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A new {line_delimiter, byte()} option allows line-oriented TCP-based protocols
to use a custom line delimiting character. It is to be used in conjunction
with {packet, line}.
This option also works with erlang:decode_packet/3 when its first argument
is 'line'.
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Background
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In record fields with a type declaration but without an initializer, the
Erlang parser inserted automatically the singleton type 'undefined' to
the list of declared types, if that value was not present there.
I.e. the record declaration:
-record(rec, {f1 :: float(),
f2 = 42 :: integer(),
f3 :: some_mod:some_typ()}).
was translated by the parser to:
-record(rec, {f1 :: float() | 'undefined',
f2 = 42 :: integer(),
f3 :: some_mod:some_typ() | 'undefined'}).
The rationale for this was that creation of a "dummy" #rec{} record
should not result in a warning from dialyzer that e.g. the implicit
initialization of the #rec.f1 field violates its type declaration.
Problems
---------
This seemingly innocent action has some unforeseen consequences.
For starters, there is no way for programmers to declare that e.g. only
floats make sense for the f1 field of #rec{} records when there is no
`obvious' default initializer for this field. (This also affects tools
like PropEr that use these declarations produced by the Erlang parser to
generate random instances of records for testing purposes.)
It also means that dialyzer does not warn if e.g. an is_atom/1 test or
something more exotic like an atom_to_list/1 call is performed on the
value of the f1 field.
Similarly, there is no way to extend dialyzer to warn if it finds record
constructions where f1 is not initialized to some float.
Last but not least, it is semantically problematic when the type of the
field is an opaque type: creating a union of an opaque and a structured
type is very problematic for analysis because it fundamentally breaks
the opacity of the term at that point.
Change
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To solve these problems the parser will not automatically insert the
'undefined' value anymore; instead the user has the option to choose the
places where this value makes sense (for the field) and where it does
not and insert the | 'undefined' there manually.
Consequences of this change
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This change means that dialyzer will issue a warning for all places
where records with uninitialized fields are created and those fields have
a declared type that is incompatible with 'undefined' (e.g. float()).
This warning can be suppressed easily by adding | 'undefined' to the
type of this field. This also adds documentation that the user really
intends to create records where this field is uninitialized.
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* sverk/erts/doc-review:
erts: Spell-check erlang.xml
erts: Review newer additions to erlang.xml
erts: Review module erlang docs
erts: Update module erlang docs
erts: Review time correction docs
erts: Update erts time correction docs
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* essen/missing-behavior-absform:
Add missing behavior/behaviours to absform docs
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Trying to adopt same style as done by xsipewe in e17e236cd1661bc
for later additions.
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Rebased 6ac77046b05cd3cb7b117 on OTP-18.1
Conflicts:
erts/doc/src/erlang.xml
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Conflicts:
OTP_VERSION
erts/doc/src/notes.xml
erts/vsn.mk
lib/debugger/doc/src/notes.xml
lib/debugger/vsn.mk
otp_versions.table
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* c-rack/fix-list_to_bitstring-example:
Typos in documentation example of list_to_bitstring/1
OTP-13017
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=== OTP-18.1 ===
Changed Applications:
- compiler-6.0.1
- crypto-3.6.1
- debugger-4.1.1
- dialyzer-2.8.1
- diameter-1.11
- erts-7.1
- eunit-2.2.11
- hipe-3.13
- inets-6.0.1
- kernel-4.1
- mnesia-4.13.1
- odbc-2.11.1
- public_key-1.0.1
- sasl-2.6
- ssh-4.1
- ssl-7.1
- stdlib-2.6
- tools-2.8.1
- wx-1.5
Unchanged Applications:
- asn1-4.0
- common_test-1.11
- cosEvent-2.2
- cosEventDomain-1.2
- cosFileTransfer-1.2
- cosNotification-1.2
- cosProperty-1.2
- cosTime-1.2
- cosTransactions-1.3
- edoc-0.7.17
- eldap-1.2
- erl_docgen-0.4
- erl_interface-3.8
- et-1.5.1
- gs-1.6
- ic-4.4
- jinterface-1.6
- megaco-3.18
- observer-2.1
- orber-3.8
- os_mon-2.4
- ose-1.1
- otp_mibs-1.1
- parsetools-2.1
- percept-0.8.11
- reltool-0.7
- runtime_tools-1.9.1
- snmp-5.2
- syntax_tools-1.7
- test_server-3.9
- typer-0.9.9
- webtool-0.9
- xmerl-1.3.8
Conflicts:
OTP_VERSION
erts/vsn.mk
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Conflicts:
OTP_VERSION
erts/vsn.mk
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* lukas/ose/remove/OTP-12573:
Remove OSE from erl_interface
ose: Remove all code related to the OSE port
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The OSE port is no longer supported and this commit removed it
and any changes related to it. The things that were general
improvements have been left in the code.
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* vinoski/driver-doc-fix/OTP-12855:
Fix documentation of ERL_DRV_ERROR_ERRNO
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OTP-12845
* bruce/change-license:
fix errors caused by changed line numbers
Change license text to APLv2
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* egil/license-compliance/OTP-12848:
Revert "lcnt: Let runq locks reflect actual call location"
Revert "Demote rare debug slogan of message discarding to debug build"
Revert "Add missing error string to syslog logging in epmd"
Revert "Add run queue index to process dump info"
Revert "Add thread index to allocator enomem dump slogan"
Revert "Add number of entries to mnesia copy debug message"
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This reverts commit 345af4a0c8d68b9369c3556fa6d911854c123d3f.
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This reverts commit 5d5f9c1857029d7e8e1de141e29d20dd3de929be.
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* tomas-abrahamsson/patch-1:
Add forgotten argument to example in erl_nif doc
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The parenthesized type with tag 'paren_type' is no longer created by
the Erlang Parser as of OTP 18.0.
The tag 'user_type' is used for user defined types as of OTP 18.0. In
releases before commit 7ad783 'type' is used.
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* rickard/delayed-delete-node/OTP-12802:
Delayed node table GC
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In the documentation for erl_nif, in the map iterator example,
the iterator argument was forgotten in the call to function
enif_map_iterator_create. This is now fixed.
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Thanks to Nathanael Bartley
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* vinoski/enif-raise-exception/OTP-12770:
Add enif_raise_exception
Enhance enif_has_pending_exception
Fix for enif_schedule_nif and exceptions
Conflicts:
erts/doc/src/erl_nif.xml
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* sverk/nif-map-docs:
erts: Cleanup fsummary lines in erl_nif docs
erts: Fix alphabetic order in erl_nif doc
erts: Add docs for map functions in nif API
erts: Rename ErlNifMapIteratorEntry enums
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by removing all full stop.
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