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* ks/dialyzer/undefined_record_fields/OTP-12719:
Update Debugger
Update Diameter
Update Eunit
Update Inets
Update Reltool
Update SSL
Update Test Server
Update Syntax Tools
Update Tools
Update and cleanup HiPE records
Fix errors in dialyzer_{coordinator,worker} specs
Update Dialyzer
Update Compiler
stdlib: Refactor the supervisor module's state
Update Kernel and STDLIB
Take out automatic insertion of 'undefined' from typed record fields
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The update was motivated by commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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A record field type has been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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A record field type has been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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A record field type has been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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The bulk of the changes concerns cleanups and code refactorings concerning
record constructions that assigned 'undefined' to record fields whose type
did not contain this value. See commit 8ce35b2.
While at it, some new type definitions were introduced and type names were
used instead of record type notation. Minor code cleaups were also done.
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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A record field type has been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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Added encode/decode for ecdsa public keys in openssh and rfc4716
format. This is for the ssh public key algorithm ecdsa-sha2-*.
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The field 'dynamics' in #state{} is a union of two opaque types, which
is possibly problematic. Tagging the types should make the code safe
for warnings from future versions of Dialyzer.
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Record field types have been modified due to commit 8ce35b2:
"Take out automatic insertion of 'undefined' from typed record fields".
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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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OTP-12032
* tomszilagyi/shell-support-del-home-end:
Erlang shell: Support keys Del, Home and End
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* bjorn/compiler/fix-crash:
beam_reorder: Eliminate compiler crash
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* maint:
Avoid always updating inet_dns in the primary bootstrap
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* bjorn/kernel/inet_dns/OTP-13027:
Avoid always updating inet_dns in the primary bootstrap
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OTP-13031
* tuncer/leex-leo-liu-result-field-order:
yecc: fix file/2 error tuple doc
leex: fix file/2 error tuple doc (Reported-by: Leo Liu)
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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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Conflicts:
OTP_VERSION
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