[cwn] Attn: Development Editor, Latest OCaml Weekly News
Alan Schmitt
alan.schmitt at polytechnique.org
Tue Jun 18 00:41:42 PDT 2019
Hello
Here is the latest OCaml Weekly News, for the week of June 11 to
18,
2019.
Table of Contents
─────────────────
Orsetto: structured data interchange languages (version 1.0)
OCaml release 4.08.0
Ocaml-multicore: report on a June 2018 development meeting in
Paris
Old CWN
Orsetto: structured data interchange languages (version 1.0)
════════════════════════════════════════════════════════════
Archive:
<https://discuss.ocaml.org/t/ann-orsetto-structured-data-interchange-languages-version-1-0/3920/1>
james woodyatt announced
────────────────────────
I am pleased to announce the release of version 1.0 of my
[Orsetto]
project. As I wrote in the *README* file about it:
Orsetto is a standalone library comprising a core toolkit…
• Core functional data structures and processes.
• Unicode transport, normalization, parsing and
formatting.
• General purpose packet format encoder-decoder processes.
…used to implement streaming parsers and formatters for a
useful variety of structured data interchange languages…
In this first release 1.0, the major featured languages are only
*JSON* and *CBOR*, but my hope is to expand this list to include
a
variety of other useful languages in the 1.x release series.
Moreover,
it's only non-build and non-test dependency is the OCaml
distribution
itself. The programming interfaces are fairly low-level, and
sufficiently different from other implementations that I feel
*Orsetto* may be a welcome alternative to other serialization
libraries.
*Orsetto* is [now available] at the community OPAM repository,
and
preview releases of forthcoming versions will continue to be
available at my personal repository in Bitbucket, which you can
use
in the conventional way:
┌────
│ opam repository add jhwoodyatt
git+https://bitbucket.org/jhw/opam-personal.git
└────
I have been hacking on various personal projects in OCaml for
about
seventeen years now, and *Orsetto* represents the portions of
all that
I find myself regularly reusing. I’m now promising the OCaml
community
to be as responsive to issues filed on [the Issue tracker] as my
day
job allows, and I welcome contributions and criticisms.
/p.s. Now that I'm no longer a Googler, I may now be free to
work on
some of the features that I deliberately avoided, in compliance
with
my employment contract while I was employed there./
[Orsetto] <https://bitbucket.org/jhw/orsetto>
[now available] <https://opam.ocaml.org/packages/orsetto/>
[the Issue tracker] <https://bitbucket.org/jhw/orsetto/issues>
OCaml release 4.08.0
════════════════════
Archive:
<https://sympa.inria.fr/sympa/arc/caml-list/2019-06/msg00020.html>
Damien Doligez announced
────────────────────────
We have the pleasure of celebrating the birthday of Alonzo
Church by
announcing the release of OCaml version 4.08.0.
Some of the highlights in this release are:
• Binding operators (let*, let+, and*, etc). They can be used to
streamline monadic code.
• `open' now applies to arbitrary module expression in
structures and
to applicative paths in signatures.
• A new notion of (user-defined) "alerts" generalizes the
deprecated
warning.
• New modules in the standard library: Fun, Bool, Int, Option,
Result.
• A significant number of new functions in Float, including FMA
support, and a new Float.Array submodule.
• Source highlighting for errors and warnings in batch mode.
• Many error messages were improved.
• Improved AFL instrumentation for objects and lazy values.
This release is (or soon will be) available as a set of OPAM
switches,
and as a source download here:
<https://caml.inria.fr/pub/distrib/ocaml-4.08/>
You can find more details at
<https://ocaml.org/releases/4.08.0.html>
Happy hacking,
Damien Doligez for the OCaml team.
(Changes that can break existing programs are marked with a "*")
Language features:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #1947: Introduce binding operators (let*, let+, and* etc.)
(Leo
White, review by Thomas Refis)
• #1892: Allow shadowing of items coming from an include (Thomas
Refis, review by Gabriel Radanne)
• #2122: Introduce local substitutions in signatures: "type t :=
type_expr" and "module M := Extended(Module).Path" (Thomas
Refis,
with help and review from Leo White, and Alain Frisch)
• #1804: New notion of "alerts" that generalizes the deprecated
warning [@@ocaml.alert deprecated "Please use bar
instead!"]
[@@ocaml.alert unsafe "Please use safe_foo instead!"]
(Alain
Frisch, review by Leo White and Damien Doligez)
• #6422, #7083, #305, #1568: Allow `exception' under or-patterns
(Thomas Refis, with help and review from Alain Frisch, Gabriel
Scherer, Jeremy Yallop, Leo White and Luc Maranget)
• #1705: Allow @@attributes on exception declarations. (Hugo
Heuzard,
review by Gabriel Radanne and Thomas Refis)
• #1506, #2147, #2166, #2167: Extended `open' to arbitrary
module
expression in structures and to applicative paths in
signatures
(Runhang Li, review by Alain Frisch, Florian Angeletti, Jeremy
Yallop, Leo White and Thomas Refis)
• * #2106: .~ is now a reserved keyword, and is no longer
available
for use in extended indexing operators (Jeremy Yallop, review
by
Gabriel Scherer, Florian Angeletti, and Damien Doligez)
• * #7841, #2041, #2235: allow modules from include directories
to
shadow other ones, even in the toplevel; for a example,
including a
directory that defines its own Result module will shadow the
stdlib's. (Jérémie Dimino, review by Alain Frisch and David
Allsopp)
Type system:
╌╌╌╌╌╌╌╌╌╌╌╌
• #2110: Partial support for GADTs inside or-patterns; The type
equalities introduced by the GADT constructor are only
available
inside the or-pattern; they cannot be used in the
right-hand-side of
the clause, when both sides of the or-pattern agree on it.
