Objective Caml 3.04:
--------------------
Type-checker:
- Allowed coercing self to the type of the current class, avoiding
an obscure error message about "Self type cannot be unified..."
Both compilers:
- Use OCAMLLIB environment variable to find standard library, falls
back on CAMLLIB if not defined.
- Report out-of-range ASCII escapes in character or string literals
such as "\256".
Byte-code compiler:
- The -use-runtime and -make-runtime flags are back by popular demand
(same behavior as in 3.02).
- Dynamic loading (of the C part of mixed Caml/C libraries): arrange that
linking in -custom mode uses the static libraries for the C parts,
not the shared libraries, for maximal robustness and compatibility with
3.02.
Native-code compiler:
- Fixed bug in link-time consistency checking.
Tools:
- ocamlyacc: added parser debugging support (set OCAMLRUNPARAM=p to get
a trace of the pushdown automaton actions).
- ocamlcp: was broken in 3.03 (Sys_error), fixed.
Run-time system:
- More work on dynamic loading of the C part of mixed Caml/C libraries.
- On uncaught exception, flush output channels before printing exception
message and backtrace.
- Corrected several errors in exception backtraces.
Standard library:
- Pervasives: integer division and modulus are now fully specified
on negative arguments (with round-towards-zero semantics).
- Pervasives.float_of_string: now raises Failure on ill-formed input.
- Pervasives: added useful float constants max_float, min_float, epsilon_float.
- printf functions in Printf and Format: added % formats for int32, nativeint,
int64; "*" in width and precision specifications now supported
(contributed by Thorsten Ohl).
- Added Hashtbl.copy, Stack.copy.
- Hashtbl: revised resizing strategy to avoid quadratic behavior
on Hashtbl.add.
- New module MoreLabels providing labelized versions of modules
Hashtbl, Map and Set.
- Pervasives.output_value and Marshal.to_* : improved hashing strategy
for internal data structures, avoid excessive slowness on
quasi-linearly-allocated inputs.
Other libraries:
- Num: fixed bug in big integer exponentiation (Big_int.power_*).
Windows port:
- New GUI for interactive toplevel (Jacob Navia).
- The Graphics library is now available for stand-alone executables
(Jacob Navia).
- Unix library: improved reporting of system error codes.
- Fixed error in "globbing" of * and ? patterns on command line.
Emacs mode: small fixes; special color highlighting for ocamldoc comments.
License: added special exception to the LGPL'ed code (libraries and
runtime system) allowing unrestricted linking, whether static or dynamic.
Objective Caml 3.03 ALPHA:
--------------------------
Language:
- Removed built-in syntactic sugar for streams and stream patterns
[< ... >], now supported via CamlP4, which is now included in the
distribution.
- Switched the default behaviour to labels mode (labels are compulsory),
but allows omitting labels when a function application is complete.
-nolabels mode is available but deprecated for programming.
(See also scrapelabels and addlabels tools below.)
- Removed all labels in the standard libraries, except labltk.
Labelized versions are kept for ArrayLabels, ListLabels, StringLabels
and UnixLabels. "open StdLabels" gives access to the first three.
- Extended polymorphic variant type syntax, allowing union types and
row abbreviations for both sub- and super-types. #t deprecated in types.
- See the Upgrading file for how to adapt to all the changes above.
Type-checker:
- Fixed obscure bug in module typing causing the type-checker to loop
on signatures of the form
module type M
module A: sig module type T = sig module T: M end end
module B: A.T
- Improved efficiency of module type-checking via lazy computation of
certain signature summary information.
- An empty polymorphic variant type is now an error.
Both compilers:
- Fixed wrong code generated for "struct include M ... end" when M
contains one or several "external" declarations.
Byte-code compiler:
- Protect against VM stack overflow caused by module initialization code
with many local variables.
- Support for dynamic loading of the C part of mixed Caml/C libraries.
- Removed the -use-runtime and -make-runtime flags, obsoleted by dynamic
loading of C libraries.
Native-code compiler:
- Attempt to recover gracefully from system stack overflow. Currently
works on x86 under Linux and BSD.
- Alpha: work around "as" bug in Tru64 5.1.
Toplevel environment:
- Revised printing of inferred types and evaluation results
so that an external printer (e.g. Camlp4's) can be hooked in.
Tools:
- The CamlP4 pre-processor-pretty-printer is now included in the standard
distribution.
- New tool ocamlmklib to help build mixed Caml/C libraries.
- New tool scrapelabels and addlabels, to either remove (non-optional)
labels in interfaces, or automatically add them in the definitions.
They provide easy transition from classic mode ocaml 3.02 sources,
depending on whether you want to keep labels or not.
- ocamldep: added -pp option to handle preprocessed source files.
Run-time system:
- Support for dynamic loading of the C part of mixed Caml/C libraries.
Currently works under Linux, FreeBSD, Windows, Tru64, Solaris and Irix.
- Implemented registration of global C roots with a skip list,
runs much faster when there are many global C roots.
- Autoconfiguration script: fixed wrong detection of Mac OS X; problem
with the Sparc, gcc 3.0, and float alignment fixed.
Standard library:
- Added Pervasives.flush_all to flush all opened output channels.
Other libraries:
- All libraries revised to allow dynamic loading of the C part.
- Graphics under X Windows: revised event handling, should no longer lose
mouse events between two calls to wait_next_event(); wait_next_event()
now interruptible by signals.
- Bigarrays: fixed bug in marshaling of big arrays.
Windows port:
- Fixed broken Unix.{get,set}sockopt*
Objective Caml 3.02:
--------------------
Both compilers:
- Fixed embarrassing bug in pattern-matching compilation
(affected or-patterns containing variable bindings).
- More optimizations in pattern-matching compilation.
Byte-code compiler:
- Protect against VM stack overflow caused by functions with many local
variables.
Native-code compiler:
- Removed re-sharing of string literals, causes too many surprises with
in-place string modifications.
- Corrected wrong compilation of toplevel "include" statements.
- Fixed bug in runtime function "callbackN_exn".
- Signal handlers receive the conventional signal number as argument
instead of the system signal number (same behavior as with the
bytecode compiler).
