Constructor parameter is never used as a property

Reports primary constructor parameters that can have val or var removed.

Class properties declared in the constructor increase memory consumption. If the parameter value is only used in the constructor, you can omit them.

Note that the referenced object might be garbage-collected earlier.

Example:

  class Task(val name: String) {
      init {
          print("Task created: $name")
      }
  }

The quick-fix removes the extra val or var keyword:

  class Task(name: String) {
      init {
          print("Task created: $name")
      }
  }

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.

CanBeParameter

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 CanBeParameter

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