foundation-0.0.4: Alternative prelude with batteries and no dependencies

Safe HaskellNone







class Path path where Source #

Path type class

defines the Path associated types and basic functions to implement related to the path manipulation

# TODO, add missing enhancement:

splitExtension :: PathEnt path -> (PathEnt path, PathEnt path)
addExtension  :: PathEnt path -> PathEnt path -> PathEnt path
(.) :: path -> PathEnt path -> path
(-.) :: path -> PathEnt path -> path

Minimal complete definition

(</>), splitPath, buildPath

Associated Types

type PathEnt path Source #

the associated PathEntity of the given path this type is the minimal element contained in the Path a Path is not a collection but it is possible to see this associated type equivalent to the Element type family

type PathPrefix path Source #

the associated prefix of the given path

in the case of a FilePath, it is a void (i.e. `()`) in the case of a URI, it is the schema, host, port...

type PathSuffix path Source #

the associated suffix of the given path

in the case of the FilePath, it is a void (i.e. `()`) in the case of the URI, it is a the query, the fragment


(</>) :: path -> PathEnt path -> path Source #

join a path entity to a given path

splitPath :: path -> (PathPrefix path, [PathEnt path], PathSuffix path) Source #

split the path into the associated elements

buildPath :: (PathPrefix path, [PathEnt path], PathSuffix path) -> path Source #

build the path from the associated elements

filename :: (Path path, Monoid (PathEnt path)) => path -> PathEnt path Source #

get the filename of the given path

If there is no filename, you will receive the mempty of the PathEnt

>>> filename ("foo.hs" :: FilePath)
>>> filename ("foo/bar/baz.hs" :: FilePath)

parent :: Path path => path -> path Source #

parent is only going to drop the filename.

if you actually want to reference to the parent directory, simply uses:

parent "." = "." <> ".."
>>> parent ("foo.hs" :: FilePath)
>>> parent ("foo/bar/baz.hs" :: FilePath)

prefix :: Path path => path -> PathPrefix path Source #

get the path prefix information

>>> prefix ("/home/tab" :: FilePath)
>>> prefix ("home/tab" :: FilePath)

or for URI (TODO, not yet accurate)

prefix ""
   == URISchema http Nothing Nothing "" Nothing

suffix :: Path path => path -> PathSuffix path Source #

get the path suffix information

>>> suffix ("/home/tab" :: FilePath)

or for URI (TODO, not yet accurate)

suffix ""
   == URISuffix (["w", "1"], Nothing)


data FilePath Source #

FilePath is a collection of FileName

TODO: Eq and Ord are implemented using Show This is not very efficient and would need to be improved Also, it is possible the ordering is not necessary what we want in this case.

A FilePath is one of the following:

  • An Absolute:
  • starts with one of the follwing "/"
  • A relative:
  • don't start with a "/"
  • authorised:
  • "/"
  • "filepath"
  • "."
  • ".."
  • "workhaskellhs-foundation"
  • unauthorised
  • "path//"

data FileName Source #

A filename (or path entity) in the FilePath

  • Authorised
  • ""
  • "."
  • ".."
  • "foundation"
  • Unauthorised
  • "/"
  • "file/"
  • "/file"
  • "file/path"


filePathToLString :: FilePath -> [Char] Source #

conversion of a FilePath into a list of Char

this function may throw exceptions