
CLion - Detailed Review
Coding Tools

CLion - Product Overview
Overview
CLion, developed by JetBrains, is a comprehensive Integrated Development Environment (IDE) specifically designed for C and C developers. Here’s a brief overview of its primary function, target audience, and key features.Primary Function
CLion is intended to make C and C development more productive and enjoyable. It provides a range of tools and features that assist developers in writing, debugging, and optimizing their code.Target Audience
The primary target audience for CLion is C and C developers. This includes professionals working on various projects, from system programming and embedded systems to high-performance computing and other applications that rely heavily on these languages.Key Features
Intelligent Coding Assistance
CLion offers smart and relevant code completion, highlighting, and refactoring capabilities. It includes features like postfix completion templates, which help in quickly generating boilerplate code such as constructors, destructors, getters, and setters.Debugging Capabilities
CLion boasts a friendly and powerful debugger that supports both GDB and LLDB, with feature parity for core dump debugging. The Time Travel Debug for C/C plugin allows for reverse debugging, enabling developers to record and rewind through the execution history of their application to identify issues.Project Navigation
The IDE provides efficient project navigation tools, including full-scale search, file structure navigation, and the ability to navigate to classes, files, symbols, declarations, definitions, and more. This helps developers quickly find their way through large codebases.Cross-Platform Compatibility
CLion is a cross-platform IDE, supporting OS X, Linux, and Windows. On Windows, it can be used with the MinGW and Cygwin tool sets.Documentation and Compiler Insights
The CLion Help plugin makes language documentation available within the IDE, even offline. The Compiler Explorer plugin allows developers to see compilation results from a remote Compiler Explorer instance, providing deeper insights into the compilation process.Additional Features
CLion also supports various other languages via plugins, such as HTML, CSS, JavaScript, and Lua. It integrates with other tools and frameworks, like Qt projects through Clazy, and enhances code analysis with global Data Flow Analysis and expanded MISRA support.Conclusion
Overall, CLion is a powerful tool that streamlines the development process for C and C developers, offering a suite of intelligent features to boost productivity and code quality.
CLion - User Interface and Experience
Simplified and Clean Design
CLion’s new user interface is designed to reduce visual complexity and provide easy access to essential features. The main toolbar has been simplified, and the tool window layout has been revamped for better organization. This redesign aims to offer a cleaner look and feel, making it easier for users to focus on their coding tasks.
Themes, Icons, and Fonts
The UI includes new Light, Dark, and Light with Light Header color themes, each with improved contrast and a consistent color palette. The Inter font is used across all supported operating systems for a uniform look. A new icon set features more distinguishable shapes and colors, enhancing legibility and visual balance.
User Interface Elements
The interface includes several key elements:
- Navigation Bar: Located at the bottom of the main window, this bar allows quick access to the project structure, specific files, and code elements. It can be moved to the top or hidden if needed.
- Editor: The editor is where you read, write, and explore your source code. It supports various features like smart completion, formatting, and code insights.
- Action Indicators and Action List: Icons in the gutter indicate quick-fixes and other actions. Pressing `Alt Enter` opens a list of available actions at the current caret position.
- Status Bar: This bar displays recent event messages, background task progress, and various widgets for project and IDE status. Users can customize which widgets are shown.
Ease of Use
CLion is designed to be user-friendly, especially for those familiar with JetBrains products. Starting a new project is straightforward, and adding files to the project can be done in one click. The IDE supports multiple project models such as CMake, Makefile, Gradle, and compilation databases, making it versatile for different development needs.
Additional Features
- Debugging and Analysis: CLion offers a powerful debugger and dynamic analysis tools, including support for unit testing frameworks like Google Test, Boost.Test, Doctest, and Catch. It also supports remote debugging and various version control systems.
- AI Assistant: Though not enabled by default, the AI Assistant plugin can explain code, answer questions, provide code suggestions, and generate documentation. However, it requires explicit consent and a JetBrains AI Service license.
Overall User Experience
The overall user experience in CLion is enhanced by its keyboard-centric approach, allowing users to select preferred keymaps or create their own. The IDE also supports plugins to expand its functionality, and features like Vim-emulation mode and a built-in terminal further enrich the user experience. The unified interface for popular version control systems and local history features help in managing projects efficiently.
In summary, CLion’s user interface is streamlined for ease of use, with a focus on reducing clutter and enhancing productivity through smart coding assistance, intuitive navigation, and comprehensive debugging tools.

