avh4/elm-format

(not yet decided) Switch to using trailing commas

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#100 opened on Jan 6, 2016

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help wanted

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Description

There is a proposal to modify elm-compiler to allow trailing commas in tuples, lists and records. If implemented, the official elm style guide will likely change to prefer trailing commas instead of leading commas, and to always add the optional final comma.

Contributor guide

Research direction
Investigate the parser and AST representation for tuples, lists, and records in elm compiler. Determine where trailing commas are currently rejected and how to modify the parser to accept them. Also review the style guide implications.
Tech stack
haskell
Domain
developer experience
Issue type
Feature
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.
1-2 days
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.
Mostly clear
Prerequisites
HaskellGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55