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diff --git a/lib/dialyzer/doc/src/dialyzer.xml b/lib/dialyzer/doc/src/dialyzer.xml index 3fd34241b2..4b7eb4ad68 100644 --- a/lib/dialyzer/doc/src/dialyzer.xml +++ b/lib/dialyzer/doc/src/dialyzer.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>2006</year><year>2015</year> + <year>2006</year><year>2016</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -25,341 +25,477 @@ <title>dialyzer</title> <prepared></prepared> <docno></docno> - <date></date> + <date>2016-09-20</date> <rev></rev> + <file>dialyzer.xml</file> </header> <module>dialyzer</module> - <modulesummary>The Dialyzer, a DIscrepancy AnalYZer for ERlang programs</modulesummary> + <modulesummary>Dialyzer, a DIscrepancy AnaLYZer for ERlang programs. + </modulesummary> <description> - <p>The Dialyzer is a static analysis tool that identifies software - discrepancies such as definite type errors, code which has become - dead or unreachable due to some programming error, unnecessary - tests, etc. in single Erlang modules or entire (sets of) - applications. Dialyzer starts its analysis from either - debug-compiled BEAM bytecode or from Erlang source code. The file - and line number of a discrepancy is reported along with an - indication of what the discrepancy is about. Dialyzer bases its - analysis on the concept of success typings which allows for sound - warnings (no false positives).</p> - <p>Read more about Dialyzer and about how to use it from the GUI - in <seealso marker="dialyzer_chapter">Dialyzer User's - Guide</seealso>.</p> + <p>Dialyzer is a static analysis tool that identifies software + discrepancies, such as definite type errors, code that has become dead + or unreachable because of programming error, and unnecessary tests, + in single Erlang modules or entire (sets of) applications.</p> + + <p>Dialyzer starts its analysis from either + debug-compiled BEAM bytecode or from Erlang source code. The file + and line number of a discrepancy is reported along with an + indication of what the discrepancy is about. Dialyzer bases its + analysis on the concept of success typings, which allows for sound + warnings (no false positives).</p> </description> <section> - <title>Using the Dialyzer from the command line</title> - <p>Dialyzer also has a command line version for automated use. Below is a - brief description of the list of its options. The same information can - be obtained by writing</p> - <code type="none"> - dialyzer --help</code> - <p>in a shell. Please refer to the GUI description for more details on - the operation of Dialyzer.</p> - <p>The exit status of the command line version is:</p> + <marker id="command_line"></marker> + <title>Using Dialyzer from the Command Line</title> + <p>Dialyzer has a command-line version for automated use. This + section provides a brief description of the options. The same information + can be obtained by writing the following in a shell:</p> + <code type="none"> - 0 - No problems were encountered during the analysis and no - warnings were emitted. - 1 - Problems were encountered during the analysis. - 2 - No problems were encountered, but warnings were emitted.</code> - <p>Usage:</p> +dialyzer --help</code> + + <p>For more details about the operation of Dialyzer, see section + <seealso marker="dialyzer_chapter#dialyzer_gui"> + Using Dialyzer from the GUI</seealso> in the User's Guide.</p> + + <p><em>Exit status of the command-line version:</em></p> + + <taglist> + <tag><c>0</c></tag> + <item> + <p>No problems were found during the analysis and no warnings were + emitted.</p> + </item> + <tag><c>1</c></tag> + <item> + <p>Problems were found during the analysis.</p> + </item> + <tag><c>2</c></tag> + <item> + <p>No problems were found during the analysis, but warnings were + emitted.