storable-offset: Storable offsets for record fields

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Versions [RSS]	0.1.0.0
Dependencies	base (>=4.10 && <4.17) [details]
License	BSD-3-Clause
Copyright	2022 Oleksii Divak
Author	Oleksii Divak
Maintainer	Oleksii Divak <frozenwitness@gmail.com>
Category	FFI, Utility
Home page	https://github.com/burningwitness/storable-offset#readme
Bug tracker	https://github.com/burningwitness/storable-offset/issues
Source repo	head: git clone https://github.com/burningwitness/storable-offset
Uploaded	by OleksiiDivak at 2022-05-28T08:15:24Z
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Downloads	130 total (4 in the last 30 days)
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Status	Docs available [build log] Last success reported on 2022-05-28 [all 1 reports]

Tiny helper library that provides a way to access fields of Storable data structures.

Given an instance

{-# LANGUAGE DataKinds
           , MultiParamTypeClasses #-}

instance Offset "fieldName" DataType where rawOffset = #{offset data_type, field_name}

, you can now peek/poke fieldName directly using

{-# LANGUAGE TypeApplications #-}

peek $ offset @"fieldName" (ptr @DataType)

poke (offset @"fieldName" ptr) (val @DataType)