1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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 with Atree
; use Atree
;
27 with Einfo
; use Einfo
;
28 with Elists
; use Elists
;
29 with Exp_Util
; use Exp_Util
;
30 with Nlists
; use Nlists
;
32 with Restrict
; use Restrict
;
33 with Rident
; use Rident
;
34 with Sem_Aux
; use Sem_Aux
;
35 with Sem_Util
; use Sem_Util
;
36 with Sinfo
; use Sinfo
;
38 package body Exp_Tss
is
44 function Base_Init_Proc
46 Ref
: Entity_Id
:= Empty
) return Entity_Id
52 pragma Assert
(Is_Type
(Typ
));
54 if Is_Private_Type
(Typ
) then
55 Full_Type
:= Underlying_Type
(Base_Type
(Typ
));
60 if No
(Full_Type
) then
63 elsif Is_Concurrent_Type
(Full_Type
)
64 and then Present
(Corresponding_Record_Type
(Base_Type
(Full_Type
)))
66 -- The initialization routine to be called is that of the base type
67 -- of the corresponding record type, which may itself be a subtype
68 -- and possibly an itype.
71 (Base_Type
(Corresponding_Record_Type
(Base_Type
(Full_Type
))),
75 Proc
:= Init_Proc
(Base_Type
(Full_Type
), Ref
);
78 and then Is_Composite_Type
(Full_Type
)
79 and then Is_Derived_Type
(Full_Type
)
81 return Init_Proc
(Root_Type
(Full_Type
), Ref
);
92 -- Note: internally this routine is also used to initially set up
93 -- a TSS entry for a new type (case of being called from Set_TSS)
95 procedure Copy_TSS
(TSS
: Entity_Id
; Typ
: Entity_Id
) is
99 Ensure_Freeze_Node
(Typ
);
100 FN
:= Freeze_Node
(Typ
);
102 if No
(TSS_Elist
(FN
)) then
103 Set_TSS_Elist
(FN
, New_Elmt_List
);
106 -- We prepend here, so that a second call overrides the first, it
107 -- is not clear that this is required, but it seems reasonable.
109 Prepend_Elmt
(TSS
, TSS_Elist
(FN
));
112 ------------------------
113 -- Find_Inherited_TSS --
114 ------------------------
116 function Find_Inherited_TSS
118 Nam
: TSS_Name_Type
) return Entity_Id
120 Btyp
: Entity_Id
:= Typ
;
125 Btyp
:= Base_Type
(Btyp
);
126 Proc
:= TSS
(Btyp
, Nam
);
128 exit when Present
(Proc
)
129 or else not Is_Derived_Type
(Btyp
);
131 -- If Typ is a derived type, it may inherit attributes from some
134 Btyp
:= Etype
(Btyp
);
139 -- If nothing else, use the TSS of the root type
141 Proc
:= TSS
(Base_Type
(Underlying_Type
(Typ
)), Nam
);
145 end Find_Inherited_TSS
;
147 -----------------------
148 -- Get_TSS_Name_Type --
149 -----------------------
151 function Get_TSS_Name
(E
: Entity_Id
) return TSS_Name_Type
is
157 Get_Last_Two_Chars
(Chars
(E
), C1
, C2
);
159 if C1
in 'A' .. 'Z' and then C2
in 'A' .. 'Z' then
162 for J
in TSS_Names
'Range loop
163 if Nm
= TSS_Names
(J
) then
172 ---------------------------------
173 -- Has_Non_Null_Base_Init_Proc --
174 ---------------------------------
176 -- Note: if a base Init_Proc is present, and No_Default_Initialization is
177 -- present, then we must avoid testing for a null init proc, since there
178 -- is no init proc present in this case.
180 function Has_Non_Null_Base_Init_Proc
(Typ
: Entity_Id
) return Boolean is
181 BIP
: constant Entity_Id
:= Base_Init_Proc
(Typ
);
184 and then (Restriction_Active
(No_Default_Initialization
)
185 or else not Is_Null_Init_Proc
(BIP
));
186 end Has_Non_Null_Base_Init_Proc
;
194 Ref
: Entity_Id
:= Empty
) return Entity_Id
196 FN
: constant Node_Id
:= Freeze_Node
(Typ
);
205 elsif No
(TSS_Elist
(FN
)) then
209 Elmt
:= First_Elmt
(TSS_Elist
(FN
));
210 while Present
(Elmt
) loop
211 if Is_Init_Proc
(Node
(Elmt
)) then
212 if not Is_CPP_Class
(Typ
) then
215 -- For CPP classes, we are looking for the default constructor,
216 -- and so we must skip any non-default constructor.
221 (Parameter_Specifications
(Parent
(Node
(Elmt
))))))
230 -- Non-default constructors are currently supported only in the context
231 -- of interfacing with C++.
233 else pragma Assert
(Is_CPP_Class
(Typ
));
235 -- Use the referenced function to locate the init_proc matching
236 -- the C++ constructor.