- ARM port: fixed issue with immediate operand overflow in large functions.
Toplevel environment:
- User-definer printers (for #install_printer) now receive as first argument
the pretty-printer formatter where to print their second argument.
Old printers (with only one argument) still supported for backward
compatibility.
Standard library:
- Module Hashtbl: added Hashtbl.fold.
Other libraries:
- Dynlink: better error reporting in add_interfaces for missing .cmi files.
- Graphics: added more drawing functions (multiple points, polygons,
multiple lines, splines).
- Bytecode threads: the module Unix is now thread-safe, ThreadUnix is
deprecated. Unix.exec* now resets standard descriptors to blocking mode.
- Native threads: fixed a context-switch-during-GC problem causing
certain C runtime functions to fail, most notably input_value.
- Unix.inet_addr_of_string: call inet_aton() when available so as to
handle correctly the address 255.255.255.255.
- Unix: added more getsockopt and setsockopt functions to get/set
options that have values other than booleans.
- Num: added documentation for the Big_int module.
Tools:
- ocamldep: fixed wrong dependency issue with nested modules.
Run-time system:
- Removed floating-point error at start-up on some non-IEEE platforms
(e.g. FreeBSD prior to 4.0R).
- Stack backtrace mechanism now works for threads that terminate on
an uncaught exception.
Auto-configuration:
- Updated config.guess and config.sub scripts, should recognize a greater
number of recent platform.
Windows port:
- Fixed broken Unix.waitpid. Unix.file_descr can now be compared or hashed.
- Toplevel application: issue with spaces in name of stdlib directory fixed.
MacOS 9 port:
- Removed the last traces of support for 68k
Objective Caml 3.01:
--------------------
New language features:
- Variables are allowed in "or" patterns, e.g.
match l with [t] | [_;t] -> ... t ...
- "include <structure expression>" to re-export all components of a
structure inside another structure.
- Variance annotation on parameters of type declarations, e.g.
type (+'a,-'b,'c) t (covariant in 'a, contravariant in 'b, invariant in 'c)
New ports:
- Intel IA64/Itanium under Linux (including the native-code compiler).
- Cygwin under MS Windows. This port is an alternative to the earlier
Windows port of OCaml, which relied on MS compilers; the Cygwin
Windows port does not need MS Visual C++ nor MASM, runs faster
in bytecode, and has a better implementation of the Unix library,
but currently lacks threads and COM component support.
Type-checking:
- Relaxed "monomorphic restriction" on type constructors in a
mutually-recursive type definition, e.g. the following is again allowed
type u = C of int t | D of string t and 'a t = ...
- Fixed name-capture bug in "include SIG" and "SIG with ..." constructs.
- Improved implicit subtypes built by (... :> ty), closer to intuition.
- Several bug fixes in type-checking of variants.
- Typing of polymorphic variants is more restrictive:
do not allow conjunctive types inside the same pattern matching.
a type has either an upper bound, or all its tags are in the lower bound.
This may break some programs (this breaks lablgl-0.94).
Both compilers:
- Revised compilation of pattern matching.
- Option -I +<subdir> to search a subdirectory <subdir> of the standard
library directory (i.e. write "ocamlc -I +labltk" instead of
"ocamlc -I /usr/local/lib/ocaml/labltk").
- Option -warn-error to turn warnings into errors.
- Option -where to print the location of the standard library directory.
- Assertions are now type-checked even if the -noassert option is given,
thus -noassert can no longe change the types of modules.
Bytecode compiler and bytecode interpreter:
- Print stack backtrace when a program aborts due to an uncaught exception
(requires compilation with -g and running with ocamlrun -b or
OCAMLRUNPARAM="b=1").
Native-code compiler:
- Better unboxing optimizations on the int32, int64, and nativeint types.
- Tail recursion preserved for functions having more parameters than
available registers (but tail calls to other functions are still
turned off if parameters do not fit entirely in registers).
- Fixed name-capture bug in function inlining.
- Improved spilling/reloading strategy for conditionals.
- IA32, Alpha: better alignment of branch targets.
- Removed spurious dependency on the -lcurses library.
Toplevel environment:
- Revised handling of top-level value definitions, allows reclaimation
of definitions that are shadowed by later definitions with the same names.
(E.g. "let x = <big list>;; let x = 1;;" allows <big list> to be reclaimed.)
- Revised the tracing facility so that for standard library functions,
only calls from user code are traced, not calls from the system.
- Added a "*" prompt when within a comment.
Runtime system:
- Fixed portability issue on bcopy() vs memmove(), affecting Linux RedHat 7.0
in particular.
- Structural comparisons (=, <>, <, <=, >, >=, compare) reimplemented
so as to avoid overflowing the C stack.
- Input/output functions: arrange so that reads and writes on closed
in_channel or out_channel raise Sys_error immediately.
Standard library:
- Module Gc: changed some counters to float in order to avoid overflow;
added alarms
- Module Hashtbl: added Hashtbl.replace.
- Module Int64: added bits_of_float, float_of_bits (access to IEEE 754
representation of floats).
- Module List: List.partition now tail-rec;
improved memory behavior of List.stable_sort.
- Module Nativeint: added Nativeint.size (number of bits in a nativeint).
- Module Obj: fixed incorrect resizing of float arrays in Obj.resize.
- Module Pervasives: added float constants "infinity", "neg_infinity", "nan";
added a "classify_float" function to test a float for NaN, infinity, etc.
- Pervasives.input_value: fixed bug affecting shared custom objects.
- Pervasives.output_value: fixed size bug affecting "int64" values.
- Pervasives.int_of_string, {Int32,Int64,Nativeint}.of_string:
fixed bug causing bad digits to be accepted without error.
- Module Random: added get_state and set_state to checkpoint the generator.
- Module Sys: signal handling functions are passed the system-independent
signal number rather than the raw system signal number whenever possible.
- Module Weak: added Weak.get_copy.
Other libraries:
- Bigarray: added Bigarray.reshape to take a view of the elements of a
bigarray with different dimensions or number of dimensions;
fixed bug causing "get" operations to be unavailable in custom
toplevels including Bigarray.