CLion - Key Features and Functionality
CLion Overview
CLion, developed by JetBrains, is a comprehensive and feature-rich Integrated Development Environment (IDE) specifically designed for C and C development. Here are the key features and how they work, including the integration of AI:
Intelligent Coding Assistance
CLion offers advanced coding assistance, including smart code completion, code formatting, and code generation. It can automatically generate code for getters, setters, and more complex templates, saving you time on unnecessary typing. The IDE also provides refactorings to improve and clean up your code quickly.
Code Analysis and Debugging
CLion features powerful static analysis tools that highlight warnings and errors in your code as you type, suggesting quick-fixes. It includes a powerful debugger and dynamic analysis tools to investigate and solve problems with ease. The IDE supports various testing frameworks like Google Test, Boost.Test, Doctest, and Catch, and it can even generate test code for you.
AI Assistant
The AI Assistant plugin, though not enabled by default, provides AI-powered features for software development. To use it, you need to install the plugin, acquire a JetBrains AI Service license, and give explicit consent to the JetBrains AI Terms of Service. Once activated, the AI Assistant can explain code, answer questions about code fragments, provide code suggestions, generate documentation and commit messages, and more. This feature sends your code requests to a Large Language Model (LLM) provider to provide context and generate responses.
Project Management and Build Systems
CLion supports multiple project models, including CMake, Makefile, Gradle, and compilation databases. It offers smart CMake support with code generation, completion, and automatic target updates. You can easily manage your project files, build settings, and even debug CMake files directly within the IDE.
Collaboration and Version Control
CLion facilitates collaborative development with features like Code With Me, allowing real-time collaboration with colleagues. It also supports most popular Version Control Systems (VCS) such as Git, GitHub, Subversion, Mercurial, CVS, and Perforce. The IDE includes a built-in terminal and supports Vim-emulation mode for added flexibility.
Remote Development and Microcontrollers
CLion supports remote development through Full Remote Mode, WSL, or remote debugger setups. It also offers features for developing and debugging microcontrollers, including on-chip debugging options, Peripheral View for ARM devices, and FreeRTOS thread view.
Performance and Memory Analysis
The IDE integrates tools like Valgrind Memcheck and Google Sanitizers to detect memory errors, data races, and undefined behavior issues. It also includes a CPU Profiler for analyzing the performance of your application.
Customization and User Experience
CLion allows you to customize the editor themes and keymaps to your preferences. It includes instant navigation to symbols, classes, or files, and a “Search Everywhere” feature to find anything within the IDE quickly. The Quick Documentation pop-up helps you preview Doxygen-styled documentation, and you can generate stubs for Doxygen comments easily.
Conclusion
In summary, CLion combines traditional coding tools with advanced AI-driven features to enhance productivity, code quality, and overall development experience for C and C developers.

CLion - Performance and Accuracy
Performance
CLion is generally praised for its efficient performance, particularly on systems with limited resources. Here are some strategies to further optimize its performance:Enable CLion Nova
Switching to the CLion Nova engine, which uses the ReSharper C /Rider C language engine, can significantly improve responsiveness and accuracy compared to the legacy CLion Classic engine.Memory Management
Increasing the memory heap size can help alleviate performance slowdowns. This can be done through the Change Memory Settings dialog, the Toolbox app, or by modifying the `-Xmx` JVM option. CLion also provides memory indicators to monitor heap usage.Code Analysis Optimization
On-the-fly code analysis can be resource-intensive. You can configure the highlighting level for specific files or enable Power Save Mode to disable all inspections and background tasks. The Clangd-based engine, which is faster and more accurate for certain tasks, can also be utilized.Indexing
Excluding unnecessary directories and file types from indexing can speed up the IDE. Working with smaller CMake subprojects or creating a compilation database for specific parts of a large project can also help.Plugin Management
Disabling unnecessary plugins can improve performance, as each plugin can consume resources.Accuracy
CLion’s accuracy is enhanced by several features:Code Analysis
CLion’s real-time code inspection can catch errors and suggest fixes as you type, improving code quality and readability. The Clangd-based engine contributes to this accuracy by providing more precise results for tasks like error/warning annotation and code highlighting.Refactoring Tools
CLion’s refactoring tools are renowned for their accuracy, helping developers refactor code efficiently without introducing errors.AI Assistance
The AI Assistant in CLion can explain code, refactor it, and find problems, all while providing project-specific context. This helps in ensuring that the code is accurate and well-maintained.Limitations and Areas for Improvement
While CLion is highly regarded, there are some areas where it could be improved:Resource Intensive Projects
Although CLion is efficient, very large-scale projects might still experience performance issues. In such cases, optimizing memory settings and excluding unnecessary files from indexing becomes crucial.Customization
While CLion offers a clean and intuitive interface, it has fewer customization options compared to other IDEs like Visual Studio. This might be a limitation for developers who prefer a highly customizable environment.Debugging Tools
Although CLion’s debugging tools are solid, they may not be as comprehensive as those in Visual Studio. For example, CLion uses GDB or LLDB, which, while effective, might not offer all the advanced features available in Visual Studio’s debugger. In summary, CLion stands out for its performance and accuracy, especially in the context of C and C development. By leveraging its optimization features and AI-driven tools, developers can maintain a responsive and efficient development environment. However, there are areas such as customization and advanced debugging where other IDEs might offer more extensive capabilities.
