1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2015, 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 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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This package deals with the implementation of the Restrictions pragma
28 with Aspects
; use Aspects
;
29 with Namet
; use Namet
;
30 with Rident
; use Rident
;
31 with Snames
; use Snames
;
33 with Types
; use Types
;
34 with Uintp
; use Uintp
;
38 Restrictions
: Restrictions_Info
:= No_Restrictions
;
39 -- This variable records restrictions found in any units in the main
40 -- extended unit, and in the case of restrictions checked for partition
41 -- consistency, restrictions found in any with'ed units, parent specs
42 -- etc., since we may as well check as much as we can at compile time.
43 -- These variables should not be referenced directly by clients. Instead
44 -- use Check_Restriction to record a violation of a restriction, and
45 -- Restriction_Active to test if a given restriction is active.
47 Restrictions_Loc
: array (All_Restrictions
) of Source_Ptr
:=
48 (others => No_Location
);
49 -- Locations of Restrictions pragmas for error message purposes.
50 -- Valid only if corresponding entry in Restrictions is set. A value
51 -- of No_Location is used for implicit restrictions set by another
52 -- pragma, and a value of System_Location is used for restrictions
53 -- set from package Standard by the processing in Targparm.
55 Restriction_Profile_Name
: array (All_Restrictions
) of Profile_Name
;
56 -- Entries in this array are valid only if the corresponding restriction in
57 -- Restrictions is set. The value is the corresponding profile name if the
58 -- restriction was set by a Profile or Profile_Warnings pragma. The value
59 -- is No_Profile in all other cases.
61 Main_Restrictions
: Restrictions_Info
:= No_Restrictions
;
62 -- This variable records only restrictions found in any units of the
63 -- main extended unit. These are the variables used for ali file output,
64 -- since we want the binder to be able to accurately diagnose inter-unit
65 -- restriction violations.
67 Restriction_Warnings
: Rident
.Restriction_Flags
:= (others => False);
68 -- If one of these flags is set, then it means that violation of the
69 -- corresponding restriction results only in a warning message, not
70 -- in an error message, and the restriction is not otherwise enforced.
71 -- Note that the flags in Restrictions are set to indicate that the
72 -- restriction is set in this case, but Main_Restrictions is never
73 -- set if Restriction_Warnings is set, so this does not look like a
74 -- restriction to the binder.
76 -- The following declarations establish a mapping between restriction
77 -- identifiers, and the names of corresponding restricted library units.
79 type Unit_Entry
is record
80 Res_Id
: Restriction_Id
;
81 Filenm
: String (1 .. 8);
84 Unit_Array
: constant array (Positive range <>) of Unit_Entry
:= (
85 (No_Asynchronous_Control
, "a-astaco"),
86 (No_Calendar
, "a-calend"),
87 (No_Calendar
, "calendar"),
88 (No_Delay
, "a-calend"),
89 (No_Delay
, "calendar"),
90 (No_Dynamic_Priorities
, "a-dynpri"),
91 (No_Finalization
, "a-finali"),
100 (No_Task_Attributes_Package
, "a-tasatt"),
101 (No_Unchecked_Conversion
, "a-unccon"),
102 (No_Unchecked_Conversion
, "unchconv"),
103 (No_Unchecked_Deallocation
, "a-uncdea"),
104 (No_Unchecked_Deallocation
, "unchdeal"));
106 -- The following map has True for all GNAT-defined Restrictions. It is used
107 -- to implement pragma Restrictions (No_Implementation_Restrictions) (which
108 -- is why this restriction itself is excluded from the list).
