations
264    ("g-diopit", F),  -- GNAT.Directory_Operations.Iteration
265    ("g-dynhta", F),  -- GNAT.Dynamic_HTables
266    ("g-dyntab", F),  -- GNAT.Dynamic_Tables
267    ("g-encstr", F),  -- GNAT.Encode_String
268    ("g-enutst", F),  -- GNAT.Encode_UTF8_String
269    ("g-excact", F),  -- GNAT.Exception_Actions
270    ("g-except", F),  -- GNAT.Exceptions
271    ("g-exctra", F),  -- GNAT.Exception_Traces
272    ("g-expect", F),  -- GNAT.Expect
273    ("g-exptty", F),  -- GNAT.Expect.TTY
274    ("g-flocon", F),  -- GNAT.Float_Control
275    ("g-heasor", F),  -- GNAT.Heap_Sort
276    ("g-hesora", F),  -- GNAT.Heap_Sort_A
277    ("g-hesorg", F),  -- GNAT.Heap_Sort_G
278    ("g-htable", F),  -- GNAT.Htable
279    ("g-io    ", F),  -- GNAT.IO
280    ("g-io_aux", F),  -- GNAT.IO_Aux
281    ("g-locfil", F),  -- GNAT.Lock_Files
282    ("g-mbdira", F),  -- GNAT.MBBS_Discrete_Random
283    ("g-mbflra", F),  -- GNAT.MBBS_Float_Random
284    ("g-md5   ", F),  -- GNAT.MD5
285    ("g-memdum", F),  -- GNAT.Memory_Dump
286    ("g-moreex", F),  -- GNAT.Most_Recent_Exception
287    ("g-os_lib", F),  -- GNAT.Os_Lib
288    ("g-pehage", F),  -- GNAT.Perfect_Hash_Generators
289    ("g-rannum", F),  -- GNAT.Random_Numbers
290    ("g-regexp", F),  -- GNAT.Regexp
291    ("g-regist", F),  -- GNAT.Registry
292    ("g-regpat", F),  -- GNAT.Regpat
293    ("g-semaph", F),  -- GNAT.Semaphores
294    ("g-sercom", F),  -- GNAT.Serial_Communications
295    ("g-sestin", F),  -- GNAT.Secondary_Stack_Info
296    ("g-sha1  ", F),  -- GNAT.SHA1
297    ("g-sha224", F),  -- GNAT.SHA224
298    ("g-sha256", F),  -- GNAT.SHA256
299    ("g-sha384", F),  -- GNAT.SHA384
300    ("g-sha512", F),  -- GNAT.SHA512
301    ("g-signal", F),  -- GNAT.Signals
302    ("g-socket", F),  -- GNAT.Sockets
303    ("g-souinf", F),  -- GNAT.Source_Info
304    ("g-speche", F),  -- GNAT.Spell_Checker
305    ("g-spchge", F),  -- GNAT.Spell_Checker_Generic
306    ("g-spitbo", F),  -- GNAT.Spitbol
307    ("g-spipat", F),  -- GNAT.Spitbol.Patterns
308    ("g-sptabo", F),  -- GNAT.Spitbol.Table_Boolean
309    ("g-sptain", F),  -- GNAT.Spitbol.Table_Integer
310    ("g-sptavs", F),  -- GNAT.Spitbol.Table_Vstring
311    ("g-string", F),  -- GNAT.Strings
312    ("g-strspl", F),  -- GNAT.String_Split
313    ("g-sse   ", F),  -- GNAT.SSE
314    ("g-ssvety", F),  -- GNAT.SSE.Vector_Types
315    ("g-table ", F),  -- GNAT.Table
316    ("g-tasloc", F),  -- GNAT.Task_Lock
317    ("g-tastus", F),  -- GNAT.Task_Stack_Usage
318    ("g-thread", F),  -- GNAT.Threads
319    ("g-timsta", F),  -- GNAT.Time_Stamp
320    ("g-traceb", F),  -- GNAT.Traceback
321    ("g-trasym", F),  -- GNAT.Traceback.Symbolic
322    ("g-tty   ", F),  -- GNAT.TTY
323    ("g-utf_32", F),  -- GNAT.UTF_32
324    ("g-u3spch", F),  -- GNAT.UTF_32_Spelling_Checker
325    ("g-wispch", F),  -- GNAT.Wide_Spelling_Checker
326    ("g-wistsp", F),  -- GNAT.Wide_String_Split
327
328   -----------------------------------------------------
329   -- Interface Hierarchy Units from Reference Manual --
330   -----------------------------------------------------
331
332    ("i-c     ", T),  -- Interfaces.C
333    ("i-cobol ", T),  -- Interfaces.Cobol
334    ("i-cpoint", T),  -- Interfaces.C.Pointers
335    ("i-cstrin", T),  -- Interfaces.C.Strings
336    ("i-fortra", T),  -- Interfaces.Fortran