</p> + </item> + </taglist> + + <p><em>Usage:</em></p> + <code type="none"> - dialyzer [--help] [--version] [--shell] [--quiet] [--verbose] - [-pa dir]* [--plt plt] [--plts plt*] [-Ddefine]* - [-I include_dir]* [--output_plt file] [-Wwarn]* [--raw] - [--src] [--gui] [files_or_dirs] [-r dirs] - [--apps applications] [-o outfile] - [--build_plt] [--add_to_plt] [--remove_from_plt] - [--check_plt] [--no_check_plt] [--plt_info] [--get_warnings] - [--dump_callgraph file] [--no_native] [--fullpath] - [--statistics] [--no_native_cache]</code> - <p>Options:</p> +dialyzer [--add_to_plt] [--apps applications] [--build_plt] + [--check_plt] [-Ddefine]* [-Dname] [--dump_callgraph file] + [files_or_dirs] [--fullpath] [--get_warnings] [--gui] [--help] + [-I include_dir]* [--no_check_plt] [--no_native] + [--no_native_cache] [-o outfile] [--output_plt file] [-pa dir]* + [--plt plt] [--plt_info] [--plts plt*] [--quiet] [-r dirs] + [--raw] [--remove_from_plt] [--shell] [--src] [--statistics] + [--verbose] [--version] [-Wwarn]*</code> + + <note> + <p>* denotes that multiple occurrences of the option are possible.</p> + </note> + + <p><em>Options:</em></p> + <taglist> - <tag><c><![CDATA[files_or_dirs]]></c> (for backwards compatibility also - as: <c><![CDATA[-c files_or_dirs]]></c>)</tag> - <item>Use Dialyzer from the command line to detect defects in the - specified files or directories containing <c><![CDATA[.erl]]></c> or - <c><![CDATA[.beam]]></c> files, depending on the type of the - analysis.</item> - <tag><c><![CDATA[-r dirs]]></c></tag> - <item>Same as the previous but the specified directories are searched - recursively for subdirectories containing <c><![CDATA[.erl]]></c> or - <c><![CDATA[.beam]]></c> files in them, depending on the type of - analysis.</item> - <tag><c><![CDATA[--apps applications]]></c></tag> - <item>Option typically used when building or modifying a plt as in: + <tag><c>--add_to_plt</c></tag> + <item> + <p>The PLT is extended to also include the files specified with + <c>-c</c> and <c>-r</c>. Use + <c>--plt</c> to specify which PLT to start from, + and <c>--output_plt</c> to specify where to put the PLT. + Notice that the analysis possibly can include files from the PLT if + they depend on the new files. This option only works for BEAM + files.</p> + </item> + <tag><c>--apps applications</c></tag> + <item> + <p>This option is typically used when building or modifying a PLT as + in:</p> <code type="none"> - dialyzer --build_plt --apps erts kernel stdlib mnesia ...</code> - to conveniently refer to library applications corresponding to the - Erlang/OTP installation. However, the option is general and can also - be used during analysis in order to refer to Erlang/OTP applications. - In addition, file or directory names can also be included, as in: +dialyzer --build_plt --apps erts kernel stdlib mnesia ...</code> + <p>to refer conveniently to library applications corresponding to the + Erlang/OTP installation. However, this option is general and can also + be used during analysis to refer to Erlang/OTP applications. + File or directory names can also be included, as in:</p> <code type="none"> - dialyzer --apps inets ssl ./ebin ../other_lib/ebin/my_module.beam</code></item> - <tag><c><![CDATA[-o outfile]]></c> (or - <c><![CDATA[--output outfile]]></c>)</tag> - <item>When using Dialyzer from the command line, send the analysis - results to the specified outfile rather than to stdout.</item> - <tag><c><![CDATA[--raw]]></c></tag> - <item>When using Dialyzer from the command line, output the raw analysis - results (Erlang terms) instead of the formatted result. The raw format - is easier to post-process (for instance, to filter warnings or to - output HTML pages).</item> - <tag><c><![CDATA[--src]]></c></tag> - <item>Override the default, which is to analyze BEAM files, and - analyze starting from Erlang source code instead.</item> - <tag><c><![CDATA[-Dname]]></c> (or <c><![CDATA[-Dname=value]]></c>)</tag> - <item>When analyzing from source, pass the define to Dialyzer. (**)</item> - <tag><c><![CDATA[-I include_dir]]></c></tag> - <item>When analyzing from source, pass the <c><![CDATA[include_dir]]></c> - to Dialyzer. (**)</item> - <tag><c><![CDATA[-pa dir]]></c></tag> - <item>Include <c><![CDATA[dir]]></c> in the path for Erlang (useful when - analyzing files that have <c><![CDATA['-include_lib()']]></c> - directives).</item> - <tag><c><![CDATA[--output_plt file]]></c></tag> - <item>Store the plt at the specified file after building it.</item> - <tag><c><![CDATA[--plt plt]]></c></tag> - <item>Use the specified plt as the initial plt (if the plt was built - during setup the files will be checked for consistency).