110 Implementation_Restriction
: constant array (All_Restrictions
) of Boolean :=
111 (Simple_Barriers
=> True,
113 No_Default_Initialization
=> True,
114 No_Direct_Boolean_Operators
=> True,
115 No_Dispatching_Calls
=> True,
116 No_Dynamic_Attachment
=> True,
117 No_Elaboration_Code
=> True,
118 No_Enumeration_Maps
=> True,
119 No_Entry_Calls_In_Elaboration_Code
=> True,
120 No_Entry_Queue
=> True,
121 No_Exception_Handlers
=> True,
122 No_Exception_Propagation
=> True,
123 No_Exception_Registration
=> True,
124 No_Finalization
=> True,
126 No_Implementation_Attributes
=> True,
127 No_Implementation_Pragmas
=> True,
128 No_Implicit_Conditionals
=> True,
129 No_Implicit_Aliasing
=> True,
130 No_Implicit_Dynamic_Code
=> True,
131 No_Implicit_Loops
=> True,
132 No_Initialize_Scalars
=> True,
133 No_Local_Protected_Objects
=> True,
134 No_Long_Long_Integers
=> True,
135 No_Multiple_Elaboration
=> True,
136 No_Protected_Type_Allocators
=> True,
137 No_Relative_Delay
=> True,
138 No_Requeue_Statements
=> True,
139 No_Secondary_Stack
=> True,
140 No_Select_Statements
=> True,
141 No_Standard_Storage_Pools
=> True,
142 No_Stream_Optimizations
=> True,
144 No_Task_Attributes_Package
=> True,
145 No_Task_Termination
=> True,
147 No_Wide_Characters
=> True,
148 Static_Priorities
=> True,
149 Static_Storage_Size
=> True,
150 Pure_Barriers
=> True,
154 --------------------------
155 -- No_Dependences Table --
156 --------------------------
158 -- The following table records entries made by Restrictions pragmas
159 -- that specify a parameter for No_Dependence. Each such pragma makes
160 -- an entry in this table.
162 -- Note: we have chosen to implement this restriction in the "syntactic"
163 -- form, where we do not check that the named package is a language defined
164 -- package, but instead we allow arbitrary package names. The discussion of
165 -- this issue is not complete in the ARG, but the sense seems to be leaning
166 -- in this direction, which makes more sense to us, since it is much more
167 -- useful, and much easier to implement.
169 type ND_Entry
is record
171 -- The unit parameter from the No_Dependence pragma
174 -- True if from Restriction_Warnings, False if from Restrictions
176 Profile
: Profile_Name
;
177 -- Set to name of profile from which No_Dependence entry came, or to
178 -- No_Profile if a pragma Restriction set the No_Dependence entry.
181 package No_Dependences
is new Table
.Table
(
182 Table_Component_Type
=> ND_Entry
,
183 Table_Index_Type
=> Int
,
184 Table_Low_Bound
=> 0,
185 Table_Initial
=> 200,
186 Table_Increment
=> 200,
187 Table_Name
=> "Name_No_Dependences");
189 ----------------------------
190 -- No_Use_Of_Entity Table --
191 ----------------------------
193 -- The following table records entries made by Restrictions pragmas
194 -- that specify a parameter for No_Use_Of_Entity. Each such pragma makes
195 -- an entry in this table.
197 -- Note: we have chosen to implement this restriction in the "syntactic"
198 -- form, where we allow arbitrary fully qualified names to be specified.
200 type NE_Entry
is record
202 -- The entity parameter from the No_Use_Of_Entity pragma. This is in
203 -- the form of a selected component, since that is the way the parser
204 -- processes it, and we don't further analyze it.
207 -- True if from Restriction_Warnings, False if from Restrictions
209 Profile
: Profile_Name
;
210 -- Set to name of profile from which No_Use_Of_Entity entry came, or to
211 -- No_Profile if a pragma Restriction set the No_Use_Of_Entity entry.
214 package No_Use_Of_Entity
is new Table
.Table
(
215 Table_Component_Type
=> NE_Entry
,
216 Table_Index_Type
=> Int
,
217 Table_Low_Bound
=> 0,
218 Table_Initial
=> 200,
219 Table_Increment
=> 200,
220 Table_Name
=> "Name_No_Use_Of_Entity");
222 -- Note that in addition to making an entry in this table, we also set the
223 -- Boolean2 flag of the Name_Table entry for the simple name of the entity.
224 -- This is used to avoid most useless searches of this table.
230 -- Note: several of these subprograms can generate error messages (e.g.
231 -- Check_Restriction). These routines should be called in the analyzer
232 -- rather than the expander, so that the associated error messages are
233 -- correctly generated in semantics only (-gnatc) mode.
235 function Abort_Allowed
return Boolean;
236 pragma Inline
(Abort_Allowed
);
237 -- Tests to see if abort is allowed by the current restrictions settings.
238 -- For abort to be allowed, either No_Abort_Statements must be False,
239 -- or Max_Asynchronous_Select_Nesting must be non-zero.
241 procedure Check_Compiler_Unit
(Feature
: String; N
: Node_Id
);
242 -- If unit N is in a unit that has a pragma Compiler_Unit_Warning, then
243 -- a message is posted on node N noting use of the given feature is not
244 -- permitted in the compiler (bootstrap considerations).
