-- --
-- S p e c --
-- --
--- $Revision: 1.1 $ --
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2010, 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 2, or (at your option) any later ver- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- 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. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
procedure Analyze_Use_Package (N : Node_Id);
procedure Analyze_Use_Type (N : Node_Id);
- function Applicable_Use (Pack_Name : Node_Id) return Boolean;
- -- Common code to Use_One_Package and Set_Use, to determine whether
- -- use clause must be processed. Pack_Name is an entity name that
- -- references the package in question.
-
procedure End_Scope;
-- Called at end of scope. On exit from blocks and bodies (subprogram,
-- package, task, and protected bodies), the name of the current scope
-- specifications, more specialized procedures are invoked.
procedure End_Use_Clauses (Clause : Node_Id);
- -- Invoked on scope exit, to undo the effect of local use clauses. U is
- -- the first Use clause of a scope being exited. This can be the current
+ -- Invoked on scope exit, to undo the effect of local use clauses. Clause
+ -- is the first use-clause of a scope being exited. This can be the current
-- scope, or some enclosing scopes when building a clean environment to
-- compile an instance body for inlining.
-- appearing in context clauses.
procedure Find_Direct_Name (N : Node_Id);
- -- Given a direct name (Identifier or Operator_Symbol), this routine
- -- scans the homonym chain for the name searching for corresponding
- -- visible entities to find the referenced entity (or in the case of
- -- overloading), entities. On return, the Entity, and Etype fields
- -- are set. In the non-overloaded case, these are the correct final
- -- entries. In the overloaded case, Is_Overloaded is set, Etype and
- -- Entity refer to an arbitrary element of the overloads set, and
- -- an appropriate list of entries has been made in the overload
- -- interpretation table (to be disambiguated in the resolve phase).
-
- procedure Find_Expanded_Name (N : Node_Id);
- -- Selected component is known to be expanded name. Verify legality
- -- of selector given the scope denoted by prefix.
+ -- Given a direct name (Identifier or Operator_Symbol), this routine scans
+ -- the homonym chain for the name searching for corresponding visible
+ -- entities to find the referenced entity (or in the case of overloading,
+ -- entities). On return, the Entity and Etype fields are set. In the
+ -- non-overloaded case, these are the correct final entries. In the
+ -- overloaded case, Is_Overloaded is set, Etype and Entity refer to an
+ -- arbitrary element of the overloads set, and an appropriate list of
+ -- entries has been made in the overload interpretation table (to be
+ -- disambiguated in the resolve phase).
procedure Find_Selected_Component (N : Node_Id);
-- Resolve various cases of selected components, recognize expanded names
-- Perform name resolution, and verify that the name found is that of a
-- type. On return the Entity and Etype fields of the node N are set
-- appropriately. If it is an incomplete type whose full declaration has
- -- been seen, return the entity in the full declaration. Similarly, if
- -- the type is private, it has receivd a full declaration, and we are
- -- in the private part or body of the package, return the full
- -- declaration as well. Special processing for Class types as well.
-
- function Get_Full_View (T_Name : Entity_Id) return Entity_Id;
- -- If T_Name is an incomplete type and the full declaration has been
- -- seen, or is the name of a class_wide type whose root is incomplete.
- -- return the corresponding full declaration.
-
- function Has_Implicit_Operator (N : Node_Id) return Boolean;
- -- N is an expanded name whose selector is an operator name (eg P."+").
- -- A declarative part contains an implicit declaration of an operator
- -- if it has a declaration of a type to which one of the predefined
- -- operators apply. The existence of this routine is an artifact of
- -- our implementation: a more straightforward but more space-consuming
- -- choice would be to make all inherited operators explicit in the
- -- symbol table.
+ -- been seen, they are set to the entity in the full declaration. If it
+ -- is an incomplete type associated with an interface visible through a
+ -- limited-with clause, whose full declaration has been seen, they are
+ -- set to the entity in the full declaration. Similarly, if the type is
+ -- private, it has received a full declaration, and we are in the private
+ -- part or body of the package, then the two fields are set to the entity
+ -- of the full declaration as well. This procedure also has special
+ -- processing for 'Class attribute references.
procedure Initialize;
-- Initializes data structures used for visibility analysis. Must be
-- called before analyzing each new main source program.