- Dynlink: raise an error instead of crashing when the loaded module
refers to the not-yet-initialized module performing a dynlink operation.
- Bytecode threads: added a thread-safe version of the Marshal module;
fixed a rare GC bug in the thread scheduler.
- POSIX threads: fixed compilation problem with threads.cmxa.
- Both thread libraries: better tail-recursion in Event.sync.
- Num library: fixed bug in square roots (Nat.sqrt_nat, Big_int.sqrt_big_int).
Tools:
- ocamldep: fixed missing dependencies on labels of record patterns and
record construction operations
Win32 port:
- Unix.waitpid now implements the WNOHANG option.
Mac OS ports:
- Mac OS X public beta is supported.
- Int64.format works on Mac OS 8/9.
Objective Caml 3.00:
--------------------
Language:
- OCaml/OLabl merger:
* Support for labeled and optional arguments for functions and classes.
* Support for variant types (sum types compared by structure).
See tutorial (chapter 2 of the OCaml manual) for more information.
- Syntactic change: "?" in stream error handlers changed to "??".
- Added exception renaming in structures (exception E = F).
- (OCaml 2.99/OLabl users only) Label syntax changed to preserve
backward compatibility with 2.0x (labeled function application
is f ~lbl:arg instead of f lbl:arg). A tool is provided to help
convert labelized programs to OCaml 3.00.
Both compilers:
- Option -labels to select commuting label mode (labels are mandatory,
but labeled arguments can be passed in a different order than in
the definition of the function; in default mode, labels may be omitted,
but argument reordering is only allowed for optional arguments).
- Libraries (.cma and .cmxa files) now "remember" C libraries given
at library construction time, and add them back at link time.
Allows linking with e.g. just unix.cma instead of
unix.cma -custom -cclib -lunix
- Revised printing of error messages, now use Format.fprintf; no visible
difference for users, but could facilitate internationalization later.
- Fixed bug in unboxing of records containing only floats.
- Fixed typing bug involving applicative functors as components of modules.
- Better error message for inconsistencies between compiled interfaces.
Bytecode compiler:
- New "modular" format for bytecode executables; no visible differences
for users, but will facilitate further extensions later.
- Fixed problems in signal handling.
Native-code compiler:
- Profiling support on x86 under FreeBSD
- Open-coding and unboxing optimizations for the new integer types
int32, int64, nativeint, and for bigarrays.
- Fixed instruction selection bug with "raise" appearing in arguments
of strict operators, e.g. "1 + raise E".
- Better error message when linking incomplete/incorrectly ordered set
of .cmx files.
- Optimized scanning of global roots during GC, can reduce total running
time by up to 8% on GC-intensive programs.
Interactive toplevel:
- Better printing of exceptions, including arguments, when possible.
- Fixed rare GC bug occurring during interpretation of scripts.
- Added consistency checks between interfaces and implementations
during #load.
Run-time system:
- Added support for "custom" heap blocks (heap blocks carrying
C functions for finalization, comparison, hashing, serialization
and deserialization).
- Support for finalisation functions written in Caml.
Standard library:
- New modules Int32, Int64, Nativeint for 32-bit, 64-bit and
platform-native integers
- Module Array: added Array.sort, Array.stable_sort.
- Module Gc: added Gc.finalise to attach Caml finalisation functions to
arbitrary heap-allocated data.
- Module Hashtbl: do not bomb when resizing very large table.
- Module Lazy: raise Lazy.Undefined when a lazy evaluation needs itself.
- Module List: added List.sort, List.stable_sort; fixed bug in List.rev_map2.
- Module Map: added mapi (iteration with key and data).
- Module Set: added iterators for_all, exists, filter, partition.
- Module Sort: still here but deprecated in favor of new sorting functions
in Array and List.
- Module Stack: added Stack.top
- Module String: fixed boundary condition on String.rindex_from
- Added labels on function arguments where appropriate.
New libraries and tools:
- ocamlbrowser: graphical browser for OCaml sources and compiled interfaces,
supports cross-referencing, editing, running the toplevel.
- LablTK: GUI toolkit based on TK, using labeled and optional arguments,
easier to use than CamlTK.
- Bigarray: large, multi-dimensional numerical arrays, facilitate
interfacing with C/Fortran numerical code, efficient support for
advanced array operations such as slicing and memory-mapping of files.
Other libraries:
- Bytecode threads: timer-based preemption was broken, works back again;
fixed bug in Pervasives.input_line; exported Thread.yield.
- System threads: several GC / reentrancy bugs fixed in buffered I/O
and Unix I/O; revised Thread.join implementation for strict POSIX
conformance; exported Thread.yield.
- Graphics: added support for double buffering; added, current_x, current_y,
rmoveto, rlineto, and draw_rect.
- Num: fixed bug in Num.float_of_num.
- Str: worked around potential symbol conflicts with C standard library.
- Dbm: fixed bug with Dbm.iter on empty database.
New or updated ports:
- Alpha/Digital Unix: lifted 256M limitation on total memory space
induced by -taso
- Port to AIX 4.3 on PowerPC
- Port to HPUX 10 on HPPA
- Deprecated 680x0 / SunOS port
Macintosh port:
- Implemented the Unix and Thread libraries.
- The toplevel application does not work on 68k Macintoshes; maybe
later if there's a demand.
- Added a new tool, ocamlmkappli, to build an application from a
program written in O'Caml.
Objective Caml 2.04:
--------------------
- C interface: corrected inconsistent change in the CAMLparam* macros.
- Fixed internal error in ocamlc -g.
- Fixed type-checking of "S with ...", where S is a module type name
abbreviating another module type name.
- ocamldep: fixed stdout/stderr mismatch after failing on one file.
- Random.self_init more random.
- Windows port:
- Toplevel application: fixed spurious crash on exit.
- Native-code compiler: fixed bug in assembling certain
floating-point constants (masm doesn't grok 2e5, wants 2.0e5).
Objective Caml 2.03:
--------------------
New ports:
- Ported to BeOS / Intel x86 (bytecode and native-code).
- BSD / Intel x86 port now supports both a.out and ELF binary formats.
- Added support for {Net,Open}BSD / Alpha.
