[Wasm] Rename JsHandle to JsReference

Decision to do this was made at Kotlin/Wasm interop design meeting

compiler/testData/codegen/boxWasmJsInterop/functionTypes.kt

@@ -98,7 +98,7 @@ external fun is123Array(x: EI): Boolean
 external fun create123Array(): EI
 
 data class DC(val x: Int, val y: Int)
-typealias JSDC = JsHandle<DC>
+typealias JSDC = JsReference<DC>
 
 external fun extenalWithLambda(
     x: (Boolean, Byte, Short, Char, Int, Long, Float, Double, String, EI, JSDC) -> Unit,
@@ -179,7 +179,7 @@ fun box(): String {
             test(string == "S")
             test(is123Array(ei))
             test(dc.x == 100 && dc.y == 200)
-         }, DC(100, 200).toJsHandle())
+         }, DC(100, 200).toJsReference())
 
 
     if (extenalWithLambdasCount != 11) return "Fail 1"
@@ -195,7 +195,7 @@ fun box(): String {
         double = { 600.5 },
         string = { "700" },
         ei = { create123Array() },
-        dc = { DC(800, 800).toJsHandle() },
+        dc = { DC(800, 800).toJsReference() },
         dcGetY = { it.get().y }
     )
     if (externalWithLambdas2Count != 11) return "Fail externalWithLambdas2"
@@ -212,7 +212,7 @@ fun box(): String {
         { 600.5 },
         { "700" },
         { create123Array() },
-        { DC(800, 800).toJsHandle() },
+        { DC(800, 800).toJsReference() },
         { it.get().y }
     )
     if (externalWithLambdas2RefCount != 11) return "Fail externalWithLambdas2"
@@ -230,7 +230,7 @@ fun box(): String {
             600.5,
             "700",
             create123Array(),
-            DC(800, 800).toJsHandle(),
+            DC(800, 800).toJsReference(),
             { it.get().y }
         )
         if (jsLambdaCount != 11)

compiler/testData/codegen/boxWasmJsInterop/jsExport.kt

@@ -5,10 +5,10 @@
 class C(val x: Int)
 
 @JsExport
-fun makeC(x: Int): JsHandle<C> = C(x).toJsHandle()
+fun makeC(x: Int): JsReference<C> = C(x).toJsReference()
 
 @JsExport
-fun getX(c: JsHandle<C>): Int = c.get().x
+fun getX(c: JsReference<C>): Int = c.get().x
 
 @JsExport
 fun getString(s: String): String = "Test string $s";
@@ -19,10 +19,10 @@ fun isEven(x: Int): Boolean = x % 2 == 0
 external interface EI
 
 @JsExport
-fun eiAsAny(ei: EI): JsHandle<Any> = ei.toJsHandle()
+fun eiAsAny(ei: EI): JsReference<Any> = ei.toJsReference()
 
 @JsExport
-fun anyAsEI(any: JsHandle<Any>): EI = any.get() as EI
+fun anyAsEI(any: JsReference<Any>): EI = any.get() as EI
 
 fun box(): String = "OK"
 

compiler/testData/codegen/boxWasmJsInterop/jsToKotlinAdapters.kt

@@ -44,7 +44,7 @@ fun testExterRef() {
 }
 
 class DataRefImpl
-typealias DataRef = JsHandle<DataRefImpl>
+typealias DataRef = JsReference<DataRefImpl>
 
 fun notNullDataRef(x: DataRef): DataRef = js("x")
 
@@ -55,7 +55,7 @@ fun nullDataRef(x: DataRef): DataRef? = js("x")
 fun null2DataRef(x: DataRef): DataRef? = js("null")
 
 fun testDataRef() {
-    val dataRef = DataRefImpl().toJsHandle()
+    val dataRef = DataRefImpl().toJsReference()
     check(notNullDataRef(dataRef) == dataRef)
     checkNPE { notNull2DataRef(dataRef) }
     check (nullDataRef(dataRef) == dataRef)

compiler/testData/codegen/boxWasmJsInterop/jsTypes.kt

@@ -49,13 +49,13 @@ fun box(): String {
     assertTrue(jsArray[1] == "element1".toJsString())
     assertTrue(jsRepresentation(jsArray) == "object:element0,element1,element2")
 