(Thomas
Refis and Leo White, review by Jacques Garrigue)
• #1826: allow expanding a type to a private abbreviation
instead of
abstracting when removing references to an identifier.
(Thomas
Refis and Leo White, review by Jacques Garrigue)
• #1942, #2244: simplification of the static check for recursive
definitions (Alban Reynaud and Gabriel Scherer, review by
Jeremy
Yallop, Armaël Guéneau and Damien Doligez)
Standard library:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #2128: Add Fun module: `id, const, flip, negate, protect'
(protect
is a "try_finally" combinator)
<https://caml.inria.fr/pub/docs/manual-ocaml/libref/Fun.html>
(Many
fine eyes)
• #2010: Add Bool module
<https://caml.inria.fr/pub/docs/manual-ocaml/libref/Bool.html>
(Many
fine eyes)
• #2011: Add Int module
<https://caml.inria.fr/pub/docs/manual-ocaml/libref/Int.html>
(Many
fine eyes)
• #1940: Add Option module and Format.pp_print_option `none,
some,
value, get, bind, join, map, fold, iter', etc.
<https://caml.inria.fr/pub/docs/manual-ocaml/libref/Option.html>
(Many fine eyes)
• #1956: Add Result module and Format.pp_print_result `ok,
error,
value, get_ok, bind, join, map, map_error', etc.
<https://caml.inria.fr/pub/docs/manual-ocaml/libref/Result.html>
(Many fine eyes)
• #1855, #2118: Add `Fun.protect ~finally' for enforcing local
invariants whether a function raises or not, similar to
`unwind-protect' in Lisp and `FINALLY' in Modula-2. It is
careful
about preserving backtraces and treating exceptions in finally
as
errors. (Marcello Seri and Guillaume Munch-Maccagnoni, review
by
Daniel Bünzli, Gabriel Scherer, François Bobot, Nicolás Ojeda
Bär,
Xavier Clerc, Boris Yakobowski, Damien Doligez, and Xavier
Leroy)
• * #1605: Deprecate Stdlib.Pervasives. Following #1010,
Pervasives is
no longer needed and Stdlib should be used instead. (Jérémie
Dimino, review by Nicolás Ojeda Bär)
• #2185: Add `List.filter_map' (Thomas Refis, review by Alain
Frisch
and Gabriel Scherer)
• #1957: Add Stack.{top_opt,pop_opt} and
Queue.{peek_opt,take_opt}.
(Vladimir Keleshev, review by Nicolás Ojeda Bär and Gabriel
Scherer)
• #1182: Add new Printf formats %#d %#Ld %#ld %#nd (idem for %i
and
%u) for alternative integer formatting – inserts '_' between
blocks
of digits. (ygrek, review by Gabriel Scherer)
• #1959: Add Format.dprintf, a printing function which outputs a
closure usable with %t. (Gabriel Radanne, request by Armaël
Guéneau, review by Florian Angeletti and Gabriel Scherer)
• #1986, #6450: Add Set.disjoint (Nicolás Ojeda Bär, review by
Gabriel
Scherer)
• #7812, #2125: Add Filename.chop_suffix_opt (Alain Frisch,
review by
Nicolás Ojeda Bär, suggestion by whitequark)
• #1864: Extend Bytes and Buffer with functions to read/write
binary
representations of numbers (Alain Frisch and Daniel Bünzli)
• #1458: Add unsigned operations unsigned_div, unsigned_rem,
unsigned_compare and unsigned_to_int to modules Int32, Int64,
Nativeint. (Nicolás Ojeda Bär, review by Daniel Bünzli, Alain
Frisch and Max Mouratov)
• #2002: Add Format.pp_print_custom_break, a new more general
kind of
break hint that can emit non-whitespace characters. (Vladimir
Keleshev and Pierre Weis, review by Josh Berdine, Gabriel
Radanne)
• #1966: Add Format semantic tags using extensible sum types.
(Gabriel Radanne, review by Nicolás Ojeda Bär)
• #1794: Add constants zero, one, minus_one and functions succ,
pred,
is_finite, is_infinite, is_nan, is_integer, trunc, round,
next_after, sign_bit, min, max, min_max, min_num, max_num,
min_max_num to module Float. (Christophe Troestler, review by
Alain
Frish, Xavier Clerc and Daniel Bünzli)
• #1354, #2177: Add fma support to Float module. (Laurent
Thévenoux,
review by Alain Frisch, Jacques-Henri Jourdan, Xavier Leroy)
• #5072, #6655, #1876: add aliases in Stdlib for built-in types
and
exceptions. (Jeremy Yallop, reports by Pierre Letouzey and
David
Sheets, review by Valentin Gatien-Baron, Gabriel Scherer and
Alain
Frisch)
• #1731: Format, use raise_notrace to preserve backtraces.
(Frédéric
Bour, report by Jules Villard, review by Gabriel Scherer)
• #6701, #1185, #1803: make float_of_string and string_of_float
locale-independent. (ygrek, review by Xavier Leroy and Damien
Doligez)
• #7795, #1782: Fix off-by-one error in Weak.create. (KC
Sivaramakrishnan, review by Gabriel Scherer and François
Bobot)
• #7235: Format, flush err_formatter at exit. (Pierre Weis,
request
by Jun Furuse)
• #1857, #7812: Remove Sort module, deprecated since 2000 and
emitting
a deprecation warning since 4.02. (whitequark)
• #1923: Arg module sometimes misbehaved instead of rejecting
invalid
-keyword=arg inputs (Valentin Gatien-Baron, review by Gabriel
Scherer)
• #1959: Small simplification and optimization to
Format.ifprintf
(Gabriel Radanne, review by Gabriel Scherer)
• #2119: clarify the documentation of Set.diff (Gabriel Scherer,
suggestion by John Skaller)
• #2145: Deprecate the mutability of Gc.control record fields
(Damien
Doligez, review by Alain Frisch)
• #2159, #7874: annotate {String,Bytes}.equal as being
[@@noalloc].
