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Redundant constructs

Condition of 'if' expression is constant  

Reports if expressions that have true or false constant literal condition and can be simplified.

Control flow with empty body  

Reports if, while, do or for statements with empty bodies.

Function with '= { ... }' and inferred return type  

Reports functions with = { ..

Redundant 'constructor' keyword  

Reports a redundant 'constructor' keyword on primary constructors.

Redundant 'return' keyword   New in this release

Reports redundant return keywords in expressions that appear as the last expression of an if or when branch when the entire if/when expression is itself returned.

Redundant 'return' label  

Reports redundant return labels outside of lambda expressions.

Redundant 'suspend' modifier  

Reports suspend modifier as redundant if no other suspending functions are called inside.

Redundant argument-based 'let' call  

Reports a redundant argument-based let call.

Redundant backticks  

Reports redundant backticks in references.

Redundant constructor body  

Reports empty bodies of secondary constructors.

Redundant curly braces in string template  

Reports usages of curly braces in string templates around simple identifiers.

Redundant double negation  

Reports redundant double negations.

Redundant empty initializer block  

Reports redundant empty initializer blocks.

Redundant enum constructor invocation  

Reports redundant constructor invocation on an enum entry.

Redundant escaped dollar characters in string literals   New in this release

Reports that escaped dollar characters in a string can be replaced with regular literals.

Redundant interpolation prefix  

Reports redundant dollar prefixes in string template expressions.

Redundant labeled return on the last expression in a lambda  

Reports labeled returns used on the last expressions in lambdas.

Redundant overriding method  

Reports redundant overriding declarations.

Redundant property getter  

Reports redundant property getters.

Redundant property setter  

Reports redundant property setters.

Redundant receiver-based 'let' call  

Reports redundant receiver-based let calls.

Redundant SAM constructor  

Reports SAM (Single Abstract Method) constructor usages which can be replaced with lambdas.

Redundant semicolon  

Reports redundant semicolons (;) that can be safely removed.

Redundant setter parameter type  

Reports explicitly specified parameter types in property setters.

Redundant upper bound 'Any?'   New in this release

Reports redundant explicit upper bound Any? on a type parameter.

Redundant value argument  

Reports arguments that are equal to the default values of the corresponding parameters.

Replace empty class body  

Reports declarations of classes and objects with an empty body.

Simplifiable 'when'  

Reports when expressions with the constant true or false branches.

Unnecessary parentheses in function call with lambda  

Reports redundant empty parentheses of function calls where the only parameter is a lambda that's outside the parentheses.

Unused import directive  

Reports redundant import statements.

Unused symbol   New in this release

Reports symbols that are not used or not reachable from entry points.

Unused variable  

This inspection reports variables that are not used.

Variable initializer is redundant   New in this release

Reports redundant initializers for local variables.

Last modified: 03 December 2025