</item> - <tag><c><![CDATA[--plts plt*]]></c></tag> - <item>Merge the specified plts to create the initial plt -- requires - that the plts are disjoint (i.e., do not have any module - appearing in more than one plt). - The plts are created in the usual way: +dialyzer --apps inets ssl ./ebin ../other_lib/ebin/my_module.beam</code> + </item> + <tag><c>--build_plt</c></tag> + <item> + <p>The analysis starts from an empty PLT and creates a new one from + the files specified with <c>-c</c> and + <c>-r</c>. This option only works for BEAM files. + To override the default PLT location, use + <c>--plt</c> or <c>--output_plt</c>.</p> + </item> + <tag><c>--check_plt</c></tag> + <item> + <p>Check the PLT for consistency and rebuild it if it is not + up-to-date.</p> + </item> + <tag><c>-Dname</c> (or <c>-Dname=value</c>)</tag> + <item> + <p>When analyzing from source, pass the define to Dialyzer. + (**)</p> + </item> + <tag><c>--dump_callgraph file</c></tag> + <item> + <p>Dump the call graph into the specified file whose format is + determined by the filename extension. Supported extensions are: + <c>raw</c>, <c>dot</c>, and <c>ps</c>. If something else is used as + filename extension, default format <c>.raw</c> is used.</p> + </item> + <tag><c>files_or_dirs</c> (for backward compatibility also + as <c>-c files_or_dirs</c>)</tag> + <item> + <p>Use Dialyzer from the command line to detect defects in the + specified files or directories containing <c>.erl</c> or + <c>.beam</c> files, depending on the type of the + analysis.</p> + </item> + <tag><c>--fullpath</c></tag> + <item> + <p>Display the full path names of files for which warnings are + emitted.</p> + </item> + <tag><c>--get_warnings</c></tag> + <item> + <p>Make Dialyzer emit warnings even when manipulating the PLT. + Warnings are only emitted for files that are analyzed.</p> + </item> + <tag><c>--gui</c></tag> + <item> + <p>Use the GUI.</p></item> + <tag><c>--help</c> (or <c>-h</c>)</tag> + <item> + <p>Print this message and exit.</p> + </item> + <tag><c>-I include_dir</c></tag> + <item> + <p>When analyzing from source, pass the <c>include_dir</c> + to Dialyzer. (**)</p> + </item> + <tag><c>--no_check_plt</c></tag> + <item> + <p>Skip the PLT check when running Dialyzer. This is useful when + working with installed PLTs that never change.</p> + </item> + <tag><c>--no_native</c> (or <c>-nn</c>)</tag> + <item> + <p>Bypass the native code compilation of some key files that + Dialyzer heuristically performs when dialyzing many files. + This avoids the compilation time, but can result in (much) longer + analysis time.</p> + </item> + <tag><c>--no_native_cache</c></tag> + <item> + <p>By default, Dialyzer caches the results of native compilation + in directory <c>$XDG_CACHE_HOME/erlang/dialyzer_hipe_cache</c>. + <c>XDG_CACHE_HOME</c> defaults to <c>$HOME/.cache</c>. + Use this option to disable caching.</p> + </item> + <tag><c>-o outfile</c> (or + <c>--output outfile</c>)</tag> + <item> + <p>When using Dialyzer from the command line, send the analysis + results to the specified outfile rather than to <c>stdout</c>.</p> + </item> + <tag><c>--output_plt file</c></tag> + <item> + <p>Store the PLT at the specified file after building it.</p> + </item> + <tag><c>-pa dir</c></tag> + <item> + <p>Include <c>dir</c> in the path for Erlang. This is useful + when analyzing files that have <c>-include_lib()</c> + directives.</p> + </item> + <tag><c>--plt plt</c></tag> + <item> + <p>Use the specified PLT as the initial PLT. If the PLT was built + during setup, the files are checked for consistency.</p> + </item> + <tag><c>--plt_info</c></tag> + <item> + <p>Make Dialyzer print information about the PLT and then quit. + The PLT can be specified with <c>--plt(s)</c>.