-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/

-- | Configuration file reading & writing
--   
--   Parser and writer for handling sectioned config files in Haskell.
--   
--   The ConfigFile module works with configuration files in a standard
--   format that is easy for the user to edit, easy for the programmer to
--   work with, yet remains powerful and flexible. It is inspired by, and
--   compatible with, Python's ConfigParser module. It uses files that
--   resemble Windows .INI-style files, but with numerous improvements.
--   
--   ConfigFile provides simple calls to both read and write config files.
--   It's possible to make a config file parsable by this module, the Unix
--   shell, and make.
@package ConfigFile
@version 1.1.4

-- | Internal types for Data.ConfigFile. This module is not intended
--   to be used directly by your programs.
--   
--   Copyright (c) 2004-2008 John Goerzen, jgoerzen@complete.org
--   
--   This program is distributed in the hope that it will be useful, but
--   WITHOUT ANY WARRANTY; without even the implied warranty of
--   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
module Data.ConfigFile.Types

-- | Storage of options.
type CPOptions = Map OptionSpec String

-- | The main data storage type (storage of sections).
--   
--   PLEASE NOTE: This type is exported only for use by other modules under
--   Data.ConfigFile. You should NEVER access the FiniteMap in a
--   ConfigParser directly. This type may change in future releases of
--   MissingH, which could break your programs. Please retrict yourself to
--   the interface in ConfigFile.
type CPData = Map SectionSpec CPOptions

-- | Possible ConfigParser errors.
data CPErrorData

-- | Parse error
ParseError :: String -> CPErrorData

-- | Attempt to create an already-existing ection
SectionAlreadyExists :: SectionSpec -> CPErrorData

-- | The section does not exist
NoSection :: SectionSpec -> CPErrorData

-- | The option does not exist
NoOption :: OptionSpec -> CPErrorData

-- | Miscellaneous error
OtherProblem :: String -> CPErrorData

-- | Raised by interpolatingAccess if a request was made for a
--   non-existant option
InterpolationError :: String -> CPErrorData

-- | Indicates an error occurred. The String is an explanation of the
--   location of the error.
type CPError = (CPErrorData, String)

-- | This is the main record that is used by ConfigFile.
data ConfigParser
ConfigParser :: CPData -> (OptionSpec -> OptionSpec) -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String) -> Bool -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String) -> ConfigParser

-- | The data itself
[content] :: ConfigParser -> CPData

-- | How to transform an option into a standard representation
[optionxform] :: ConfigParser -> (OptionSpec -> OptionSpec)

-- | Function to look up an option, considering a default value if
--   usedefault is True; or ignoring a default value otherwise. The
--   option specification is assumed to be already transformed.
[defaulthandler] :: ConfigParser -> ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String

-- | Whether or not to seek out a default action when no match is found.
[usedefault] :: ConfigParser -> Bool

-- | Function that is used to perform lookups, do optional interpolation,
--   etc. It is assumed that accessfunc will internally call defaulthandler
--   to do the underlying lookup. The option value is not assumed to be
--   transformed.
[accessfunc] :: ConfigParser -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String)

-- | Names of sections
type SectionSpec = String

-- | Names of options
type OptionSpec = String

-- | Internal output from parser
type ParseOutput = [(String, [(String, String)])]
instance GHC.Show.Show Data.ConfigFile.Types.CPErrorData
instance GHC.Classes.Ord Data.ConfigFile.Types.CPErrorData
instance GHC.Classes.Eq Data.ConfigFile.Types.CPErrorData
instance Control.Monad.Trans.Error.Error Data.ConfigFile.Types.CPError