337
338   ------------------------------------------
339   -- GNAT Defined Additions to Interfaces --
340   ------------------------------------------
341
342    ("i-cexten", F),  -- Interfaces.C.Extensions
343    ("i-cil   ", F),  -- Interfaces.CIL
344    ("i-cilobj", F),  -- Interfaces.CIL.Object
345    ("i-cpp   ", F),  -- Interfaces.CPP
346    ("i-cstrea", F),  -- Interfaces.C.Streams
347    ("i-java  ", F),  -- Interfaces.Java
348    ("i-javjni", F),  -- Interfaces.Java.JNI
349    ("i-pacdec", F),  -- Interfaces.Packed_Decimal
350    ("i-vxwoio", F),  -- Interfaces.VxWorks.IO
351    ("i-vxwork", F),  -- Interfaces.VxWorks
352
353   --------------------------------------------------
354   -- System Hierarchy Units from Reference Manual --
355   --------------------------------------------------
356
357    ("s-atacco", T),  -- System.Address_To_Access_Conversions
358    ("s-maccod", T),  -- System.Machine_Code
359    ("s-rpc   ", T),  -- System.Rpc
360    ("s-stoele", T),  -- System.Storage_Elements
361    ("s-stopoo", T),  -- System.Storage_Pools
362
363   --------------------------------------
364   -- GNAT Defined Additions to System --
365   --------------------------------------
366
367    ("s-addima", F),  -- System.Address_Image
368    ("s-assert", F),  -- System.Assertions
369    ("s-diflio", F),  -- System.Dim.Float_IO
370    ("s-diinio", F),  -- System.Dim.Integer_IO
371    ("s-dimkio", F),  -- System.Dim.Mks_IO
372    ("s-dimmks", F),  -- System.Dim.Mks
373    ("s-dmotpr", F),  -- System.Dim.Mks.Other_Prefixes
374    ("s-memory", F),  -- System.Memory
375    ("s-parint", F),  -- System.Partition_Interface
376    ("s-pooglo", F),  -- System.Pool_Global
377    ("s-pooloc", F),  -- System.Pool_Local
378    ("s-restri", F),  -- System.Restrictions
379    ("s-rident", F),  -- System.Rident
380    ("s-ststop", F),  -- System.Strings.Stream_Ops
381    ("s-tasinf", F),  -- System.Task_Info
382    ("s-wchcnv", F),  -- System.Wch_Cnv
383    ("s-wchcon", F)); -- System.Wch_Con
384
385   --------------------
386   -- Ada 2005 Units --
387   --------------------
388
389   --  The following units should be used only in Ada 05 mode
390
391   Non_Imp_File_Names_05 : constant File_List := (
392
393   --------------------------------------------------------
394   -- Ada Hierarchy Units from Ada 2005 Reference Manual --
395   --------------------------------------------------------
396
397    ("a-assert", T),  -- Ada.Assertions
398    ("a-calari", T),  -- Ada.Calendar.Arithmetic
399    ("a-calfor", T),  -- Ada.Calendar.Formatting
400    ("a-catizo", T),  -- Ada.Calendar.Time_Zones
401    ("a-cdlili", T),  -- Ada.Containers.Doubly_Linked_Lists
402    ("a-cgarso", T),  -- Ada.Containers.Generic_Array_Sort
403    ("a-cgcaso", T),  -- Ada.Containers.Generic_Constrained_Array_Sort
404    ("a-chacon", T),  -- Ada.Characters.Conversions
405    ("a-cidlli", T),  -- Ada.Containers.Indefinite_Doubly_Linked_Lists
406    ("a-cihama", T),  -- Ada.Containers.Indefinite_Hashed_Maps
407    ("a-cihase", T),  -- Ada.Containers.Indefinite_Hashed_Sets
408    ("a-ciorma", T),  -- Ada.Containers.Indefinite_Ordered_Maps
409    ("a-ciorse", T),  -- Ada.Containers.Indefinite_Ordered_Sets
410    ("a-cohama", T),  -- Ada.Containers.Hashed_Maps
411    ("a-cohase", T),  -- Ada.Containers.Hashed_Sets