</p> + </item> + <tag><c>--plts plt*</c></tag> + <item> + <p>Merge the specified PLTs to create the initial PLT. This requires + that the PLTs are disjoint (that is, do not have any module + appearing in more than one PLT). + The PLTs are created in the usual way:</p> <code type="none"> - dialyzer --build_plt --output_plt plt_1 files_to_include - ... - dialyzer --build_plt --output_plt plt_n files_to_include</code> - and then can be used in either of the following ways: +dialyzer --build_plt --output_plt plt_1 files_to_include +... +dialyzer --build_plt --output_plt plt_n files_to_include</code> + <p>They can then be used in either of the following ways:</p> <code type="none"> - dialyzer files_to_analyze --plts plt_1 ... plt_n</code> - or: +dialyzer files_to_analyze --plts plt_1 ... plt_n</code> + <p>or</p> <code type="none"> - dialyzer --plts plt_1 ... plt_n -- files_to_analyze</code> - (Note the -- delimiter in the second case)</item> - <tag><c><![CDATA[-Wwarn]]></c></tag> - <item>A family of options which selectively turn on/off warnings - (for help on the names of warnings use - <c><![CDATA[dialyzer -Whelp]]></c>). - Note that the options can also be given in the file with a - <c>-dialyzer()</c> attribute. See <seealso - marker="#suppression">Requesting or Suppressing Warnings in - Source Files</seealso> below for details.</item> - <tag><c><![CDATA[--shell]]></c></tag> - <item>Do not disable the Erlang shell while running the GUI.</item> - <tag><c><![CDATA[--version]]></c> (or <c><![CDATA[-v]]></c>)</tag> - <item>Print the Dialyzer version and some more information and - exit.</item> - <tag><c><![CDATA[--help]]></c> (or <c><![CDATA[-h]]></c>)</tag> - <item>Print this message and exit.</item> - <tag><c><![CDATA[--quiet]]></c> (or <c><![CDATA[-q]]></c>)</tag> - <item>Make Dialyzer a bit more quiet.</item> - <tag><c><![CDATA[--verbose]]></c></tag> - <item>Make Dialyzer a bit more verbose.</item> - <tag><c><![CDATA[--statistics]]></c></tag> - <item>Prints information about the progress of execution (analysis phases, - time spent in each and size of the relative input).</item> - <tag><c><![CDATA[--build_plt]]></c></tag> - <item>The analysis starts from an empty plt and creates a new one from - the files specified with <c><![CDATA[-c]]></c> and - <c><![CDATA[-r]]></c>. Only works for beam files. Use - <c><![CDATA[--plt]]></c> or <c><![CDATA[--output_plt]]></c> to - override the default plt location.</item> - <tag><c><![CDATA[--add_to_plt]]></c></tag> - <item>The plt is extended to also include the files specified with - <c><![CDATA[-c]]></c> and <c><![CDATA[-r]]></c>. Use - <c><![CDATA[--plt]]></c> to specify which plt to start from, - and <c><![CDATA[--output_plt]]></c> to specify where to put the plt. - Note that the analysis might include files from the plt if they depend - on the new files. This option only works with beam files.</item> - <tag><c><![CDATA[--remove_from_plt]]></c></tag> - <item>The information from the files specified with - <c><![CDATA[-c]]></c> and <c><![CDATA[-r]]></c> is removed - from the plt. Note that this may cause a re-analysis of the remaining - dependent files.</item> - <tag><c><![CDATA[--check_plt]]></c></tag> - <item>Check the plt for consistency and rebuild it if it is not - up-to-date.</item> - <tag><c><![CDATA[--no_check_plt]]></c></tag> - <item>Skip the plt check when running Dialyzer. Useful when working with - installed plts that never change.</item> - <tag><c><![CDATA[--plt_info]]></c></tag> - <item>Make Dialyzer print information about the plt and then quit. The - plt can be specified with <c><![CDATA[--plt(s)]]></c>.</item> - <tag><c><![CDATA[--get_warnings]]></c></tag> - <item>Make Dialyzer emit warnings even when manipulating the plt. - Warnings are only emitted for files that are actually analyzed.</item> - <tag><c><![CDATA[--dump_callgraph file]]></c></tag> - <item>Dump the call graph into the specified file whose format is - determined by the file name extension. Supported extensions are: raw, - dot, and ps. If something else is used as file name extension, default - format '.raw' will be used.</item> - <tag><c><![CDATA[--no_native]]></c> (or <c><![CDATA[-nn]]></c>)</tag> - <item>Bypass the native code compilation of some key files that Dialyzer - heuristically performs when dialyzing many files; this avoids the - compilation time but it may result in (much) longer analysis - time.</item> - <tag><c><![CDATA[--no_native_cache]]></c></tag> - <item>By default, Dialyzer caches the results of native compilation in the - <c>$XDG_CACHE_HOME/erlang/dialyzer_hipe_cache</c> directory. - <c>XDG_CACHE_HOME</c> defaults to <c>$HOME/.cache</c>. - Use this option to disable caching.</item> - <tag><c><![CDATA[--fullpath]]></c></tag> - <item>Display the full path names of files for which warnings are emitted.</item> - <tag><c><![CDATA[--gui]]></c></tag> - <item>Use the GUI.