highlightjs/highlight.js

(C++) highlight incorrectly

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#3,505 opened on Mar 21, 2022

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Description

Describe the issue

Screenshot_20220320_225211

Everything after the define line has no highlighting.

Which language seems to have the issue?

C++

Are you using highlight or highlightAuto?

highlight.js 11.5.0

Sample Code to Reproduce

int a = 1;

#define what do { cout << ">"; } while (0)

int main() {
}

Expected behavior

Highlight correctly after the define line.

Contributor guide

Research direction
Examine the C++ language grammar definition in highlight.js to identify how `#define` and other preprocessor directives are handled. Look for patterns that might cause highlighting to break after a multiline define or complex expression. Check for missing end delimiters or scope issues.
Tech stack
javascriptcpp
Domain
frontenddeveloper experience
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.
1-2 days
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
C++highlight.js grammar
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60