412    ("a-coinve", T),  -- Ada.Containers.Indefinite_Vectors
413    ("a-contai", T),  -- Ada.Containers
414    ("a-convec", T),  -- Ada.Containers.Vectors
415    ("a-coorma", T),  -- Ada.Containers.Ordered_Maps
416    ("a-coorse", T),  -- Ada.Containers.Ordered_Sets
417    ("a-coteio", T),  -- Ada.Complex_Text_IO
418    ("a-direct", T),  -- Ada.Directories
419    ("a-diroro", T),  -- Ada.Dispatching.Round_Robin
420    ("a-disedf", T),  -- Ada.Dispatching.EDF
421    ("a-dispat", T),  -- Ada.Dispatching
422    ("a-envvar", T),  -- Ada.Environment_Variables
423    ("a-etgrbu", T),  -- Ada.Execution_Time.Group_Budgets
424    ("a-exetim", T),  -- Ada.Execution_Time
425    ("a-extiti", T),  -- Ada.Execution_Time.Timers
426    ("a-izteio", T),  -- Ada.Integer_Wide_Wide_Text_IO
427    ("a-rttiev", T),  -- Ada.Real_Time.Timing_Events
428    ("a-ngcoar", T),  -- Ada.Numerics.Generic_Complex_Arrays
429    ("a-ngrear", T),  -- Ada.Numerics.Generic_Real_Arrays
430    ("a-nucoar", T),  -- Ada.Numerics.Complex_Arrays
431    ("a-nurear", T),  -- Ada.Numerics.Real_Arrays
432    ("a-stboha", T),  -- Ada.Strings.Bounded.Hash
433    ("a-stfiha", T),  -- Ada.Strings.Fixed.Hash
434    ("a-strhas", T),  -- Ada.Strings.Hash
435    ("a-stunha", T),  -- Ada.Strings.Unbounded.Hash
436    ("a-stwiha", T),  -- Ada.Strings.Wide_Hash
437    ("a-stzbou", T),  -- Ada.Strings.Wide_Wide_Bounded
438    ("a-stzfix", T),  -- Ada.Strings.Wide_Wide_Fixed
439    ("a-stzhas", T),  -- Ada.Strings.Wide_Wide_Hash
440    ("a-stzmap", T),  -- Ada.Strings.Wide_Wide_Maps
441    ("a-stzunb", T),  -- Ada.Strings.Wide_Wide_Unbounded
442    ("a-swbwha", T),  -- Ada.Strings.Wide_Bounded.Wide_Hash
443    ("a-swfwha", T),  -- Ada.Strings.Wide_Fixed.Wide_Hash
444    ("a-swuwha", T),  -- Ada.Strings.Wide_Unbounded.Wide_Hash
445    ("a-szbzha", T),  -- Ada.Strings.Wide_Wide_Bounded.Wide_Wide_Hash
446    ("a-szfzha", T),  -- Ada.Strings.Wide_Wide_Fixed.Wide_Wide_Hash
447    ("a-szmzco", T),  -- Ada.Strings.Wide_Wide_Maps.Wide_Wide_Constants
448    ("a-szuzha", T),  -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Hash
449    ("a-taster", T),  -- Ada.Task_Termination
450    ("a-tgdico", T),  -- Ada.Tags.Generic_Dispatching_Constructor
451    ("a-tiboio", T),  -- Ada.Text_IO.Bounded_IO
452    ("a-tiunio", T),  -- Ada.Text_IO.Unbounded_IO
453    ("a-wichun", T),  -- Ada.Wide_Characters.Unicode
454    ("a-wwboio", T),  -- Ada.Wide_Text_IO.Wide_Bounded_IO
455    ("a-wwunio", T),  -- Ada.Wide_Text_IO.Wide_Unbounded_IO
456    ("a-zchara", T),  -- Ada.Wide_Wide_Characters
457    ("a-zchhan", T),  -- Ada.Wide_Wide_Characters.Handling
458    ("a-ztcoio", T),  -- Ada.Wide_Wide_Text_IO.Complex_IO
459    ("a-ztedit", T),  -- Ada.Wide_Wide_Text_IO.Editing
460    ("a-zttest", T),  -- Ada.Wide_Wide_Text_IO.Text_Streams
461    ("a-ztexio", T),  -- Ada.Wide_Wide_Text_IO
462    ("a-zzboio", T),  -- Ada.Wide_Wide_Text_IO.Wide_Wide_Bounded_IO
463    ("a-zzunio", T),  -- Ada.Wide_Wide_Text_IO.Wide_Wide_Unbounded_IO
464
465   ------------------------------------------------------
466   -- RM Required Additions to Ada 2005 for GNAT Types --
467   ------------------------------------------------------
468
469   --  Note: Long versions are considered RM defined, but not the Long Long,
470   --  Short, or Short_Short versions.