246 procedure Check_Compiler_Unit
(Feature
: String; Loc
: Source_Ptr
);
247 -- If unit N is in a unit that has a pragma Compiler_Unit_Warning, then a
248 -- message is posted at location Loc noting use of the given feature is not
249 -- permitted in the compiler (bootstrap considerations).
251 procedure Check_Restricted_Unit
(U
: Unit_Name_Type
; N
: Node_Id
);
252 -- Checks if loading of unit U is prohibited by the setting of some
253 -- restriction (e.g. No_IO restricts the loading of unit Ada.Text_IO).
254 -- If a restriction exists post error message at the given node.
256 procedure Check_Restriction
257 (Msg_Issued
: out Boolean;
260 V
: Uint
:= Uint_Minus_1
);
261 -- Checks that the given restriction is not set, and if it is set, an
262 -- appropriate message is posted on the given node, in which case
263 -- Msg_Issued is set to True (and False otherwise). Also records the
264 -- violation in the appropriate internal arrays. Note that it is mandatory
265 -- to always use this routine to check if a restriction is violated. Such
266 -- checks must never be done directly by the caller, since otherwise
267 -- violations in the absence of restrictions are not properly recorded. The
268 -- value of V is relevant only for parameter restrictions, and in this case
269 -- indicates the exact count for the violation. If the exact count is not
270 -- known, V is left at its default of -1 which indicates an unknown count.
272 procedure Check_Restriction
275 V
: Uint
:= Uint_Minus_1
);
276 -- Wrapper on Check_Restriction with Msg_Issued, with the out-parameter
277 -- being ignored here.
279 procedure Check_Restriction_No_Dependence
(U
: Node_Id
; Err
: Node_Id
);
280 -- Called when a dependence on a unit is created (either implicitly, or by
281 -- an explicit WITH clause). U is a node for the unit involved, and Err is
282 -- the node to which an error will be attached if necessary.
284 procedure Check_Restriction_No_Specification_Of_Aspect
(N
: Node_Id
);
285 -- N is the node id for an N_Aspect_Specification. An error message
286 -- (warning) will be issued if a restriction (warning) was previously set
287 -- for this aspect using Set_No_Specification_Of_Aspect.
289 procedure Check_Restriction_No_Use_Of_Attribute
(N
: Node_Id
);
290 -- N is the node of an attribute definition clause. An error message
291 -- (warning) will be issued if a restriction (warning) was previously set
292 -- for this attribute using Set_No_Use_Of_Attribute.
294 procedure Check_Restriction_No_Use_Of_Entity
(N
: Node_Id
);
295 -- N is the node id for an entity reference. An error message (warning)
296 -- will be issued if a restriction (warning) was previously set for this
297 -- entity name using Set_No_Use_Of_Entity.
299 procedure Check_Restriction_No_Use_Of_Pragma
(N
: Node_Id
);
300 -- N is the node of a pragma. An error message (warning) will be issued
301 -- if a restriction (warning) was previously set for this pragma using
302 -- Set_No_Use_Of_Pragma.
304 procedure Check_Elaboration_Code_Allowed
(N
: Node_Id
);
305 -- Tests to see if elaboration code is allowed by the current restrictions
306 -- settings. This function is called by Gigi when it needs to define an
307 -- elaboration routine. If elaboration code is not allowed, an error
308 -- message is posted on the node given as argument.
310 procedure Check_SPARK_05_Restriction
313 Force
: Boolean := False);
314 -- Node N represents a construct not allowed in SPARK_05 mode. If this is
315 -- a source node, or if the restriction is forced (Force = True), and
316 -- the SPARK_05 restriction is set, then an error is issued on N. Msg
317 -- is appended to the restriction failure message.
319 procedure Check_SPARK_05_Restriction
(Msg1
, Msg2
: String; N
: Node_Id
);
320 -- Same as Check_SPARK_05_Restriction except there is a continuation
321 -- message Msg2 following the initial message Msg1.
323 procedure Check_No_Implicit_Aliasing
(Obj
: Node_Id
);
324 -- Obj is a node for which Is_Aliased_View is True, which is being used in
325 -- a context (e.g. 'Access) where no implicit aliasing is allowed if the
326 -- restriction No_Implicit_Aliasing is set. This procedure checks for the
327 -- case where the restriction is active and Obj does not meet the required
328 -- rules for avoiding implicit aliases, and issues a restriction message.
