Rename !USE_EXPERIMENTAL test directive to !OPT_IN

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/bad/returnsImplies/notNull.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/bad/returnsImplies/propertyGetter.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/returnsImplies/conditionLogic.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/returnsImplies/inapplicable.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/returnsImplies/notNull.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/returnsImplies/safeCall.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/fir/analysis-tests/testData/resolveWithStdlib/contracts/fromSource/good/returnsImplies/trickyCases.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 import kotlin.contracts.*
 
 @OptIn(ExperimentalContracts::class)

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/builders/LanguageVersionSettingsBuilder.kt

@@ -63,7 +63,7 @@ class LanguageVersionSettingsBuilder {
         }
 
         val analysisFlags = listOfNotNull(
-            analysisFlag(AnalysisFlags.useExperimental, directives[LanguageSettingsDirectives.USE_EXPERIMENTAL].takeIf { it.isNotEmpty() }),
+            analysisFlag(AnalysisFlags.useExperimental, directives[LanguageSettingsDirectives.OPT_IN].takeIf { it.isNotEmpty() }),
             analysisFlag(AnalysisFlags.ignoreDataFlowInAssert, trueOrNull(LanguageSettingsDirectives.IGNORE_DATA_FLOW_IN_ASSERT in directives)),
             analysisFlag(AnalysisFlags.constraintSystemForOverloadResolution, directives.singleOrZeroValue(LanguageSettingsDirectives.CONSTRAINT_SYSTEM_FOR_OVERLOAD_RESOLUTION)),
             analysisFlag(AnalysisFlags.allowResultReturnType, trueOrNull(LanguageSettingsDirectives.ALLOW_RESULT_RETURN_TYPE in directives)),

compiler/test-infrastructure/tests/org/jetbrains/kotlin/test/directives/LanguageSettingsDirectives.kt

@@ -27,7 +27,7 @@ object LanguageSettingsDirectives : SimpleDirectivesContainer() {
     )
     // --------------------- Analysis Flags ---------------------
 
-    val USE_EXPERIMENTAL by stringDirective(
+    val OPT_IN by stringDirective(
         description = "List of opted in annotations (AnalysisFlags.useExperimental)"
     )
 

compiler/testData/cfgVariablesWithStdLib/contracts/breakContinuesInInlinedLambda.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.internal.ContractsDsl
+// !OPT_IN: kotlin.internal.ContractsDsl
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/inlinedLambdaAlwaysThrows.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/irrelevantUnknownClosure.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/nestedTryCatchFinally.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/nestedTryCatchs.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/nonReturningInlinedLambda.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/returnsAndCalls.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.internal.ContractsDsl
+// !OPT_IN: kotlin.internal.ContractsDsl
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/throwIfNotCalled.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/tryCatch.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgVariablesWithStdLib/contracts/tryCatchFinally.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/labeledReturns.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/nonReturningInlinedLambda.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/returnsAndCalls.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect +UseReturnsEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/safeCallAndInPlaceReturn.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/throwIfNotCalled.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/cfgWithStdLib/contracts/tryCatchFinally.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 
 import kotlin.contracts.*
 

compiler/testData/codegen/box/compileKotlinAgainstKotlin/optionalAnnotation.kt

@@ -1,6 +1,6 @@
 // IGNORE_BACKEND_FIR: JVM_IR
 // !LANGUAGE: +MultiPlatformProjects
-// !USE_EXPERIMENTAL: kotlin.ExperimentalMultiplatform
+// !OPT_IN: kotlin.ExperimentalMultiplatform
 // TARGET_BACKEND: JVM
 // FULL_JDK
 // WITH_STDLIB

compiler/testData/codegen/box/contracts/constructorArgument.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 import kotlin.contracts.*

compiler/testData/codegen/box/contracts/destructuredVariable.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE, JS
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/exactlyOnceNotInline.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 import kotlin.contracts.*

compiler/testData/codegen/box/contracts/exception.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 

compiler/testData/codegen/box/contracts/fieldInConstructorParens.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/fieldReadInConstructor.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/forLoop.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/functionParameter.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 import kotlin.contracts.*

compiler/testData/codegen/box/contracts/kt47168.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 import kotlin.contracts.*
 

compiler/testData/codegen/box/contracts/lambdaParameter.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/listAppend.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/contracts/nestedLambdaInNonInlineCallExactlyOnce.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: JVM
 // WITH_RUNTIME
 // KT-38849

compiler/testData/codegen/box/contracts/valInWhen.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 

compiler/testData/codegen/box/inference/kt35684.kt

@@ -1,7 +1,7 @@
 // DONT_TARGET_EXACT_BACKEND: WASM
 // WASM_MUTE_REASON: COROUTINES
 // !LANGUAGE: +NewInference
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 // WITH_RUNTIME
 