</item> +dialyzer --plts plt_1 ... plt_n -- files_to_analyze</code> + <p>Notice the <c>--</c> delimiter in the second case.</p> + </item> + <tag><c>--quiet</c> (or <c>-q</c>)</tag> + <item> + <p>Make Dialyzer a bit more quiet.</p> + </item> + <tag><c>-r dirs</c></tag> + <item> + <p>Same as <c>files_or_dirs</c>, but the specified + directories are searched + recursively for subdirectories containing <c>.erl</c> or + <c>.beam</c> files in them, depending on the type of + analysis.</p> + </item> + <tag><c>--raw</c></tag> + <item> + <p>When using Dialyzer from the command line, output the raw + analysis results (Erlang terms) instead of the formatted result. + The raw format + is easier to post-process (for example, to filter warnings or to + output HTML pages).</p> + </item> + <tag><c>--remove_from_plt</c></tag> + <item> + <p>The information from the files specified with + <c>-c</c> and <c>-r</c> is removed from + the PLT. Notice that this can cause a reanalysis of the remaining + dependent files.</p> + </item> + <tag><c>--shell</c></tag> + <item> + <p>Do not disable the Erlang shell while running the GUI.</p> + </item> + <tag><c>--src</c></tag> + <item> + <p>Override the default, which is to analyze BEAM files, and + analyze starting from Erlang source code instead.</p> + </item> + <tag><c>--statistics</c></tag> + <item> + <p>Print information about the progress of execution (analysis phases, + time spent in each, and size of the relative input).</p> + </item> + <tag><c>--verbose</c></tag> + <item> + <p>Make Dialyzer a bit more verbose.</p> + </item> + <tag><c>--version</c> (or <c>-v</c>)</tag> + <item> + <p>Print the Dialyzer version and some more information and + exit.</p> + </item> + <tag><c>-Wwarn</c></tag> + <item> + <p>A family of options that selectively turn on/off warnings. + (For help on the names of warnings, use + <c>dialyzer -Whelp</c>.) + Notice that the options can also be specified in the file with a + <c>-dialyzer()</c> attribute. For details, see section <seealso + marker="#suppression">Requesting or Suppressing Warnings in + Source Files</seealso>.</p> + </item> </taglist> + <note> - <p>* denotes that multiple occurrences of these options are possible.</p> - <p>** options <c><![CDATA[-D]]></c> and <c><![CDATA[-I]]></c> work both from command-line and in the Dialyzer GUI; - the syntax of defines and includes is the same as that used by <c><![CDATA[erlc]]></c>.</p> + <p>** options <c>-D</c> and <c>-I</c> work both + from the command line and in the Dialyzer GUI; the syntax of + defines and includes is the same as that used by + <seealso marker="erts:erlc">erlc(1)</seealso>.</p> </note> - <p>Warning options:</p> + + <p><em>Warning options:</em></p> + <taglist> - <tag><c><![CDATA[-Wno_return]]></c></tag> - <item>Suppress warnings for functions that will never return a - value.</item> - <tag><c><![CDATA[-Wno_unused]]></c></tag> - <item>Suppress warnings for unused functions.</item> - <tag><c><![CDATA[-Wno_improper_lists]]></c></tag> - <item>Suppress warnings for construction of improper lists.</item> - <tag><c><![CDATA[-Wno_fun_app]]></c></tag> - <item>Suppress warnings for fun applications that will fail.</item> - <tag><c><![CDATA[-Wno_match]]></c></tag> - <item>Suppress warnings for patterns that are unused or cannot - match.</item> - <tag><c><![CDATA[-Wno_opaque]]></c></tag> - <item>Suppress warnings for violations of opaqueness of data types.</item> - <tag><c><![CDATA[-Wno_fail_call]]></c></tag> - <item>Suppress warnings for failing calls.</item> - <tag><c><![CDATA[-Wno_contracts]]></c></tag> - <item>Suppress warnings about invalid contracts.</item> - <tag><c><![CDATA[-Wno_behaviours]]></c></tag> - <item>Suppress warnings about behaviour callbacks which drift from the - published recommended interfaces.</item> - <tag><c><![CDATA[-Wno_missing_calls]]></c></tag> - <item>Suppress warnings about calls to missing functions.</item> - <tag><c><![CDATA[-Wno_undefined_callbacks]]></c></tag> - <item>Suppress warnings about behaviours that have no - <c>-callback</c> attributes for their callbacks.</item> - <tag><c><![CDATA[-Wunmatched_returns]]></c>***</tag> - <item>Include warnings for function calls which ignore a structured return - value or do not match against one of many possible return - value(s).