vimeo/psalm

Make callable case sensitive

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#8,089 opened on Jun 11, 2022

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 (6 comments) (0 reactions) (0 assignees)PHP (5,369 stars) (668 forks)batch import
Help wantedenhancement

Description

https://psalm.dev/r/c501c4d192

This is perfectly valid PHP, since function and class names are case insensitive. However I think it would be good form to enforce case-sensitivity for callables.

Contributor guide

Tech stack
None
Domain
tooling
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.
half day
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
PHP basicsPsalm internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate how Psalm currently handles callable types and where case normalization occurs. Review existing tests for callable type resolution. Consider adding a configuration option or always enforcing case sensitivity. Check for any related issues or PRs.