Age | Commit message (Collapse) | Author |
|
A bug fix: limited maps end with "...", not "...=>...".
A modification: wW separate pairs with " => ", not "=>".
When the output is limited on number of characters, the term is
balanced by wW the same way as is done with pP (see commit bc38638).
|
|
|
|
The name of the io_lib_pretty:print/2 option 'max_chars' is changed to
'line_max_chars' (used by module shell only).
The new option for limiting the number of returned characters of
io_lib_pretty:print() is called 'chars_limit'.
|
|
* hasse/stdlib/map_guards_shell/OTP-15035/ERL-613:
erts: Correct abstract format doc regarding map creation
stdlib: Correct the linter's check of map guard expressions
|
|
* 'map-get-bif' of git://github.com/michalmuskala/otp:
Introduce map_get guard-safe function
OTP-15037
|
|
The check is used by evaluating modules such as erl_eval.
An example: "if map_size(#{}) =:= 0 -> ok end.".
|
|
* raimo/stdlib/gen_statem-dev/OTP-14015:
Fix after feedback
Improve pointer to User's Guide
Fix after feedback on 'When to use'
Add a 'When to use' section
Fix timeout parsing and doc feedback
Improve doc, change images to .svg
erl_docgen: Implement width in image tag
Update User's Guide and pointers to it
Improve error reasons from state enter call
|
|
Rationale
Today all compound data types except for maps can be deconstructed in guards.
For tuples we have `element/2` and for lists `hd/1` and `tl/1`. Maps are
completely opaque to guards. This means matching on maps can't be
abstracted into macros, which is often done with repetitive guards. It
also means that maps have to be always selected whole from ETS tables,
even when only one field would be enough, which creates a potential
efficiency issue.
This PR introduces an `erlang:map_get/2` guard-safe function that allows
extracting a map field in guard. An alternative to this function would be
to introduce the syntax for extracting a value from a map that was planned
in the original EEP: `Map#{Key}`.
Even outside of guards, since this function is a guard-BIF it is more
efficient than using `maps:get/2` (since it does not need to set up the
stack), and more convenient from pattern matching on the map (compare:
`#{key := Value} = Map, Value` to `map_get(key, Map)`).
Performance considerations
A common concern against adding this function is the notion that "guards
have to be fast" and ideally execute in constant time. While there are
some counterexamples (`length/1`), what is more important is the fact
that adding those functions does not change in any way the time
complexity of pattern matching - it's already possible to match on map
fields today directly in patterns - adding this ability to guards will
niether slow down or speed up the execution, it will only make certain
programs more convenient to write.
This first version is very naive and does not perform any optimizations.
|
|
Those warnings don't make sense any more since erlang:get_stacktrace/0
is now deprecated.
|
|
|
|
|
|
Compile external fun expressions to literals
OTP-15003
|
|
* dgud/revert-string-depr:
Revert "Deprecate old string functions"
|
|
The expressions fun M:F/A, when all elements are literals are also
treated as a literal. Since they have consistent representation and
don't depend on the code currently loaded in the VM, this is safe.
This can provide significant performance improvements in code using such
functions extensively - a full function call to erlang:make_fun/3 is
replaced by a single move instruction and no register shuffling or
saving registers to stack is necessary. Additionally, compound data
types that contain such external functions as elements can be treated as
literals too.
The commit also changes the representation of external funs to be a
valid Erlang syntax and adds support for literal external funs to core
Erlang.
|
|
* raimo/type-posix-0-overhaul/ERL_550/OTP-14019:
Update types for posix error codes
|
|
I have read the man pages for most socket and file operations
on recent Linux, FreeBSD, OpenBSD and Solaris 10 and noted
the possible error codes.
Which error codes that are possible for file operations have
been updated in file:posix/0. Error codes for socket operations
in inet:posix/0. The latter refers to the former so it is
a superset, assuming that e.g sendfile and AF_UNIX socket
operations could cause socket operations to return any file
error code. That is not entirely true, but could be,
especially in the future.
Added to file:posix/0 are:
ebadmsg edeadlk edeadlock eftype emultihop enobufs enolck enolink
enosr enostr enosys eopnotsupp eoverflow erange etxtbsy
Added to inet:posix/0 are all but:
exbadport exbadseq file:posix()
These are still possible according to erl_posix_str.c,
but are not in file:posix/0 nor in inet:posix/0,
and many of them are not file nor inet related, but some might be:
e2big eadv ealign ebade ebadfd ebadr ebadrpc ebadrqc
ebadslt ebfont echild echrng ecomm edirty
edom edotdot eduppkg eidrm einit eisnam
elbin el2hlt el2nsync el3hlt el3rst
elibacc elibbad elibexec elibmax elibscn elnrng
enavail enet enoano enocsi enodata enoexec
enonet enosym enotempty enotnam enotuniq
eproclim eprocunavail eprogmismatch eprogunavail
erefused eremchg eremdev eremote eremoteio
eremoterelease erpcmismatch erremote eshutdown
esrmnt esuccesss etime etoomanyrefs
euclean eunatch eusers eversion exfull
sysnotready vernotsupported ediscon enomore
ecancelled einvalidproctable einvalidprovider eproviderfailedinit
syscallfailure service_not_found type_not_found e_no_more
e_cancelled unknown
|
|
[ERL-557] add is_empty/1 to sets and ordsets
OTP-14996, ERL-557, PR-1703
|
|
It has been decided that it was to early to deprecate the old
string functions.
