Unnecessary supertype qualification

Reports super member calls with redundant supertype qualification.

Code in a derived class can call its superclass functions and property accessors implementations using the super keyword. To specify the supertype from which the inherited implementation is taken, super can be qualified by the supertype name in angle brackets, e.g. super<Base>. Sometimes this qualification is redundant and can be omitted. Use the 'Remove explicit supertype qualification' quick-fix to clean up the code.

Examples:

  open class B {
      open fun foo(){}
  }

  class A : B() {
      override fun foo() {
         super<B>.foo() // <== redundant because 'B' is the only supertype
      }
  }

  interface I {
      fun foo() {}
  }

  class C : B(), I {
      override fun foo() {
          super<B>.foo() // <== here <B> qualifier is needed to distinguish 'B.foo()' from 'I.foo()'
      }
  }

After the quick-fix is applied:

  open class B {
      open fun foo(){}
  }

  class A : B() {
      override fun foo() {
         super.foo() // <== Updated
      }
  }

  interface I {
      fun foo() {}
  }

  class C : B(), I {
      override fun foo() {
          super<B>.foo()
      }
  }

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.

RemoveExplicitSuperQualifier

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

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Kotlin, 241.18072-IJ

Last modified: 18 June 2024