zsh-users/zsh-syntax-highlighting

History expansion followed by non-history char

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#713 opened on Mar 22, 2020

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Improvementgood first issue

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Description

A history expansion followed by a character ineligible for history expansion (e.g. =) isn't highlighted correctly. !!= unquoted is all highlighted as history expansion and "!!=" terminates the history expansion style on the first ! rather than the second.

Contributor guide

Research direction
Examine the parser for history expansion tokens in zsh syntax highlighting, particularly how it handles characters after `!!` that are not part of expansion. Check the regex or state machine for detecting history expansion boundaries.
Tech stack
shell
Domain
clitooling
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.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Shellzsh
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55