471
472    ("a-lcteio", T),  -- Ada.Long_Complex_Text_IO
473    ("a-lfztio", T),  -- Ada.Long_Float_Wide_Wide_Text_IO
474    ("a-liztio", T),  -- Ada.Long_Integer_Wide_Wide_Text_IO
475    ("a-llctio", T),  -- Ada.Long_Long_Complex_Text_IO
476    ("a-llfzti", T),  -- Ada.Long_Long_Float_Wide_Wide_Text_IO
477    ("a-llizti", T),  -- Ada.Long_Long_Integer_Wide_Wide_Text_IO
478    ("a-nlcoar", T),  -- Ada.Numerics.Long_Complex_Arrays
479    ("a-nllcar", T),  -- Ada.Numerics.Long_Long_Complex_Arrays
480    ("a-nllrar", T),  -- Ada.Numerics.Long_Long_Real_Arrays
481    ("a-nlrear", T),  -- Ada.Numerics.Long_Real_Arrays
482    ("a-scteio", F),  -- Ada.Short_Complex_Text_IO
483    ("a-sfztio", F),  -- Ada.Short_Float_Wide_Wide_Text_IO
484    ("a-siztio", F),  -- Ada.Short_Integer_Wide_Wide_Text_IO
485    ("a-ssizti", F),  -- Ada.Short_Short_Integer_Wide_Wide_Text_IO
486
487   ----------------------------------------
488   -- GNAT Defined Additions to Ada 2005 --
489   ----------------------------------------
490
491    ("a-cgaaso", F),  -- Ada.Containers.Generic_Anonymous_Array_Sort
492    ("a-chzla1", F),  -- Ada.Characters.Wide_Wide_Latin_1
493    ("a-chzla9", F),  -- Ada.Characters.Wide_Wide_Latin_9
494    ("a-ciormu", F),  -- Ada.Containers.Indefinite_Ordered_Multisets
495    ("a-coormu", F),  -- Ada.Containers.Ordered_Multisets
496    ("a-crdlli", F),  -- Ada.Containers.Restricted_Doubly_Linked_Lists
497    ("a-szuzti", F),  -- Ada.Strings.Wide_Wide_Unbounded.Wide_Wide_Text_IO
498    ("a-zchuni", F),  -- Ada.Wide_Wide_Characters.Unicode
499    ("a-ztcstr", F),  -- Ada.Wide_Wide_Text_IO.C_Streams
500
501      --  Note: strictly the following should be Ada 2012 units, but it seems
502      --  harmless (and useful) to make then available in Ada 2005 mode.