- Revamped Rhapsody port, now works on MacOS X server.
Syntax:
- Warning for "(*)" and "*)" outside comment.
- Removed "#line LINENO", too ambiguous with a method invocation;
the equivalent "# LINENO" is still supported.
Typing:
- When an incomplete pattern-matching is detected, report also a
value or value template that is not covered by the cases of
the pattern-matching.
- Several bugs in class type matching and in type error reporting fixed.
- Added an option -rectypes to support general recursive types,
not just those involving object types.
Bytecode compiler:
- Minor cleanups in the bytecode emitter.
- Do not remove "let x = y" bindings in -g mode; makes it easier to
debug the code.
Native-code compiler:
- Fixed bug in grouping of allocations performed in the same basic block.
- Fixed bug in constant propagation involving expressions containing
side-effects.
- Fixed incorrect code generation for "for" loops whose upper bound is
a reference assigned inside the loop.
- MIPS code generator: work around a bug in the IRIX 6 assembler.
Toplevel:
- Fixed incorrect redirection of standard formatter to stderr
while executing toplevel scripts.
Standard library:
- Added List.rev_map, List.rev_map2.
- Documentation of List functions now says which functions are
tail-rec, and how much stack space is needed for non-tailrec functions.
- Wrong type for Printf.bprintf fixed.
- Fixed weird behavior of Printf.sprintf and Printf.bprintf in case of
partial applications.
- Added Random.self_init, which initializes the PRNG from the system date.
- Sort.array: serious bugs fixed.
- Stream.count: fixed incorrect behavior with ocamlopt.
Run-time system and external interface:
- Fixed weird behavior of signal handlers w.r.t. signal masks and exceptions
raised from the signal handler.
- Fixed bug in the callback*_exn() functions.
Debugger:
- Fixed wrong printing of float record fields and elements of float arrays.
- Supports identifiers starting with '_'.
Profiler:
- Handles .mli files, so ocamlcp can be used to replace ocamlc (e.g. in a
makefile).
- Now works on programs that use stream expressions and stream parsers.
Other libraries:
- Graphics: under X11, treat all mouse buttons equally; fixed problem
with current font reverting to the default font when the graphics
window is resized.
- Str: fixed reentrancy bugs in Str.replace and Str.full_split.
- Bytecode threads: set standard I/O descriptors to non-blocking mode.
- OS threads: revised implementation of Thread.wait_signal.
- All threads: added Event.wrap_abort, Event.choose [].
- Unix.localtime, Unix.gmtime: check for errors.
- Unix.create_process: now supports arbitrary redirections of std descriptors.
- Added Unix.open_process_full.
- Implemented Unix.chmod under Windows.
- Big_int.square_big_int now gives the proper sign to its result.
Others:
- ocamldep: don't stop at first error, skip to next file.
- Emacs mode: updated with Garrigue and Zimmerman's snapshot of 1999/10/18.
- configure script: added -prefix option.
- Windows toplevel application: fixed problem with graphics library
not loading properly.
Objective Caml 2.02:
--------------------
* Type system:
- Check that all components of a signature have unique names.
- Fixed bug in signature matching involving a type component and
a module component, both sharing an abstract type.
- Bug involving recursive classes constrained by a class type fixed.
- Fixed bugs in printing class types and in printing unification errors.
* Compilation:
- Changed compilation scheme for "{r with lbl = e}" when r has many fields
so as to avoid code size explosion.
* Native-code compiler:
- Better constant propagation in boolean expressions and in conditionals.
- Removal of unused arguments during function inlining.
- Eliminated redundant tagging/untagging in bit shifts.
- Static allocation of closures for functions without free variables,
reduces the size of initialization code.
- Revised compilation scheme for definitions at top level of compilation
units, so that top level functions have no free variables.
- Coalesced multiple allocations of heap blocks inside one expression
(e.g. x :: y :: z allocates the two conses in one step).
- Ix86: better handling of large integer constants in instruction selection.
- MIPS: fixed wrong asm generated for String.length "literal".
* Standard library:
- Added the "ignore" primitive function, which just throws away its
argument and returns "()". It allows to write
"ignore(f x); y" if "f x" doesn't have type unit and you don't
want the warning caused by "f x; y".
- Added the "Buffer" module (extensible string buffers).
- Module Format: added formatting to buffers and to strings.
- Added "mem" functions (membership test) to Hashtbl and Map.
- Module List: added find, filter, partition.
Renamed remove and removeq to remove_assoc and remove_assq.
- Module Marshal: fixed bug in marshaling functions when passed functional
values defined by mutual recursion with other functions.
- Module Printf: added Printf.bprintf (print to extensible buffer);
added %i format as synonymous for %d (as per the docs).
- Module Sort: added Sort.array (Quicksort).
* Runtime system:
- New callback functions for callbacks with arbitrary many arguments
and for catching Caml exceptions escaping from a callback.
* The ocamldep dependency generator: now performs full parsing of the
sources, taking into account the scope of module bindings.
* The ocamlyacc parser generator: fixed sentinel error causing wrong
tables to be generated in some cases.
* The str library:
- Added split_delim, full_split as variants of split that control
more precisely what happens to delimiters.
- Added replace_matched for separate matching and replacement operations.
* The graphics library:
- Bypass color lookup for 16 bpp and 32 bpp direct-color displays.
- Larger color cache.
* The thread library:
- Bytecode threads: more clever use of non-blocking I/O, makes I/O
operations faster.
- POSIX threads: gcc-ism removed, should now compile on any ANSI C compiler.
- Both: avoid memory leak in the Event module when a communication
offer is never selected.
* The Unix library:
- Fixed inversion of ctime and mtime in Unix.stat, Unix.fstat, Unix.lstat.
- Unix.establish_connection: properly reclaim socket if connect fails.
* The DBM library: no longer crashes when calling Dbm.close twice.
* Emacs mode:
- Updated with Garrigue and Zimmerman's latest version.
- Now include an "ocamltags" script for using etags on OCaml sources.
* Win32 port:
- Fixed end-of-line bug in ocamlcp causing problems with generated sources.