-    // JsHandle
-    val jsHandle: JsHandle<Int> = 10.toJsHandle()
-    assertTrue(jsHandle.get() == 10)
-    assertTrue(jsHandle.toJsHandle().get() == jsHandle)
+    // JsReference
+    val jsReference: JsReference<Int> = 10.toJsReference()
+    assertTrue(jsReference.get() == 10)
+    assertTrue(jsReference.toJsReference().get() == jsReference)
     val c = listOf(1)
-    assertTrue(c.toJsHandle().get() === c.toJsHandle().get())
-    assertTrue(c.toJsHandle() === c.toJsHandle())
+    assertTrue(c.toJsReference().get() === c.toJsReference().get())
+    assertTrue(c.toJsReference() === c.toJsReference())
 
     return "OK"
 }

libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExternalWrapper.kt

@@ -126,8 +126,8 @@ private fun externrefEquals(lhs: ExternalInterfaceType, rhs: ExternalInterfaceTy
 
 private external fun tryGetOrSetExternrefBox(
     ref: ExternalInterfaceType,
-    ifNotCached: JsHandle<JsExternalBox>
-): JsHandle<JsExternalBox>?
+    ifNotCached: JsReference<JsExternalBox>
+): JsReference<JsExternalBox>?
 
 @WasmNoOpCast
 @Suppress("unused")
@@ -174,7 +174,7 @@ internal fun externRefToAny(ref: ExternalInterfaceType): Any? {
     // If we have Null in notNullRef -- return null
     // If we already have a box -- return it,
     // otherwise -- remember new box and return it.
-    return tryGetOrSetExternrefBox(ref, JsExternalBox(ref).toJsHandle())
+    return tryGetOrSetExternrefBox(ref, JsExternalBox(ref).toJsReference())
 }
 
 

libraries/stdlib/wasm/src/kotlin/Dynamic.kt

@@ -16,8 +16,8 @@ public external interface Dynamic : JsAny
 /**
  * Reinterprets this value as a value of the Dynamic type.
  */
-@Deprecated("If value is a subtype of JsAny, use JsAny instead. Otherwise, use toJsHandle", level = DeprecationLevel.ERROR)
-fun Any.asDynamic(): JsAny = this.toJsHandle()
+@Deprecated("If value is a subtype of JsAny, use JsAny instead. Otherwise, use toJsReference", level = DeprecationLevel.ERROR)
+fun Any.asDynamic(): JsAny = this.toJsReference()
 
 /**
  * Reinterprets this value as a value of the Dynamic type.

libraries/stdlib/wasm/src/kotlin/js/JsReference.kt

@@ -10,20 +10,20 @@ import kotlin.wasm.internal.implementedAsIntrinsic
 import kotlin.wasm.internal.returnArgumentIfItIsKotlinAny
 
 /**
- * JavaScript value that can serve as a handle for any Kotlin value.
+ * JavaScript value that can serve as a reference for any Kotlin value.
  *
  * In JavaScript, it behaves like an immutable empty object with a null prototype.
  * When passed back to Kotlin/Wasm, the original value can be retrieved using the [get] method.
  */
 @Suppress("WRONG_JS_INTEROP_TYPE")  // Exception to the rule
-public sealed external interface JsHandle<out T : Any> : JsAny
+public sealed external interface JsReference<out T : Any> : JsAny
 
 @WasmOp(WasmOp.EXTERN_EXTERNALIZE)
-public fun <T : Any> T.toJsHandle(): JsHandle<T> =
+public fun <T : Any> T.toJsReference(): JsReference<T> =
     implementedAsIntrinsic
 
-/** Retrieve original Kotlin value from JsHandle */
-public fun <T : Any> JsHandle<T>.get(): T {
+/** Retrieve original Kotlin value from JsReference */
+public fun <T : Any> JsReference<T>.get(): T {
     returnArgumentIfItIsKotlinAny(this)
-    throw ClassCastException("JsHandle doesn't contain a Kotlin type")
+    throw ClassCastException("JsReference doesn't contain a Kotlin type")
 }

libraries/stdlib/wasm/test/js/AsyncTest.kt

@@ -57,6 +57,6 @@ class AsyncTest {
     @Test
     fun testJsValueToThrowableOrNull2() {
         val e = MyThrowable()
-        assertEquals((e.toJsHandle()).toThrowableOrNull(), e)
+        assertEquals((e.toJsReference()).toThrowableOrNull(), e)
     }
 }