238 Elmt
:= First_Elmt
(TSS_Elist
(FN
));
239 while Present
(Elmt
) loop
240 if Is_Init_Proc
(Node
(Elmt
)) then
241 E1
:= Next_Formal
(First_Formal
(Node
(Elmt
)));
242 E2
:= First_Formal
(Ref
);
243 while Present
(E1
) and then Present
(E2
) loop
244 if Chars
(E1
) /= Chars
(E2
)
245 or else Ekind
(E1
) /= Ekind
(E2
)
249 elsif Ekind
(Etype
(E1
)) /= E_Anonymous_Access_Type
250 and then Ekind
(Etype
(E2
)) /= E_Anonymous_Access_Type
251 and then Etype
(E1
) /= Etype
(E2
)
255 elsif Ekind
(Etype
(E1
)) = E_Anonymous_Access_Type
256 and then Ekind
(Etype
(E2
)) = E_Anonymous_Access_Type
257 and then Directly_Designated_Type
(Etype
(E1
))
258 /= Directly_Designated_Type
(Etype
(E2
))
263 E1
:= Next_Formal
(E1
);
264 E2
:= Next_Formal
(E2
);
267 if No
(E1
) and then No
(E2
) then
283 function Is_Init_Proc
(E
: Entity_Id
) return Boolean is
287 Get_Last_Two_Chars
(Chars
(E
), C1
, C2
);
288 return C1
= TSS_Init_Proc
(1) and then C2
= TSS_Init_Proc
(2);
295 function Is_TSS
(E
: Entity_Id
; Nam
: TSS_Name_Type
) return Boolean is
299 Get_Last_Two_Chars
(Chars
(E
), C1
, C2
);
300 return C1
= Nam
(1) and then C2
= Nam
(2);
303 function Is_TSS
(N
: Name_Id
; Nam
: TSS_Name_Type
) return Boolean is
307 Get_Last_Two_Chars
(N
, C1
, C2
);
308 return C1
= Nam
(1) and then C2
= Nam
(2);
311 -------------------------
312 -- Make_Init_Proc_Name --
313 -------------------------
315 function Make_Init_Proc_Name
(Typ
: Entity_Id
) return Name_Id
is
317 return Make_TSS_Name
(Typ
, TSS_Init_Proc
);
318 end Make_Init_Proc_Name
;
324 function Make_TSS_Name
326 Nam
: TSS_Name_Type
) return Name_Id
329 Get_Name_String
(Chars
(Typ
));
330 Add_Char_To_Name_Buffer
(Nam
(1));
331 Add_Char_To_Name_Buffer
(Nam
(2));
335 -------------------------
336 -- Make_TSS_Name_Local --
337 -------------------------
339 function Make_TSS_Name_Local
341 Nam
: TSS_Name_Type
) return Name_Id
344 Get_Name_String
(Chars
(Typ
));
345 Add_Char_To_Name_Buffer
('_');
346 Add_Nat_To_Name_Buffer
(Increment_Serial_Number
);
347 Add_Char_To_Name_Buffer
(Nam
(1));
348 Add_Char_To_Name_Buffer
(Nam
(2));
350 end Make_TSS_Name_Local
;
356 function Same_TSS
(E1
, E2
: Entity_Id
) return Boolean is
363 Get_Last_Two_Chars
(Chars
(E1
), E1C1
, E1C2
);
364 Get_Last_Two_Chars
(Chars
(E2
), E2C1
, E2C2
);
380 procedure Set_Init_Proc
(Typ
: Entity_Id
; Init
: Entity_Id
) is
389 procedure Set_TSS
(Typ
: Entity_Id
; TSS
: Entity_Id
) is
391 -- Make sure body of subprogram is frozen
393 -- Skip this for Init_Proc with No_Default_Initialization, since the
394 -- Init proc is a dummy void entity in this case to be ignored.
396 if Is_Init_Proc
(TSS
)
397 and then Restriction_Active
(No_Default_Initialization
)
401 -- Skip this if not in the same code unit (since it means we are using
402 -- an already existing TSS in another unit)
404 elsif not In_Same_Code_Unit
(Typ
, TSS
) then
407 -- Otherwise make sure body is frozen
410 Append_Freeze_Action
(Typ
, Unit_Declaration_Node
(TSS
));
422 function TSS
(Typ
: Entity_Id
; Nam
: TSS_Name_Type
) return Entity_Id
is
423 FN
: constant Node_Id
:= Freeze_Node
(Typ
);
431 elsif No
(TSS_Elist
(FN
)) then
435 Elmt
:= First_Elmt
(TSS_Elist
(FN
));
436 while Present
(Elmt
) loop
437 if Is_TSS
(Node
(Elmt
), Nam
) then
440 -- For stream subprograms, the TSS entity may be a renaming-
441 -- as-body of an already generated entity. Use that one rather
442 -- the one introduced by the renaming, which is an artifact of
443 -- current stream handling.
445 if Nkind
(Parent
(Parent
(Subp
))) =
446 N_Subprogram_Renaming_Declaration
448 Present
(Corresponding_Spec
(Parent
(Parent
(Subp
))))
450 return Corresponding_Spec
(Parent
(Parent
(Subp
)));
464 function TSS
(Typ
: Entity_Id
; Nam
: Name_Id
) return Entity_Id
is
465 FN
: constant Node_Id
:= Freeze_Node
(Typ
);
473 elsif No
(TSS_Elist
(FN
)) then
477 Elmt
:= First_Elmt
(TSS_Elist
(FN
));
478 while Present
(Elmt
) loop
479 if Chars
(Node
(Elmt
)) = Nam
then
482 -- For stream subprograms, the TSS entity may be a renaming-
483 -- as-body of an already generated entity. Use that one rather
484 -- the one introduced by the renaming, which is an artifact of
485 -- current stream handling.
487 if Nkind
(Parent
(Parent
(Subp
))) =
488 N_Subprogram_Renaming_Declaration
490 Present
(Corresponding_Spec
(Parent
(Parent
(Subp
))))
492 return Corresponding_Spec
(Parent
(Parent
(Subp
)));