503
504    ("a-cogeso", T),  -- Ada.Containers.Generic_Sort
505    ("a-secain", T),  -- Ada.Strings.Equal_Case_Insensitive
506    ("a-shcain", T),  -- Ada.Strings.Hash_Case_Insensitive
507    ("a-slcain", T),  -- Ada.Strings.Less_Case_Insensitive
508    ("a-sfecin", T),  -- Ada.Strings.Fixed.Equal_Case_Insensitive
509    ("a-sfhcin", T),  -- Ada.Strings.Fixed.Hash_Case_Insensitive
510    ("a-sflcin", T),  -- Ada.Strings.Fixed.Less_Case_Insensitive
511    ("a-sbecin", T),  -- Ada.Strings.Bounded.Equal_Case_Insensitive
512    ("a-sbhcin", T),  -- Ada.Strings.Bounded.Hash_Case_Insensitive
513    ("a-sblcin", T),  -- Ada.Strings.Bounded.Less_Case_Insensitive
514    ("a-suecin", T),  -- Ada.Strings.Unbounded.Equal_Case_Insensitive
515    ("a-suhcin", T),  -- Ada.Strings.Unbounded.Hash_Case_Insensitive
516    ("a-sulcin", T),  -- Ada.Strings.Unbounded.Less_Case_Insensitive
517    ("a-suezst", T),  -- Ada.Strings.UTF_Encoding.Wide_Wide_Strings
518
519   ---------------------------
520   -- GNAT Special IO Units --
521   ---------------------------
522
523   --  See Ada 95 section for further information. These packages are for the
524   --  implementation of the Wide_Wide_Text_IO generic packages.
525
526    ("a-ztdeio", F),  -- Ada.Wide_Wide_Text_IO.Decimal_IO
527    ("a-ztenio", F),  -- Ada.Wide_Wide_Text_IO.Enumeration_IO
528    ("a-ztfiio", F),  -- Ada.Wide_Wide_Text_IO.Fixed_IO
529    ("a-ztflio", F),  -- Ada.Wide_Wide_Text_IO.Float_IO
530    ("a-ztinio", F),  -- Ada.Wide_Wide_Text_IO.Integer_IO
531    ("a-ztmoio", F),  -- Ada.Wide_Wide_Text_IO.Modular_IO
532
533   ------------------------
534   -- GNAT Library Units --
535   ------------------------
536
537    ("g-zspche", F),  -- GNAT.Wide_Wide_Spelling_Checker
538    ("g-zstspl", F)); -- GNAT.Wide_Wide_String_Split
539
540   --------------------
541   -- Ada 2012 Units --
542   --------------------
543
544   --  The following units should be used only in Ada 2012 mode
545
546   Non_Imp_File_Names_12 : constant File_List := (
547    ("s-multip", T),  -- System.Multiprocessors
548    ("s-mudido", T),  -- System.Multiprocessors.Dispatching_Domains
549    ("s-stposu", T),  -- System.Storage_Pools.Subpools
550    ("a-cobove", T),  -- Ada.Containers.Bounded_Vectors
551    ("a-cbdlli", T),  -- Ada.Containers.Bounded_Doubly_Linked_Lists
552    ("a-cborse", T),  -- Ada.Containers.Bounded_Ordered_Sets
553    ("a-cborma", T),  -- Ada.Containers.Bounded_Ordered_Maps
554    ("a-cbhase", T),  -- Ada.Containers.Bounded_Hashed_Sets
555    ("a-cbhama", T),  -- Ada.Containers.Bounded_Hashed_Maps
556    ("a-coinho", T),  -- Ada.Containers.Indefinite_Holders
557    ("a-comutr", T),  -- Ada.Containers.Multiway_Trees
558    ("a-cimutr", T),  -- Ada.Containers.Indefinite_Multiway_Trees
559    ("a-cbmutr", T),  -- Ada.Containers.Bounded_Multiway_Trees
560    ("a-csquin", T),  -- Ada.Containers.Synchronized_Queue_Interfaces
561    ("a-cusyqu", T),  -- Ada.Containers.Unbounded_Synchronized_Queues
562    ("a-cuprqu", T),  -- Ada.Containers.Unbounded_Priority_Queues
563    ("a-cbsyqu", T),  -- Ada.Containers.Bounded_Synchronized_Queues
564    ("a-cbprqu", T),  -- Ada.Containers.Bounded_Priority_Queues
565    ("a-extiin", T),  -- Ada.Execution_Time.Interrupts
566    ("a-iteint", T),  -- Ada.Iterator_Interfaces
567    ("a-locale", T),  -- Ada.Locales
568    ("a-synbar", T),  -- Ada.Synchronous_Barriers
569    ("a-undesu", T),  -- Ada.Unchecked_Deallocate_Subpool
570
571   ----------------------------------------
572   -- GNAT Defined Additions to Ada 2012 --
573   ----------------------------------------
574
575    ("a-cofove", F),  -- Ada.Containers.Formal_Vectors
576    ("a-cfdlli", F),  -- Ada.Containers.Formal_Doubly_Linked_Lists
577    ("a-cforse", F),  -- Ada.Containers.Formal_Ordered_Sets
578    ("a-cforma", F),  -- Ada.Containers.Formal_Ordered_Maps
579    ("a-cfhase", F),  -- Ada.Containers.Formal_Hashed_Sets
580    ("a-cfhama", F)); -- Ada.Containers.Formal_Hashed_Maps
581
582   -----------------------
583   -- Alternative Units --
584   -----------------------
585
586   --  For some implementation units, there is a unit in the GNAT library
587   --  that has identical functionality that is usable. If we have such a
588   --  case we record the appropriate Unit name in Error_Msg_String.