This partially reverts commit ccb3f7f9768d3c28783c771df47eec1829e51802.
|
|
|
|
* maint:
Updated OTP version
Update release notes
Update version numbers
ssh: Fix bad spec for double_algs() in ssh.hrl
Test event insert from init
Fix init to allow all actions
Conflicts:
OTP_VERSION
|
|
stdlib: Add function lists:search/2
|
|
|
|
|
|
make erlang:process_info/1 not retrieve messages
|
|
|
|
|
|
Allow multiple modifier characters in io:format control sequences
OTP-14971
|
|
This makes it possible to print unicode atoms at the same time as
suppressing detection of printable lists.
|
|
process_info/1 retrieves a number of properties related to a process,
including the list of messages in its mailbox. This is potentially
unsafe if the target process has a large number of queued messages:
- there is no a priori upper bound on the amount of memory being
allocated to hold that list, and
- the loop to retrieve the messages is uninterruptible, so the
Erlang scheduler where this executes blocks for the duration
We've seen process_info/1 bring down heavily loaded nodes on more
than one occasion. At least once it appeared to have blocked the
Erlang heart process from executing, causing the external heart to
kill the VM.
Consequently this removes 'messages' from the list of process_info
tags to retrieve for process_info/1. Note that process_info/1 still
retrieves 'message_queue_len', and process_info/2 can still retrieve
'messages' when asked to.
A few places in the OTP libraries need minor adjustments, since they
want 'message_queue_len' but compute it from the length of the list
of messages.
|
|
This is essentially PR 102, https://github.com/erlang/otp/pull/102.
The OTP Technical Board decided to change the name of the function to
search/2.
|
|
Make io_lib:unscan_format/1 work with pad char and default precision
OTP-14958
|
|
Improve handling of maps. Addendum to b57e890.
|
|
Optimization does not trigger for try-catch.
But send cannot fail here anyway, as Process cannot be an atom.
|
|
as workarounds to avoid blocking auto-connect,
which is now asynchronous in OTP-21.
Also changed old catch to more efficient try-catch.
|
|
as fallback when erlang:monitor failed toward primitive nodes,
which it does not do in OTP-21.
|
|
|
|
* maint:
ERL-558 Add the missing function clause for string:prefix (#1702)
|
|
OTP-14942
|
|
* peterdmv/stdlib/improve_uri_string_api/OTP-14910:
stdlib: Update uri_string documentation (HTML 5.2)
stdlib: Improve URI normalization in uri_string
Change-Id: I1b85e125ae3bc64e04b04ab884ca603217123167
|
|
* john/erts/binary-bin_to_list-performance-fix/OTP-14741:
Replace binary:bin_to_list CIF implementation with binary_to_list
|
|
binary:bin_to_list had a poor implementation that resulted in
excessive garbage collection. binary_to_list is almost identical and
has a generally better implementation, so I've replaced
binary:bin_to_list's CIF with a thin wrapper around binary_to_list.
Granted, binary_to_list has a deprecated indexing scheme, but we're
unlikely to ever remote it entirely and it's somewhat easy to move
it to the 'binary' module later on.
|
|
dialyzer: Compute MD5s using the .beam file (OTP-14937)
|
|
Add ets:whereis/1 for resolving table names -> tid()
|
|
* maint:
stdlib: Correct a minor epp bug
|
|
|
|
|
|
The bug was introduced in 87a0af4 (R18).
|
|
- Original link to HTML 5.0 specification was broken as the
document was moved when later revisions were released.
- Form-urlencoded query string handling conforms to the
HTML 5.2 specification that references WHATWG URL
(10 Jan 2018).
- HTML 5.2 does not specify handling of non-UTF-8
form-urlencoded query strings, but it is still supported
as described in HTML 5.0.
Change-Id: I44603bb501530b16651ecbb9a26ea64e119f83d9
|
|
- normalize/1 accepts uri_map() as input type and can return
error() if URI parsing fails.
- Added normalize/2 that can return a normalized uri_map().
Change-Id: Icdd2e60c15019d3eec2e7bc994cae03066a79194
|
|
* hasse/no_get_stacktrace/OTP-14861:
erts: Update abstract format doc with stacktrace variable
wx: Do not call erlang:get_stacktrace()
tools: Do not call erlang:get_stacktrace()
stdlib: Do not call erlang:get_stacktrace()
sasl: Do not call erlang:get_stacktrace()
runtime_tools: Do not call erlang:get_stacktrace()
reltool: Do not call erlang:get_stacktrace()
parsetools: Do not call erlang:get_stacktrace()
observer: Do not call erlang:get_stacktrace()
mnesia: Do not call erlang:get_stacktrace() (cont)
mnesia: Do not call erlang:get_stacktrace()
kernel: Do not call erlang:get_stacktrace()
inets: Do not call erlang:get_stacktrace()
eunit: Do not call erlang:get_stacktrace()
et: Do not call erlang:get_stacktrace()
dialyzer: Do not call erlang:get_stacktrace()
debugger: Do not call erlang:get_stacktrace()
debugger: Do not try to restore stacktrace
common_test: Do not call erlang:get_stacktrace()
|