(Pierre-Marie Pédrot, review by Nicolás Ojeda Bär)
• #1936: Add module Float.Array (Damien Doligez, review by
Xavier
Clerc and Alain Frisch)
• #2183: Fix segfault in Array.create_float with
-no-flat-float-array
(Damien Doligez, review by Gabriel Scherer and Jeremy Yallop)
• #1525: Make function set_max_indent respect documentation
(Pierre
Weis, Richard Bonichon, review by Florian Angeletti)
• #2202: Correct Hashtbl.MakeSeeded.{add_seq,replace_seq,of_seq}
to
use functor hash function instead of default hash
function. Hashtbl.Make.of_seq shouldn't create randomized hash
tables. (David Allsopp, review by Alain Frisch)
Other libraries:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #2533, #1839, #1949: added Unix.fsync (Francois Berenger,
Nicolás
Ojeda Bär, review by Daniel Bünzli, David Allsopp and ygrek)
• #1792, #7794: Add Unix.open_process_args{,_in,_out,_full}
similar to
Unix.open_process{,_in,_out,_full}, but passing an explicit
argv
array. (Nicolás Ojeda Bär, review by Jérémie Dimino, request
by
Volker Diels-Grabsch)
• #1999: Add Unix.process{,_in,_out,_full}_pid to retrieve
opened
process's pid. (Romain Beauxis, review by Nicolás Ojeda Bär)
• #2222: Set default status in waitpid when pid is zero.
Otherwise,
status value is undefined. (Romain Beauxis and Xavier Leroy,
review
by Stephen Dolan)
• * #2104, #2211, #4127, #7709: Fix Thread.sigmask. When system
threads are loaded, Unix.sigprocmask is now an alias for
Thread.sigmask. This changes the behavior at least on MacOS,
where
Unix.sigprocmask used to change the masks of all threads.
(Jacques-Henri Jourdan, review by Jérémie Dimino)
• #1061: Add ?follow parameter to Unix.link. This allows
hardlinking
symlinks. (Christopher Zimmermann, review by Xavier Leroy,
Damien
Doligez, David Allsopp, David Sheets)
• #2038: Deprecate vm threads. OCaml supported both "native
threads",
based on pthreads, and its own green-threads implementation,
"vm
threads". We are not aware of any recent usage of "vm
threads", and
removing them simplifies further maintenance. (Jérémie
Dimino)
• * #4208, #4229, #4839, #6462, #6957, #6950, #1063, #2176,
2297: Make
#(nat)dynlink sound by correctly failing when dynlinked module
names
#clash with other modules or interfaces. (Mark Shinwell, Leo
White,
#Nicolás Ojeda Bär, Pierre Chambart)
• #2263: Delete the deprecated Bigarray.*.map_file functions in
favour
of `*_of_genarray (Unix.map_file ...)' functions instead. The
`Unix.map_file' function was introduced in OCaml 4.06.0
onwards.
(Jérémie Dimino, reviewed by David Allsopp and Anil
Madhavapeddy)
Compiler user-interface and warnings:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #2096: Add source highlighting for errors & warnings in batch
mode
(Armaël Guéneau, review by Gabriel Scherer and Jérémie Dimino)
• #2133: [@ocaml.warn_on_literal_pattern]: now warn on literal
patterns found anywhere in a constructor's arguments. (Jeremy
Yallop, review by Gabriel Scherer)
• #1720: Improve error reporting for missing 'rec' in
let-bindings.
(Arthur Charguéraud and Armaël Guéneau, with help and advice
from
Gabriel Scherer, Frédéric Bour, Xavier Clerc and Leo White)
• #7116, #1430: new -config-var option to get the value of a
single
configuration variable in scripts. (Gabriel Scherer, review
by
Sébastien Hinderer and David Allsopp, request by Adrien Nader)
• #1733,1993,1998,2058,2094,2140: Typing error message
improvements
• #1733, change the perspective of the unexpected existential
error
message.
• #1993, expanded error messages for universal quantification
failure
• #1998, more context for unbound type parameter error
• #2058, full explanation for unsafe cycles in recursive
module
definitions (suggestion by Ivan Gotovchits)
• #2094, rewording for "constructor has no type" error
• #7565, #2140, more context for universal variable escape in
method
type
(Florian Angeletti, reviews by Jacques Garrique, Armaël
Guéneau,
Gabriel Radanne, Gabriel Scherer and Jeremy Yallop)
• #1913: new flag -dump-into-file to print debug output like
-dlambda
into a file named after the file being built, instead of on
stderr.
(Valentin Gatien-Baron, review by Thomas Refis)
• #1921: in the compilation context passed to ppx extensions,
add more
configuration options related to type-checking: -rectypes,
-principal, -alias-deps, -unboxed-types, -unsafe-string
(Gabriel
Scherer, review by Gabriel Radanne, Xavier Clerc and Frédéric
Bour)
• #1976: Better error messages for extension constructor type
mismatches (Thomas Refis, review by Gabriel Scherer)
• #1841, #7808: the environment variable OCAMLTOP_INCLUDE_PATH
can now
specify a list of additional include directories for the ocaml
toplevel. (Nicolás Ojeda Bär, request by Daniel Bünzli,
review by
Daniel Bünzli and Damien Doligez)
• #6638, #1110: introduced a dedicated warning to report unused
"open!" statements (Alain Frisch, report by dwang, review by
and
design from Leo White)
• #1974: Trigger warning 5 in "let _ = e" and "ignore e" if e is
of
function type and syntactically an application. (For the case
of
"ignore e" the warning already existed, but used to be
triggered
even when e was not an application.) (Nicolás Ojeda Bär,
review by
Alain Frisch and Jacques Garrigue)
• #7408, #7846, #2015: Check arity of primitives. (Hugo
Heuzard,
review by Nicolás Ojeda Bär)
• #2091: Add a warning triggered by type declarations "type t =
()"
(Armaël Guéneau, report by linse, review by Florian Angeletti
and
Gabriel Scherer)
• #2004: Use common standard library path `lib/ocaml' for
Windows, for
consistency with OSX & Linux. Previously was located at `lib'.