</item> - <tag><c><![CDATA[-Werror_handling]]></c>***</tag> - <item>Include warnings for functions that only return by means of an - exception.</item> - <tag><c><![CDATA[-Wrace_conditions]]></c>***</tag> - <item>Include warnings for possible race conditions. Note that the - analysis that finds data races performs intra-procedural data flow analysis - and can sometimes explode in time. Enable it at your own risk. - </item> -i <tag><c><![CDATA[-Wunderspecs]]></c>***</tag> - <item>Warn about underspecified functions - (the -spec is strictly more allowing than the success typing).</item> - <tag><c><![CDATA[-Wunknown]]></c>***</tag> - <item>Let warnings about unknown functions and types affect the - exit status of the command line version. The default is to ignore - warnings about unknown functions and types when setting the exit - status. When using the Dialyzer from Erlang, warnings about unknown - functions and types are returned; the default is not to return - these warnings.</item> + <tag><c>-Werror_handling</c> (***)</tag> + <item> + <p>Include warnings for functions that only return by an exception.</p> + </item> + <tag><c>-Wno_behaviours</c></tag> + <item> + <p>Suppress warnings about behavior callbacks that drift from the + published recommended interfaces.</p> + </item> + <tag><c>-Wno_contracts</c></tag> + <item> + <p>Suppress warnings about invalid contracts.</p> + </item> + <tag><c>-Wno_fail_call</c></tag> + <item> + <p>Suppress warnings for failing calls.</p> + </item> + <tag><c>-Wno_fun_app</c></tag> + <item> + <p>Suppress warnings for fun applications that will fail.</p> + </item> + <tag><c>-Wno_improper_lists</c></tag> + <item> + <p>Suppress warnings for construction of improper lists.</p> + </item> + <tag><c>-Wno_match</c></tag> + <item> + <p>Suppress warnings for patterns that are unused or cannot match.</p> + </item> + <tag><c>-Wno_missing_calls</c></tag> + <item> + <p>Suppress warnings about calls to missing functions.</p> + </item> + <tag><c>-Wno_opaque</c></tag> + <item> + <p>Suppress warnings for violations of opacity of data types.</p> + </item> + <tag><c>-Wno_return</c></tag> + <item> + <p>Suppress warnings for functions that will never return a value.</p> + </item> + <tag><c>-Wno_undefined_callbacks</c></tag> + <item> + <p>Suppress warnings about behaviors that have no + <c>-callback</c> attributes for their callbacks.</p> + </item> + <tag><c>-Wno_unused</c></tag> + <item> + <p>Suppress warnings for unused functions.</p> + </item> + <tag><c>-Wrace_conditions</c> (***)</tag> + <item> + <p>Include warnings for possible race conditions. Notice that the + analysis that finds data races performs intra-procedural data flow + analysis and can sometimes explode in time. Enable it at your own + risk.</p> + </item> + <tag><c>-Wunderspecs</c> (***)</tag> + <item> + <p>Warn about underspecified functions (the specification is strictly + more allowing than the success typing).</p> + </item> + <tag><c>-Wunknown</c> (***)</tag> + <item> + <p>Let warnings about unknown functions and types affect the + exit status of the command-line version. The default is to ignore + warnings about unknown functions and types when setting the exit + status. When using Dialyzer from Erlang, warnings about unknown + functions and types are returned; the default is not to return + these warnings.</p> + </item> + <tag><c>-Wunmatched_returns</c> (***)</tag> + <item> + <p>Include warnings for function calls that ignore a structured return + value or do not match against one of many possible return + value(s).</p> + </item> </taglist> - <p>The following options are also available but their use is not - recommended: (they are mostly for Dialyzer developers and internal - debugging)</p> + + <p>The following options are also available, but their use is not + recommended (they are mostly for Dialyzer developers and internal + debugging):</p> + <taglist> - <tag><c><![CDATA[-Woverspecs]]></c>***</tag> - <item>Warn about overspecified functions - (the -spec is strictly less allowing than the success typing).</item> - <tag><c><![CDATA[-Wspecdiffs]]></c>***</tag> - <item>Warn when the -spec is different than the success typing.</item> + <tag><c>-Woverspecs</c> (***)</tag> + <item> + <p>Warn about overspecified functions (the specification is strictly + less allowing than the success typing).