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Why you should care

[/vc_column_text][vc_column_text]Prefer using an expression body for functions with the body consisting of a single expression.[/vc_column_text][vc_empty_space][/vc_column_inner][/vc_row_inner][vc_empty_space height=”12px”][vc_empty_space][vc_separator][vc_column_text]

How we detect

[/vc_column_text][vc_column_text]CAST Highlight counts one occurrence each time a function consisting of a single instruction is using a body implementation (instructions enclosed between accolades).

fun foo(): Int {     // +1 VIOLATION
    return 1 
}
 
fun foo() = 1        // +0 good
 
fun foo(): Int {     // +0  because instruction is a "if" statement
   if (toto) {
       return 1
    }
}
 
fun foo(): Int {     // +0  because instruction is a "if" statement
   if (toto) {
       return 1
    }
}
 
// +0 because the instruction is written over at least 5 lines.
public inline fun <T, K> Iterable<T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {
    return object : Grouping<T, K> {
        override fun sourceIterator(): Iterator<T> = this@groupingBy.iterator()
        override fun keyOf1(element: T): K = keySelector(element1)
        override fun keyOf2(element: T): K = keySelector(element2)
    }
}

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References

[/vc_column_text][vc_column_text]https://kotlinlang.org/docs/coding-conventions.html#function-formatting[/vc_column_text][vc_empty_space][vc_row_inner][vc_column_inner][vc_single_image image=”5362″ img_size=”full”][vc_column_text]

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