(Bryan Phelps, Jordan Walke, review by David Allsopp)
• #6416, #1120: unique printed names for identifiers (Florian
Angeletti, review by Jacques Garrigue)
• #1691: add shared_libraries to ocamlc -config exporting
SUPPORTS_SHARED_LIBRARIES from Makefile.config. (David
Allsopp,
review by Gabriel Scherer and Mark Shinwell)
• #6913, #1786: new -match-context-rows option to control the
degree
of optimization in the pattern matching compiler. (Dwight
Guth,
review by Gabriel Scherer and Luc Maranget)
• #1822: keep attributes attached to pattern variables from
being
discarded. (Nicolás Ojeda Bär, review by Thomas Refis)
• #1845: new `-dcamlprimc' option to keep the generated C file
containing the information about primitives; pass
`-fdebug-prefix-map' to the C compiler when supported, for
reproducible builds (Xavier Clerc, review by Jérémie Dimino)
• #1856, #1869: use `BUILD_PATH_PREFIX_MAP' when compiling
primitives
in order to make builds reproducible if code contains uses of
`__FILE__' or `__LOC__' (Xavier Clerc, review by Gabriel
Scherer and
Sébastien Hinderer)
• #1906: the -unsafe option does not apply to marshalled ASTs
passed
to the compiler directly or by a -pp preprocessor; add a
proper
warning (64) instead of a simple stderr message (Valentin
Gatien-Baron)
• #1925: Print error locations more consistently between batch
mode,
toplevel and expect tests (Armaël Guéneau, review by Thomas
Refis,
Gabriel Scherer and François Bobot)
• #1930: pass the elements from `BUILD_PATH_PREFIX_MAP' to the
assembler (Xavier Clerc, review by Gabriel Scherer, Sébastien
Hinderer, and Xavier Leroy)
• #1945, #2032: new "-stop-after [parsing|typing]" option to
stop
compilation after the parsing or typing pass (Gabriel Scherer,
review by Jérémie Dimino)
• #1953: Add locations to attributes in the parsetree. (Hugo
Heuzard,
review by Gabriel Radanne)
• #1954: Add locations to toplevel directives. (Hugo Heuzard,
review
by Gabriel Radanne)
• * #1979: Remove support for TERM=norepeat when displaying
errors
(Armaël Guéneau, review by Gabriel Scherer and Florian
Angeletti)
• #1960: The parser keeps previous location when relocating ast
node.
(Hugo Heuzard, review by Jérémie Dimino)
• #7864, #2109: remove duplicates from spelling suggestions.
(Nicolás
Ojeda Bär, review by Armaël Guéneau)
Manual and documentation:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #7548: printf example in the tutorial part of the manual
(Kostikova
Oxana, rewiew by Gabriel Scherer, Florian Angeletti, Marcello
Seri
and Armaël Guéneau)
• #7546, #2020: preambles and introduction for compiler-libs.
(Florian Angeletti, review by Daniel Bünzli, Perry E. Metzger
and
Gabriel Scherer)
• #7547, #2273: Tutorial on Lazy expressions and patterns in
OCaml
Manual (Ulugbek Abdullaev, review by Florian Angeletti and
Gabriel
Scherer)
• #7720, #1596, precise the documentation of the maximum
indentation
limit in Format. (Florian Angeletti, review by Richard
Bonichon and
Pierre Weis)
• #7825: html manual split compilerlibs from stdlib in the html
index
of modules (Florian Angeletti, review by Perry E. Metzger and
Gabriel Scherer)
• #1209, #2008: in the Extension section, use the caml_example
environment (uses the compiler to check the example code).
This
change was made possible by a lot of tooling work from Florian
Angeletti: #1702, #1765, #1863, and Gabriel Scherer's #1903.
(Gabriel Scherer, review by Florian Angeletti)
• #1788, 1831, 2007, 2198, 2232, move language extensions to the
core
chapters:
• #1788: quoted string description
• #1831: local exceptions and exception cases
• #2007: 32-bit, 64-bit and native integer literals
• #2198: lazy patterns
• #2232: short object copy notation
(Florian Angeletti, review by Xavier Clerc, Perry E. Metzger,
Gabriel Scherer and Jeremy Yallop)
• #1863: caml-tex2, move to compiler-libs (Florian Angeletti,
review
by Sébastien Hinderer and Gabriel Scherer)
• #2105: Change verbatim to caml_example in documentation
(Maxime
Flin, review by Florian Angeletti)
• #2114: ocamldoc, improved manpages for documentation inside
modules
(Florian Angeletti, review by Gabriel Scherer)
• #2117: stdlib documentation, duplicate the operator precedence
table
from the manual inside a separate "OCaml_operators" module.
