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use delimcc in a new module, SequenceInvert, in order

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to reverse the control flow (here with conversion to Gen)
This commit is contained in:
Simon Cruanes 2014-06-10 01:53:22 +02:00
parent 5d73e99652
commit bebc312b85
6 changed files with 124 additions and 4 deletions
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4
META
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@ -1,6 +1,6 @@
# OASIS_START
# DO NOT EDIT (digest: 8fe7646cd958ccfd4ec565a95fe6b68c)
version = "0.3.7"
# DO NOT EDIT (digest: 1e28d93f3671e8db9acf63b73cdbca82)
version = "0.4.1"
description = "Simple sequence (iterator) datatype and combinators"
archive(byte) = "sequence.cma"
archive(byte, plugin) = "sequence.cma"

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_oasis
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@ -1,6 +1,6 @@
OASISFormat: 0.4
Name: sequence
Version: 0.3.7
Version: 0.4.1
Homepage: https://github.com/c-cube/sequence
Authors: Simon Cruanes
License: BSD-2-clause
@ -19,10 +19,23 @@ Flag bench
Description: enable benchmarks (require library Benchmark)
Default: false
Flag invert
Description: build sequence.invert (requires Delimcc)
Default: false
Library "sequence"
Path: .
Modules: Sequence
Library "invert"
Path: invert
Build$: flag(invert)
Install$: flag(invert)
Modules: SequenceInvert
FindlibName: invert
FindlibParent: sequence
BuildDepends: sequence,delimcc
Document sequence
Title: Sequence docs
Type: ocamlbuild (0.3)

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_tags
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@ -1,5 +1,5 @@
# OASIS_START
# DO NOT EDIT (digest: 34c62fcaf6a79f081a2b2c5cf44cbe05)
# DO NOT EDIT (digest: ffd3fbaf00b431777fea1b8279203bf9)
# Ignore VCS directories, you can use the same kind of rule outside
# OASIS_START/STOP if you want to exclude directories that contains
# useless stuff for the build process
@ -15,5 +15,16 @@
"_darcs": not_hygienic
# Library sequence
"sequence.cmxs": use_sequence
# Executable benchs
"bench/benchs.native": pkg_benchmark
"bench/benchs.native": use_sequence
# Executable bench_persistent
"bench/bench_persistent.native": pkg_benchmark
"bench/bench_persistent.native": use_sequence
# Executable bench_persistent_read
"bench/bench_persistent_read.native": pkg_benchmark
"bench/bench_persistent_read.native": use_sequence
<bench/*.ml{,i}>: pkg_benchmark
<bench/*.ml{,i}>: use_sequence
# OASIS_STOP
true: bin_annot

2
invert/.merlin Normal file
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@ -0,0 +1,2 @@
REC
PKG delimcc

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invert/sequenceInvert.ml Normal file
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(*
Copyright (c) 2014, Simon Cruanes
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer. Redistributions in binary
form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with
the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*)
(** {1 Interface to Delimcc (Invert control flow)} *)
type 'a gen = unit -> 'a option
type 'a res =
| Start
| Yield of 'a
| Stop
let _ret_none () = None
let _ret_unit () = ()
let to_gen seq =
let p = Delimcc.new_prompt () in
let _next = ref None in
ignore (Delimcc.push_prompt p
(fun () ->
Delimcc.take_subcont p (fun c () -> _next := Some c; Start);
seq
(fun x ->
Delimcc.take_subcont p (fun c () -> _next := Some c; Yield x)
);
_next := None;
Stop
));
(* call next subcont *)
let rec next () =
match !_next with
| None -> None
| Some f ->
begin match Delimcc.push_delim_subcont f _ret_unit with
| Start -> next ()
| Yield x -> Some x
| Stop -> None
end
in
next

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invert/sequenceInvert.mli Normal file
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(*
Copyright (c) 2014, Simon Cruanes
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer. Redistributions in binary
form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with
the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*)
(** {1 Interface to Delimcc (Invert control flow)} *)
type 'a gen = unit -> 'a option
val to_gen : 'a Sequence.t -> 'a gen
(** Use delimited continuations to iterate on the sequence step by step.
Relatively costly but still useful *)