gleam-lang/gleam

"Rename type parameter" LS action

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#5,762 opened on May 28, 2026

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help wanted

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Description

Given a function like:

fn resolve_player_id(player_view: PlayerView(player_id), player: PlayerMatcher) -> player_id {
                                                                                       ^ cursor here

Invoking such action would prompt for a new name and rename all ocurrences of the parameter.

This could be implemented for type definitions too.

Contributor guide

Research direction
Implement a rename action for type parameters in the Gleam language server, following the pattern of existing rename actions.
Tech stack
rust
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.
Clear
Prerequisites
RustGleam
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55