589
590   type Aunit_Record is record
591      Fname : String (1 .. 6);
592      Aname : String_Ptr;
593   end record;
594
595   --  Array of alternative unit names
596
597   Scasuti : aliased String := "GNAT.Case_Util";
598   Scrc32  : aliased String := "GNAT.CRC32";
599   Shtable : aliased String := "GNAT.HTable";
600   Sos_lib : aliased String := "GNAT.OS_Lib";
601   Sregexp : aliased String := "GNAT.Regexp";
602   Sregpat : aliased String := "GNAT.Regpat";
603   Sstring : aliased String := "GNAT.Strings";
604   Sstusta : aliased String := "GNAT.Task_Stack_Usage";
605   Stasloc : aliased String := "GNAT.Task_Lock";
606   Sutf_32 : aliased String := "GNAT.UTF_32";
607
608   --  Array giving mapping
609
610   Map_Array : constant array (1 .. 10) of Aunit_Record := (
611                 ("casuti", Scasuti'Access),
612                 ("crc32 ", Scrc32 'Access),
613                 ("htable", Shtable'Access),
614                 ("os_lib", Sos_lib'Access),
615                 ("regexp", Sregexp'Access),
616                 ("regpat", Sregpat'Access),
617                 ("string", Sstring'Access),
618                 ("stusta", Sstusta'Access),
619                 ("tasloc", Stasloc'Access),
620                 ("utf_32", Sutf_32'Access));
621
622   ----------------------
623   -- Get_Kind_Of_Unit --
624   ----------------------
625
626   function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit is
627      Fname : constant File_Name_Type := Unit_File_Name (U);
628
629   begin
630      Error_Msg_Strlen := 0;
631      Get_Name_String (Fname);
632
633      --  Ada/System/Interfaces are all Ada 95 units
634
635      if (Name_Len =  7 and then Name_Buffer (1 ..  7) = "ada.ads")
636           or else
637         (Name_Len = 10 and then Name_Buffer (1 .. 10) = "system.ads")
638           or else
639         (Name_Len = 12 and then Name_Buffer (1 .. 12) = "interfac.ads")
640      then
641         return Ada_95_Unit;
642      end if;
643
644      --  If length of file name is greater than 12, not predefined. The value
645      --  12 here is an 8 char name with extension .ads.
646
647      if Name_Len > 12 then
648         return Not_Predefined_Unit;
649      end if;
650
651      --  Not predefined if file name does not start with a- g- s- i-
652
653      if Name_Len < 3
654        or else Name_Buffer (2) /= '-'
655        or else (Name_Buffer (1) /= 'a'
656                   and then
657                 Name_Buffer (1) /= 'g'
658                   and then
659                 Name_Buffer (1) /= 'i'
660                   and then
661                 Name_Buffer (1) /= 's')
662      then
663         return Not_Predefined_Unit;
664      end if;
665
666      --  To be considered predefined, the file name must end in .ads or .adb.
667      --  File names with other extensions (coming from the use of non-standard
668      --  file naming schemes) can never be predefined.
669
670      --  Note that in the context of a compiler, the .adb case will never
671      --  arise. However it can arise for other tools, e.g. gnatprove uses
672      --  this routine to detect when a construct comes from an instance of
673      --  a generic defined in a predefined unit.
