| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S E M _ P R A G -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2012, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING3. If not, go to -- |
| -- http://www.gnu.org/licenses for a complete copy of the license. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Pragma handling is isolated in a separate package |
| -- (logically this processing belongs in chapter 4) |
| |
| with Namet; use Namet; |
| with Types; use Types; |
| |
| package Sem_Prag is |
| |
| ----------------- |
| -- Subprograms -- |
| ----------------- |
| |
| procedure Analyze_Pragma (N : Node_Id); |
| -- Analyze procedure for pragma reference node N |
| |
| procedure Analyze_CTC_In_Decl_Part (N : Node_Id; S : Entity_Id); |
| -- Special analyze routine for contract-case and test-case pragmas that |
| -- appears within a declarative part where the pragma is associated with |
| -- a subprogram specification. N is the pragma node, and S is the entity |
| -- for the related subprogram. This procedure does a preanalysis of the |
| -- expressions in the pragma as "spec expressions" (see section in Sem |
| -- "Handling of Default and Per-Object Expressions..."). |
| |
| procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id); |
| -- Special analyze routine for precondition/postcondition pragma that |
| -- appears within a declarative part where the pragma is associated |
| -- with a subprogram specification. N is the pragma node, and S is the |
| -- entity for the related subprogram. This procedure does a preanalysis |
| -- of the expressions in the pragma as "spec expressions" (see section |
| -- in Sem "Handling of Default and Per-Object Expressions..."). |
| |
| function Check_Disabled (Nam : Name_Id) return Boolean; |
| -- This function is used in connection with pragmas Assertion, Check, |
| -- Precondition, and Postcondition, to determine if Check pragmas (or |
| -- corresponding Assert, Precondition, or Postcondition pragmas) are |
| -- currently disabled (as set by a Check_Policy or Assertion_Policy pragma |
| -- with the Disable argument). |
| |
| function Check_Enabled (Nam : Name_Id) return Boolean; |
| -- This function is used in connection with pragmas Assertion, Check, |
| -- Precondition, and Postcondition, to determine if Check pragmas (or |
| -- corresponding Assert, Precondition, or Postcondition pragmas) are |
| -- currently active, as determined by the presence of -gnata on the |
| -- command line (which sets the default), and the appearance of pragmas |
| -- Check_Policy and Assertion_Policy as configuration pragmas either in |
| -- a configuration pragma file, or at the start of the current unit. |
| -- True is returned if the specified check is enabled. |
| |
| function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean; |
| -- N is a pragma appearing in a configuration pragma file. Most such |
| -- pragmas are analyzed when the file is read, before parsing and analyzing |
| -- the main unit. However, the analysis of certain pragmas results in |
| -- adding information to the compiled main unit, and this cannot be done |
| -- till the main unit is processed. Such pragmas return True from this |
| -- function and in Frontend pragmas where Delay_Config_Pragma_Analyze is |
| -- True have their analysis delayed until after the main program is parsed |
| -- and analyzed. |
| |
| procedure Initialize; |
| -- Initializes data structures used for pragma processing. Must be called |
| -- before analyzing each new main source program. |
| |
| function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean; |
| -- The node N is a node for an entity and the issue is whether the |
| -- occurrence is a reference for the purposes of giving warnings about |
| -- unreferenced variables. This function returns True if the reference is |
| -- not a reference from this point of view (e.g. the occurrence in a pragma |
| -- Pack) and False if it is a real reference (e.g. the occurrence in a |
| -- pragma Export); |
| |
| function Is_Pragma_String_Literal (Par : Node_Id) return Boolean; |
| -- Given an N_Pragma_Argument_Association node, Par, which has the form of |
| -- an operator symbol, determines whether or not it should be treated as an |
| -- string literal. This is called by Sem_Ch6.Analyze_Operator_Symbol. If |
| -- True is returned, the argument is converted to a string literal. If |
| -- False is returned, then the argument is treated as an entity reference |
| -- to the operator. |
| |
| function Is_Config_Static_String (Arg : Node_Id) return Boolean; |
| -- This is called for a configuration pragma that requires either string |
| -- literal or a concatenation of string literals. We cannot use normal |
| -- static string processing because it is too early in the case of the |
| -- pragma appearing in a configuration pragmas file. If Arg is of an |
| -- appropriate form, then this call obtains the string (doing any necessary |
| -- concatenations) and places it in Name_Buffer, setting Name_Len to its |
| -- length, and then returns True. If it is not of the correct form, then an |
| -- appropriate error message is posted, and False is returned. |
| |
| procedure Make_Aspect_For_PPC_In_Gen_Sub_Decl (Decl : Node_Id); |
| -- This routine makes aspects from precondition or postcondition pragmas |
| -- that appear within a generic subprogram declaration. Decl is the generic |
| -- subprogram declaration node. Note that the aspects are attached to the |
| -- generic copy and also to the orginal tree. |
| |
| procedure Process_Compilation_Unit_Pragmas (N : Node_Id); |
| -- Called at the start of processing compilation unit N to deal with any |
| -- special issues regarding pragmas. In particular, we have to deal with |
| -- Suppress_All at this stage, since it can appear after the unit instead |
| -- of before (actually we allow it to appear anywhere). |
| |
| procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id); |
| -- This routine is used to set an encoded interface name. The node S is an |
| -- N_String_Literal node for the external name to be set, and E is an |
| -- entity whose Interface_Name field is to be set. In the normal case where |
| -- S contains a name that is a valid C identifier, then S is simply set as |
| -- the value of the Interface_Name. Otherwise it is encoded. See the body |
| -- for details of the encoding. This encoding is only done on VMS systems, |
| -- since it seems pretty silly, but is needed to pass some dubious tests in |
| -- the test suite. |
| |
| end Sem_Prag; |
