Microsoft/monaco-editor

[Bug] Incorrect Pascal string formatting

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#5086 opened on Nov 5, 2025

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Description

Reproducible in vscode.dev or in VS Code Desktop?

  • Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

Monaco Editor Playground Link

This issue is for Pascal

Only one format of pascal comments is working. Parentheses with Asterisks (* *) are not working, Curly Braces { } are working.

Monaco Editor Playground Code

{ TODO -oUser -cConsole Main : Insert code here }
(* TODO -oUser -cConsole Main : Insert code here *)

Reproduction Steps

Actual (Problematic) Behavior

No response

Expected Behavior

No response

Additional Context

No response

Contributor guide

Tech stack
javascripttypescript
Domain
frontend
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.
1-3 hours
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
Monaco editor basicsPascal syntax
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
The issue is about incomplete comment tokenization for Pascal. The { } comments work, but (* *) comments do not. Investigate the Pascal language definition in the monaco editor repository, likely in the file src/basic languages/pascal/pascal.ts. Check the tokenizer rules for comment detection and ensure that (* and *) are properly recognized as comment delimiters. Look at how { } comments are handled and replicate that for (* *).