(Florian Angeletti, review by Daniel Bünzli, Perry E. Metzger
and
Gabriel Scherer)
• #2187: document "exception A | pat" patterns (Florian
Angeletti,
review by Perry E. Metzger and Jeremy Yallop)
• #8508: refresh \moduleref macro (Florian Angeletti, review by
Gabriel Scherer)
Code generation and optimizations:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #7725, #1754: improve AFL instrumentation for objects and lazy
values. (Stephen Dolan)
• #1631: AMD64 code generator: emit shorter instruction
sequences for
the sign-extension operations. (LemonBoy, review by Alain
Frisch
and Xavier Leroy)
• #7246, #2146: make a few int64 primitives use [@@unboxed]
stubs on
32bits (Jérémie Dimino)
• #1917: comballoc: ensure object allocation order is preserved
(Stephen Dolan)
• #6242, #2143, #8558, #8559: Optimize some local functions.
Local
functions that do not escape and whose calls all have the same
continuation are lowered into a static-catch handler. (Alain
Frisch, review by Gabriel Scherer)
• #2082: New options [-insn-sched] and [-no-insn-sched] to
control
instruction scheduling. (Mark Shinwell, review by Damien
Doligez)
• #2239: Fix match miscompilation with flambda (Leo White,
review by
Alain Frisch)
Runtime system:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #7198, #7750, #1738: add a function (caml_alloc_custom_mem)
and
three GC parameters to give the user better control of the
out-of-heap memory retained by custom values; use the function
to
allocate bigarrays and I/O channels. (Damien Doligez, review
by
Alain Frisch)
• #1793: add the -m and -M command-line options to ocamlrun.
Option
-m prints the magic number of the bytecode executable passed
as
argument, -M prints the magic number expected by ocamlrun.
(Sébastien Hinderer, review by Xavier Clerc and Damien
Doligez)
• #1867: Remove the C plugins mechanism. (Xavier Leroy, review
by
David Allsopp, Damien Doligez, Sébastien Hinderer)
• #8627: Require SSE2 for 32-bit mingw port to generate correct
code
for caml_round with GCC 7.4. (David Allsopp, review by Xavier
Leroy)
• #7676, #2144: Remove old GC heuristic (Damien Doligez, report
and
review by Alain Frisch)
• #1723: Remove internal Meta.static_{alloc,free} primitives.
(Stephen Dolan, review by Gabriel Scherer)
• #1895: Printexc.get_callstack would return only one frame in
native
code in threads other then the initial one (Valentin
Gatien-Baron,
review by Xavier Leroy)
• #1900, #7814: avoid exporting non-prefixed identifiers in the
debug
and instrumented runtimes. (Damien Doligez, report by Gabriel
Scherer)
• #2079: Avoid page table lookup in Pervasives.compare with
no-naked-pointers (Sam Goldman, review by Gabriel Scherer,
David
Allsopp, Stephen Dolan)
• #7829, #8585: Fix pointer comparisons in freelist.c (for
32-bit
platforms) (David Allsopp and Damien Doligez)
• #8567, #8569: on ARM64, use 32-bit loads to access
caml_backtrace_active (Xavier Leroy, review by Mark Shinwell
and
Greta Yorsh)
• #8568: Fix a memory leak in mmapped bigarrays (Damien Doligez,
review by Xavier Leroy and Jérémie Dimino)
Tools
╌╌╌╌╌
• #2182: Split Emacs caml-mode as an independent project.
(Christophe
Troestler, review by Gabriel Scherer)
• #1865: support dark themes in Emacs, and clean up usage of
deprecated Emacs APIs (Wilfred Hughes, review by Clément
Pit-Claudel)
• #1590: ocamllex-generated lexers can be instructed not to
update
their lex_curr_p/lex_start_p fields, resulting in a
significant
performance gain when those fields are not required. (Alain
Frisch,
review by Jérémie Dimino)
• #7843, #2013: ocamldoc, better handling of {{!label}text} in
the
latex backend. (Florian Angeletti, review by Nicolás Ojeda
Bär and
Gabriel Scherer)
• #7844, #2040: Emacs, use built-in detection of comments, fixes
an
imenu crash. (Wilfred Hughes, review by Christophe Troestler)
• #7850: Emacs, use symbol boundaries in regular expressions,
fixes an
imenu crash. (Wilfred Hughes, review by Christophe Troestler)
• #1711: the new 'open' flag in OCAMLRUNPARAM takes a
comma-separated
list of modules to open as if they had been passed via the
command
line -open flag. (Nicolás Ojeda Bär, review by Mark Shinwell)
• #2000: ocamdoc, extended support for "include module type of
…"
(Florian Angeletti, review by Jérémie Dimino)
• #2045: ocamlmklib now supports options -args and -args0 to
provide
extra command-line arguments in a file. (Nicolás Ojeda Bär,
review
by Gabriel Scherer and Daniel Bünzli)
• #2189: change ocamldep Makefile-output to print each
dependency on a
new line, for more readable diffs of versioned dependencies.
(Gabriel Scherer, review by Nicolás Ojeda Bär)
• #2223: ocamltest: fix the "bsd" and "not-bsd" built-in actions
to
recognize all BSD variants (Damien Doligez, review by
Sébastien
Hinderer and David Allsopp)
Compiler distribution build system:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #1776: add -no-install-bytecode-programs and related configure
options to control (non-)installation of ".byte" executables.
(Mark
Shinwell, review by Sébastien Hinderer and Gabriel Scherer)
• #1777: add -no-install-source-artifacts and related configure
options to control installation of .cmt, .cmti, .mli and .ml
files.
(Mark Shinwell, review by Nicolás Ojeda Bär and Sébastien
Hinderer)
• #1781: cleanup of the manual's build process. (steinuil,
review by
Marcello Seri, Gabriel Scherer and Florian Angeletti)
• #1797: remove the deprecated Makefile.nt files. (Sébastien
Hinderer, review by Nicolas Ojeda Bar)
• #1805: fix the bootstrap procedure and its documentation.
