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Unnecessary type argument

Reports function calls with type arguments that can be automatically inferred. Such type arguments are redundant and can be safely omitted.

Use the 'Remove explicit type arguments' quick-fix to clean up the code.


// 'String' type can be inferred here fun foo(): MutableList<String> = mutableListOf<String>() // Here 'String' cannot be inferred, type argument is required. fun bar() = mutableListOf<String>()

After the quick-fix is applied:

fun foo(): MutableList<String> = mutableListOf() <== Updated fun bar() = mutableListOf<String>()

Locating this inspection


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

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


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