330 procedure Check_Implicit_Dynamic_Code_Allowed
(N
: Node_Id
);
331 -- Tests to see if dynamic code generation (dynamically generated
332 -- trampolines, in particular) is allowed by the current restrictions
333 -- settings. This function is called by Gigi when it needs to generate code
334 -- that generates a trampoline. If not allowed, an error message is posted
335 -- on the node given as argument.
337 procedure Check_No_Implicit_Heap_Alloc
(N
: Node_Id
);
338 -- Equivalent to Check_Restriction (No_Implicit_Heap_Allocations, N).
339 -- Provided for easy use by back end, which has to check this restriction.
341 procedure Check_No_Implicit_Task_Alloc
(N
: Node_Id
);
342 -- Equivalent to Check_Restriction (No_Implicit_Task_Allocations, N).
343 -- Provided for easy use by back end, which has to check this restriction.
345 procedure Check_No_Implicit_Protected_Alloc
(N
: Node_Id
);
347 -- Check_Restriction (No_Implicit_Protected_Object_Allocations, N)
348 -- Provided for easy use by back end, which has to check this restriction.
350 procedure Check_Obsolescent_2005_Entity
(E
: Entity_Id
; N
: Node_Id
);
351 -- This routine checks if the entity E is one of the obsolescent entries
352 -- in Ada.Characters.Handling in Ada 2005 and No_Obsolescent_Features
353 -- restriction is active. If so an appropriate message is given. N is
354 -- the node on which the message is to be placed. It's a bit kludgy to
355 -- have this highly specialized routine rather than some wonderful general
356 -- mechanism (e.g. a special pragma) to handle this case, but there are
357 -- only six cases, and it is not worth the effort to do something general.
359 procedure Check_Wide_Character_Restriction
(E
: Entity_Id
; N
: Node_Id
);
360 -- This procedure checks if the No_Wide_Character restriction is active,
361 -- and if so, if N Comes_From_Source, and the root type of E is one of
362 -- [Wide_]Wide_Character or [Wide_]Wide_String, then the restriction
363 -- violation is recorded, and an appropriate message given.
365 function Get_Restriction_Id
366 (N
: Name_Id
) return Restriction_Id
;
367 -- Given an identifier name, determines if it is a valid restriction
368 -- identifier, and if so returns the corresponding Restriction_Id value,
369 -- otherwise returns Not_A_Restriction_Id.
371 function OK_No_Dependence_Unit_Name
(N
: Node_Id
) return Boolean;
372 -- Used in checking No_Dependence argument of pragma Restrictions or
373 -- pragma Restrictions_Warning, or attribute Restriction_Set. Returns
374 -- True if N has the proper form for a unit name, False otherwise.
376 function OK_No_Use_Of_Entity_Name
(N
: Node_Id
) return Boolean;
377 -- Used in checking No_Use_Of_Entity argument of pragma Restrictions or
378 -- pragma Restrictions_Warning, or attribute Restriction_Set. Returns
379 -- True if N has the proper form for an entity name, False otherwise.
381 function Is_In_Hidden_Part_In_SPARK
(Loc
: Source_Ptr
) return Boolean;
382 -- Determine if given location is covered by a hidden region range in the
383 -- SPARK hides table.
385 function No_Exception_Handlers_Set
return Boolean;
386 -- Test to see if current restrictions settings specify that no exception
387 -- handlers are present. This function is called by Gigi when it needs to
388 -- expand an AT END clean up identifier with no exception handler. True
389 -- will be returned if the configurable run-time is activated, and either
390 -- of the restrictions No_Exception_Handlers or No_Exception_Propagation is
391 -- set. In the latter case, the source may contain handlers but they either
392 -- get converted using the local goto transformation or deleted.
394 function No_Exception_Propagation_Active
return Boolean;
395 -- Test to see if current restrictions settings specify that no
396 -- exception propagation is activated.
398 function Process_Restriction_Synonyms
(N
: Node_Id
) return Name_Id
;
399 -- Id is a node whose Chars field contains the name of a restriction.
400 -- If it is one of synonyms that we allow for historical purposes (for
401 -- list see System.Rident), then the proper official name is returned.