CLion - Pricing and Plans
The Pricing Structure for CLion
The pricing structure for CLion, a cross-platform IDE for C and C developed by JetBrains, is structured around annual subscriptions with various tiers and discounts. Here’s a breakdown of the available plans and their features:
Commercial Annual Subscriptions
First Year Subscription
- Price: $224.42 per year (or $19.90 per month for the first year).
- Features: Includes all CLion features, such as intelligent coding assistance, code analysis, powerful debugger, dynamic analysis tools, and support for various project models (CMake, Makefile, Gradle).
Second Year Subscription
- Price: $179.34 per year, which includes a 20% continuity discount.
- Features: Same as the first year, with all CLion features and updates.
Third Year and Onwards Subscription
- Price: $134.26 per year, which includes a 40% continuity discount.
- Features: Same as the first year, with all CLion features and updates.
Lapsed Subscription Renewals
- Price: Available upon request. This option is for users whose subscriptions have lapsed and need to renew.
Perpetual Fallback License
- When purchasing an annual subscription, users receive a perpetual fallback license for the exact version of CLion available at the time of purchase. This allows them to use that specific version even after the subscription expires, although they will not receive further updates.
Free Trial
- CLion offers a free trial period, allowing users to test the full features of the IDE before committing to a purchase.
Personal (Individual) Licenses
- These licenses are for private individuals who purchase with their own funds and are not available through ComponentSource. They are priced at $8.90 per month for the first year.
Discounts and Special Programs
- JetBrains offers various discounts, such as continuity discounts for long-term users and a startup program that can provide up to a 50% discount for 5 years.
In summary, CLion’s pricing is based on annual subscriptions with discounts for continued use, and it includes a comprehensive set of features to support C and C development. There are no completely free versions of CLion for ongoing use, but a free trial is available.

CLion - Integration and Compatibility
CLion Overview
CLion, a cross-platform C/C Integrated Development Environment (IDE) from JetBrains, offers extensive integration with various tools and ensures compatibility across different platforms and devices. Here are some key aspects of its integration and compatibility:
Cross-Platform Compatibility
CLion is designed to work seamlessly on Linux, OS X, and Windows, making it a versatile choice for developers regardless of their operating system.
Integration with Version Control Systems
CLion provides unified support for most popular version control systems, including Subversion, Git, GitHub, Mercurial, CVS, and Perforce. This integration allows for smooth management of project versions directly within the IDE.
External Tools
CLion allows you to configure and run external tools, both locally and remotely over SSH. This feature enables you to integrate third-party command-line applications, such as scripts, code generators, analyzers, and database utilities, directly into your workflow. You can run these tools from the main menu, assign shortcuts, or execute them as part of specific run configurations.
Package Management
CLion integrates with vcpkg, a package manager for C/C , to help manage project dependencies and external libraries. This integration includes installing and updating vcpkg packages and suggesting quick-fixes for missing dependencies in your code and CMake scripts.
CMake and Build Systems
CLion works with various project models, including CMake, Makefile, Gradle, and compilation databases. It also supports the CMake language, which is essential for many C/C projects. For projects using PlatformIO, CLion can be configured to work with PlatformIO’s build system, although some manual configuration may be necessary due to current limitations.
Debugging and Development Tools
The IDE includes a powerful debugger with features like disassemble on demand, a reworked Attach to Process dialog, and actions to suspend or resume individual threads. It also supports unit testing frameworks such as Google Test, Boost.Test, Doctest, and Catch. Additionally, CLion offers on-chip debugging options for microcontrollers and supports various on-device debugging tools like Peripheral View for ARM devices and FreeRTOS thread view.
PlatformIO Integration
CLion can be integrated with PlatformIO through the official PlatformIO for CLion plugin. This plugin allows you to manage PlatformIO projects within CLion, although there are some known issues, such as the need for manual configuration of project profiles and the lack of automatic updates to CLion configuration based on changes in the `platformio.ini` file.