(Sébastien Hinderer, Xavier Leroy and Damien Doligez; review
by
Gabriel Scherer)
• #1840: build system enhancements. (Sébastien Hinderer, review
by
David Allsopp, Xavier Leroy and Damien Doligez)
• #1852: merge runtime directories (Sébastien Hinderer, review
by
Xavier Leroy and Damien Doligez)
• #1854: remove the no longer defined BYTECCCOMPOPTS build
variable.
(Sébastien Hinderer, review by Damien Doligez)
• #2024: stop supporting obsolete platforms: Rhapsody (old beta
version of MacOS X, BeOS, alpha*-*-linux*, mips-*-irix6*,
alpha*-*-unicos, powerpc-*-aix, *-*-solaris2*,
mips*-*-irix[56]*,
i[3456]86-*-darwin[89].*, i[3456]86-*-solaris*, *-*-sunos*
*-*-unicos. (Sébastien Hinderer, review by Xavier Leroy,
Damien
Doligez, Gabriel Scherer and Armaël Guéneau)
• #2053: allow unix, vmthreads and str not to be built. (David
Allsopp, review by Sébastien Hinderer)
• * #2059: stop defining OCAML_STDLIB_DIR in s.h. (Sébastien
Hinderer, review by David Allsopp and Damien Doligez)
• * #2066: remove the standard_runtime configuration variable.
(Sébastien Hinderer, review by Xavier Leroy, Stephen Dolan and
Damien Doligez)
• * #2139: use autoconf to generate the compiler's configuration
script (Sébastien Hinderer, review by Damien Doligez and David
Allsopp)
• #2148: fix a parallel build bug involving CamlinternalLazy.
(Stephen Dolan, review by Gabriel Scherer and Nicolas Ojeda
Bar)
• #2264, #7904: the configure script now sets the Unicode
handling
mode under Windows according to the value of the variable
WINDOWS_UNICODE_MODE. If WINDOWS_UNICODE_MODE is "ansi" then
it is
assumed to be the current code page encoding. If
WINDOWS_UNICODE_MODE is "compatible" or empty or not set at
all,
then encoding is UTF-8 with code page fallback. (Nicolás
Ojeda Bär,
review by Sébastien Hinderer and David Allsopp)
• #2266: ensure Cygwin ports configure with `EXE=.exe', or the
compiler is unable to find the camlheader files (subtle
regression
of #2139/2041) (David Allsopp, report and review by Sébastien
Hinderer)
• #7919, #2311: Fix assembler detection in configure (Sébastien
Hinderer, review by David Allsopp)
• #2295: Restore support for bytecode target XLC/AIX/Power
(Konstantin
Romanov, review by Sébastien Hinderer and David Allsopp)
• #8528: get rid of the direct call to the C preprocessor in the
testsuite (Sébastien Hinderer, review by David Allsopp)
• #7938, #8532: Fix alignment detection for ints on 32-bits
platforms
(Sébastien Hinderer, review by Xavier Leroy)
• * #8533: Remove some unused configure tests (Stephen Dolan,
review
by David Allsopp and Sébastien Hinderer)
• #2207, #8604: Add opam files to allow pinning (Leo White,
Greta
Yorsh, review by Gabriel Radanne)
• #8616: configure: use variables rather than arguments for a
few
options (Sébastien Hinderer, review by David Allsopp, Gabriel
Scherer and Damien Doligez)
• #8632: Correctly propagate flags for –with-pic in configure.
(David
Allsopp, review by Sébastien Hinderer and Damien Doligez)
• #8673: restore SpaceTime and libunwind support in configure
script
(Sébastien Hinderer, review by Damien Doligez)
Internal/compiler-libs changes:
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌
• #7918, #1703, #1944, #2213, #2257: Add the module
Compile_common,
which factorizes the common part in Compile and Optcompile.
This
also makes the pipeline more modular. (Gabriel Radanne, help
from
Gabriel Scherer and Valentin Gatien-Baron, review by Mark
Shinwell
and Gabriel Radanne, regression spotted by Clément Franchini)
• #292: use Menhir as the parser generator for the OCaml parser.
Satellite GPRs: #1844, #1846, #1853, #1850, #1934, #2151,
#2174
(Gabriel Scherer, Nicolás Ojeda Bär, Frédéric Bour, Thomas
Refis and
François Pottier, review by Nicolás Ojeda Bär, Leo White and
David
Allsopp)
• #374: use Misc.try_finally for resource cleanup in the
compiler
codebase. This should fix the problem of catch-and-reraise
`try
.. with' blocks destroying backtrace information – in the
compiler.
(François Bobot, help from Gabriel Scherer and Nicolás Ojeda
Bär,
review by Gabriel Scherer)
• #1148, #1287, #1288, #1874: significant improvements of the
tools/check-typo script used over the files of the whole
repository;
contributors are now expected to check that check-typo passes
on
their pull requests; see CONTRIBUTING.md for more details.
(David
Allsopp, review by Damien Doligez and Sébastien Hinderer)
• #1610, #2252: Remove positions from paths (Leo White, review
by
Frédéric Bour and Thomas Refis)
• #1745: do not generalize the type of every sub-pattern, only
of
variables. (preliminary work for GADTs in or-patterns) (Thomas
Refis, review by Leo White)
• #1909: unsharing pattern types (preliminary work for GADTs in
or-patterns) (Thomas Refis, with help from Leo White, review
by
Jacques Garrigue)
• #1748: do not error when instantiating polymorphic fields in
patterns. (Thomas Refis, review by Gabriel Scherer)
• #2317: type_let: be more careful generalizing parts of the
pattern
(Thomas Refis and Leo White, review by Jacques Garrigue)
• #1746: remove unreachable error variant: Make_seltype_nongen.
