+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S E M _ C A T --
--- --
--- S p e c --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1992-2000 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- --
--- 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. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This unit contains the routines used for checking for conformance with
--- the semantic restrictions required for the categorization pragmas:
---
--- Preelaborate
--- Pure,
--- Remote_Call_Interface
--- Remote_Types
--- Shared_Passive
---
--- Note that we treat Preelaborate as a categorization pragma, even though
--- strictly, according to RM E.2(2,3), the term does not apply in this case.
-
-with Types; use Types;
-
-package Sem_Cat is
-
- function In_Preelaborated_Unit return Boolean;
- -- Determines if the current scope is within a preelaborated compilation
- -- unit, that is one to which one of the pragmas Preelaborate, Pure,
- -- Shared_Passive, Remote_Types, or inside a unit other than a package
- -- body with pragma Remote_Call_Interface.
-
- function In_Pure_Unit return Boolean;
- pragma Inline (In_Pure_Unit);
- -- Determines if the current scope is within pure compilation unit,
- -- that is, one to which the pragmas Pure is applied.
-
- function In_Subprogram_Task_Protected_Unit return Boolean;
- -- Determines if the current scope is within a subprogram, task
- -- or protected unit. Used to validate if the library unit is Pure
- -- (RM 10.2.1(16)).
-
- procedure Set_Categorization_From_Pragmas (N : Node_Id);
- -- Since validation of categorization dependency is done during analyze
- -- so categorization flags from following pragmas should be set before
- -- validation begin. N is the N_Compilation_Unit node.
-
- procedure Validate_Access_Type_Declaration (T : Entity_Id; N : Node_Id);
- -- Validate all constraints against declaration of access types in
- -- categorized library units. Usually this is a violation in Pure unit,
- -- Shared_Passive unit. N is the declaration node.
-
- procedure Validate_Ancestor_Part (N : Node_Id);
- -- Checks that a type given as the ancestor in an extension aggregate
- -- satisfies the restriction of 10.2.1(9).
-
- procedure Validate_Categorization_Dependency (N : Node_Id; E : Entity_Id);
- -- There are restrictions on lib unit that semantically depends on other
- -- units (RM E.2(5), 10.2.1(11). This procedure checks the restrictions
- -- on categorizations. N is the current unit node, and E is the current
- -- library unit entity.
-
- procedure Validate_Controlled_Object (E : Entity_Id);
- -- Given an entity for a library level controlled object, check that it is
- -- not in a preelaborated unit (prohibited by RM 10.2.1(9)).
-
- procedure Validate_Null_Statement_Sequence (N : Node_Id);
- -- Given N, a package body node, check that a handled statement sequence
- -- in a preelaborable body contains no statements other than labels or
- -- null statements, as required by RM 10.2.1(6).
-
- procedure Validate_Object_Declaration (N : Node_Id);
- -- Given N, an object declaration node, validates all the constraints in
- -- a preelaborable library unit, including creation of task objects etc.
- -- Note that this is called when the corresponding object is frozen since
- -- the checks cannot be made before knowing if the object is imported.
-
- procedure Validate_RCI_Declarations (P : Entity_Id);
- -- Apply semantic checks given in E2.3(10-14).
-
- procedure Validate_RCI_Subprogram_Declaration (N : Node_Id);
- -- Check for RCI unit subprogram declarations with respect to
- -- in-lined subprogram and subprogram with access parameter or
- -- limited type parameter without Read and Write.
-
- procedure Validate_Remote_Access_To_Class_Wide_Type (N : Node_Id);
- -- Checks that Storage_Pool and Storage_Size attribute references are
- -- not applied to remote access-to-class-wide types. And the expected
- -- type for an allocator shall not be a remote access-to-class-wide
- -- type. And a remote access-to-class-wide type shall not be an actual
- -- parameter for a generic formal access type. RM E.2.3(22).
-
- procedure Validate_Remote_Access_To_Subprogram_Type (N : Node_Id);
- -- Checks that a remote access to subprogram type does not have a
- -- parameter of an access type. This is not strictly forbidden at this
- -- time, but this is useless, as such a RAS type will not be usable
- -- per E.2.2(12) and E.2.3(14).
-
- procedure Validate_RT_RAT_Component (N : Node_Id);
- -- Given N, the package library unit declaration node, we should check
- -- against RM:9.95 E.2.2(8): the full view of a type declared in the
- -- visible part of a Remote Types unit has a part that is of a non-remote
- -- access type which has no read/write.
-
- procedure Validate_Remote_Type_Type_Conversion (N : Node_Id);
- -- Check for remote-type type conversion constraints. First, a value of
- -- a remote access-to-subprogram type can be converted only to another
- -- type conformant remote access-to-subprogram type. Secondly, a value
- -- of a remote access-to-class-wide type can be converted only to another
- -- remote access-to-class-wide type (RM E.2.3(17,20)).
-
- procedure Validate_SP_Access_Object_Type_Decl (T : Entity_Id);
- -- Check validity of declaration if shared passive unit. It should not
- -- contain the declaration of an access-to-object type whose designated
- -- type is a class-wide type ,task type or protected type. E.2.1(7).
- -- T is the entity of the declared type.
-
- procedure Validate_Static_Object_Name (N : Node_Id);
- -- In the elaboration code of a preelaborated library unit, check
- -- that we do not have the evaluation of a primary that is a name of
- -- an object, unless the name is a static expression (RM 10.2.1(8)).
- -- Non-static constant and variable are the targets, generic parameters
- -- are not included because the generic declaration and body are
- -- preelaborable.
-
-end Sem_Cat;
projects / msp430-gcc.git / blobdiff