</p> + </item> + <tag><c>-Wspecdiffs</c> (***)</tag> + <item> + <p>Warn when the specification is different than the success typing.</p> + </item> </taglist> + <note> - <p>*** Identifies options that turn on warnings rather than - turning them off.</p> + <p>*** denotes options that turn on warnings rather than + turning them off.</p> </note> </section> <section> - <title>Using the Dialyzer from Erlang</title> - <p>You can also use Dialyzer directly from Erlang. Both the GUI and the - command line versions are available. The options are similar to the ones - given from the command line, so please refer to the sections above for - a description of these.</p> + <title>Using Dialyzer from Erlang</title> + <p>Dialyzer can be used directly from Erlang. Both the GUI and the + command-line versions are also available. The options are similar to the + ones given from the command line, see section + <seealso marker="#command_line"> + Using Dialyzer from the Command Line</seealso>.</p> </section> <section> <marker id="suppression"></marker> <title>Requesting or Suppressing Warnings in Source Files</title> - <p> - The <c>-dialyzer()</c> attribute can be used for turning off + <p>Attribute <c>-dialyzer()</c> can be used for turning off warnings in a module by specifying functions or warning options. For example, to turn off all warnings for the function - <c>f/0</c>, include the following line: - </p> -<code type="none"> --dialyzer({nowarn_function, f/0}). -</code> + <c>f/0</c>, include the following line:</p> + + <code type="none"> +-dialyzer({nowarn_function, f/0}).</code> + <p>To turn off warnings for improper lists, add the following line - to the source file: - </p> -<code type="none"> --dialyzer(no_improper_lists). -</code> - <p>The <c>-dialyzer()</c> attribute is allowed after function - declarations. Lists of warning options or functions are allowed: - </p> -<code type="none"> --dialyzer([{nowarn_function, [f/0]}, no_improper_lists]). -</code> - <p> - Warning options can be restricted to functions: - </p> -<code type="none"> --dialyzer({no_improper_lists, g/0}). -</code> -<code type="none"> --dialyzer({[no_return, no_match], [g/0, h/0]}). -</code> - <p> - For help on the warning options use <c>dialyzer -Whelp</c>. The - options are also enumerated <seealso - marker="#gui/1">below</seealso> (<c>WarnOpts</c>). - </p> + to the source file:</p> + + <code type="none"> +-dialyzer(no_improper_lists).</code> + + <p>Attribute <c>-dialyzer()</c> is allowed after function + declarations. Lists of warning options or functions are allowed:</p> + + <code type="none"> +-dialyzer([{nowarn_function, [f/0]}, no_improper_lists]).</code> + + <p>Warning options can be restricted to functions:</p> + + <code type="none"> +-dialyzer({no_improper_lists, g/0}).</code> + + <code type="none"> +-dialyzer({[no_return, no_match], [g/0, h/0]}).</code> + + <p>For help on the warning options, use <c>dialyzer -Whelp</c>. The + options are also enumerated, see function <seealso marker="#gui/1"> + <c>gui/1</c></seealso> below (<c>WarnOpts</c>).</p> + <note> - <p> - The <c>-dialyzer()</c> attribute is not checked by the Erlang - Compiler, but by the Dialyzer itself. - </p> + <p>Attribute <c>-dialyzer()</c> is not checked by the Erlang + compiler, but by Dialyzer itself.</p> </note> + <note> - <p> - The warning option <c>-Wrace_conditions</c> has no effect when - set in source files. - </p> + <p>Warning option <c>-Wrace_conditions</c> has no effect when + set in source files.</p> </note> - <p> - The <c>-dialyzer()</c> attribute can also be used for turning on - warnings. For instance, if a module has been fixed regarding - unmatched returns, adding the line - </p> -<code type="none"> --dialyzer(unmatched_returns). -</code> - <p> - can help in assuring that no new unmatched return warnings are - introduced. - </p> + + <p>Attribute <c>-dialyzer()</c> can also be used for turning on + warnings. For example, if a module has been fixed regarding + unmatched returns, adding the following line can help in assuring + that no new unmatched return warnings are introduced:</p> + + <code type="none"> +-dialyzer(unmatched_returns).</code> </section> <funcs> <func> + <name>format_warning(Msg) -> string()</name> + <fsummary>Get the string version of a warning message.