 // ISSUE: KT-35684

compiler/testData/codegen/box/multiplatform/optionalExpectation.kt

@@ -1,6 +1,6 @@
 // IGNORE_BACKEND_FIR: JVM_IR
 // !LANGUAGE: +MultiPlatformProjects
-// !USE_EXPERIMENTAL: kotlin.ExperimentalMultiplatform
+// !OPT_IN: kotlin.ExperimentalMultiplatform
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // MODULE: library

compiler/testData/codegen/box/multiplatform/optionalExpectationJvm.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +MultiPlatformProjects
-// !USE_EXPERIMENTAL: kotlin.ExperimentalMultiplatform
+// !OPT_IN: kotlin.ExperimentalMultiplatform
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FILE: common.kt

compiler/testData/codegen/box/reflection/annotations/findAnnotation.kt

@@ -1,7 +1,7 @@
 // IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JS_IR_ES6
 // IGNORE_BACKEND: JS, NATIVE
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // WITH_REFLECT
 
 import kotlin.reflect.full.findAnnotation

compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/annotations/repeatable/javaAnnotation.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK

compiler/testData/codegen/box/reflection/annotations/repeatable/jvmRepeatableKotlinAnnotation.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK

compiler/testData/codegen/box/reflection/annotations/repeatable/kotlinAnnotation.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK

compiler/testData/codegen/box/reflection/annotations/repeatable/nonRepeatedAnnotationWithItsContainer.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +RepeatableAnnotations
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM_IR
 // JVM_TARGET: 1.8
 // FULL_JDK

compiler/testData/codegen/box/reflection/isInstance/isInstanceCastAndSafeCast.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 

compiler/testData/codegen/box/reflection/lambdaClasses/parameterNamesAndNullability.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnDefaultWithInlineClassArgument.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInArrayConstructor.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInConstructor.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInField.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInStaticField.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInSuspend.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 // WITH_COROUTINES

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInSuspendLambda.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 // WITH_COROUTINES

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnSuspendLambdaInField.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
+// !OPT_IN: kotlin.reflect.jvm.ExperimentalReflectionOnLambdas
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/typeOf/flexibleTypes_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 // FILE: box.kt

compiler/testData/codegen/box/reflection/typeOf/js/classes.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/js/inlineClasses.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/js/kType.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/js/manyTypeArguments.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/js/multipleLayers.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/js/multipleModules.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JS
 // WITH_REFLECT
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/mutableCollections_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 

compiler/testData/codegen/box/reflection/typeOf/noReflect/flexibleTypes_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FILE: box.kt

compiler/testData/codegen/box/reflection/typeOf/noReflect/mutableCollections_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 

compiler/testData/codegen/box/reflection/typeOf/noReflect/nothing_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FILE: box.kt

compiler/testData/codegen/box/reflection/typeOf/noReflect/rawTypes_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // IGNORE_BACKEND_FIR: JVM_IR
 // WITH_RUNTIME

compiler/testData/codegen/box/reflection/typeOf/nothing_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // WITH_REFLECT
 // FILE: box.kt

compiler/testData/codegen/box/reflection/typeOf/rawTypes_before.kt

@@ -1,5 +1,5 @@
 // !API_VERSION: 1.5
-// !USE_EXPERIMENTAL: kotlin.ExperimentalStdlibApi
+// !OPT_IN: kotlin.ExperimentalStdlibApi
 // TARGET_BACKEND: JVM
 // IGNORE_BACKEND_FIR: JVM_IR
 // WITH_REFLECT

compiler/testData/codegen/boxInline/contracts/cfgDependendValInitialization.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/complexInitializer.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/complexInitializerWithStackTransformation.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/crossinlineCallableReference.kt

@@ -1,5 +1,5 @@
 // IGNORE_FIR_DIAGNOSTICS
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // NO_CHECK_LAMBDA_INLINING
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/definiteLongValInitialization.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/definiteNestedValInitialization.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/definiteValInitInInitializer.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // NO_CHECK_LAMBDA_INLINING
 

compiler/testData/codegen/boxInline/contracts/definiteValInitialization.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/exactlyOnceCrossinline.kt

