File size and length limits
File size limits in IDE properties
For performance and memory consumption reasons, CLion sets the following file size limits:
The maximum size for files that CLion is able to open, is controlled by the
idea.max.content.load.filesizeIDE property. The default value is20000kilobytes.The maximum size for files where CLion enables coding assistance and design-time code inspection, is controlled by the
idea.max.intellisense.filesizeproperty. The default value is2500kilobytes.
Change the file size limits in IDE properties
Do one of the following:
Select from the main menu.
On the Welcome screen, click Configure and then select Edit Custom Properties.
If you cannot start CLion, you can manually create an empty idea.properties file in the CLion configuration directory.
In the custom idea.properties file that opens in a new editor tab, specify the desired values in kilobytes, for example:
idea.max.intellisense.filesize=3500The properties you add to this file override the corresponding default properties.
File length limit
By default, the maximum C/C++ source/header file length in CLion is limited to 500 000 characters. If that limit is exceeded, all the code insight features, such as code completion and syntax highlighting are disabled. In this case the IDE notifies you about the current configured limit and the actual file length.
Change the file length limit in the Maximum File Length dialog
Click the link in the upper right corner of the IDE notification:
In the dialog that opens, specify the file length limit and click OK to proceed:
Change the file length limit in the Registry
Press Control+Shift+A or choose from the main menu. In the popup that opens, start typing
Registry, select the corresponding item and press Enter.
In the dialog that opens, start typing cidr.max.intellisense.file.length. Specify the desired file size limit in the Value field. Click Close to proceed.
Invalidate project symbols manually by calling .