</fsummary> + <type> + <v>Msg = {Tag, Id, msg()}</v> + <d>See <c>run/1</c>.</d> + </type> + <desc> + <p>Get a string from warnings as returned by + <seealso marker="#run/1"><c>run/1</c></seealso>.</p> + </desc> + </func> + + <func> <name>gui() -> ok | {error, Msg}</name> <name>gui(OptList) -> ok | {error, Msg}</name> - <fsummary>Dialyzer GUI version</fsummary> + <fsummary>Dialyzer GUI version.</fsummary> <type> - <v>OptList -- see below</v> + <v>OptList</v> + <d>See below.</d> </type> <desc> <p>Dialyzer GUI version.</p> @@ -368,9 +504,12 @@ OptList :: [Option] Option :: {files, [Filename :: string()]} | {files_rec, [DirName :: string()]} | {defines, [{Macro :: atom(), Value :: term()}]} - | {from, src_code | byte_code} %% Defaults to byte_code - | {init_plt, FileName :: string()} %% If changed from default - | {plts, [FileName :: string()]} %% If changed from default + | {from, src_code | byte_code} + %% Defaults to byte_code + | {init_plt, FileName :: string()} + %% If changed from default + | {plts, [FileName :: string()]} + %% If changed from default | {include_dirs, [DirName :: string()]} | {output_file, FileName :: string()} | {output_plt, FileName :: string()} @@ -383,76 +522,71 @@ Option :: {files, [Filename :: string()]} | {warnings, [WarnOpts]} | {get_warnings, bool()} -WarnOpts :: no_return - | no_unused - | no_improper_lists +WarnOpts :: error_handling + | no_behaviours + | no_contracts + | no_fail_call | no_fun_app + | no_improper_lists | no_match + | no_missing_calls | no_opaque - | no_fail_call - | no_contracts - | no_behaviours + | no_return | no_undefined_callbacks - | unmatched_returns - | error_handling + | no_unused | race_conditions - | overspecs | underspecs - | specdiffs - | unknown</code> + | unknown + | unmatched_returns + | overspecs + | specdiffs</code> </desc> </func> + <func> - <name>run(OptList) -> Warnings</name> - <fsummary>Dialyzer command line version</fsummary> - <type> - <v>OptList -- see gui/0,1</v> - <v>Warnings -- see below </v> - </type> + <name>plt_info(string()) -> {'ok', [{atom(), any()}]} | {'error', atom()}</name> + <fsummary>Return information about the specified PLT.</fsummary> <desc> - <p>Dialyzer command line version.</p> - <code type="none"> -Warnings :: [{Tag, Id, Msg}] -Tag :: 'warn_behaviour' - | 'warn_bin_construction' - | 'warn_callgraph' - | 'warn_contract_not_equal' - | 'warn_contract_range' - | 'warn_contract_subtype' - | 'warn_contract_supertype' - | 'warn_contract_syntax' - | 'warn_contract_types' - | 'warn_failing_call' - | 'warn_fun_app' - | 'warn_matching' - | 'warn_non_proper_list' - | 'warn_not_called' - | 'warn_opaque' - | 'warn_race_condition' - | 'warn_return_no_exit' - | 'warn_return_only_exit' - | 'warn_umatched_return' - | 'warn_undefined_callbacks' - | 'warn_unknown' -Id = {File :: string(), Line :: integer()} -Msg = msg() -- Undefined</code> + <p>Returns information about the specified PLT.</p> </desc> </func> + <func> - <name>format_warning(Msg) -> string()</name> - <fsummary>Get the string version of a warning message.</fsummary> + <name>run(OptList) -> Warnings</name> + <fsummary>Dialyzer command-line version.</fsummary> <type> - <v>Msg = {Tag, Id, msg()} -- See run/1</v> + <v>OptList</v> + <d>See <c>gui/0,1</c>.</d> + <v>Warnings</v> + <d>See below.</d> </type> <desc> - <p>Get a string from warnings as returned by dialyzer:run/1.</p> - </desc> - </func> - <func> - <name>plt_info(string()) -> {'ok', [{atom(), any()}]} | {'error', atom()}</name> - <fsummary>Returns information about the specified plt.</fsummary> - <desc> - <p>Returns information about the specified plt.</p> + <p>Dialyzer command-line version.</p> + <code type="none"> +Warnings :: [{Tag, Id, Msg}] +Tag :: 'warn_behaviour' + | 'warn_bin_construction' + | 'warn_callgraph' + | 'warn_contract_not_equal' + | 'warn_contract_range' + | 'warn_contract_subtype' + | 'warn_contract_supertype' + | 'warn_contract_syntax' + | 'warn_contract_types' + | 'warn_failing_call' + | 'warn_fun_app' + | 'warn_matching' + | 'warn_non_proper_list' + | 'warn_not_called' + | 'warn_opaque' + | 'warn_race_condition' + | 'warn_return_no_exit' + | 'warn_return_only_exit' + | 'warn_umatched_return' + | 'warn_undefined_callbacks' + | 'warn_unknown' +Id = {File :: string(), Line :: integer()} +Msg = msg() -- Undefined</code> </desc> </func> </funcs> |