Overview
| Comment: | s_expressions-interpreter_loop: new generic procedure providing the main loop of a S-expression interpreter |
|---|---|
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
654fe8f62b33db03f7ca6626c036b341 |
| User & Date: | nat on 2014-05-20 20:03:54 |
| Other Links: | manifest | tags |
Context
|
2014-05-21
| ||
| 20:07 | static_hash_maps-s_expressions: add generated child packages for interpreter check-in: 83a3e25ae4 user: nat tags: trunk | |
|
2014-05-20
| ||
| 20:03 | s_expressions-interpreter_loop: new generic procedure providing the main loop of a S-expression interpreter check-in: 654fe8f62b user: nat tags: trunk | |
|
2014-05-19
| ||
| 18:37 | static_hash_maps-s_expressions: new package to run static hash map generator using a S-expression description check-in: ad65c67a84 user: nat tags: trunk | |
Changes
Added src/natools-s_expressions-interpreter_loop.adb version [3902fbdc5b].
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 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 |
------------------------------------------------------------------------------
-- Copyright (c) 2014, 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. --
------------------------------------------------------------------------------
procedure Natools.S_Expressions.Interpreter_Loop
(Expression : in out Natools.S_Expressions.Lockable.Descriptor'Class;
State : in out Shared_State;
Context : in Shared_Context)
is
Event : Events.Event := Expression.Current_Event;
Lock : Lockable.Lock_State;
begin
loop
case Event is
when Events.Add_Atom =>
Dispatch_Without_Argument
(State, Context, Expression.Current_Atom);
when Events.Open_List =>
Expression.Lock (Lock);
begin
Expression.Next (Event);
if Event = Events.Add_Atom then
declare
Name : constant Atom := Expression.Current_Atom;
begin
Expression.Next;
Dispatch_With_Arguments
(State, Context, Name, Expression);
end;
end if;
exception
when others =>
Expression.Unlock (Lock, False);
raise;
end;
Expression.Unlock (Lock);
Event := Expression.Current_Event;
exit when Event = Events.Error or Event = Events.End_Of_Input;
when Events.Close_List | Events.End_Of_Input | Events.Error =>
exit;
end case;
Expression.Next (Event);
end loop;
end Natools.S_Expressions.Interpreter_Loop;
|
Added src/natools-s_expressions-interpreter_loop.ads version [440b154b0c].
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > | 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 |
------------------------------------------------------------------------------
-- Copyright (c) 2014, 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.Interpreter_Loop is a generic procedure that --
-- implements the inner loop of S-expression interpreters, leaving command --
-- dispatching to the formal procedures. --
------------------------------------------------------------------------------
with Natools.S_Expressions.Lockable;
generic
type Shared_State (<>) is limited private;
type Shared_Context (<>) is limited private;
with procedure Dispatch_With_Arguments
(State : in out Shared_State;
Context : in Shared_Context;
Name : in Atom;
Arguments : in out Natools.S_Expressions.Lockable.Descriptor'Class)
is null;
with procedure Dispatch_Without_Argument
(State : in out Shared_State;
Context : in Shared_Context;
Name : in Atom)
is null;
procedure Natools.S_Expressions.Interpreter_Loop
(Expression : in out Natools.S_Expressions.Lockable.Descriptor'Class;
State : in out Shared_State;
Context : in Shared_Context);
pragma Pure (Natools.S_Expressions.Interpreter_Loop);
|