674
675      if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads"
676           and then
677         Name_Buffer (Name_Len - 3 .. Name_Len) /= ".adb"
678      then
679         return Not_Predefined_Unit;
680      end if;
681
682      --  Otherwise normalize file name to 8 characters
683
684      Name_Len := Name_Len - 4;
685      while Name_Len < 8 loop
686         Name_Len := Name_Len + 1;
687         Name_Buffer (Name_Len) := ' ';
688      end loop;
689
690      --  See if name is in 95 list
691
692      for J in Non_Imp_File_Names_95'Range loop
693         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J).Fname then
694            return Ada_95_Unit;
695         end if;
696      end loop;
697
698      --  See if name is in 2005 list
699
700      for J in Non_Imp_File_Names_05'Range loop
701         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J).Fname then
702            return Ada_2005_Unit;
703         end if;
704      end loop;
705
706      --  See if name is in 2012 list
707
708      for J in Non_Imp_File_Names_12'Range loop
709         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_12 (J).Fname then
710            return Ada_2012_Unit;
711         end if;
712      end loop;
713
714      --  Only remaining special possibilities are children of System.RPC and
715      --  System.Garlic and special files of the form System.Aux...
716
717      Get_Name_String (Unit_Name (U));
718
719      if Name_Len > 12
720        and then Name_Buffer (1 .. 11) = "system.rpc."
721      then
722         return Ada_95_Unit;
723      end if;
724
725      if Name_Len > 15
726        and then Name_Buffer (1 .. 14) = "system.garlic."
727      then
728         return Ada_95_Unit;
729      end if;
730
731      if Name_Len > 11
732        and then Name_Buffer (1 .. 10) = "system.aux"
733      then
734         return Ada_95_Unit;
735      end if;
736
737      --  All tests failed, this is definitely an implementation unit. See if
738      --  we have an alternative name.
739
740      Get_Name_String (Fname);
741
742      if Name_Len in 11 .. 12
743        and then Name_Buffer (1 .. 2) = "s-"
744        and then Name_Buffer (Name_Len - 3 .. Name_Len) = ".ads"
745      then
746         for J in Map_Array'Range loop
747            if (Name_Len = 12 and then
748                 Name_Buffer (3 .. 8) = Map_Array (J).Fname)
749              or else
750               (Name_Len = 11 and then
751                 Name_Buffer (3 .. 7) = Map_Array (J).Fname (1 .. 5))
752            then
753               Error_Msg_Strlen := Map_Array (J).Aname'Length;
754               Error_Msg_String (1 .. Error_Msg_Strlen) :=
755                 Map_Array (J).Aname.all;
756            end if;
757         end loop;
758      end if;
759
760      return Implementation_Unit;
761   end Get_Kind_Of_Unit;
762
763   -------------------
764   -- Is_Known_Unit --
765   -------------------
766
767   function Is_Known_Unit (Nam : Node_Id) return Boolean is
768      Unam : Unit_Name_Type;
769      Fnam : File_Name_Type;
770
771   begin
772      --  If selector is not an identifier (e.g. it is a character literal or
773      --  some junk from a previous error), then definitely not a known unit.
774
775      if Nkind (Selector_Name (Nam)) /= N_Identifier then
776         return False;
777      end if;
778
779      --  Otherwise get corresponding file name
780
781      Unam := Get_Unit_Name (Nam);
782      Fnam := Get_File_Name (Unam, Subunit => False);
783      Get_Name_String (Fnam);
784
785      Error_Msg_Strlen := 0;
786
787      --  Ada/System/Interfaces are all Ada 95 units
788
789      if (Name_Len =  7 and then Name_Buffer (1 ..  7) = "ada.ads")
790           or else
791         (Name_Len = 10 and then Name_Buffer (1 .. 10) = "system.ads")
792           or else
793         (Name_Len = 12 and then Name_Buffer (1 .. 12) = "interfac.ads")
794      then
795         return True;
796      end if;
797
798      --  Remove extension from file name
799
800      if Name_Buffer (Name_Len - 3 .. Name_Len) = ".adb"
801           or else
802         Name_Buffer (Name_Len - 3 .. Name_Len) = ".ads"
803      then
804         Name_Len := Name_Len - 4;
805      else
806         return False;
807      end if;
808
809      --  Pad name to 8 characters
810
811      while Name_Len < 8 loop
812         Name_Len := Name_Len + 1;
813         Name_Buffer (Name_Len) := ' ';
814      end loop;
815
816      --  If length more than 8, definitely not a match
817
818      if Name_Len /= 8 then
819         return False;
820      end if;
821
822      --  If length is 8, search our tables
823
824      for J in Non_Imp_File_Names_95'Range loop
825         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J).Fname then
826            return True;
827         end if;
828      end loop;
829
830      for J in Non_Imp_File_Names_05'Range loop
831         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J).Fname then
832            return True;
833         end if;
834      end loop;
835
836      for J in Non_Imp_File_Names_12'Range loop
837         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_12 (J).Fname then
838            return True;
839         end if;
840      end loop;
841
842      --  If not found, not known
843
844      return False;
845
846   --  A safety guard, if we get an exception during this processing then it
847   --  is most likely the result of a previous error, or a peculiar case we
848   --  have not thought of. Since this routine is only used for error message
849   --  refinement, we will just return False.
