Скачать или смотреть How to Disable Multi-line Comment Colors in Verilog Mode Using Vim

A step-by-step guide on how to turn off the syntax highlighting colors for multi-line comments in Verilog files when using Vim, while keeping single-line comments highlighted.
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This video is based on the question https://stackoverflow.com/q/65583494/ asked by the user 'Cliff Cummings' ( https://stackoverflow.com/u/1486442/ ) and on the answer https://stackoverflow.com/a/65585717/ provided by the user 'Matt' ( https://stackoverflow.com/u/4419802/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

If you're editing Verilog files in Vim and are experiencing an annoying issue with syntax highlighting, you're not alone. Many users have reported that the highlighting for multi-line comments (/* */) can cause unwanted color changes, particularly when dealing with extensive directory structures and libmap files. In this guide, we'll explore how to disable the colors for multi-line comments, enabling a smoother editing experience while still keeping the highlights for single-line comments (//).

The Problem with Multi-line Comments

As a quick recap, if you're working with Verilog libmap files, you might have noticed that:

Large Directory Structures: Searching through multiple directories can lead to extensive directory wildcard searches, increasing the frequency of multi-line comments being used.

Color Fluctuation: Each use of /* enables comment colors, and each */ disables them. This toggling can sometimes lead to comments appearing inactive on subsequent lines, creating confusion and disrupting your workflow.

In short, you may want to retain the color coding for single-line comments but eliminate it for multi-line comments to avoid the hassle. Let’s get into how to achieve that.

Solution: Modifying the Syntax Highlighting

To disable the syntax highlighting specifically for multi-line comments in Verilog files while still allowing highlights for single-line comments, you can follow these steps:

Step 1: Create an After Syntax File

Instead of altering the default syntax file (which isn't advisable), we will create an "after" syntax file for our modifications.

Open your terminal or command line interface.

Create a new file at the following path: ~/.vim/after/syntax/verilog.vim.

Step 2: Edit the New Syntax File

Now that you have the new syntax file prepared, it’s time to edit it. You will need to write specific commands to clear the multi-line comment formatting.

Add the following lines to your verilog.vim file:

[[See Video to Reveal this Text or Code Snippet]]

Understanding the Code

syntax clear verilogComment: This command clears any existing syntax highlighting rules for comments defined in the Verilog files.

syntax match verilogComment "//.*" contains=verilogTodo,@ Spell: This command will preserve the highlight for single-line comments while ignoring multi-line comments.

The last line, starting with syntax region, is commented out to ensure that multi-line comments do not get any highlighting.

Step 3: Save and Test Your Changes

After making the above additions, save the verilog.vim file. You can test the changes by reopening a Verilog file in Vim. You should see that single-line comments are still highlighted, while the multi-line comments no longer toggle color.

Conclusion

By following the above instructions, you can effectively disable the syntax highlighting for multi-line comments in Verilog files when using Vim. While working with frequent directory searches, this adjustment can enhance your editing experience and reduce visual clutter.

Whether you're an experienced developer or just getting started with Verilog, these tweaks in Vim can save you from potential confusion caused by unnecessary color changes.

If you have further questions or need customization beyond this, feel free to explore more within your Vim environment. Happy coding!