Property is explicitly assigned to constructor parameter

Reports properties that are explicitly assigned to primary constructor parameters.

Properties can be declared directly in the primary constructor, reducing the amount of code and increasing code readability.

Example:

  class User(name: String) {
      val name = name
  }

The quick-fix joins the parameter and property declaration into a primary constructor parameter:

  class User(val name: String) {
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

CanBePrimaryConstructorProperty

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Redundant constructs

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection CanBePrimaryConstructorProperty

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025