850
851   exception
852      when others =>
853         return False;
854   end Is_Known_Unit;
855
856   ---------------------------
857   -- Not_Impl_Defined_Unit --
858   ---------------------------
859
860   function Not_Impl_Defined_Unit (U : Unit_Number_Type) return Boolean is
861      Fname : constant File_Name_Type := Unit_File_Name (U);
862
863   begin
864      Error_Msg_Strlen := 0;
865      Get_Name_String (Fname);
866
867      --  Ada/System/Interfaces are all RM-defined Ada 95 units
868
869      if (Name_Len =  7 and then Name_Buffer (1 ..  7) = "ada.ads")
870           or else
871         (Name_Len = 10 and then Name_Buffer (1 .. 10) = "system.ads")
872           or else
873         (Name_Len = 12 and then Name_Buffer (1 .. 12) = "interfac.ads")
874      then
875         return True;
876      end if;
877
878      --  If length of file name is greater than 12, then it's a user unit
879      --  and not a GNAT implementation defined unit.
880
881      if Name_Len > 12 then
882         return True;
883      end if;
884
885      --  Implementation defined if unit in the gnat hierarchy
886
887      if (Name_Len = 8 and then Name_Buffer (1 .. 8) = "gnat.ads")
888        or else (Name_Len > 2 and then Name_Buffer (1 .. 2) = "g-")
889      then
890         return False;
891      end if;
892
893      --  Not implementation defined if file name does not start with a- s- i-
894
895      if Name_Len < 3
896        or else Name_Buffer (2) /= '-'
897        or else (Name_Buffer (1) /= 'a'
898                   and then
899                 Name_Buffer (1) /= 'i'
900                   and then
901                 Name_Buffer (1) /= 's')
902      then
903         return True;
904      end if;
905
906      --  Not impl-defined if file name does not end in .ads. This can happen
907      --  when non-standard file names are being used.
908
909      if Name_Buffer (Name_Len - 3 .. Name_Len) /= ".ads" then
910         return True;
911      end if;
912
913      --  Otherwise normalize file name to 8 characters
914
915      Name_Len := Name_Len - 4;
916      while Name_Len < 8 loop
917         Name_Len := Name_Len + 1;
918         Name_Buffer (Name_Len) := ' ';
919      end loop;
920
921      --  Check our lists of names, if we find a match, return corresponding
922      --  indication of whether the file is RM defined, respecting the RM
923      --  version in which it is defined.
924
925      for J in Non_Imp_File_Names_95'Range loop
926         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_95 (J).Fname then
927            return Non_Imp_File_Names_95 (J).RMdef;
928         end if;
929      end loop;
930
931      for J in Non_Imp_File_Names_05'Range loop
932         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_05 (J).Fname then
933            return Non_Imp_File_Names_05 (J).RMdef
934              and then Ada_Version >= Ada_2005;
935         end if;
936      end loop;
937
938      for J in Non_Imp_File_Names_12'Range loop
939         if Name_Buffer (1 .. 8) = Non_Imp_File_Names_12 (J).Fname then
940            return Non_Imp_File_Names_95 (J).RMdef
941              and then Ada_Version >= Ada_2012;
942         end if;
943      end loop;
944
945      --  If unit is in System, Ada or Interfaces hierarchies and did not match
946      --  any entry in the list, means it is an internal implementation defined
947      --  unit which the restriction should definition forbid.
948
949      return True;
950   end Not_Impl_Defined_Unit;
951
952end Impunit;
953