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<p>This document describes the changes made to the Dialyzer
application.</p>
+<section><title>Dialyzer 2.7</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p> Dialyzer will no longer emit warnings when inspecting
+ or modifying opaque types within the scope of a module.
+ </p> <p> Hitherto the shape of terms (tuple, list, etc.)
+ has been used to determine the opaque terms, but now the
+ contracts are used for decorating types with opaqueness.
+ </p>
+ <p>
+ Own Id: OTP-10397</p>
+ </item>
+ <item>
+ <p>
+ With <c>--Wunmatched_returns</c>, dialyzer will no longer
+ warn when the value of a list comprehension is ignored,
+ provided that the each value in the list would be an
+ atomic value (such as integer or atoms, as opposed to
+ tuples and lists). Example: ignoring '<c>[io:format(...)
+ || ...]</c>' will not cause a warning, while ignoring
+ '<c>[file:close(Fd) || ...]</c>' will.</p>
+ <p>
+ Own Id: OTP-11626</p>
+ </item>
+ <item>
+ <p>
+ The man page for dialyzer now contains correct
+ information regarding -Wno_behaviours. (Thanks to Steve
+ Vinosky.)</p>
+ <p>
+ Own Id: OTP-11706</p>
+ </item>
+ <item>
+ <p> Fix handling of 'on_load' attribute. (Thanks to
+ Kostis Sagonas.) </p>
+ <p>
+ Own Id: OTP-11743</p>
+ </item>
+ <item>
+ <p>
+ Application upgrade (appup) files are corrected for the
+ following applications: </p>
+ <p>
+ <c>asn1, common_test, compiler, crypto, debugger,
+ dialyzer, edoc, eldap, erl_docgen, et, eunit, gs, hipe,
+ inets, observer, odbc, os_mon, otp_mibs, parsetools,
+ percept, public_key, reltool, runtime_tools, ssh,
+ syntax_tools, test_server, tools, typer, webtool, wx,
+ xmerl</c></p>
+ <p>
+ A new test utility for testing appup files is added to
+ test_server. This is now used by most applications in
+ OTP.</p>
+ <p>
+ (Thanks to Tobias Schlager)</p>
+ <p>
+ Own Id: OTP-11744</p>
+ </item>
+ <item>
+ <p> The generalization of guard constraints has been
+ modified. </p>
+ <p>
+ Own Id: OTP-11798 Aux Id: seq12547 </p>
+ </item>
+ <item>
+ <p> Dialyzer now plays nicely with funs that come as
+ "external" arguments. (Thanks to Stavros Aronis for
+ fixing the bug.) </p>
+ <p>
+ Own Id: OTP-11826</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p> The pre-defined types <c>array/0</c>, <c>dict/0</c>,
+ <c>digraph/0</c>, <c>gb_set/0</c>, <c>gb_tree/0</c>,
+ <c>queue/0</c>, <c>set/0</c>, and <c>tid/0</c> have been
+ deprecated. They will be removed in Erlang/OTP 18.0. </p>
+ <p> Instead the types <c>array:array/0</c>,
+ <c>dict:dict/0</c>, <c>digraph:graph/0</c>,
+ <c>gb_set:set/0</c>, <c>gb_tree:tree/0</c>,
+ <c>queue:queue/0</c>, <c>sets:set/0</c>, and
+ <c>ets:tid/0</c> can be used. (Note: it has always been
+ necessary to use <c>ets:tid/0</c>.) </p> <p> It is
+ allowed in Erlang/OTP 17.0 to locally re-define the types
+ <c>array/0</c>, <c>dict/0</c>, and so on. </p> <p> New
+ types <c>array:array/1</c>, <c>dict:dict/2</c>,
+ <c>gb_sets:set/1</c>, <c>gb_trees:tree/2</c>,
+ <c>queue:queue/1</c>, and <c>sets:set/1</c> have been
+ added. </p> <p> A compiler option,
+ <c>nowarn_deprecated_type</c>, has been introduced. By
+ including the attribute </p> <c>
+ -compile(nowarn_deprecated_type).</c> <p> in an Erlang
+ source file, warnings about deprecated types can be
+ avoided in Erlang/OTP 17.0. </p> <p> The option can also
+ be given as a compiler flag: </p> <c> erlc
+ +nowarn_deprecated_type file.erl</c>
+ <p>
+ Own Id: OTP-10342</p>
+ </item>
+ <item>
+ <p>
+ Removed gs based applications and gs based backends. The
+ <c>observer</c> application replaces the removed
+ applications.</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-10915</p>
+ </item>
+ <item>
+ <p>
+ Forbid unsized fields in patterns of binary generators
+ and simplified v3_core's translation of bit string
+ generators. (Thanks to Anthony Ramine.)</p>
+ <p>
+ Own Id: OTP-11186</p>
+ </item>
+ <item>
+ <p>
+ EEP43: New data type - Maps</p>
+ <p>
+ With Maps you may for instance: <taglist> <item><c>M0 =
+ #{ a =&gt; 1, b =&gt; 2}, % create
+ associations</c></item> <item><c>M1 = M0#{ a := 10 }, %
+ update values</c></item> <item><c>M2 = M1#{ "hi" =&gt;
+ "hello"}, % add new associations</c></item> <item><c>#{
+ "hi" := V1, a := V2, b := V3} = M2. % match keys with
+ values</c></item> </taglist></p>
+ <p>
+ For information on how to use Maps please see the
+ <seealso marker="doc/reference_manual:maps">Reference
+ Manual</seealso>.</p>
+ <p>
+ The current implementation is without the following
+ features: <taglist> <item>No variable keys</item>
+ <item>No single value access</item> <item>No map
+ comprehensions</item> </taglist></p>
+ <p>
+ Note that Maps is <em>experimental</em> during OTP 17.0.</p>
+ <p>
+ Own Id: OTP-11616</p>
+ </item>
+ <item>
+ <p> Parameterized opaque types have been introduced. </p>
+ <p>
+ Own Id: OTP-11625</p>
+ </item>
+ <item>
+ <p>
+ Some function specs are corrected or moved and some edoc
+ comments are corrected in order to allow use of edoc.
+ (Thanks to Pierre Fenoll)</p>
+ <p>
+ Own Id: OTP-11702</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>Dialyzer 2.6.1</title>
<section><title>Fixed Bugs and Malfunctions</title>