Multi-Language Support
While primarily focused on C and C , CLion also provides support for other languages, including Rust, Swift, Python, and popular web technologies like JavaScript, XML, HTML, and Markdown. This support is often extended through bundled and repository plugins.
Conclusion
In summary, CLion’s integration capabilities and cross-platform compatibility make it a highly versatile and efficient tool for C/C development, allowing developers to manage their projects seamlessly across different environments and tools.

CLion - Customer Support and Resources
Customer Support
Email/Help Desk
Chat Support
Contact Support Directly
Help | Contact Support
to create a direct request for the support team.Online Documentation and Resources
Online Help
F1
or click on a dialog or tool window to access the relevant help pages.Offline Documentation
Knowledge Base
Reporting Issues and Feedback
Issue Tracker
Feedback Form
Learning and Development Resources
Tips of the Day
Productivity Guide
IDE Features Trainer
Advanced Debugging Resources
Integrated Debugger
Remote Debugging
AI Assistant
AI-Powered Features
These resources and support options ensure that users of CLion have a comprehensive and supportive environment to help them in their C and C development projects.

CLion - Pros and Cons
Advantages of CLion
CLion, developed by JetBrains, offers several significant advantages that make it a powerful and efficient Integrated Development Environment (IDE) for C and C developers.
Intelligent Coding Assistance
CLion provides smart code completion, formatting, and code insight, which helps in reducing unnecessary typing and boosts productivity. It generates code for you, including getters/setters and more complicated templates.
Cross-Platform Support
CLion is compatible with Windows, macOS, and Linux, making it versatile for developers working on different operating systems.
Advanced Debugging Tools
The IDE features a powerful debugger and dynamic analysis tools, including integration with Google Test, Boost.Test, Doctest, and Catch for unit testing. It also supports remote debugging and on-chip debugging for microcontrollers.
CMake Support
CLion has smart CMake support, which includes code generation, completion, and automatic target updates, making project setup and management easier.
Version Control System (VCS) Integration
CLion offers a unified interface for popular VCS systems such as Git, GitHub, Subversion, Mercurial, CVS, and Perforce, along with local history to prevent data loss.
Static Code Analysis
The IDE performs static analysis for supported languages, highlighting warnings and errors immediately and suggesting quick fixes.
Customization
Users can select from default editor themes or customize them to match their preferences. CLion also supports Vim-emulation mode and various plugins to expand its functionality.
Disadvantages of CLion
While CLion is a highly capable IDE, it also has some drawbacks that users should be aware of.
Cost
CLion is a proprietary software with a significant cost, especially for business licenses, which can be $199 for the first year, and $89 for individual licenses.
Resource Intensive
Although generally lightweight, CLion can be resource-intensive, particularly when working on large projects or on low-memory systems. This can lead to occasional crashes and lag.
Learning Curve
For new programmers, CLion can be challenging to get started with due to its extensive feature set and advanced tools.
Limited External Support
As of now, JetBrains does not provide public mediums for physical engagements such as conferences or meetups to teach and train developers on CLion.
Language Support Limitation
CLion primarily focuses on C and C and does not support as wide a range of languages as some other IDEs, like Visual Studio.
Overall, CLion is a powerful tool for C and C developers, offering a rich set of features that enhance productivity and code quality, but it comes with some costs and limitations.

CLion - Comparison with Competitors
When Comparing CLion with Competitors
When comparing CLion, a powerful Integrated Development Environment (IDE) by JetBrains, with its competitors in the coding tools category, several key features and differences stand out.
Unique Features of CLion
- Smart Code Analysis and Completion: CLion is renowned for its intelligent code analysis and context-aware code completion. It provides real-time code analysis, identifying errors and offering quick fixes as you type, which significantly enhances productivity and code quality.
- Advanced Debugger: CLion includes a powerful debugger with dynamic analysis tools, making it easier to investigate and solve problems. It also supports various testing frameworks like Google Test, Boost Test, Doctest, and Catch.
- Cross-Platform Development: CLion supports development on Linux, macOS, and Windows, making it ideal for cross-platform projects. It also offers support for embedded development and IoT devices.
- CMake Support: CLion has strong integration with CMake, which is crucial for managing large and complex C projects.
Alternatives and Competitors
Visual Studio
Visual Studio is a comprehensive IDE that supports a wide range of programming languages, including C .
- Features: It offers advanced debugging tools, code completion, and integration with various version control systems. Visual Studio is particularly strong in Windows development but also supports cross-platform projects.
- Difference: Unlike CLion, Visual Studio is not specifically tailored for C development but is more versatile across different languages.