403 function Restriction_Active
(R
: All_Restrictions
) return Boolean;
404 pragma Inline
(Restriction_Active
);
405 -- Determines if a given restriction is active. This call should only be
406 -- used where the compiled code depends on whether the restriction is
407 -- active. Always use Check_Restriction to record a violation. Note that
408 -- this returns False if we only have a Restriction_Warnings set, since
409 -- restriction warnings should never affect generated code. If you want
410 -- to know if a call to Check_Restriction is needed then use the function
411 -- Restriction_Check_Required instead.
413 function Restriction_Check_Required
(R
: All_Restrictions
) return Boolean;
414 pragma Inline
(Restriction_Check_Required
);
415 -- Determines if either a Restriction_Warnings or Restrictions pragma has
416 -- been given for the specified restriction. If true, then a subsequent
417 -- call to Check_Restriction is required if the restriction is violated.
418 -- This must not be used to guard code generation that depends on whether
419 -- a restriction is active (see Restriction_Active above). Typically it
420 -- is used to avoid complex code to determine if a restriction is violated,
421 -- executing this code only if needed.
423 function Restricted_Profile
return Boolean;
424 -- Tests if set of restrictions corresponding to Profile (Restricted) is
425 -- currently in effect (set by pragma Profile, or by an appropriate set of
426 -- individual Restrictions pragmas). Returns True only if all the required
427 -- restrictions are set.
429 procedure Set_Hidden_Part_In_SPARK
(Loc1
, Loc2
: Source_Ptr
);
430 -- Insert a new hidden region range in the SPARK hides table. The effect
431 -- is to hide any SPARK violation messages which are in the range Loc1 to
432 -- Loc2-1 (i.e. Loc2 is the first location for reenabling checks).
434 procedure Set_Profile_Restrictions
438 -- Sets the set of restrictions associated with the given profile name. N
439 -- is the node of the construct to which error messages are to be attached
440 -- as required. Warn is set True for the case of Profile_Warnings where the
441 -- restrictions are set as warnings rather than legality requirements, and
442 -- is also True for Profile if the Treat_Restrictions_As_Warnings flag is
443 -- set. It is false for Profile if this flag is not set.
445 procedure Set_Restriction
446 (R
: All_Boolean_Restrictions
;
448 -- N is a node (typically a pragma node) that has the effect of setting
449 -- Boolean restriction R. The restriction is set in Restrictions, and
450 -- also in Main_Restrictions if this is the main unit.
452 procedure Set_Restriction
453 (R
: All_Parameter_Restrictions
;
456 -- Similar to the above, except that this is used for the case of a
457 -- parameter restriction, and the corresponding value V is given.
459 procedure Set_Restriction_No_Dependence
462 Profile
: Profile_Name
:= No_Profile
);
463 -- Sets given No_Dependence restriction in table if not there already. Warn
464 -- is True if from Restriction_Warnings, or for Restrictions if the flag
465 -- Treat_Restrictions_As_Warnings is set. False if from Restrictions and
466 -- this flag is not set. Profile is set to a non-default value if the
467 -- No_Dependence restriction comes from a Profile pragma.
469 procedure Set_Restriction_No_Specification_Of_Aspect
472 -- N is the node id for an identifier from a pragma Restrictions for the
473 -- No_Specification_Of_Aspect pragma. An error message will be issued if
474 -- the identifier is not a valid aspect name. Warning is set True for the
475 -- case of a Restriction_Warnings pragma specifying this restriction and
476 -- False for a Restrictions pragma specifying this restriction.
478 procedure Set_Restriction_No_Specification_Of_Aspect
(A_Id
: Aspect_Id
);
479 -- Version used by Get_Target_Parameters (via Tbuild)
481 procedure Set_Restriction_No_Use_Of_Attribute
484 -- N is the node id for the identifier in a pragma Restrictions for
485 -- No_Use_Of_Attribute. Caller has verified that this is a valid attribute
488 procedure Set_Restriction_No_Use_Of_Attribute
(A_Id
: Attribute_Id
);
489 -- Version used by Get_Target_Parameters (via Tbuild)
491 procedure Set_Restriction_No_Use_Of_Entity
494 Profile
: Profile_Name
:= No_Profile
);
495 -- Sets given No_Use_Of_Entity restriction in table if not there already.
