Common stdlib

- adds actual matching expect declarations
- removes duplicates
- rewrite collections
- add MPP and experimental compiler options

backend.native/build.gradle

@@ -182,6 +182,9 @@ targetList.each { target ->
         args = [*konanArgs,
                 '-output', project(':runtime').file("build/${target}Stdlib"),
                 '-produce', 'library', '-module_name', 'stdlib',
+                '-Xmulti-platform', '-Xuse-experimental=kotlin.Experimental',
+                rootProject.file('libraries/generated'),
+                rootProject.file('libraries'),
                 project(':Interop:Runtime').file('src/main/kotlin'),
                 project(':Interop:Runtime').file('src/native/kotlin'),
                 project(':Interop:JsRuntime').file('src/main/kotlin'),
@@ -190,6 +193,8 @@ targetList.each { target ->
         inputs.dir(project(':Interop:Runtime').file('src/main/kotlin'))
         inputs.dir(project(':Interop:Runtime').file('src/native/kotlin'))
         inputs.dir(project(':Interop:JsRuntime').file('src/main/kotlin'))
+        inputs.dir(rootProject.file('libraries/generated'))
+        inputs.dir(rootProject.file('libraries/kotlin'))
         outputs.dir(project(':runtime').file("build/${target}Stdlib"))
 
         dependsOn ":runtime:${target}Runtime"

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/ir/Ir.kt

@@ -219,8 +219,20 @@ internal class KonanSymbols(context: Context, val symbolTable: SymbolTable): Sym
     val getProgressionLast = context.getInternalFunctions("getProgressionLast")
             .map { Pair(it.returnType, symbolTable.referenceSimpleFunction(it)) }.toMap()
 
-    val arrayContentToString = arrayTypes.associateBy({ it }, { arrayExtensionFun(it, "contentToString") })
-    val arrayContentHashCode = arrayTypes.associateBy({ it }, { arrayExtensionFun(it, "contentHashCode") })
+    val arrayContentToString = arrayTypes.associateBy({ it }, { findArrayExtension(it, "contentToString") })
+    val arrayContentHashCode = arrayTypes.associateBy({ it }, { findArrayExtension(it, "contentHashCode") })
+
+    fun findArrayExtension(type: KotlinType, name: String): IrSimpleFunctionSymbol {
+        val descriptor = builtInsPackage("kotlin", "collections")
+                .getContributedFunctions(Name.identifier(name), NoLookupLocation.FROM_BACKEND)
+                .singleOrNull {
+                    it.valueParameters.isEmpty()
+                            && (it.extensionReceiverParameter?.type?.constructor?.declarationDescriptor as? ClassDescriptor)?.defaultType == type
+                            && it.isActual
+                }
+                ?: throw Error(type.toString())
+        return symbolTable.referenceSimpleFunction(descriptor)
+    }
 
     override val copyRangeTo = arrays.map { symbol ->
         val packageViewDescriptor = builtIns.builtInsModule.getPackage(KotlinBuiltIns.COLLECTIONS_PACKAGE_FQ_NAME)

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/LateinitLowering.kt

@@ -51,7 +51,9 @@ internal class LateinitLowering(
     private val kotlinPackageScope              = context.ir.irModule.descriptor.getPackage(KOTLIN_FQ_NAME).memberScope
     private val isInitializedPropertyDescriptor = kotlinPackageScope
             .getContributedVariables(Name.identifier("isInitialized"), NoLookupLocation.FROM_BACKEND).single {
-                it.extensionReceiverParameter.let { it != null && TypeUtils.getClassDescriptor(it.type) == context.reflectionTypes.kProperty0 }
+                it.extensionReceiverParameter.let {
+                    it != null && TypeUtils.getClassDescriptor(it.type) == context.reflectionTypes.kProperty0
+                } && it.isActual
             }
     private val isInitializedGetterDescriptor   = isInitializedPropertyDescriptor.getter!!
 

backend.native/tests/runtime/text/string_builder0.kt

@@ -170,10 +170,10 @@ fun testReverse() {
     assertTrue(builder === builder.reverse())
     assertEquals(builder, "654321")
 
-    builder.length = 1
+    builder.setLength(1)
     assertEquals(builder, "6")
 
-    builder.length = 0
+    builder.setLength(0)
     assertEquals(builder, "")
 
     var str: String = "a"
@@ -261,7 +261,7 @@ fun testBasic() {
     assertEquals(19, sb.length)
     assertEquals("1, true12345678null", sb.toString())
 
-    sb.length = 0
+    sb.setLength(0)
     assertEquals(0, sb.length)
     assertEquals("", sb.toString())
 }

backend.native/tests/stdlib_external/text/harmony_regex/PatternTest2.kt

@@ -965,7 +965,7 @@ class PatternTest2 {
         assertEquals(4, result!!.range.start)
 
         // modify text
-        text.length = 0
+        text.setLength(0)
         text.append("Text have been changed.")
 
         assertNull(regex.find(text))