gleam-lang/gleam

Allow function literals in constants

Open

#3,942 opened on Dec 2, 2024

View on GitHub
 (2 comments) (2 reactions) (0 assignees)Rust (960 forks)batch import
help wanted

Repository metrics

Stars
 (21,417 stars)
PR merge metrics
 (Avg merge 10d 19h) (69 merged PRs in 30d)

Description

The ability to do something like this would be nice:

type FunctionWrapper {
  FunctionWrapper(fn(String) -> Int)
}
const my_function = FunctionWrapper(fn(something) { 0 })

Contributor guide

Research direction
Investigate the parser and type checker to allow function literals in constant expressions.
Tech stack
rust
Domain
compilers
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.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rustcompiler design
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40