edoc(3)

NAME
edoc - EDoc - the Erlang program documentation generator.

DESCRIPTION

EDoc - the Erlang program documentation generator.

This module provides the main user interface to EDoc.

    *   EDoc User Manual

    *   Running EDoc

DATA TYPES

    comment() = erl_comment_scan:comment():

    edoc_module() = xmerl_scan:xmlElement():

        The EDoc documentation data for a module, expressed as an XML document in XMerL format. See the file edoc.dtd for details.

    entry() = #entry{name=function_name() | atom(), args=[atom() | list()], line=integer(), export=boolean(), data=entry_data()}:

        Module Entries (one per function, plus module header and footer).

    entry_data() = term():

    env() = #env{}:

        Environment information needed by EDoc for generating references.

    filename() = file:filename():

    function_name() = {atom(), integer()}:

    module_meta() = #module{name=[] | atom(), parameters=none | [atom()], functions=ordset(function_name()), exports=ordset(function_name()), attributes=ordset({atom(), term()}), records=[{atom(), [{atom(), term()}]}], encoding=epp:source_encoding(), file=file:filename()}:

        Module information.

    ordset(T) = ordsets:ordset(T):

    proplist() = proplists:proplist():

    syntaxTree() = erl_syntax:syntaxTree():

    tag() = #tag{name=atom(), line=integer(), origin=comment | code, data=term(), form=undefined | erl_parse:abstract_form()}:

        Generic tag information. #tag.form is only defined if #tag.origin is code, that is the #tag{} represents a code fragment, not a doc comment tag.

EXPORTS

application(App::atom()) -> ok

    Equivalent to application(Application, []).

application(App, Options) -> ok

    Types:
        App = atom()
        Options = proplist()

    Run EDoc on an application in its default app-directory. See application/3 for details.

    See also: application/1.

application(App, Dir, Options) -> ok

    Types:
        App = atom()
        Dir = filename()
        Options = proplist()

    Run EDoc on an application located in the specified directory. Tries to automatically set up good defaults. Unless the user specifies otherwise:

        *   The doc subdirectory will be used as the target directory, if it exists; otherwise the application directory is used.

        *   The source code is assumed to be located in the src subdirectory, if it exists, or otherwise in the application directory itself.

        *   The subpackages option is turned on. All found source files will be processed.

        *   The include subdirectory is automatically added to the include path. (Only important if preprocessing is turned on.)

    See run/2 for details, including options.

    See also: application/2.

file(Name::filename()) -> ok

    This function is deprecated: See file/2 for details.

    Equivalent to file(Name, []).

file(Name, Options) -> ok

    Types:
        Name = filename()
        Options = proplist()

    This function is deprecated: This is part of the old interface to EDoc and is mainly kept for backwards compatibility. The preferred way of generating documentation is through one of the functions application/2 and files/2.

    Reads a source code file and outputs formatted documentation to a corresponding file.

    Options:

        {dir, filename()}:
            Specifies the output directory for the created file. (By default, the output is written to the directory of the source file.)

        {source_suffix, string()}:
            Specifies the expected suffix of the input file. The default value is ".erl".

        {file_suffix, string()}:
            Specifies the suffix for the created file. The default value is ".html".

    See get_doc/2 and layout/2 for further options.

    For running EDoc from a Makefile or similar, see edoc_run:file/1.

    See also: read/2.

files(Files::[filename()]) -> ok

files(Files, Options) -> ok

    Types:
        Files = [filename()]
        Options = proplist()

    Runs EDoc on a given set of source files. See run/2 for details, including options.

get_doc(File::filename()) -> {module(), edoc_module()}

    Equivalent to get_doc(File, []).

get_doc(File, Options) -> R

    Types:
        File = filename()
        Options = proplist()
        R = {module(), edoc_module()} | {module(), edoc_module(), [entry()]}

    Reads a source code file and extracts EDoc documentation data. Note that without an environment parameter (see get_doc/3), hypertext links may not be correct.

    Options:

        {def, Macros}:

            *   Macros = Macro | [Macro]

            *   Macro = {Name::atom(), Text::string() | MacroFun}

            *   MacroFun = fun((MacroArgument::string(), Line::integer(), edoc_lib:edoc_env()) -> (Text::string()))

            Specifies a set of user-defined EDoc macros. The text substituted for macro calls is specified as either a string() or a function(). The function is called with the macro argument text, the current line number, and the current environment. The fun is to return a string(). See Macro expansion for details.

        {hidden, boolean()}:
            If the value is true, documentation of hidden functions will also be included. The default value is false.

        {private, boolean()}:
            If the value is true, documentation of private functions will also be included. The default value is false.

        {todo, boolean()}:
            If the value is true, To-Do notes written using @todo or @TODO tags will be included in the documentation. The default value is false.

    See read_source/2, read_comments/2 and edoc_lib:get_doc_env/3 for further options.

