Microsoft/monaco-editor

TS regex missed by Monarch grammar

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#2,512 opened on Jun 2, 2021

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Description

Extracted from https://github.com/microsoft/TypeScript-Website/issues/1870

const x = true ? /^([^"]*)"/ : /^([^']*)'/

/^([^"]*)"/ is not identified as a regex by the TS Monarch grammar, which breaks bracket matching:

image

Contributor guide

Research direction
Study the TypeScript Monarch grammar file and identify how regex tokens are recognized; then adjust the grammar to recognize regex patterns after `/: /^([^\"]*)\"/` in ternary expressions.
Tech stack
typescript
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.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScriptMonarch grammar
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40