------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G H O S T -- -- -- -- S p e c -- -- -- -- Copyright (C) 2014-2015, 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. -- -- -- ------------------------------------------------------------------------------ -- This package contains routines that deal with the static and runtime -- semantics of Ghost entities. with Types; use Types; package Ghost is procedure Add_Ignored_Ghost_Unit (Unit : Node_Id); -- Add a single ignored Ghost compilation unit to the internal table for -- post processing. procedure Check_Ghost_Completion (Partial_View : Entity_Id; Full_View : Entity_Id); -- Verify that the Ghost policy of a full view or a completion is the same -- as the Ghost policy of the partial view. Emit an error if this is not -- the case. procedure Check_Ghost_Context (Ghost_Id : Entity_Id; Ghost_Ref : Node_Id); -- Determine whether node Ghost_Ref appears within a Ghost-friendly context -- where Ghost entity Ghost_Id can safely reside. procedure Check_Ghost_Derivation (Typ : Entity_Id); -- Verify that the parent type and all progenitors of derived type or type -- extension Typ are Ghost. If this is not the case, issue an error. procedure Check_Ghost_Overriding (Subp : Entity_Id; Overridden_Subp : Entity_Id); -- Verify that the Ghost policy of parent subprogram Overridden_Subp is the -- same as the Ghost policy of overriding subprogram Subp. Emit an error if -- this is not the case. function Implements_Ghost_Interface (Typ : Entity_Id) return Boolean; -- Determine whether type Typ implements at least one Ghost interface procedure Initialize; -- Initialize internal tables procedure Lock; -- Lock internal tables before calling backend procedure Mark_Full_View_As_Ghost (Priv_Typ : Entity_Id; Full_Typ : Entity_Id); -- Set all Ghost-related attributes of type Full_Typ depending on the Ghost -- mode of incomplete or private type Priv_Typ. procedure Mark_Pragma_As_Ghost (Prag : Node_Id; Context_Id : Entity_Id); -- Set all Ghost-related attributes of pragma Prag if its context denoted -- by Id is a Ghost entity. procedure Mark_Renaming_As_Ghost (Ren_Decl : Node_Id; Nam_Id : Entity_Id); -- Set all Ghost-related attributes of renaming declaration Ren_Decl if its -- renamed name denoted by Nam_Id is a Ghost entity. procedure Remove_Ignored_Ghost_Code; -- Remove all code marked as ignored Ghost from the trees of all qualifying -- units. -- -- WARNING: this is a separate front end pass, care should be taken to keep -- it optimized. procedure Set_Ghost_Mode (N : Node_Id; Id : Entity_Id := Empty); -- Set the value of global variable Ghost_Mode depending on the following -- scenarios: -- -- If N is a declaration, determine whether N is subject to pragma Ghost. -- If this is the case, the Ghost_Mode is set based on the current Ghost -- policy in effect. Special cases: -- -- N is the completion of a deferred constant, the Ghost_Mode is set -- based on the mode of partial declaration entity denoted by Id. -- -- N is the full view of a private type, the Ghost_Mode is set based -- on the mode of the partial declaration entity denoted by Id. -- -- If N is an assignment statement or a procedure call, the Ghost_Mode is -- set based on the mode of the name. -- -- If N denotes a package or a subprogram body, the Ghost_Mode is set to -- the current Ghost policy in effect if the body is subject to Ghost or -- the corresponding spec denoted by Id is a Ghost entity. -- -- If N is a pragma, the Ghost_Mode is set based on the mode of the -- pragma. -- -- If N is a freeze node, the Global_Mode is set based on the mode of -- entity Id. -- -- WARNING: the caller must save and restore the value of Ghost_Mode in a -- a stack-like fasion as this routine may override the existing value. procedure Set_Ghost_Mode_From_Entity (Id : Entity_Id); -- Set the valye of global variable Ghost_Mode depending on the mode of -- entity Id. -- -- WARNING: the caller must save and restore the value of Ghost_Mode in a -- a stack-like fasion as this routine may override the existing value. procedure Set_Is_Ghost_Entity (Id : Entity_Id); -- Set the relevant Ghost attributes of entity Id depending on the current -- Ghost assertion policy in effect. end Ghost;