Overview
| Comment: | s_expressions-special_descriptors: new package that provide empty and erroneous descriptors |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
df682ad54a530741541e53b12a6a9fc0 |
| User & Date: | nat on 2015-03-19 18:01:13 |
| Other Links: | manifest | tags |
Context
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2015-03-27
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| 22:09 | time_statistics-generic_timers: fix stupid sign mistake check-in: 74297c4cff user: nat tags: trunk | |
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2015-03-19
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| 18:01 | s_expressions-special_descriptors: new package that provide empty and erroneous descriptors check-in: df682ad54a user: nat tags: trunk | |
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2015-03-18
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| 20:25 | constant_indefinite_ordered_map_tests: add a fully covering test suite for the new "mutation" constructors check-in: 6a2a4d94a0 user: nat tags: trunk | |
Changes
Added src/natools-s_expressions-special_descriptors.adb version [19d2e7e2ca].
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------------------------------------------------------------------------------
-- Copyright (c) 2015, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
package body Natools.S_Expressions.Special_Descriptors is
overriding function Current_Event
(Object : in Constant_Descriptor) return Events.Event is
begin
return Object.Event;
end Current_Event;
overriding function Current_Atom (Object : in Constant_Descriptor)
return Atom
is
pragma Unreferenced (Object);
begin
raise Program_Error with "Current_Atom called on a special descriptor";
return Null_Atom;
end Current_Atom;
overriding function Current_Level (Object : in Constant_Descriptor)
return Natural
is
pragma Unreferenced (Object);
begin
raise Program_Error with "Current_Level called on a special descriptor";
return 0;
end Current_Level;
overriding procedure Query_Atom
(Object : in Constant_Descriptor;
Process : not null access procedure (Data : in Atom))
is
pragma Unreferenced (Object, Process);
begin
raise Program_Error with "Query_Atom called on a special descriptor";
end Query_Atom;
overriding procedure Read_Atom
(Object : in Constant_Descriptor;
Data : out Atom;
Length : out Count)
is
pragma Unreferenced (Object, Data, Length);
begin
raise Program_Error with "Read_Atom called on a special descriptor";
end Read_Atom;
overriding procedure Next
(Object : in out Constant_Descriptor;
Event : out Events.Event)
is
pragma Unmodified (Object);
begin
Event := Object.Event;
end Next;
overriding procedure Lock
(Object : in out Constant_Descriptor;
State : out Lockable.Lock_State)
is
pragma Unreferenced (Object, State);
begin
raise Program_Error with "Lock called on a special descriptor";
end Lock;
overriding procedure Unlock
(Object : in out Constant_Descriptor;
State : in out Lockable.Lock_State;
Finish : in Boolean := True)
is
pragma Unreferenced (Object, State, Finish);
begin
raise Program_Error with "Unlock called on a special descriptor";
end Unlock;
end Natools.S_Expressions.Special_Descriptors;
|
Added src/natools-s_expressions-special_descriptors.ads version [c7ae277282].
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 |
------------------------------------------------------------------------------
-- Copyright (c) 2015, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
------------------------------------------------------------------------------
-- Natools.S_Expressions.Special_Descriptors provides descriptors blocked --
-- in End_Of_Input or Error states. --
-- The global variables should be task-safe, since there is no actual --
-- change in any of the primitives. --
------------------------------------------------------------------------------
with Natools.S_Expressions.Lockable;
package Natools.S_Expressions.Special_Descriptors is
pragma Preelaborate;
subtype Control_Event is Events.Event with Static_Predicate
=> Control_Event in Events.Error | Events.End_Of_Input;
type Constant_Descriptor (Event : Control_Event) is new Lockable.Descriptor
with null record;
overriding function Current_Event (Object : in Constant_Descriptor)
return Events.Event;
overriding function Current_Atom (Object : in Constant_Descriptor)
return Atom;
overriding function Current_Level (Object : in Constant_Descriptor)
return Natural;
overriding procedure Query_Atom
(Object : in Constant_Descriptor;
Process : not null access procedure (Data : in Atom));
overriding procedure Read_Atom
(Object : in Constant_Descriptor;
Data : out Atom;
Length : out Count);
overriding procedure Next
(Object : in out Constant_Descriptor;
Event : out Events.Event);
overriding procedure Lock
(Object : in out Constant_Descriptor;
State : out Lockable.Lock_State);
overriding procedure Unlock
(Object : in out Constant_Descriptor;
State : in out Lockable.Lock_State;
Finish : in Boolean := True);
Empty_Descriptor : Constant_Descriptor (Events.End_Of_Input);
Error_Descriptor : Constant_Descriptor (Events.Error);
end Natools.S_Expressions.Special_Descriptors;
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