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---
title: Supporting New Languages
url: /extend/new-languages/
---
The steps to cover a new programming language are:
1. Write the grammar. This is the hardest part.
1. Write a parser (a parser simply parses an input based on your grammar to yield a parse tree).
1. Test your grammar, to ensure it is able to parse real-life language files.
1. Write a few parse tree visitors. Some visitors will compute metrics such as [executable lines](/extend/executable-lines/), while others will enforce [coding rules](/extend/adding-coding-rules/). A dozen or so visitors is sufficient for an initial release.
1. Write a scanner Sensor, in a SonarQube plugin, to launch the visitors.
1. Compute
1. issues
1. raw measures
1. code duplications
1. syntax highlighting
1. symbol table
1. coverage information (lines/branches to cover, line/branch hits)
In fulfilling these steps, the [SonarSource Language Recognizer (SSLR)](https://github.com/SonarSource/sslr) can be an important resource.
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