(Florian Angeletti, review by Gabriel Radanne)
• #1747: type_cases: always propagate (preliminary work for
GADTs in
or-patterns) (Thomas Refis, review by Jacques Garrigue)
• #1811: shadow the polymorphic comparison in the middle-end
(Xavier
Clerc, review by Pierre Chambart)
• #1833: allow non-val payloads in CMM Ccatch handlers (Simon
Fowler,
review by Xavier Clerc)
• #1866: document the release process (Damien Doligez and
Gabriel
Scherer, review by Sébastien Hinderer, Perry E. Metzger,
Xavier
Leroy and David Allsopp)
• #1886: move the Location.absname reference to Clflags.absname
(Armaël Guéneau, review by Jérémie Dimino)
• #1894: generalize highlight_dumb in location.ml to handle
highlighting several locations (Armaël Guéneau, review by
Gabriel
Scherer)
• #1903: parsetree, add locations to all nodes with attributes
(Gabriel Scherer, review by Thomas Refis)
• #1905: add check-typo-since to check the files changed since a
given
git reference (Gabriel Scherer, review by David Allsopp)
• #1910: improve the check-typo use of .gitattributes (Gabriel
Scherer, review by David Allsopp and Damien Doligez)
• #1938: always check ast invariants after preprocessing
(Florian
Angeletti, review by Alain Frisch and Gabriel Scherer)
• #1941: refactor the command line parsing of ocamlcp and
ocamloptp
(Valentin Gatien-Baron, review by Florian Angeletti)
• #1948: Refactor Stdlib.Format. Notably, use Stdlib.Stack and
Stdlib.Queue, and avoid exceptions for control flow.
(Vladimir
Keleshev, review by Nicolás Ojeda Bär and Gabriel Scherer)
• * #1952: refactor the code responsible for displaying errors
and
warnings `Location.report_error' is removed, use
`Location.print_report' instead (Armaël Guéneau, review by
Thomas
Refis)
• #7835, #1980, #8548, #8586: separate scope from stamp in
idents and
explicitly rescope idents when substituting signatures.
(Thomas
Refis, review by Jacques Garrigue and Leo White)
• #1996: expose Pprintast.longident to help compiler-libs users
print
Longident.t values. (Gabriel Scherer, review by Florian
Angeletti
and Thomas Refis)
• #2030: makefile targets to build AST files of sources for
parser
testing. See parsing/HACKING.adoc. (Gabriel Scherer, review
by
Nicolás Ojeda Bär)
• * #2041: add a cache for looking up files in the load path
(Jérémie
Dimino, review by Alain Frisch and David Allsopp)
• #2047, #2269: a new type for unification traces (Florian
Angeletti,
report by Leo White (#2269), review by Thomas Refis and
Gabriel
Scherer)
• #2055: Add [Linearize.Lprologue]. (Mark Shinwell, review by
Pierre
Chambart)
• #2056: Use [Backend_var] rather than [Ident] from [Clambda]
onwards;
use [Backend_var.With_provenance] for variables in binding
position.
(Mark Shinwell, review by Pierre Chambart)
• #2060: "Phantom let" support for the Clambda language. (Mark
Shinwell, review by Vincent Laviron)
• #2065: Add [Proc.destroyed_at_reloadretaddr]. (Mark Shinwell,
review by Damien Doligez)
• #2070: "Phantom let" support for the Cmm language. (Mark
Shinwell,
review by Vincent Laviron)
• #2072: Always associate a scope to a type (Thomas Refis,
review by
Jacques Garrigue and Leo White)
• #2074: Correct naming of record field inside [Ialloc] terms.
(Mark
Shinwell, review by Jérémie Dimino)
• #2076: Add [Targetint.print]. (Mark Shinwell)
• #2080: Add [Proc.dwarf_register_numbers] and
[Proc.stack_ptr_dwarf_register_number]. (Mark Shinwell,
review by
Bernhard Schommer)
• #2088: Add [Clambda.usymbol_provenance]. (Mark Shinwell,
review by
Damien Doligez)
• #2152, #2517: refactorize the fixpoint to compute type-system
properties of mutually-recursive type declarations. (Gabriel
Scherer and Rodolphe Lepigre, review by Armaël Guéneau)
• #2156: propagate more type information through Lambda and
Clambda
intermediate language, as a preparation step for more future
optimizations (Pierre Chambart and Alain Frisch,
cross-reviewed by
themselves)
• #2160: restore –disable-shared support and ensure testsuite
runs
correctly when compiled without shared library support.
(David
Allsopp, review by Damien Doligez and Sébastien Hinderer)
• * #2173: removed TypedtreeMap (Thomas Refis, review by Gabriel
Scherer)
• #7867: Fix #mod_use raising an exception for filenames with no
extension. (Geoff Gole)
• #2100: Fix Unix.getaddrinfo when called on strings containing
null
bytes; it would crash the GC later on. (Armaël Guéneau,
report and
fix by Joe, review by Sébastien Hinderer)
• #7847, #2019: Fix an infinite loop that could occur when the
(Menhir-generated) parser encountered a syntax error in a
certain
specific state. (François Pottier, report by Stefan Muenzel,
review
by Frédéric Bour, Thomas Refis, Gabriel Scherer)
• #1626: Do not allow recursive modules in `with module' (Leo
White,
review by Gabriel Radanne)
• #7726, #1676: Recursive modules, equi-recursive types and
stack
overflow (Jacques Garrigue, report by Jeremy Yallop, review by
Leo
White)
• #7723, #1698: Ensure `with module' and `with type' do not
weaken
module aliases. (Leo White, review by Gabriel Radanne and
Jacques
Garrigue)
• #1719: fix Pervasives.LargeFile functions under Windows.
