Merge branch 'mc/dialyzer-doc' into dev

* mc/dialyzer-doc:
  dialyzer: Update documentation

lib/dialyzer/RELEASE_NOTES

@@ -3,8 +3,13 @@
 		(in reversed chronological order)
 ==============================================================================
 
-Version 2.x.x (in Erlang/OTP R14B01)
+Version 2.4.0 (in Erlang/OTP R14B01)
 ------------------------------------
+ - Added ability to supply multiple PLTs for the analysis (option --plts).
+   Currently these PLTs must be independent (i.e., no module appears in more
+   than one PLT) and there must not include files with module name clashes.
+ - Strengthened and streamlined hard-coded type information for some BIFs
+   and key library functions.
  - Fixed pretty rare infinite loop when refining the types of an SCC whose
    functions all returned none() (thanks to Stavros Aronis).
  - Fixed pretty rare crash when taking the infimum of two tuple_sets.

lib/dialyzer/doc/manual.txt

@@ -123,9 +123,9 @@ The exit status of the command line version is:
 
 
 Usage: dialyzer [--help] [--version] [--shell] [--quiet] [--verbose]
-		[-pa dir]* [--plt plt] [--plts plts] [-Ddefine]*
+		[-pa dir]* [--plt plt] [--plts plt*] [-Ddefine]*
                 [-I include_dir]* [--output_plt file] [-Wwarn]*
-                [--src]  [--gui | --wx] [files_or_dirs] [-r dirs]
+                [--src] [--gui | --wx] [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]
@@ -135,63 +135,75 @@ Options:
    files_or_dirs (for backwards compatibility also as: -c files_or_dirs)
        Use Dialyzer from the command line to detect defects in the
        specified files or directories containing .erl or .beam files,
-       depending on the type of the analysis
+       depending on the type of the analysis.
    -r dirs
        Same as the previous but the specified directories are searched
        recursively for subdirectories containing .erl or .beam files in
-       them, depending on the type of analysis
+       them, depending on the type of analysis.
    --apps applications
-       Option typically used when building or modifying PLT as in:
+       Option typically used when building or modifying a plt as in:
          dialyzer --build_plt --apps erts kernel stdlib mnesia ...
        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 --apps inets ssl ./ebin ../other_lib/ebin/my_module.beam
+   -o outfile (or --output outfile)
+       When using Dialyzer from the command line, send the analysis
+       results to the specified outfile rather than to stdout.
    --raw
        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)
+       warnings or to output HTML pages).
    --src
-       Override the default, which is to analyze BEAM bytecode, and
-       analyze starting from Erlang source code instead
+       Override the default, which is to analyze BEAM files, and
+       analyze starting from Erlang source code instead.
    -Dname (or -Dname=value)
-       When analyzing from source, pass the define to Dialyzer (**)
+       When analyzing from source, pass the define to Dialyzer. (**)
    -I include_dir
-       When analyzing from source, pass the include_dir to Dialyzer (**)
+       When analyzing from source, pass the include_dir to Dialyzer. (**)
    -pa dir
        Include dir in the path for Erlang (useful when analyzing files
-       that have '-include_lib()' directives)
+       that have '-include_lib()' directives).
    --output_plt file
-       Store the plt at the specified file after building it
+       Store the plt at the specified file after building it.
    --plt plt
        Use the specified plt as the initial plt (if the plt was built 
-       during setup the files will be checked for consistency)
-   --plts plts
-       Merges 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)
+       during setup the files will be checked for consistency).
+   --plts plt*
+      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 --build_plt --output_plt plt_1 files_to_include
+        ...
+        dialyzer --build_plt --output_plt plt_n files_to_include
+      and then can be used in either of the following ways:
+        dialyzer files_to_analyze --plts plt_1 ... plt_n
+      or:
+        dialyzer --plts plt_1 ... plt_n -- files_to_analyze
+      (Note the -- delimiter in the second case)
    -Wwarn
        A family of options which selectively turn on/off warnings
-       (for help on the names of warnings use dialyzer -Whelp)
+       (for help on the names of warnings use dialyzer -Whelp).
    --shell
-       Do not disable the Erlang shell while running the GUI
+       Do not disable the Erlang shell while running the GUI.
    --version (or -v)
-       Prints the Dialyzer version and some more information and exits
+       Print the Dialyzer version and some more information and exit.
    --help (or -h)
-       Prints this message and exits
+       Print this message and exit.
    --quiet (or -q)
-       Makes Dialyzer a bit more quiet
+       Make Dialyzer a bit more quiet.
    --verbose
-       Makes Dialyzer a bit more verbose
+       Make Dialyzer a bit more verbose.
    --build_plt
        The analysis starts from an empty plt and creates a new one from the
        files specified with -c and -r. Only works for beam files.
        Use --plt or --output_plt to override the default plt location.
    --add_to_plt
        The plt is extended to also include the files specified with -c and -r.
-       Use --plt to specify wich plt to start from, and --output_plt to 
+       Use --plt to specify which plt to start from, and --output_plt 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.
@@ -200,23 +212,23 @@ Options:
        from the plt. Note that this may cause a re-analysis of the remaining
        dependent files.
    --check_plt
-       Checks the plt for consistency and rebuilds it if it is not up-to-date.
+       Check the plt for consistency and rebuild it if it is not up-to-date.
    --no_check_plt
        Skip the plt check when running Dialyzer. Useful when working with
        installed plts that never change.
    --plt_info
-       Makes Dialyzer print information about the plt and then quit. The plt 
-       can be specified with --plt.
+       Make Dialyzer print information about the plt and then quit. The plt
+       can be specified with --plt(s).
    --get_warnings
-       Makes Dialyzer emit warnings even when manipulating the plt. Only 
-       emits warnings for files that are actually analyzed.
+       Make Dialyzer emit warnings even when manipulating the plt. Warnings
+       are only emitted for files that are actually analyzed.
    --dump_callgraph file
        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.
    --no_native (or -nn)
-       Bypass the native code compilation of some key files that dialyzer
+       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.
    --gui
@@ -236,12 +248,17 @@ Warning options:
      Suppress warnings for unused functions.
   -Wno_improper_lists
      Suppress warnings for construction of improper lists.
+  -Wno_tuple_as_fun
+     Suppress warnings for using tuples instead of funs.
   -Wno_fun_app
      Suppress warnings for fun applications that will fail.
   -Wno_match
      Suppress warnings for patterns that are unused or cannot match.
+  -Wno_opaque
+     Suppress warnings for violations of opaqueness of data types.
   -Wunmatched_returns ***
-     Include warnings for function calls which ignore the return value(s).
+     Include warnings for function calls which ignore a structured return
+     value or do not match against one of many possible return value(s).
   -Werror_handling ***
      Include warnings for functions that only return by means of an exception.
   -Wrace_conditions ***
@@ -262,7 +279,7 @@ The following options are also available but their use is not recommended:
      Warn when the -spec is different than the success typing.
 
 Note:
-   *** These are options that turn on warnings rather than turning them off.
+   *** Identifies options that turn on warnings rather than turning them off.
 
 
 -----------------------------------------------