@@ -1,5 +1,5 @@
 // IGNORE_FIR_DIAGNOSTICS
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/exactlyOnceCrossinline2.kt

@@ -1,5 +1,5 @@
 // IGNORE_FIR_DIAGNOSTICS
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // FILE: 1.kt
 package test

compiler/testData/codegen/boxInline/contracts/exactlyOnceNoinline.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // NO_CHECK_LAMBDA_INLINING
 

compiler/testData/codegen/boxInline/contracts/nonLocalReturn.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/nonLocalReturnWithCycle.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 // WITH_RUNTIME
 // KJS_WITH_FULL_RUNTIME

compiler/testData/codegen/boxInline/contracts/propertyInitialization.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/boxInline/contracts/valInitializationAndUsageInNestedLambda.kt

@@ -1,5 +1,5 @@
 // NO_CHECK_LAMBDA_INLINING
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // IGNORE_BACKEND: NATIVE
 
 // FILE: 1.kt

compiler/testData/codegen/bytecodeListing/multiplatform/optionalExpectation.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +MultiPlatformProjects +UseGetterNameForPropertyAnnotationsMethodOnJvm
-// !USE_EXPERIMENTAL: kotlin.ExperimentalMultiplatform
+// !OPT_IN: kotlin.ExperimentalMultiplatform
 // TARGET_BACKEND: JVM
 // WITH_RUNTIME
 

compiler/testData/diagnostics/tests/controlFlowAnalysis/fieldInitialization.fir.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.internal.ContractsDsl
+// !OPT_IN: kotlin.internal.ContractsDsl
 
 import kotlin.contracts.*
 

compiler/testData/diagnostics/tests/controlFlowAnalysis/fieldInitialization.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.internal.ContractsDsl
+// !OPT_IN: kotlin.internal.ContractsDsl
 
 import kotlin.contracts.*
 

compiler/testData/diagnostics/testsWithJsStdLib/export/extendingNonExportedType.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !RENDER_DIAGNOSTICS_MESSAGES
 
 package foo

compiler/testData/diagnostics/testsWithJsStdLib/export/jsExportOnNestedDeclarations.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 
 package foo
 

compiler/testData/diagnostics/testsWithJsStdLib/export/secondaryConstructorWithoutJsName.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !RENDER_DIAGNOSTICS_MESSAGES
 
 package foo

compiler/testData/diagnostics/testsWithJsStdLib/export/unexportableTypesInSignature.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !RENDER_DIAGNOSTICS_MESSAGES
 

compiler/testData/diagnostics/testsWithJsStdLib/export/unexportableTypesInTypeParameters.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // !RENDER_DIAGNOSTICS_MESSAGES
 

compiler/testData/diagnostics/testsWithJsStdLib/export/wrongExportedDeclaration.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !RENDER_DIAGNOSTICS_MESSAGES
 // !DIAGNOSTICS: -INLINE_CLASS_DEPRECATED
 

compiler/testData/diagnostics/testsWithJsStdLib/export/wrongExportedDeclarationInExportedFile.kt

@@ -1,4 +1,4 @@
-// !USE_EXPERIMENTAL: kotlin.js.ExperimentalJsExport
+// !OPT_IN: kotlin.js.ExperimentalJsExport
 // !RENDER_DIAGNOSTICS_MESSAGES
 
 @file:JsExport

compiler/testData/diagnostics/testsWithStdLib/builderInference/incorrectCalls.kt

@@ -1,6 +1,6 @@
 // FIR_IDENTICAL
 // !LANGUAGE: +UnrestrictedBuilderInference
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 @file:OptIn(ExperimentalTypeInference::class)

compiler/testData/diagnostics/testsWithStdLib/builderInference/incorrectCallsWithRestrictions.kt

@@ -1,5 +1,5 @@
 // FIR_IDENTICAL
-// !USE_EXPERIMENTAL: kotlin.RequiresOptIn
+// !OPT_IN: kotlin.RequiresOptIn
 // !DIAGNOSTICS: -UNUSED_EXPRESSION -UNUSED_PARAMETER -UNUSED_VARIABLE
 
 @file:OptIn(ExperimentalTypeInference::class)

compiler/testData/diagnostics/testsWithStdLib/contracts/controlflow/flowInlining/breakContinuesInInlinedLambda.fir.kt

@@ -1,5 +1,5 @@
 // !LANGUAGE: +AllowContractsForCustomFunctions +UseCallsInPlaceEffect
-// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !OPT_IN: kotlin.contracts.ExperimentalContracts
 // !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
 
 import kotlin.contracts.*