-- | Parser support for Data.ConfigFile. This module is not intended
--   to be used directly by your programs.
--   
--   Copyright (c) 2004-2008 John Goerzen, jgoerzen@complete.org
--   
--   This program is distributed in the hope that it will be useful, but
--   WITHOUT ANY WARRANTY; without even the implied warranty of
--   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
module Data.ConfigFile.Parser
parse_string :: MonadError CPError m => String -> m ParseOutput
parse_file :: MonadError CPError m => FilePath -> IO (m ParseOutput)
parse_handle :: MonadError CPError m => Handle -> IO (m ParseOutput)
interpmain :: (String -> Either CPError String) -> Parser String

-- | Internal output from parser
type ParseOutput = [(String, [(String, String)])]

-- | Configuration file parsing, generation, and manipulation
--   
--   Copyright (c) 2004-2008 John Goerzen, jgoerzen@complete.org
--   
--   This program is distributed in the hope that it will be useful, but
--   WITHOUT ANY WARRANTY; without even the implied warranty of
--   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--   
--   This module contains extensive documentation. Please scroll down to
--   the Introduction section to continue reading.
module Data.ConfigFile

-- | Names of sections
type SectionSpec = String

-- | Names of options
type OptionSpec = String

-- | This is the main record that is used by ConfigFile.
data ConfigParser
ConfigParser :: CPData -> (OptionSpec -> OptionSpec) -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String) -> Bool -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String) -> ConfigParser

-- | The data itself
[content] :: ConfigParser -> CPData

-- | How to transform an option into a standard representation
[optionxform] :: ConfigParser -> (OptionSpec -> OptionSpec)

-- | Function to look up an option, considering a default value if
--   usedefault is True; or ignoring a default value otherwise. The
--   option specification is assumed to be already transformed.
[defaulthandler] :: ConfigParser -> ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String

-- | Whether or not to seek out a default action when no match is found.
[usedefault] :: ConfigParser -> Bool

-- | Function that is used to perform lookups, do optional interpolation,
--   etc. It is assumed that accessfunc will internally call defaulthandler
--   to do the underlying lookup. The option value is not assumed to be
--   transformed.
[accessfunc] :: ConfigParser -> (ConfigParser -> SectionSpec -> OptionSpec -> Either CPError String)

-- | Possible ConfigParser errors.
data CPErrorData

-- | Parse error
ParseError :: String -> CPErrorData

-- | Attempt to create an already-existing ection
SectionAlreadyExists :: SectionSpec -> CPErrorData

-- | The section does not exist
NoSection :: SectionSpec -> CPErrorData

-- | The option does not exist
NoOption :: OptionSpec -> CPErrorData

-- | Miscellaneous error
OtherProblem :: String -> CPErrorData

-- | Raised by interpolatingAccess if a request was made for a
--   non-existant option
InterpolationError :: String -> CPErrorData

-- | Indicates an error occurred. The String is an explanation of the
--   location of the error.
type CPError = (CPErrorData, String)

-- | The default empty ConfigFile object.
--   
--   The content contains only an empty mandatory DEFAULT section.
--   
--   optionxform is set to map toLower.
--   
--   usedefault is set to True.
--   
--   accessfunc is set to simpleAccess.
emptyCP :: ConfigParser

-- | Default (non-interpolating) access function
simpleAccess :: MonadError CPError m => ConfigParser -> SectionSpec -> OptionSpec -> m String