Code::Blocks
Code::Blocks is a free, open-source IDE primarily designed for C and Fortran development.
- Features: It is lightweight, highly customizable, and supports multiple compilers. Code::Blocks offers syntax highlighting, auto-completion, and a robust debugging tool.
- Difference: While Code::Blocks is free and lightweight, it lacks the advanced code analysis and integration with testing frameworks that CLion provides.
CodeLite
CodeLite is another free, open-source IDE that supports C , PHP, JavaScript, and other languages.
- Features: It includes an intuitive code editor with syntax highlighting, code refactoring, and auto-completion. CodeLite also supports Node.js development and TypeScript.
- Difference: CodeLite is highly customizable but may not offer the same level of advanced debugging and code analysis as CLion.
Qt Creator
Qt Creator is an IDE focused on Qt framework development but also supports C and other languages.
- Features: It includes visual editors for building widget-based apps and Qt Quick-based interfaces. Qt Creator supports cross-compiling and integrates with popular version control systems.
- Difference: Qt Creator is more specialized in Qt framework development, whereas CLion is more general-purpose for C development.
AI-Driven Coding Assistants
While CLion itself is not an AI-driven coding assistant, tools like GitHub Copilot can be integrated with CLion to enhance the development process.
- GitHub Copilot: This AI-powered coding assistant offers advanced code autocompletion, context-aware suggestions, and automated code documentation generation. It integrates seamlessly with popular IDEs, including those from JetBrains.
Conclusion
In summary, CLion stands out for its advanced code analysis, powerful debugging tools, and strong support for C and cross-platform development. However, depending on specific needs, alternatives like Visual Studio, Code::Blocks, CodeLite, and Qt Creator may offer different advantages, such as cost-effectiveness, lightweight design, or specialization in certain frameworks. For AI-driven coding assistance, tools like GitHub Copilot can complement CLion’s features to further enhance developer productivity.

CLion - Frequently Asked Questions
Frequently Asked Questions about CLion
Q: Is CLion a paid product?
CLion is a commercial product built on the IntelliJ Platform. It offers various licensing options, including free and paid ones. For example, students, teachers, and open-source projects may be eligible for free licenses, while other users will need to purchase a license.
Q: How do I install CLion?
To install CLion, you need to download the installer from the JetBrains website. Run the installer and follow the wizard steps. You will be prompted to choose the installation location, select installation options (such as creating a desktop shortcut and associating file extensions), and choose a start menu folder. After installation, you may need to activate your license using your JetBrains account credentials.
Q: What toolchains can I use with CLion on Windows?
On Windows, you have three toolchain options for CLion: Cygwin, MinGW, and the Microsoft Visual C compiler. Each of these toolchains can be configured to work with CLion, and you can choose the one that best fits your development needs.
Q: Does CLion support other build systems besides CMake?
Currently, CLion only supports CMake-based projects. However, there are plans to support other build systems in the future. You can import non-CMake projects using the Import Project functionality, but full support for other build systems is not yet available.
Q: Can I write plugins for CLion?
Yes, CLion is open to plugin development, just like other JetBrains IntelliJ-Platform-based products. You can find useful information on plugin development in the JetBrains confluence space. However, before version 1.0, the API may be unstable, and plugins may be broken occasionally.
Q: Why is typing or code completion slow in CLion?
If you experience slow typing or code completion, it could be due to various reasons. To help diagnose the issue, you may need to provide additional information such as a sample project and a CPU snapshot. This will help the support team identify the cause and suggest a solution.
Q: How do I activate the AI Assistant in CLion?
The AI Assistant is not enabled by default in CLion. To activate it, you need to install the AI Assistant plugin, acquire a JetBrains AI Service license, and give your explicit consent to the JetBrains AI Terms of Service and Acceptable Use Policy. You can log in to your JetBrains account and follow the prompts to activate the AI Assistant.
Q: Can I associate specific file extensions with CLion?
Yes, during the installation process, you can configure CLion to associate specific file extensions with the IDE. This allows you to open these files directly with CLion by double-clicking them. You can also add this association after installation through the settings.
Q: How do I run CLion after installation?
After installing CLion, you can run it from the Windows Start menu, use the desktop shortcut, or execute the launcher batch script or executable in the installation directory under the `bin` folder. On macOS, you can run CLion from the Applications directory, Launchpad, or Spotlight.
Q: What are the system requirements for running CLion?
While the specific system requirements are not detailed here, it is generally recommended to have a decent amount of RAM and a relatively modern processor to ensure smooth performance. For precise system requirements, you should refer to the official JetBrains documentation or the installation guide.
