1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 2000-2011, 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 -- This package contains data and functions used to determine if a given unit
27 -- is an internal unit intended only for use by the implementation and which
28 -- should not be directly WITH'ed by user code. It also checks for Ada 05
29 -- units that should only be WITH'ed in Ada 05 mode.
31 with Types; use Types;
37 -- Unit from predefined library intended to be used only by the compiler
38 -- generated code, or from the implementation of the run time. Use of
39 -- such a unit generates a warning unless the client is compiled with
40 -- the -gnatg switch. If we are being super strict, this should be an
41 -- error for the case of Ada units, but that seems over strenuous.
44 -- This is not a predefined unit, so no checks are needed
47 -- This unit is defined in the Ada 95 RM, and can be freely with'ed in
48 -- both Ada 95 mode and Ada 05 mode. Note that in Ada 83 mode, no child
49 -- units are allowed, so you can't even name such a unit.
52 -- This unit is defined in the Ada 2005 RM. Withing this unit from an
53 -- Ada 95 mode program will generate a warning (again, strictly speaking
54 -- this should be an error, but that seems over-strenuous).
57 -- This unit is defined in the Ada 2012 RM. Withing this unit from an
58 -- Ada 95 or 2005 mode program will generate a warning (again, strictly
59 -- speaking this should be an error, but that seems over-strenuous).
61 function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit;
62 -- Given the unit number of a unit, this function determines the type
63 -- of the unit, as defined above. If the result is Implementation_Unit,
64 -- then the name of a possible atlernative equivalent unit is placed in
65 -- Error_Msg_String/Slen on return. If there is no alternative name, or if
66 -- the result is not Implementation_Unit, then Error_Msg_Slen is zero on
67 -- return, indicating that no alternative name was found.
69 function Is_Known_Unit (Nam : Node_Id) return Boolean;
70 -- Nam is the possible name of a child unit, represented as a selected
71 -- component node. This function determines whether the name matches one of
72 -- the known library units, and if so, returns True. If the name does not
73 -- match any known library unit, False is returned.
75 function Not_Impl_Defined_Unit (U : Unit_Number_Type) return Boolean;
76 -- This function returns True if U represents a unit that is permitted by
77 -- the restriction No_Implementation_Units (i.e. a unit in the Ada, System,
78 -- and Interfaces hierarchies that is defined in the RM, or a user defined
79 -- unit. It returns False if U represents a unit that is not permitted by
80 -- this restriction, which includes units in these three hierarchies that
81 -- are GNAT implementation defined. It also returns False for any units in
82 -- the GNAT hierarchy, which is not strictly conforming, but so obviously
83 -- useful that it is a reasonable deviation from the standard.