    See also: get_doc/3, layout/2, read/2, run/2, edoc_extract:source/5.

get_doc(File, Env, Options) -> R

    Types:
        File = filename()
        Env = env()
        Options = proplist()
        R = {module(), edoc_module()} | {module(), edoc_module(), [entry()]}

    Like get_doc/2, but for a given environment parameter. Env is an environment created by edoc_lib:get_doc_env/3.

layout(Doc::edoc_module()) -> string()

    Equivalent to layout(Doc, []).

layout(Doc, Opts) -> string()

    Types:
        Doc = edoc_module()
        Opts = proplist()

    Transforms EDoc module documentation data to text. The default layout creates an HTML document.

    Options:

        {layout, Module::atom()}:
            Specifies a callback module to be used for formatting. The module must export a function module(Doc, Options). The default callback module is edoc_layout; see edoc_layout:module/2 for layout-specific options.

    See also: file/2, layout/1, read/2, run/2.

read(File::filename()) -> string()

    Equivalent to read(File, []).

read(File, Opts) -> string()

    Types:
        File = filename()
        Opts = proplist()

    Reads and processes a source file and returns the resulting EDoc-text as a string. See get_doc/2 and layout/2 for options.

    See also: file/2.

read_comments(File::filename()) -> [comment()]

    Equivalent to read_comments(File, []).

read_comments(File, Opts) -> [comment()]

    Types:
        File = filename()
        Opts = proplist()

    Extracts comments from an Erlang source code file. See the module erl_comment_scan(3) for details on the representation of comments. Currently, no options are available.

read_source(Name::filename()) -> [syntaxTree()]

    Equivalent to read_source(File, []).

read_source(File, Opts) -> [syntaxTree()]

    Types:
        File = filename()
        Opts = proplist()

    Reads an Erlang source file and returns the list of "source code form" syntax trees.

    Options:

        {preprocess, boolean()}:
            If the value is true, the source file will be read via the Erlang preprocessor (epp). The default value is false. no_preprocess is an alias for {preprocess, false}.

            Normally, preprocessing is not necessary for EDoc to work, but if a file contains too exotic definitions or uses of macros, it will not be possible to read it without preprocessing. Note: comments in included files will not be available to EDoc, even with this option enabled.

        {includes, Path::[string()]}:
            Specifies a list of directory names to be searched for include files, if the preprocess option is turned on. Also used with the @headerfile tag. The default value is the empty list. The directory of the source file is always automatically appended to the search path.

        {macros, [{atom(), term()}]}:
            Specifies a list of pre-defined Erlang preprocessor (epp) macro definitions, used if the preprocess option is turned on. The default value is the empty list.

        {report_missing_types, boolean()}:
            If the value is true, warnings are issued for missing types. The default value is false. no_report_missing_types is an alias for {report_missing_types, false}.

        {link_predefined_types, boolean()}:
            If the value is true, all predefined data types will have a link to the erlang module. This option is to be used when generating documentation for the Erlang/OTP docs. The default value is false. no_link_predefined_types is an alias for {link_predefined_types, false}.

    See also: erl_syntax(3), get_doc/2.

run(Files, Opts) -> ok

    Types:
        Files = [filename()]
        Opts = proplist()

    Runs EDoc on a given set of source files. Note that the doclet plugin module has its own particular options; see the doclet option below.

    Also see layout/2 for layout-related options, and get_doc/2 for options related to reading source files.

    Options:

        {app_default, string()}:
            Specifies the default base URI for unknown applications.

        {application, App::atom()}:
            Specifies that the generated documentation describes the application App. This mainly affects generated references.

        {dir, filename()}:
            Specifies the target directory for the generated documentation.

        {doc_path, [string()]}:
            Specifies a list of file system paths pointing to directories that contain EDoc-generated documentation. All paths for applications in the code path are automatically added.

        {doclet, Module::atom()}:
            Specifies a callback module to be used for creating the documentation. The module must export a function run(Cmd, Ctxt). The default doclet module is edoc_doclet; see edoc_doclet:run/2 for doclet-specific options.

        {file_suffix, string()}:
            Specifies the suffix used for output files. The default value is ".html". Note that this also affects generated references.

        {new, boolean()}:
            If the value is true, any existing edoc-info file in the target directory will be ignored and overwritten. The default value is false.

        {source_path, [filename()]}:
            Specifies a list of file system paths used to locate the source code for packages.

        {source_suffix, string()}:
            Specifies the expected suffix of input files. The default value is ".erl".

        {subpackages, boolean()}:
            If the value is true, all subpackages of specified packages will also be included in the documentation. The default value is false. no_subpackages is an alias for {subpackages, false}.

            Subpackage source files are found by recursively searching for source code files in subdirectories of the known source code root directories. (Also see the source_path option.) Directory names must begin with a lowercase letter and contain only alphanumeric characters and underscore, or they will be ignored. (For example, a subdirectory named test-files will not be searched.)

    See also: application/2, files/2.

AUTHORS

Richard Carlsson <carlsson.richard@gmail.com>