typist: Typelevel printf
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- No 'description' field.
- 'ghc-options: -O2' is rarely needed. Check that it is giving a real benefit and not just imposing longer compile times on your users.
- These packages miss upper bounds: - text - text-show Please add them, using `cabal gen-bounds` for suggestions. For more information see: https://pvp.haskell.org/
Properties
| Versions | 0.1.0.0, 0.1.0.1, 0.1.0.1 |
|---|---|
| Change log | CHANGELOG.md |
| Dependencies | base (>=4.16 && <4.20), text, text-show [details] |
| License | MIT |
| Author | Danil Berestov |
| Maintainer | goosedb@yandex.ru |
| Category | Text |
| Home page | https://github.com/goosedb/typist |
| Uploaded | by goosedb at 2024-04-30T14:12:14Z |
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[back to package description]Typist
Typist is a library for interpolation. It uses type-level strings (Symbols) for template. It uses UnconsSynbol type family which is added in GHC-9.2, so you need GHC version 9.2 or higher to use it.
Core functionality is in Typist.Internal.Format:
- Type family
Formatwhich transformsSymbolto function which renders final string Argnewtype overText.Lazy.Builderwhich carries name of parameter and it's position in string on type-level (for perfomance goods)- Type class
Interpolatewhich renders final string on term level
An example of wrapping it (and also ready to use interface) is located in Typist.TextShow:
Unquotednewtype for interpolation strings without\"#=set operator Example (more examples can be found intest/Test):
question = fmt @"Hello, #{name}, do you like #{dish}?" $
(#name #= Unquoted "Mike") .
(#dish #= Unquoted "pasta")
Performance is comparable with bare concatenation with <>. Benches can be found at test/Bench
O2
O1
O0
To run benchmark use
$ cabal bench --benchmark-options '--svg results_cpu.svg'