(Alain
Frisch)
• #1739: ensure ocamltest waits for child processes to terminate
on
Windows. (David Allsopp, review by Sébastien Hinderer)
• #7554, #1751: Lambda.subst: also update debug event
environments
(Thomas Refis, review by Gabriel Scherer)
• #7238, #1825: in Unix.in_channel_of_descr and
Unix.out_channel_of_descr, raise an error if the given file
description is not suitable for character-oriented I/O, for
example
if it is a block device or a datagram socket. (Xavier Leroy,
review
by Jérémie Dimino and Perry E. Metzger)
• #7799, #1820: fix bug where Scanf.format_from_string could
fail when
the argument string contained characters that require
escaping.
(Gabriel Scherer and Nicolás Ojeda Bär, report by Guillaume
Melquiond, review by Gabriel Scherer)
• #1843: ocamloptp was doing the wrong thing with option
-inline-max-unroll. (Github user @poechsel, review by Nicolás
Ojeda
Bär).
• #1890: remove last use of Ctype.unroll_abbrev (Thomas Refis,
report
by Leo White, review by Jacques Garrigue)
• #1893: dev-branch only, warning 40(name not in scope)
triggered
spurious warnings 49(missing cmi) with -no-alias-deps.
(Florian
Angeletti, report by Valentin Gatien-Baron, review by Gabriel
Scherer)
• #1912: Allow quoted strings, octal/unicode escape sequences
and
identifiers containing apostrophes in ocamllex actions and
comments.
(Pieter Goetschalckx, review by Damien Doligez)
• #7828, #1935: correct the conditions that generate warning 61,
Unboxable_type_in_prim_decl (Stefan Muenzel)
• #1958: allow [module M(_:S) = struct end] syntax (Hugo
Heuzard,
review by Gabriel Scherer)
• #1970: fix order of floatting documentation comments in
classes
(Hugo Heuzard, review by Nicolás Ojeda Bär)
• #1977: [@@ocaml.warning "…"] attributes attached to type
declarations are no longer ignored. (Nicolás Ojeda Bär,
review by
Gabriel Scherer)
• #7830, #1987: fix ocamldebug crash when printing a value in
the
scope of an `open' statement for which the `.cmi' is not
available.
(Nicolás Ojeda Bär, report by Jocelyn Sérot, review by Gabriel
Scherer)
• #7854, #2062: fix an issue where the wrong locale may be used
when
using the legacy ANSI encoding under Windows. (Nicolás Ojeda
Bär,
report by Tiphaine Turpin)
• #2083: Fix excessively aggressive float unboxing and introduce
similar fix as a preventative measure for boxed int unboxing.
(Thomas Refis, Mark Shinwell, Leo White)
• #2130: fix printing of type variables with a quote in their
name
(Alain Frisch, review by Armaël Guéneau and Gabriel Scherer,
report
by Hugo Heuzard)
• #2131: fix wrong calls to Env.normalize_path on non-module
paths
(Alain Frisch, review by Jacques Garrigue)
• #2175: Apply substitution to all modules when packing (Leo
White,
review by Gabriel Scherer)
• #2220: Remove duplicate process management code in
otherlibs/threads/unix.ml (Romain Beauxis, review by Gabriel
Scherer
and Alain Frisch)
• #2231: Env: always freshen persistent signatures before using
them
(Thomas Refis and Leo White, review by Gabriel Radanne)
• #7851, #8570: Module type of allows to transform a malformed
module
type into a vicious signature, breaking soundness (Jacques
Garrigue,
review by Leo White)
• #7923, #2259: fix regression in FlexDLL bootstrapped build
caused by
refactoring the root Makefile for Dune in #2093) (David
Allsopp,
report by Marc Lasson)
• #7929, #2261: Subst.signature: call cleanup_types exactly once
(Thomas Refis, review by Gabriel Scherer and Jacques Garrigue,
report by Daniel Bünzli and Jon Ludlam)
• #8550, #8552: Soundness issue with class generalization
(Jacques
Garrigue, review by Leo White and Thomas Refis, report by
Jeremy
Yallop)
Ocaml-multicore: report on a June 2018 development meeting in
Paris
═══════════════════════════════════════════════════════════════════
Archive:
<https://discuss.ocaml.org/t/ocaml-multicore-report-on-a-june-2018-development-meeting-in-paris/2202/8>
Deep in this thread, gasche said
────────────────────────────────
We had another development meeting at the end of April where
Stephen
Dolan was invited to give a progress report on Multicore. Things
have
been progressing, although of course at a slower pace than
anticipated
(personally I'm not terribly surprised given the complexity of
the
whole thing, but that's what you get for announcing more
specific time
periods :-). In terms of the original document we are still in
the
"build-up PRs" and "forward-compatible C API" phase, and things
are
moving along nicely.
One interesting recent development is that the buildup of a
comprehensive runtime-benchmarking tool (the
not-terribly-easy-to-use
interface is at <http://ocamllabs.io/multicore/>), which makes
it
possible to get concrete numbers on the performance overhead
introduced by the runtime changes. The numbers are not final in
any
way yet (there is a lot of room for tuning), but it helps
evaluate
design choices and in fact I understand that the multicore
authors
have started exploring some alternative choices now that they
have
numbers to compare options concretely. (Takes time, but gives a
stronger implementation overall.)
On the social front: the overall consensus that we want to merge
the
multicore runtime still stands, there is no worries to be had
about
that. I think it would be rather foolish to make a statement
about
this "happening by date XYZ" given the low likelihood of getting
such
a date right. On the other hand, if you want to help, please
feel free
to help reviewing any of the open PRs, and/or have a look at the
[Multicore Roadmap] which has lists of tasks still to be done.
[Multicore Roadmap]
<https://github.com/ocaml-multicore/ocaml-multicore/projects/3>
Old CWN
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