Add BuildInference annotation onto stdlib coroutine builders

libraries/stdlib/common/build.gradle

@@ -71,6 +71,7 @@ compileCoroutinesKotlinCommon {
         freeCompilerArgs = [
                 "-module-name", project.name+"-coroutines",
                 "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
+                "-Xuse-experimental=kotlin.Experimental",
                 "-XXLanguage:-ReleaseCoroutines",
                 "-Xallow-kotlin-package",
                 "-Xallow-result-return-type"

libraries/stdlib/coroutines-experimental/src/kotlin/coroutines/experimental/SequenceBuilder.kt

@@ -5,11 +5,13 @@
 
 @file:kotlin.jvm.JvmMultifileClass
 @file:kotlin.jvm.JvmName("SequenceBuilderKt")
+@file:UseExperimental(ExperimentalTypeInference::class)
 
 package kotlin.coroutines.experimental
 
 import kotlin.*
 import kotlin.coroutines.experimental.intrinsics.*
+import kotlin.experimental.ExperimentalTypeInference
 
 /**
  * Builds a [Sequence] lazily yielding values one by one.
@@ -20,7 +22,7 @@ import kotlin.coroutines.experimental.intrinsics.*
  * @sample samples.collections.Sequences.Building.buildFibonacciSequence
  */
 @SinceKotlin("1.1")
-public fun <T> buildSequence(builderAction: suspend SequenceBuilder<T>.() -> Unit): Sequence<T> = Sequence { buildIterator(builderAction) }
+public fun <T> buildSequence(@BuilderInference builderAction: suspend SequenceBuilder<T>.() -> Unit): Sequence<T> = Sequence { buildIterator(builderAction) }
 
 /**
  * Builds an [Iterator] lazily yielding values one by one.
@@ -29,7 +31,7 @@ public fun <T> buildSequence(builderAction: suspend SequenceBuilder<T>.() -> Uni
  * @sample samples.collections.Iterables.Building.iterable
  */
 @SinceKotlin("1.1")
-public fun <T> buildIterator(builderAction: suspend SequenceBuilder<T>.() -> Unit): Iterator<T> {
+public fun <T> buildIterator(@BuilderInference builderAction: suspend SequenceBuilder<T>.() -> Unit): Iterator<T> {
     val iterator = SequenceBuilderIterator<T>()
     iterator.nextStep = builderAction.createCoroutineUnchecked(receiver = iterator, completion = iterator)
     return iterator

libraries/stdlib/coroutines/src/kotlin/sequences/SequenceBuilder.kt

@@ -5,12 +5,14 @@
 
 @file:kotlin.jvm.JvmMultifileClass
 @file:kotlin.jvm.JvmName("SequencesKt")
+@file:UseExperimental(ExperimentalTypeInference::class)
 
 package kotlin.sequences
 
 import kotlin.*
 import kotlin.coroutines.*
 import kotlin.coroutines.intrinsics.*
+import kotlin.experimental.ExperimentalTypeInference
 
 /**
  * Builds a [Sequence] lazily yielding values one by one.
@@ -21,12 +23,12 @@ import kotlin.coroutines.intrinsics.*
  * @sample samples.collections.Sequences.Building.buildFibonacciSequence
  */
 @SinceKotlin("1.3")
-public fun <T> sequence(block: suspend SequenceScope<T>.() -> Unit): Sequence<T> = Sequence { iterator(block) }
+public fun <T> sequence(@BuilderInference block: suspend SequenceScope<T>.() -> Unit): Sequence<T> = Sequence { iterator(block) }
 
 @SinceKotlin("1.3")
 @Deprecated("Use 'sequence { }' function instead.", ReplaceWith("sequence(builderAction)"), level = DeprecationLevel.ERROR)
 @kotlin.internal.InlineOnly
-public inline fun <T> buildSequence(noinline builderAction: suspend SequenceScope<T>.() -> Unit): Sequence<T> = Sequence { iterator(builderAction) }
+public inline fun <T> buildSequence(@BuilderInference noinline builderAction: suspend SequenceScope<T>.() -> Unit): Sequence<T> = Sequence { iterator(builderAction) }
 
 /**
  * Builds an [Iterator] lazily yielding values one by one.
@@ -35,7 +37,7 @@ public inline fun <T> buildSequence(noinline builderAction: suspend SequenceScop
  * @sample samples.collections.Iterables.Building.iterable
  */
 @SinceKotlin("1.3")
-public fun <T> iterator(block: suspend SequenceScope<T>.() -> Unit): Iterator<T> {
+public fun <T> iterator(@BuilderInference block: suspend SequenceScope<T>.() -> Unit): Iterator<T> {
     val iterator = SequenceBuilderIterator<T>()
     iterator.nextStep = block.createCoroutineUnintercepted(receiver = iterator, completion = iterator)
     return iterator
@@ -44,7 +46,7 @@ public fun <T> iterator(block: suspend SequenceScope<T>.() -> Unit): Iterator<T>
 @SinceKotlin("1.3")
 @Deprecated("Use 'iterator { }' function instead.", ReplaceWith("iterator(builderAction)"), level = DeprecationLevel.ERROR)
 @kotlin.internal.InlineOnly
-public inline fun <T> buildIterator(noinline builderAction: suspend SequenceScope<T>.() -> Unit): Iterator<T> = iterator(builderAction)
+public inline fun <T> buildIterator(@BuilderInference noinline builderAction: suspend SequenceScope<T>.() -> Unit): Iterator<T> = iterator(builderAction)
 
 /**
  * The scope for yielding values of a [Sequence] or an [Iterator], provides [yield] and [yieldAll] suspension functions.

libraries/stdlib/js/build.gradle

@@ -184,6 +184,7 @@ compileCoroutinesKotlin2Js {
         sourceMapPrefix = "./"
         freeCompilerArgs += [
             "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
+            "-Xuse-experimental=kotlin.Experimental",
             "-XXLanguage:-ReleaseCoroutines"
         ]
     }

libraries/stdlib/jvm/build.gradle

@@ -192,6 +192,7 @@ compileCoroutinesKotlin {
                 "-Xallow-result-return-type",
                 "-Xmultifile-parts-inherit",
                 "-Xuse-experimental=kotlin.contracts.ExperimentalContracts",
+                "-Xuse-experimental=kotlin.Experimental",
                 "-XXLanguage:-ReleaseCoroutines",
                 "-module-name", "kotlin-stdlib-coroutines"
         ]