Objective Caml 2.01:
--------------------
* Typing:
- Added warning for expressions of the form "a; b" where a does not have
type "unit"; catches silly mistake such as
"record.lbl = newval; ..." instead of "record.lbl <- newval; ...".
- Typing bug in "let module" fixed.
* Compilation:
- Fixed bug in compilation of recursive and mutually recursive classes.
- Option -w to turn specific warnings on/off.
- Option -cc to choose the C compiler used with ocamlc -custom and ocamlopt.
* Bytecode compiler and bytecode interpreter:
- Intel x86: removed asm declaration causing "fixed or forbidden register
spilled" error with egcs and gcc 2.8 (but not with gcc 2.7, go figure).
- Revised handling of debugging information, allows faster linking with -g.
* Native-code compiler:
- Fixed bugs in integer constant propagation.
- Out-of-bound accesses in array and strings now raise an Invalid_argument
exception (like the bytecode system) instead of stopping the program.
- Corrected scheduling of bound checks.
- Port to the StrongARM under Linux (e.g. Corel Netwinder).
- I386: fixed bug in profiled code (ocamlopt -p).
- Mips: switched to -n32 model under IRIX; dropped the Ultrix port.
- Sparc: simplified the addressing modes, allows for better scheduling.
- Fixed calling convention bug for Pervasives.modf.
* Toplevel:
- #trace works again.
- ocamlmktop: use matching ocamlc, not any ocamlc from the search path.
* Memory management:
- Fixed bug in heap expansion that could cause the GC to loop.
* C interface:
- New macros CAMLparam... and CAMLlocal... to simplify the handling
of local roots in C code.
- Simplified procedure for allocating and filling Caml blocks from C.
- Declaration of string_length in <caml/mlvalues.h>.
* Standard library:
- Module Format: added {get,set}_all_formatter_output_functions,
formatter_of_out_channel, and the control sequence @<n> in printf.
- Module List: added mem_assoc, mem_assq, remove, removeq.
- Module Pervasives: added float_of_int (synonymous for float),
int_of_float (truncate), int_of_char (Char.code), char_of_int (Char.chr),
bool_of_string.
- Module String: added contains, contains_from, rcontains_from.
* Unix library:
- Unix.lockf: added F_RLOCK, F_TRLOCK; use POSIX locks whenever available.
- Unix.tc{get,set}attr: added non-standard speeds 57600, 115200, 230400.
- Unix.chroot: added.
* Threads:
- Bytecode threads: improved speed of I/O scheduling.
- Native threads: fixed a bug involving signals and exceptions
generated from C.
* The "str" library:
- Added Str.string_partial_match.
- Bumped size of internal stack.
* ocamlyacc: emit correct '# lineno' directive for prelude part of .mly file.
* Emacs editing mode: updated with Jacques Garrigue's newest code.
* Windows port:
- Added support for the "-cclib -lfoo" option (instead of
-cclib /full/path/libfoo.lib as before).
- Threads: fixed a bug at initialization time.
* Macintosh port: source code for Macintosh application merged in.
Objective Caml 2.00:
--------------------
* Language:
- New class language. See http://caml.inria.fr/ocaml/refman/
for a tutorial (chapter 2) and for the reference manual (section 4.9).
- Local module definitions "let module X = <module-expr> in <expr>".
- Record copying with update "{r with lbl1 = expr1; ...}".
- Array patterns "[|pat1; ...;patN|]" in pattern-matchings.
- New reserved keywords: "object", "initializer".
- No longer reserved: "closed", "protected".
* Bytecode compiler:
- Use the same compact memory representations for float arrays, float
records and recursive closures as the native-code compiler.
- More type-dependent optimizations.
- Added the -use_runtime and -make_runtime flags to build separately
and reuse afterwards custom runtime systems
(inspired by Fabrice Le Fessant's patch).
* Native-code compiler:
- Cross-module constant propagation of integer constants.
- More type-dependent optimizations.
- More compact code generated for "let rec" over data structures.
- Better code generated for "for" loops (test at bottom of code).
- More aggressive scheduling of stores.
- Added -p option for time profiling with gprof
(fully supported on Intel x86/Linux and Alpha/Digital Unix only)
(inspired by Aleksey Nogin's patch).
- A case of bad spilling with high register pressure fixed.
- Fixed GC bug when GC called from C without active Caml code.
- Alpha: $gp handling revised to follow Alpha's standard conventions,
allow running "atom" and "pixie" on ocamlopt-generated binaries.
- Intel x86: use movzbl and movsbl systematically to load 8-bit and 16-bit
quantities, no more hacks with partial registers (better for the
Pentium Pro, worse for the Pentium).
- PowerPC: more aggressive scheduling of return address reloading.
- Sparc: scheduling bug related to register pairs fixed.
* Runtime system:
- Better printing of uncaught exceptions (print a fully qualified
name whenever possible).
* New ports:
- Cray T3E (bytecode only) (in collaboration with CEA).
- PowerMac under Rhapsody.
- SparcStations under Linux.
* Standard library:
- Added set_binary_mode_in and set_binary_mode_out in Pervasives
to toggle open channels between text and binary modes.
- output_value and input_value check that the given channel is in
binary mode.
- input_value no longer fails on very large marshalled data (> 16 Mbytes).
- Module Arg: added option Rest.
- Module Filename: temp_file no longer loops if temp dir doesn't exist.
- Module List: added rev_append (tail-rec alternative to @).
- Module Set: tell the truth about "elements" returning a sorted list;
added min_elt, max_elt, singleton.
- Module Sys: added Sys.time for simple measuring of CPU time.
* ocamllex:
- Check for overflow when generating the tables for the automaton.
- Error messages in generated .ml file now point to .mll source.
- Added "let <id> = <regexp>" to name regular expressions
(inspired by Christian Lindig's patch).
* ocamlyacc:
- Better error recovery in presence of EOF tokens.
- Error messages in generated .ml file now point to .mly source.
- Generated .ml file now type-safe even without the generated .mli file.
* The Unix library:
- Use float instead of int to represent Unix times (number of seconds
from the epoch). This fixes a year 2005 problem on 32-bit platforms.
