Скачать или смотреть Fixing the IntelliSense Issue: Why Visual Studio 2019 Doesn't Display All Class Methods

Learn how to troubleshoot the `IntelliSense` issue in Visual Studio 2019 where not all class methods are displayed in the context menu.
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Resolving IntelliSense Issues in Visual Studio 2019

If you are a C+ + developer using Visual Studio 2019, you might have encountered an issue where the complete list of methods for a class is not being displayed in the context menu. This is particularly frustrating when you expect to see all available methods after calling the . or -> operator on a class object. In this guide, we’ll delve into the possible reasons behind this problem and outline actionable solutions to help you get back on track.

Understanding the Problem

After updating to Visual Studio 2019, several users have noted that certain methods (like get() for std::shared_ptr) don't appear in the IntelliSense context menu. This can cause confusion and disrupt your coding process when you have to manually type method names instead of selecting them from an auto-complete list.

Why Does IntelliSense Fail to Show All Methods?

There are several factors that may contribute to IntelliSense not functioning correctly. Understanding these can help you troubleshoot the issue more effectively:

1. Compile Errors

Pre-existing Errors: If your code has existing compilation errors (e.g., missing semicolons, unmatched braces), it can impact IntelliSense’s performance. Make sure your code compiles successfully without any errors before relying on auto-completion features.

2. Intellisense Database Lag

Large Solutions: When working with large solutions or after making numerous changes, it can take time for Visual Studio to update the IntelliSense database. Be patient; this might resolve itself after a brief period.

3. Report the Problem

Persistent Issues: If this problem is recurring, consider creating a minimal project that replicates the issue. Use the “Report Problem” tool in Visual Studio to report your findings to Microsoft. Engaging with them can help improve the platform.

4. Missing Header Files

Include Necessary Headers: Ensure you have explicitly included all necessary headers in your source files. Sometimes, a missing header can lead to incomplete IntelliSense suggestions.

Additional Insights

Working Example: Although std::shared_ptr might not show the get() method, other classes like std::unique_ptr do not exhibit this problem. This inconsistency could be related to how these pointers are defined and utilized in the code.

Incomplete Types: If the class you are working with is an incomplete type, IntelliSense will not function correctly. Always ensure that the target class is fully defined to leverage the benefits of the IntelliSense tool.

Limitations of IntelliSense: Currently, some functions, such as std::make_unique, are limited in their support. IntelliSense tends to look only at top-level declarations, which can inhibit its ability to recognize certain available constructors or methods.

Conclusion

In summary, running into IntelliSense issues is a common frustration for Visual Studio 2019 users, especially in complex C+ + projects. By ensuring your code compiles without errors, waiting for the IntelliSense database to update, and properly including necessary headers, you can often resolve these issues. If the problem persists, don’t hesitate to report it to Microsoft, as user feedback is crucial for software enhancement.

By understanding these potential pitfalls and solutions, you can make your coding experience in Visual Studio smoother and more efficient. Happy coding!