`within` changes the behavior of `modules: {as: }`

Description

- modules:
    - name: [Data.List.NonEmpty] 
      as: NE

- modules:
    - name: [Data.List.NonEmpty] 
      as: NE
      within: [ ... ]

Contributor guide

Tech stack

None

Domain

tooling

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

active

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Understanding of hlint configurationBasic Haskell knowledge

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

Investigate the interaction between the `within` and `as` keys in hlint's module rule parsing. Look at the source code that handles configuration (likely in files like `src/Hint/Module.hs` or similar). The issue suggests that applying a `within` list causes the `as` key to be ignored, so the parsing logic that applies filters for `within` may override or skip the `as` mapping. Check how the module rules are transformed when `within` is present and ensure that the `as` alias is preserved.