Functions affected: stat, lstat, fstat, time, gmtime, localtime,
mktime, utimes.
- Added putenv.
- Better handling of "unknown" error codes (EUNKNOWNERR).
- Fixed endianness bug in getservbyport.
- win32unix (the Win32 implementation of the Unix library) now has
the same interface as the unix implementation, this allows exchange
of compiled .cmo and .cmi files between Unix and Win32.
* The thread libraries:
- Bytecode threads: bug with escaping exceptions fixed.
- System threads (POSIX, Win32): malloc/free bug fixed; signal bug fixed.
- Both: added Thread.wait_signal to wait synchronously for signals.
* The graph library: bigger color cache.
* The str library: added Str.quote, Str.regexp_string,
Str.regexp_string_case_fold.
* Emacs mode:
- Fixed bug with paragraph fill.
- Fixed bug with next-error under Emacs 20.
Objective Caml 1.07:
--------------------
* Native-code compiler:
- Revised interface between generated code and GC, fixes serious GC
problems with signals and native threads.
- Added "-thread" option for compatibility with ocamlc.
* Debugger: correctly print instance variables of objects.
* Run-time system: ported to OpenBSD.
* Standard library: fixed wrong interface for Marshal.to_buffer and
Obj.unmarshal.
* Num library: added Intel x86 optimized asm code (courtesy of
Bernard Serpette).
* Thread libraries:
- Native threads: fixed GC bugs and installation procedure.
- Bytecode threads: fixed problem with "Marshal" module.
- Both: added Event.always.
* MS Windows port: better handling of long command lines in Sys.command
Objective Caml 1.06:
--------------------
* Language:
- Added two new keywords: "assert" (check assertion) and "lazy"
(delay evaluation).
- Allow identifiers to start with "_" (such identifiers are treated
as lowercase idents).
* Objects:
- Added "protected" methods (visible only from subclasses, can be hidden
in class type declared in module signature).
- Objects can be compared using generic comparison functions.
- Fixed compilation of partial application of object constructors.
* Type system:
- Occur-check now more strict (all recursions must traverse an object).
- A few bugs fixed.
* Run-time system:
- A heap compactor was implemented, so long-running programs can now
fight fragmentation.
- The meaning of the "space_overhead" parameter has changed.
- The macros Push_roots and Pop_roots are superseded by Begin_roots* and
End_roots.
- Bytecode executable includes list of primitives used, avoids crashes
on version mismatch.
- Reduced startup overhead for marshalling, much faster marshalling of
small objects.
- New exception Stack_overflow distinct from Out_of_memory.
- Maximum stack size configurable.
- I/O revised for compatibility with compactor and with native threads.
- All C code ANSIfied (new-style function declarations, etc).
- Threaded code work on all 64-bit processors, not just Alpha/Digital Unix.
- Better printing of uncaught exceptions.
* Both compilers:
- Parsing: more detailed reporting of syntax errors (e.g. shows
unmatched opening parenthesis on missing closing parenthesis).
- Check consistency between interfaces (.cmi).
- Revised rules for determining dependencies between modules.
- Options "-verbose" for printing calls to C compiler, "-noassert"
for turning assertion checks off.
* Native-code compiler:
- Machine-dependent parts rewritten using inheritance instead of
parameterized modules.
- GC bug in value let rec fixed.
- Port to Linux/Alpha.
- Sparc: cleaned up use of %g registers, now compatible with Solaris threads.
* Top-level interactive system:
- Can execute Caml script files given on command line.
- Reads commands from ./.ocamlinit on startup.
- Now thread-compatible.
* Standard library:
- New library module: Lazy (delayed computations).
- New library module: Marshal. Allows marshalling to strings and
transmission of closures between identical programs (SPMD parallelism).
- Filename: "is_absolute" is superseded by "is_implicit" and "is_relative".
To adapt old programs, change "is_absolute x" to "not (is_implicit x)"
(but the new "is_relative" is NOT the opposite of the old "is_absolute").
- Array, Hashtbl, List, Map, Queue, Set, Stack, Stream:
the "iter" functions now take as argument a unit-returning function.
- Format: added "printf" interface to the formatter (see the documentation).
Revised behaviour of simple boxes: no more than one new line is output
when consecutive break hints should lead to multiple line breaks.
- Stream: revised implementation, renamed Parse_failure to Failure and
Parse_error to Error (don't you love gratuitous changes?).
- String: added index, rindex, index_from, rindex_from.
- Array: added mapi, iteri, fold_left, fold_right, init.
- Added Map.map, Set.subset, Printexc.to_string.
* ocamllex: lexers generated by ocamllex can now handle all characters,
including '\000'.
* ocamlyacc: fixed bug with function closures returned by parser rules.
* Debugger:
- Revised generation of events.
- Break on function entrance.
- New commands start/previous.
- The command loadprinter now try to recursively load required
modules.
- Numerous small fixes.
* External libraries:
- systhreads: can now use POSIX threads; POSIX and Win32 threads are
now supported by the native-code compiler.
- dbm and graph: work in native code.
- num: fixed bug in Nat.nat_of_string.
- str: fixed deallocation bug with case folding.
- win32unix: use Win32 handles instead of (buggy) VC++ emulation of Unix
file handles; added gettimeofday.
* Emacs editing mode and debugger interface updated to July '97 version.
Objective Caml 1.05:
--------------------
* Typing: fixed several bugs causing spurious type errors.
* Native-code compiler: fixed instruction selection bug causing GC to
see ill-formed pointers; fixed callbacks to support invocation from a
main program in C.
* Standard library: fixed String.lowercase; Weak now resists integers.
* Toplevel: multiple phrases without intermediate ";;" now really supported;
fixed value printing problems where the wrong printer was selected.
* Debugger: fixed printing problem with local references; revised
handling of checkpoints; various other small fixes.
* Macintosh port: fixed signed division problem in bytecomp/emitcode.ml
Objective Caml 1.04:
--------------------
* Replay debugger ported from Caml Light; added debugger support in
compiler (option -g) and runtime system. Debugger is alpha-quality
and needs testing.
* Parsing:
- Support for "# linenum" directives.
- At toplevel, allow several phrases without intermediate ";;".