-- | Interpolating access function. Please see the Interpolation section
--   above for a background on interpolation.
--   
--   Although the format string looks similar to one used by
--   Text.Printf, it is not the same. In particular, only the
--   %(...)s format is supported. No width specifiers are supported and no
--   conversions other than s are supported.
--   
--   To use this function, you must specify a maximum recursion depth for
--   interpolation. This is used to prevent a stack overflow in the event
--   that the configuration file contains an endless interpolation loop.
--   Values of 10 or so are usually more than enough, though you could
--   probably go into the hundreds or thousands before you have actual
--   problems.
--   
--   A value less than one will cause an instant error every time you
--   attempt a lookup.
--   
--   This access method can cause get and friends to return a new
--   CPError: InterpolationError. This error would be
--   returned when:
--   
--   
--   
- The configuration file makes a reference to an option that does
--   not exist
--   
- The maximum interpolation depth is exceeded
--   
- There is a syntax error processing a %-directive in the
--   configuration file
--   
--   
--   An interpolation lookup name specifies an option only. There is no
--   provision to specify a section. Interpolation variables are looked up
--   in the current section, and, if usedefault is True, in
--   DEFAULT according to the normal logic.
--   
--   To use a literal percent sign, you must place %% in the
--   configuration file when interpolation is used.
--   
--   Here is how you might enable interpolation:
--   
--   
--   let cp2 = cp {accessfunc = interpolatingAccess 10}
--   
--   
--   The cp2 object will now support interpolation with a maximum
--   depth of 10.
interpolatingAccess :: MonadError CPError m => Int -> ConfigParser -> SectionSpec -> OptionSpec -> m String

-- | Loads data from the specified file. It is then combined with the given
--   ConfigParser using the semantics documented under merge
--   with the new data taking precedence over the old. However, unlike
--   merge, all the options as set in the old object are preserved
--   since the on-disk representation does not convey those options.
--   
--   May return an error if there is a syntax error. May raise an exception
--   if the file could not be accessed.
readfile :: MonadError CPError m => ConfigParser -> FilePath -> IO (m ConfigParser)

-- | Like readfile, but uses an already-open handle. You should use
--   readfile instead of this if possible, since it will be able to
--   generate better error messages.
--   
--   Errors would be returned on a syntax error.
readhandle :: MonadError CPError m => ConfigParser -> Handle -> IO (m ConfigParser)

-- | Like readfile, but uses a string. You should use
--   readfile instead of this if you are processing a file, since it
--   can generate better error messages.
--   
--   Errors would be returned on a syntax error.
readstring :: MonadError CPError m => ConfigParser -> String -> m ConfigParser

-- | The class representing the data types that can be returned by "get".
class Get_C a

-- | Retrieves a string from the configuration file.
--   
--   When used in a context where a String is expected, returns that string
--   verbatim.
--   
--   When used in a context where a Bool is expected, parses the string to
--   a Boolean value (see logic below).
--   
--   When used in a context where anything that is an instance of Read is
--   expected, calls read to parse the item.
--   
--   An error will be returned of no such option could be found or if it
--   could not be parsed as a boolean (when returning a Bool).
--   
--   When parsing to a Bool, strings are case-insentively converted as
--   follows:
--   
--   The following will produce a True value:
--   
--   
--   
- 1
--   
- yes
--   
- on
--   
- enabled
--   
- true
--   
--   
--   The following will produce a False value:
--   
--   
--   
- 0
--   
- no
--   
- off
--   
- disabled
--   
- false
--   
get :: (Get_C a, MonadError CPError m) => ConfigParser -> SectionSpec -> OptionSpec -> m a

-- | Returns a list of sections in your configuration file. Never includes
--   the always-present section DEFAULT.
sections :: ConfigParser -> [SectionSpec]

-- | Indicates whether the given section exists.
--   
--   No special DEFAULT processing is done.
has_section :: ConfigParser -> SectionSpec -> Bool

-- | Returns a list of the names of all the options present in the given
--   section.
--   
--   Returns an error if the given section does not exist.
options :: MonadError CPError m => ConfigParser -> SectionSpec -> m [OptionSpec]

-- | Indicates whether the given option is present. Returns True only if
--   the given section is present AND the given option is present in that
--   section. No special DEFAULT processing is done. No exception
--   could be raised or error returned.
has_option :: ConfigParser -> SectionSpec -> OptionSpec -> Bool

-- | Returns a list of (optionname, value) pairs representing the
--   content of the given section. Returns an error the section is invalid.
items :: MonadError CPError m => ConfigParser -> SectionSpec -> m [(OptionSpec, String)]

