th-format: Template Haskell based support for format strings
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.
Properties
| Versions | 0.1.0.0, 0.1.0.0, 0.1.1.0, 0.1.2.0, 0.1.3.0 |
|---|---|
| Change log | None available |
| Dependencies | base (>=4.7 && <5), Earley, haskell-src-meta, template-haskell, text [details] |
| License | BSD-3-Clause |
| Copyright | 2017-2018 Moritz Clasmeier |
| Author | Moritz Clasmeier |
| Maintainer | mtesseract@silverratio.net |
| Category | Data |
| Home page | https://github.com/mtesseract/th-format#readme |
| Bug tracker | https://github.com/mtesseract/th-format/issues |
| Source repo | head: git clone https://github.com/mtesseract/th-format |
| Uploaded | by mtesseract at 2018-03-20T22:47:08Z |
Modules
[Index]
- Data
Downloads
- th-format-0.1.0.0.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
Package maintainers
For package maintainers and hackage trustees
Readme for th-format-0.1.0.0
[back to package description]th-format 
About
This is th-format, a Haskell package implementing support for format
strings using Template Haskell quasi quoters. It requires the GHC
extension QuasiQuotes to be enabled. Parsing is implemented using
Earley.
This package is BSD3 licensed.
Examples
Using th-format, you can use naive variable interpolation instead of
verbosely concatenating strings manually. Thus, instead of
putStrLn $ "Client \"" ++ show client ++ "\" has requested resource \"" ++ show resource ++ "\" at date " ++ show date ++ "."
one can directly write:
putStrLn $ [fmt|Client "$client" has requested resource "$resource" at date $date|]
There are currently two supported ways of interpolation:
- Simple interpolation, as in
[fmt|Variable foo contains $foo|]. - Expression interpolation, as in
[fmt|The toggle is ${if toggle then ("on" :: Text) else "off"}|]