command-qq: Quasiquoters for external commands

This is a package candidate release! Here you can preview how this package release will appear once published to the main package index (which can be accomplished via the 'maintain' link below). Please note that once a package has been published to the main package index it cannot be undone! Please consult the package uploading documentation for more information.

[maintain] [Publish]

Features:

>>> [sh_| echo hello world! |]
hello world!
ghci = quoter $ callCommand "ghc" ["-ignore-dot-ghci", "-e"]

Then you can use ghci in ghci!

>>> [ghci| putStrLn "hello world!" |] :: IO ()
hello world!

For more examples, see examples/CustomQQ.hs

See README.md for an example

See examples/CommandT.hs


[Skip to Readme]

Properties

Versions 0.1.0.0, 0.2.0.0, 0.2.0.0, 0.2.1.0, 0.2.2.0, 0.3.0.0, 0.3.1.0
Change log CHANGELOG.md
Dependencies base (>=4 && <5), process, template-haskell, text [details]
License BSD-3-Clause
Author Matvey Aksenov
Maintainer matvey.aksenov@gmail.com
Category System
Home page http://biegunka.github.io/command-qq/
Source repo head: git clone https://github.com/biegunka/command-qq
Uploaded by MatveyAksenov at 2013-12-13T07:17:40Z

Modules

[Index]

Downloads

Maintainer's Corner

Package maintainers

For package maintainers and hackage trustees


Readme for command-qq-0.2.0.0

[back to package description]

command-qq

Hackage Build Status Build Status

>>> import System.Command.QQ
>>> putStr =<< unlines . reverse . lines <$> [sh|cowsay "Hello, I am command-qq!"|]
                ||     ||
                ||----w |
            (__)\       )\/\
         \  (oo)\_______
        \   ^__^
 -------------------------
< Hello, I am command-qq! >
 _________________________

Install

% cabal install command-qq

Features

Quasiquotation syntax for external interpreters

>>> [sh_| echo hello world! |]
hello world!

Custom quasiquoters

ghci = quoter $ callCommand "ghc" ["-ignore-dot-ghci", "-e"]

Then you can use ghci in ghci!

>>> [ghci| putStrLn "hello world!" |] :: IO ()
hello world!

For more examples, see examples/CustomQQ.hs

Haskell values embedding

Let's define Embed instance for a custom data type:

data Bang = Bang

instance Embed Bang where
  embed Bang = "!"

Then you can use variables of Bang type in quoted strings!

>>> [sh_| echo hello#{Bang} |]
hello!
>>> let bang = Bang in [sh_| echo hello#{bang} |]
hello!

Note, command-qq does not support full Haskell in embeddings, only variables/constructors names and literals

DSLs

See examples/CommandT.hs