-- | Sets the option to a new value, replacing an existing one if it
--   exists.
--   
--   Returns an error if the section does not exist.
set :: MonadError CPError m => ConfigParser -> SectionSpec -> OptionSpec -> String -> m ConfigParser

-- | Sets the option to a new value, replacing an existing one if it
--   exists. It requires only a showable value as its parameter. This can
--   be used with bool values, as well as numeric ones.
--   
--   Returns an error if the section does not exist.
setshow :: (Show a, MonadError CPError m) => ConfigParser -> SectionSpec -> OptionSpec -> a -> m ConfigParser

-- | Removes the specified option. Returns a NoSection error if the
--   section does not exist and a NoOption error if the option does
--   not exist. Otherwise, returns the new ConfigParser object.
remove_option :: MonadError CPError m => ConfigParser -> SectionSpec -> OptionSpec -> m ConfigParser

-- | Adds the specified section name. Returns a SectionAlreadyExists
--   error if the section was already present. Otherwise, returns the new
--   ConfigParser object.
add_section :: MonadError CPError m => ConfigParser -> SectionSpec -> m ConfigParser

-- | Removes the specified section. Returns a NoSection error if the
--   section does not exist; otherwise, returns the new ConfigParser
--   object.
--   
--   This call may not be used to remove the DEFAULT section.
--   Attempting to do so will always cause a NoSection error.
remove_section :: MonadError CPError m => ConfigParser -> SectionSpec -> m ConfigParser

-- | Combines two ConfigParsers into one.
--   
--   Any duplicate options are resolved to contain the value specified in
--   the second parser.
--   
--   The ConfigParser options in the resulting object will be set as
--   they are in the second one passed to this function.
merge :: ConfigParser -> ConfigParser -> ConfigParser

-- | Converts the ConfigParser to a string representation that could
--   be later re-parsed by this module or modified by a human.
--   
--   Note that this does not necessarily re-create a file that was
--   originally loaded. Things may occur in a different order, comments
--   will be removed, etc. The conversion makes an effort to make the
--   result human-editable, but it does not make an effort to make the
--   result identical to the original input.
--   
--   The result is, however, guaranteed to parse the same as the original
--   input.
to_string :: ConfigParser -> String
instance Data.ConfigFile.Get_C GHC.Base.String
instance Data.ConfigFile.Get_C GHC.Types.Bool
instance GHC.Read.Read t => Data.ConfigFile.Get_C t

module Data.ConfigFile.Monadic
simpleAccess :: MonadError CPError m => SectionSpec -> OptionSpec -> ConfigParser -> m String
interpolatingAccess :: MonadError CPError m => Int -> SectionSpec -> OptionSpec -> ConfigParser -> m String
readfile :: MonadError CPError m => FilePath -> ConfigParser -> IO (m ConfigParser)
readhandle :: MonadError CPError m => Handle -> ConfigParser -> IO (m ConfigParser)
readstring :: MonadError CPError m => String -> ConfigParser -> m ConfigParser
has_section :: SectionSpec -> ConfigParser -> Bool
options :: MonadError CPError m => SectionSpec -> ConfigParser -> m [OptionSpec]
has_option :: SectionSpec -> OptionSpec -> ConfigParser -> Bool
items :: MonadError CPError m => SectionSpec -> ConfigParser -> m [(OptionSpec, String)]
set :: MonadError CPError m => SectionSpec -> OptionSpec -> String -> ConfigParser -> m ConfigParser
setshow :: (Show a, MonadError CPError m) => SectionSpec -> OptionSpec -> a -> ConfigParser -> m ConfigParser
remove_option :: MonadError CPError m => SectionSpec -> OptionSpec -> ConfigParser -> m ConfigParser
add_section :: MonadError CPError m => SectionSpec -> ConfigParser -> m ConfigParser
remove_section :: MonadError CPError m => SectionSpec -> ConfigParser -> m ConfigParser
