Files
kotlin-fork/compiler/testData/diagnostics/tests/Underscore.kt
T
Dmitry Petrov df6d4f358a KT-22274 report warning on labels that can't be referenced
Labels are meaningful only if they can be referenced by 'break',
'continue', or 'return' expressions.
2018-07-25 12:08:20 +03:00

47 lines
2.0 KiB
Kotlin
Vendored

// !DIAGNOSTICS: -DEPRECATION -TOPLEVEL_TYPEALIASES_ONLY
<!UNDERSCORE_IS_RESERVED!>import kotlin.Deprecated as ___<!>
@___("") data class Pair(val x: Int, val y: Int)
class <!UNDERSCORE_IS_RESERVED!>_<!><<!UNDERSCORE_IS_RESERVED!>________<!>>
val <!UNDERSCORE_IS_RESERVED!>______<!> = <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>_<!><Int>()
fun <!UNDERSCORE_IS_RESERVED!>__<!>(<!UNDERSCORE_IS_RESERVED!>___<!>: Int, y: <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>_<!><Int>?): Int {
val (_, <!UNUSED_VARIABLE!>z<!>) = Pair(<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>___<!> - 1, 42)
val (x, <!UNDERSCORE_IS_RESERVED!>__________<!>) = Pair(<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>___<!> - 1, 42)
val <!UNDERSCORE_IS_RESERVED!>____<!> = x
// in backquotes: allowed
val `_` = <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__________<!>
val q = fun(_: Int, <!UNDERSCORE_IS_RESERVED, UNUSED_ANONYMOUS_PARAMETER!>__<!>: Int) {}
q(1, 2)
val <!UNDERSCORE_IS_RESERVED!>_<!> = 56
fun localFun(<!UNDERSCORE_IS_RESERVED!>_<!>: String) = 1
<!REDUNDANT_LABEL_WARNING!><!UNDERSCORE_IS_RESERVED!>__<!>@<!> return if (y != null) <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!>(<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>____<!>, y) else <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!>(`_`, <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>______<!>)
}
class A1(val <!UNDERSCORE_IS_RESERVED, UNDERSCORE_IS_RESERVED!>_<!>: String)
class A2(<!UNDERSCORE_IS_RESERVED!>_<!>: String) {
class B {
typealias <!UNDERSCORE_IS_RESERVED!>_<!> = CharSequence
}
val <!UNDERSCORE_IS_RESERVED!>_<!>: Int = 1
fun <!UNDERSCORE_IS_RESERVED!>_<!>() {}
fun foo(<!UNDERSCORE_IS_RESERVED!>_<!>: Double) {}
}
// one underscore parameters for named function are still prohibited
fun oneUnderscore(<!UNDERSCORE_IS_RESERVED!>_<!>: Int) {}
fun doIt(f: (Any?) -> Any?) = f(null)
val something = doIt { <!UNDERSCORE_IS_RESERVED!>__<!> -> <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!> }
val something2 = doIt { _ -> 1 }