JS backend: support for Throwable.getMessage

js/js.libraries/src/core/javalang.kt

@@ -1,30 +1,28 @@
 package java.lang
 
-import java.io.IOException
-
-native("Error")
-open public class Exception(message: String? = null): Throwable() {}
+library
+open public class Exception(message: String? = null): Throwable(message) {}
 
 library
 open public class RuntimeException(message: String? = null) : Exception(message) {}
 
 library
-public class IllegalArgumentException(message: String? = null) : Exception() {}
+public class IllegalArgumentException(message: String? = null) : RuntimeException(message) {}
 
 library
-public class IllegalStateException(message: String? = null) : Exception() {}
-
-native("RangeError")
-public class IndexOutOfBounds(message: String? = null) : Exception(message) {}
-
-native("RangeError")
-public class IndexOutOfBoundsException(message: String? = null) : Exception(message) {}
+public class IllegalStateException(message: String? = null) : RuntimeException(message) {}
 
 library
-public class UnsupportedOperationException(message: String? = null) : Exception() {}
+public class IndexOutOfBoundsException(message: String? = null) : RuntimeException(message) {}
 
 library
-public class NumberFormatException(message: String? = null) : Exception() {}
+public class UnsupportedOperationException(message: String? = null) : RuntimeException(message) {}
+
+library
+public class NumberFormatException(message: String? = null) : RuntimeException(message) {}
+
+library
+public class NullPointerException(message: String? = null) : RuntimeException(message) {}
 
 library
 public trait Runnable {

js/js.tests/test/org/jetbrains/k2js/test/semantics/TryCatchTest.java

@@ -34,6 +34,10 @@ public class TryCatchTest extends AbstractExpressionTest {
         checkFooBoxIsOk();
     }
 
+    public void testTryCatchExpressionWithMessage() throws Exception {
+        checkFooBoxIsOk();
+    }
+
     public void testMultipleCatchBlocks() throws Exception {
         checkFooBoxIsOk();
     }

js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/functions/factories/CompositeFIF.java

@@ -34,6 +34,7 @@ import java.util.List;
 public abstract class CompositeFIF implements FunctionIntrinsicFactory {
     @NotNull
     public static final FunctionIntrinsic LENGTH_PROPERTY_INTRINSIC = new BuiltInPropertyIntrinsic("length");
+    public static final FunctionIntrinsic MESSAGE_PROPERTY_INTRINSIC = new BuiltInPropertyIntrinsic("message");
     public static final FunctionIntrinsic IS_EMPTY_INTRINSIC = new FunctionIntrinsic() {
         @NotNull
         @Override

js/js.translator/src/org/jetbrains/k2js/translate/intrinsic/functions/factories/TopLevelFIF.java

@@ -167,6 +167,8 @@ public final class TopLevelFIF extends CompositeFIF {
 
         add(pattern("kotlin.js", "Json", "get"), ArrayFIF.GET_INTRINSIC);
         add(pattern("kotlin.js", "Json", "set"), ArrayFIF.SET_INTRINSIC);
+
+        add(pattern("kotlin", "Throwable", "getMessage"), MESSAGE_PROPERTY_INTRINSIC);
     }
 
     private abstract static class NativeMapGetSet extends CallParametersAwareFunctionIntrinsic {

js/js.translator/testData/expression/try/cases/tryCatchExpressionWithMessage.kt

@@ -0,0 +1,57 @@
+package foo
+
+fun box(): String {
+
+    var s: String = ""
+
+    try {
+        throw Exception("Exception")
+    } catch (e: Throwable) {
+        s = "Throwable:" + e.getMessage()!!
+    }
+    assertEquals("Throwable:Exception", s)
+
+    s = ""
+    try {
+        throw Exception("Exception")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:Exception", s)
+
+    s = ""
+    try {
+        throw RuntimeException("RuntimeException")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:RuntimeException", s)
+
+    s = ""
+    try {
+        throw NullPointerException("NullPointerException")
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("Exception:NullPointerException", s)
+
+    s = ""
+    try {
+        throw IndexOutOfBoundsException("IndexOutOfBoundsException")
+    } catch (e: NullPointerException) {
+        s = "NullPointerException:" + e.getMessage()!!
+    } catch (e: RuntimeException) {
+        s = "RuntimeException:" + e.getMessage()!!
+    } catch (e: Exception) {
+        s = "Exception:" + e.getMessage()!!
+    }
+    assertEquals("RuntimeException:IndexOutOfBoundsException", s)
+
+    try {
+        throw RuntimeException()
+    } catch (e: Exception) {
+        assertEquals(null, e.getMessage())
+    }
+
+   return "OK"
+}

js/js.translator/testData/kotlin_lib.js

@@ -164,16 +164,28 @@
         return new Kotlin.Progression(from, to, -1);
     };
 
-    Kotlin.RuntimeException = Kotlin.createClassNow();
-    Kotlin.NullPointerException = Kotlin.createClassNow();
-    Kotlin.NoSuchElementException = Kotlin.createClassNow();
-    Kotlin.IllegalArgumentException = Kotlin.createClassNow();
-    Kotlin.IllegalStateException = Kotlin.createClassNow();
-    Kotlin.UnsupportedOperationException = Kotlin.createClassNow();
-    Kotlin.IOException = Kotlin.createClassNow();
+    Kotlin.Exception = Error;
 
-    Kotlin.throwNPE = function () {
-        throw new Kotlin.NullPointerException();
+    function createClassNowWithMessage(base) {
+        return Kotlin.createClassNow(base,
+                   /** @constructs */
+                   function (message) {
+                       this.message = (message !== undefined) ? message : null;
+                   }
+               );
+    }
+
+    Kotlin.RuntimeException = createClassNowWithMessage(Kotlin.Exception);
+    Kotlin.NullPointerException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.NoSuchElementException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.IllegalArgumentException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.IllegalStateException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.UnsupportedOperationException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.IndexOutOfBoundsException = createClassNowWithMessage(Kotlin.RuntimeException);
+    Kotlin.IOException = createClassNowWithMessage(Kotlin.Exception);
+
+    Kotlin.throwNPE = function (message) {
+        throw new Kotlin.NullPointerException(message);
     };
 
     function throwAbstractFunctionInvocationError(funName) {
@@ -468,7 +480,7 @@
             },
             checkRange: function (index) {
                 if (index < 0 || index >= this.array.length) {
-                    throw new RangeError();
+                    throw new Kotlin.IndexOutOfBoundsException();
                 }
             }
         });