* Typing:
- Allow constraints on datatype parameters, e.g.
type 'a foo = ... constraint 'a = 'b * 'c.
- Fixed bug in signature matching in presence of free type variables '_a.
- Extensive cleanup of internals of type inference.
* Native-code compilation:
- Inlining of small functions at point of call (fairly conservative).
- MIPS code generator ported to SGI IRIX 6.
- Better code generated for large integer constants.
- Check for urgent GC when allocating large objects in major heap.
- PowerPC port: better scheduling, reduced TOC consumption.
- HPPA port: handle long conditional branches gracefully,
several span-dependent bugs fixed.
* Standard library:
- More floating-point functions (all ANSI C float functions now available).
- Hashtbl: added functorial interface (allow providing own equality
and hash functions); rehash when resizing, avoid memory leak on
Hashtbl.remove.
- Added Char.uppercase, Char.lowercase, String.uppercase, String.lowercase,
String.capitalize, String.uncapitalize.
- New module Weak for manipulating weak pointers.
- New module Callback for registering closures and exceptions to be
used from C.
* Foreign interface:
- Better support for callbacks (C calling Caml), exception raising
from C, and main() in C. Added function to remove a global root.
- Option -output-obj to package Caml code as a C library.
* Thread library: fixed bug in timed_read and timed_write operations;
Lexing.from_function and Lexing.from_channel now reentrant.
* Unix interface: renamed EACCESS to EACCES (the POSIX name); added setsid;
fixed bug in inet_addr_of_string for 64-bit platforms.
* Ocamlyacc: default error function no longer prevents error recovery.
* Ocamllex: fixed reentrancy problem w.r.t. exceptions during refill;
fixed output problem (\r\r\n) under Win32.
* Macintosh port:
- The makefiles are provided for compiling and installing O'Caml on
a Macintosh with MPW 3.4.1.
- An application with the toplevel in a window is forthcoming.
* Windows NT/95 port: updated toplevel GUI to that of Caml Light 0.73.
* Emacs editing mode and debugger interface included in distribution.
Objective Caml 1.03:
--------------------
* Typing:
- bug with type names escaping their scope via unification with
non-generalized type variables '_a completely fixed;
- fixed bug in occur check : it was too restrictive;
- fixed bug of coercion operators;
- check that no two types of the same name are generated in a module
(there was no check for classes);
- "#install_printer" works again;
- fixed bug in printing of subtyping errors;
- in class interfaces, construct "method m" (without type) change
the status of method m from abstract to concrete;
- in a recursive definition of class interfaces, a class can now
inherit from a previous class;
- typing of a method make use of an eventual previously given type
of this method, yielding clearer type errors.
* Compilation (ocamlc and ocamlopt):
- fixed bug in compilation of classes.
* Native-code compilation:
- optimization of functions taking tuples of arguments;
- code emitter for the Motorola 680x0 processors (retrocomputing week);
- Alpha/OSF1: generate frame descriptors, avoids crashes when e.g.
exp() or log() cause a domain error; fixed bug with
String.length "literal";
- Sparc, Mips, HPPA: removed marking of scanned stack frames
(benefits do not outweight cost).
* Standard library:
- Arg.parse now prints documentation for command-line options;
- I/O buffers (types in_channel and out_channel) now heap-allocated,
avoids crashing when closing a channel several times;
- Overflow bug in compare() fixed;
- GC bug in raising Sys_error from I/O functions fixed;
- Parsing.symbol_start works even for epsilon productions.
* Foreign interface: main() in C now working, fixed bug in library
order at link time.
* Thread library: guard against calling thread functions before Thread.create.
* Unix library: fixed getsockopt, setsockopt, open_process_{in,out}.
* Perl-free, cpp-free, cholesterol-free installation procedure.
Objective Caml 1.02:
--------------------
* Typing:
- fixed bug with type names escaping their scope via unification
with non-generalized type variables '_a;
- keep #class abbreviations longer;
- faster checking of well-formed abbreviation definitions;
- stricter checking of "with" constraints over signatures (arity
mismatch, overriding of an already manifest type).
* Compilation (ocamlc and ocamlopt):
- fixed bug in compilation of recursive classes;
- [|...|] and let...rec... allowed inside definitions of recursive
data structures;
* Bytecode compilation: fixed overflow in linker for programs with
more than 65535 globals and constants.
* Native-code compilation:
- ocamlopt ported to HPPA under HP/UX, Intel x86 under Solaris 2,
PowerMacintosh under MkLinux;
- fixed two bugs related to floating-point arrays (one with "t array"
where t is an abstract type implemented as float, one with
comparison between two float arrays on 32 bit platforms);
- fixed reloading/spilling problem causing non-termination of
register allocation;
- fixed bugs in handling of () causing loss of tail recursion;
- fixed reloading bug in indirect calls.
* Windows NT/95 port:
- complete port of the threads library (Pascal Cuoq);
- partial port of the Unix library (Pascal Cuoq);
- expansion of *, ? and @ on the command line.
* Standard library:
- bug in in List.exists2 fixed;
- bug in "Random.int n" for very large n on 64-bit machines fixed;
- module Format: added a "general purpose" type of box (open_box);
can output on several formatters at the same time.
* The "threads" library:
- implementation on top of native threads available for Win32 and
POSIX 1003.1c;
- added -thread option to select a thread-safe version of the
standard library, the ThreadIO module is no longer needed.
* The "graph" library: avoid invalid pixmaps when doing
open_graph/close_graph several times.
* The "dynlink" library: support for "private" (no re-export) dynamic loading.
* ocamlyacc: skip '...' character literals correctly.
* C interface: C code linked with O'Caml code can provide its own main()
and call caml_main() later.
Objective Caml 1.01:
--------------------
* Typing: better report of type incompatibilities;
non-generalizable type variables in a struct...end no longer flagged
immediately as an error;
name clashes during "open" avoided.
* Fixed bug in output_value where identical data structures
could have different external representations; this bug caused wrong
"inconsistent assumptions" errors when checking compatibility of
interfaces at link-time.
* Standard library: fixed bug in Array.blit on overlapping array sections
* Unmarshaling from strings now working.