- procedure Install_Use_Clauses (Clause : Node_Id);
- -- applies the use clauses appearing in a given declarative part,
+ procedure Install_Use_Clauses
+ (Clause : Node_Id;
+ Force_Installation : Boolean := False);
+ -- Applies the use clauses appearing in a given declarative part,
-- when the corresponding scope has been placed back on the scope
-- stack after unstacking to compile a different context (subunit or
- -- parent of generic body).
+ -- parent of generic body). Force_Installation is used when called from
+ -- Analyze_Subunit.Re_Install_Use_Clauses to insure that, after the
+ -- analysis of the subunit, the parent's environment is again identical.
function In_Open_Scopes (S : Entity_Id) return Boolean;
-- S is the entity of a scope. This function determines if this scope
-- is currently open (i.e. it appears somewhere in the scope stack).
- function Is_Appropriate_For_Record (T : Entity_Id) return Boolean;
- -- Prefix is appropriate for record if it is of a record type, or
- -- an access to such.
-
- function Is_Appropriate_For_Entry_Prefix (T : Entity_Id) return Boolean;
- -- True if it is of a task type, a protected type, or else an access
- -- to one of these types.
-
- procedure New_Scope (S : Entity_Id);
+ procedure Push_Scope (S : Entity_Id);
-- Make new scope stack entry, pushing S, the entity for a scope
-- onto the top of the scope table. The current setting of the scope
-- suppress flags is saved for restoration on exit.
function Present_System_Aux (N : Node_Id := Empty) return Boolean;
-- Return True if the auxiliary system file has been successfully loaded.
-- Otherwise attempt to load it, using the name supplied by a previous
- -- Extend_System pragma, and report on the success of the load.
- -- If N is present, it is a selected component whose prefix is System,
- -- or else a with-clause on system. N is absent when the function is
- -- called to find the visibility of implicit operators.
-
- procedure Restore_Scope_Stack;
- procedure Save_Scope_Stack;
- -- These two procedures are called from Semantics, when a unit U1 is
- -- to be compiled in the course of the compilation of another unit U2.
- -- This happens whenever Rtsfind is called. U1, the unit retrieved by
- -- Rtsfind, must be compiled in its own context, and the current scope
- -- stack containing U2 and local scopes must be made unreachable. On
- -- return, the contents of the scope stack must be made accessible again.
-
- procedure Use_One_Package (P : Entity_Id; N : Node_Id);
- -- Make visible entities declarated in package P potentially use-visible
- -- in the current context. Also used in the analysis of subunits, when
- -- re-installing use clauses of parent units. N is the use_clause that
- -- names P (and possibly other packages).
-
- procedure Use_One_Type (Id : Node_Id; N : Node_Id);
- -- Id is the subtype mark from a use type clause. This procedure makes
- -- the primitive operators of the type potentially use-visible.
- -- N is the Use_Type_Clause that names Id.
+ -- Extend_System pragma, and report on the success of the load. If N is
+ -- present, it is a selected component whose prefix is System, or else a
+ -- with-clause on system. N is absent when the function is called to find
+ -- the visibility of implicit operators.
+
+ procedure Restore_Scope_Stack (Handle_Use : Boolean := True);
+ procedure Save_Scope_Stack (Handle_Use : Boolean := True);
+ -- These two procedures are called from Semantics, when a unit U1 is to
+ -- be compiled in the course of the compilation of another unit U2. This
+ -- happens whenever Rtsfind is called. U1, the unit retrieved by Rtsfind,
+ -- must be compiled in its own context, and the current scope stack
+ -- containing U2 and local scopes must be made unreachable. On return, the
+ -- contents of the scope stack must be made accessible again. The flag
+ -- Handle_Use indicates whether local use clauses must be removed or
+ -- installed. In the case of inlining of instance bodies, the visibility
+ -- handling is done fully in Inline_Instance_Body, and use clauses are
+ -- handled there.
procedure Set_Use (L : List_Id);
-- Find use clauses that are declarative items in a package declaration
-- and set the potentially use-visible flags of imported entities before
-- analyzing the corresponding package body.
+ procedure ws;
+ -- Debugging routine for use in gdb: dump all entities on scope stack
+
end Sem_Ch8;
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