496 -- Warn is True if from Restriction_Warnings, or for Restrictions if the
497 -- flag Treat_Restrictions_As_Warnings is set. False if from Restrictions
498 -- and this flag is not set. Profile is set to a non-default value if the
499 -- No_Dependence restriction comes from a Profile pragma. This procedure
500 -- also takes care of setting the Boolean2 flag of the simple name for
501 -- the entity (to optimize table searches).
503 procedure Set_Restriction_No_Use_Of_Pragma
506 -- N is the node id for the identifier in a pragma Restrictions for
507 -- No_Use_Of_Pragma. Caller has verified that this is a valid pragma id.
509 procedure Set_Restriction_No_Use_Of_Pragma
(A_Id
: Pragma_Id
);
510 -- Version used in call from Get_Target_Parameters (via Tbuild).
512 function Tasking_Allowed
return Boolean;
513 pragma Inline
(Tasking_Allowed
);
514 -- Tests if tasking operations are allowed by the current restrictions
515 -- settings. For tasking to be allowed Max_Tasks must be non-zero.
517 ----------------------------------------------
518 -- Handling of Boolean Compilation Switches --
519 ----------------------------------------------
521 -- The following declarations are used for proper saving and restoring of
522 -- restrictions for separate compilation units. There are two cases:
524 -- For partition-wide restrictions, we just let the restrictions pragmas
525 -- pile up, and we never reset them. We might as well detect what we can
526 -- at compile time. If e.g. a with'ed unit has a restriction for one of
527 -- the partition-wide restrictions, then the binder will enforce it on
528 -- all units in the partition, including the unit with the WITH. Although
529 -- it would not be wrong to leave this till bind time, we might as well
530 -- flag it earlier at compile time.
532 -- For non-partition-wide restrictions, we have quite a different state
533 -- of affairs. Here it would be quite wrong to carry a restriction from
534 -- a with'ed unit to another with'ed unit, or from a package spec to the
535 -- package body. This means that we have to reset these non-partition
536 -- wide restrictions at the start of each separate compilation unit. For
537 -- units in the extended main program, we need to reset them all to the
538 -- values set by the configuration pragma file(s). For units not in the
539 -- extended main program, e.g. with'ed units, we might as well reset all
540 -- of these restrictions to off (False). The actual initial values will
541 -- be taken from the config files active when those units are compiled
544 type Save_Cunit_Boolean_Restrictions
is private;
545 -- Type used for saving and restoring compilation unit restrictions.
547 function Cunit_Boolean_Restrictions_Save
548 return Save_Cunit_Boolean_Restrictions
;
549 -- This function saves the compilation unit restriction settings, leaving
550 -- them unchanged. This is used e.g. at the start of processing a context
551 -- clause, so that the main unit restrictions can be restored after all
552 -- the with'ed units have been processed.
554 procedure Cunit_Boolean_Restrictions_Restore
555 (R
: Save_Cunit_Boolean_Restrictions
);
556 -- This is the corresponding restore procedure to restore restrictions
557 -- previously saved by Cunit_Boolean_Restrictions_Save. However it does
558 -- not reset No_Elaboration_Code, this stays set if it was set before
559 -- the call, and also if it is set before the call, then the Config
560 -- setting is also updated to include this restriction. This is what
561 -- implements the special handling of No_Elaboration_Code.
563 procedure Save_Config_Cunit_Boolean_Restrictions
;
564 -- This saves the current compilation unit restrictions in an internal
565 -- variable, and leaves them unchanged. This is called immediately after
566 -- processing the configuration file pragmas, to record the restrictions
567 -- set by these configuration file pragmas.
569 procedure Restore_Config_Cunit_Boolean_Restrictions
;
570 -- This restores the value saved by the previous call to save config values
571 -- saved by Save_Config_Cunit_Boolean_Restrictions. It is called at the
572 -- start of processing a new unit that is part of the main sources (e.g.
573 -- a package spec when the main unit is a package body).
575 procedure Reset_Cunit_Boolean_Restrictions
;
576 -- Turns off all non-partition-wide boolean restrictions
578 procedure Add_To_Config_Boolean_Restrictions
(R
: Restriction_Id
);
579 -- Add specified restriction to stored configuration boolean restrictions.
580 -- This is used for handling the special case of No_Elaboration_Code.
583 type Save_Cunit_Boolean_Restrictions
is
584 array (Cunit_Boolean_Restrictions
) of Boolean;
585 -- Type used for saving and restoring compilation unit restrictions.
586 -- See Compilation_Unit_Restrictions_[Save|Restore] subprograms.