* ocamlc, ocamlopt: new flags -intf and -impl to force compilation as
an implementation/an interface, regardless of file extension;
overflow bug on wide-range integer pattern-matchings fixed.
* ocamlc: fixed bytecode generation bug causing problems with compilation
units defining more than 256 values
* ocamlopt, all platforms:
fixed GC bug in "let rec" over data structures;
link startup file first, fixes "undefined symbol" errors with some
libraries.
* ocamlopt, Intel x86:
more efficient calling sequence for calling C functions;
floating-point wars, chapter 5: don't use float stack for holding
float pseudo-registers, stack-allocating them is just as efficient.
* ocamlopt, Alpha and Intel x86: more compact calling sequence for garbage
collection.
* ocamllex: generated automata no longer use callbacks for refilling
the input buffer (works better with threads); character literals
correctly skipped inside actions.
* ocamldep: "-I" directories now searched in the right order
* Thread library: incompatibilities with callbacks, signals, and
dynamic linking removed; scheduling bug with Thread.wait fixed.
* New "dbm" library, interfaces with NDBM.
* Object-oriented extensions:
instance variables can now be omitted in class types;
some error messages have been made clearer;
several bugs fixes.
Objective Caml 1.00:
--------------------
* Merge of Jerome Vouillon and Didier Remy's object-oriented
extensions.
* All libraries: all "new" functions renamed to "create" because "new"
is now a reserved keyword.
* Compilation of "or" patterns (pat1 | pat2) completely revised to
avoid code size explosion.
* Compiler support for preprocessing source files (-pp flag).
* Library construction: flag -linkall to force linking of all units in
a library.
* Native-code compiler: port to the Sparc under NetBSD.
* Toplevel: fixed bug when tracing several times the same function
under different names.
* New format for marshaling arbitrary data structures, allows
marshaling to/from strings.
* Standard library: new module Genlex (configurable lexer for streams)
* Thread library: much better support for I/O and blocking system calls.
* Graphics library: faster reclaimation of unused pixmaps.
* Unix library: new functions {set,clear}_nonblock, {set,clear}_close_on_exec,
{set,get}itimer, inet_addr_any, {get,set}sockopt.
* Dynlink library: added support for linking libraries (.cma files).
Caml Special Light 1.15:
------------------------
* Caml Special Light now runs under Windows NT and 95. Many thanks to
Kevin Gallo (Microsoft Research) who contributed his initial port.
* csllex now generates tables for a table-driven automaton.
The resulting lexers are smaller and run faster.
* Completely automatic configuration script.
* Typing: more stringent checking of module type definitions against
manifest module type specifications.
* Toplevel: recursive definitions of values now working.
* Native-code compiler, all platforms:
toplevel "let"s with refutable patterns now working;
fixed bug in assignment to float record fields;
direct support for floating-point negation and absolute value.
* Native-code compiler, x86: fixed bug with tail calls (with more than
4 arguments) from a function with a one-word stack frame.
* Native-code compiler, Sparc: problem with -compact fixed.
* Thread library: support for non-blocking writes; scheduler revised.
* Unix library: bug in gethostbyaddr fixed; bounds checking for read,
write, etc.
Caml Special Light 1.14:
------------------------
* cslopt ported to the PowerPC/RS6000 architecture. Better support for
AIX in the bytecode system as well.
* cslopt, all platforms: fixed bug in live range splitting around catch/exit.
* cslopt for the Intel (floating-point wars, chapter 4):
implemented Ershov's algorithm to minimize floating-point stack usage;
out-of-order pops fixed.
* Several bug fixes in callbacks and signals.
Caml Special Light 1.13:
------------------------
* Pattern-matching compilation revised to factor out accesses inside
matched structures.
* Callbacks and signals now supported in cslopt.
Signals are only detected at allocation points, though.
Added callback functions with 2 and 3 arguments.
* More explicit error messages when a native-code program aborts due
to array or string bound violations.
* In patterns, "C _" allowed even if the constructor C has several arguments.
* && and || allowed as alternate syntax for & and or.
* cslopt for the Intel: code generation for floating-point
operations entirely redone for the third time (a pox on whomever at
Intel decided to organize the floating-point registers as a stack).
* cslopt for the Sparc: don't use Sparc V8 smul and sdiv instructions,
emulation on V7 processors is abysmal.
Caml Special Light 1.12:
------------------------
* Fixed an embarrassing bug with references to floats.
Caml Special Light 1.11:
------------------------
* Streams and stream parsers a la Caml Light are back (thanks to
Daniel de Rauglaudre).
* User-level concurrent threads, with low-level shared memory primitives
(locks and conditions) as well as channel-based communication primitives
with first-class synchronous events, in the style of Reppy's CML.
* The native-code compiler has been ported to the HP PA-RISC processor
running under NextStep (sorry, no HPUX, its linker keeps dumping
core on me).
* References not captured in a function are optimized into variables.
* Fixed several bugs related to exceptions.
* Floats behave a little more as specified in the IEEE standard
(believe it or not, but x < y is not the negation of x >= y).
* Lower memory consumption for the native-code compiler.
Caml Special Light 1.10:
------------------------
* Many bug fixes (too many to list here).
* Module language: introduction of a "with module" notation over
signatures for concise sharing of all type components of a signature;
better support for concrete types in signatures.
* Native-code compiler: the Intel 386 version has been ported to
NextStep and FreeBSD, and generates better code (especially for
floats)
* Tools and libraries: the Caml Light profiler and library for
arbitrary-precision arithmetic have been ported (thanks to John
Malecki and Victor Manuel Gulias Fernandez); better docs for the Unix
and regexp libraries.
Caml Special Light 1.07:
------------------------
* Syntax: optional ;; allowed in compilation units and structures
(back by popular demand)
* cslopt:
generic handling of float arrays fixed
direct function application when the function expr is not a path fixed
compilation of "let rec" over values fixed
multiple definitions of a value name in a module correctly handled
no calls to ranlib in Solaris
* csltop: #trace now working
* Standard library: added List.memq; documentation of Array fixed.
Caml Special Light 1.06:
------------------------
* First public release.