Require "-Xuse-experimental=kotlin.Experimental" on usages of Experimental

Since we're not yet sure of the design of Experimental/UseExperimental,
we're making them "experimental" themselves in some sense, in that the
user is required to provide the magic argument
"-Xuse-experimental=kotlin.Experimental" to be allowed to use either
Experimental or UseExperimental. This is more convenient than the
previous approach of "-language-version 1.3
-Xskip-metadata-version-check" because it's simpler and does not cause
pre-release binaries to be produced

compiler/testData/diagnostics/testsWithStdLib/experimental/annotation.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // FILE: api.kt
 

compiler/testData/diagnostics/testsWithStdLib/experimental/bodyUsages.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/classMembers.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/classMembersOverlyExperimental.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/constVal.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/deeplyNestedClass.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/errors.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/experimentalIsNotEnabled.kt

@@ -0,0 +1,23 @@
+// FILE: api.kt
+
+@<!EXPERIMENTAL_IS_NOT_ENABLED!>Experimental<!>
+annotation class Marker
+
+@Marker
+fun f() {}
+
+// FILE: usage.kt
+
+fun use1() {
+    <!EXPERIMENTAL_API_USAGE_ERROR!>f<!>()
+}
+
+@Marker
+fun use2() {
+    f()
+}
+
+@<!EXPERIMENTAL_IS_NOT_ENABLED!>UseExperimental<!>(Marker::class)
+fun use3() {
+    f()
+}

compiler/testData/diagnostics/testsWithStdLib/experimental/experimentalIsNotEnabled.txt

@@ -0,0 +1,13 @@
+package
+
+@Marker public fun f(): kotlin.Unit
+public fun use1(): kotlin.Unit
+@Marker public fun use2(): kotlin.Unit
+@kotlin.UseExperimental(markerClass = {Marker::class}) public fun use3(): kotlin.Unit
+
+@kotlin.Experimental public final annotation class Marker : kotlin.Annotation {
+    public constructor Marker()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/testsWithStdLib/experimental/experimentalOnWholeModule.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // !EXPERIMENTAL: api.ExperimentalAPI
 // MODULE: api
 // FILE: api.kt

compiler/testData/diagnostics/testsWithStdLib/experimental/incorrectTargetsForExperimentalAnnotation.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/incorrectUseExperimental.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 
 <!USE_EXPERIMENTAL_WITHOUT_ARGUMENTS!>@UseExperimental<!>
 fun f1() {}

compiler/testData/diagnostics/testsWithStdLib/experimental/override.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/overrideDifferentExperimentalities.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 
 @Experimental(Experimental.Level.WARNING)
 annotation class E1

compiler/testData/diagnostics/testsWithStdLib/experimental/scripts.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // FILE: api.kt
 

compiler/testData/diagnostics/testsWithStdLib/experimental/topLevel.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 // FILE: api.kt
 

compiler/testData/diagnostics/testsWithStdLib/experimental/typealias.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/useExperimentalOnFile.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/useExperimentalOnFileWithVeryExperimentalMarker.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api

compiler/testData/diagnostics/testsWithStdLib/experimental/useExperimentalOnWholeModule.kt

@@ -1,5 +1,4 @@
-// !API_VERSION: 1.3
-// !USE_EXPERIMENTAL: api.ExperimentalAPI
+// !USE_EXPERIMENTAL: kotlin.Experimental api.ExperimentalAPI
 // MODULE: api
 // FILE: api.kt
 

compiler/testData/diagnostics/testsWithStdLib/experimental/useExperimentalTargets.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 // FILE: api.kt
 

compiler/testData/diagnostics/testsWithStdLib/experimental/useExperimentalWithSeveralAnnotations.kt

@@ -1,4 +1,4 @@
-// !API_VERSION: 1.3
+// !USE_EXPERIMENTAL: kotlin.Experimental
 // FILE: api.kt
 
 package api