Transform Throwable members to properties

compiler/testData/builtin-classes.txt

@@ -1274,8 +1274,10 @@ public final class String : kotlin.Comparable<kotlin.String>, kotlin.CharSequenc
 
 public open class Throwable {
     /*primary*/ public constructor Throwable(/*0*/ message: kotlin.String? = ..., /*1*/ cause: kotlin.Throwable? = ...)
-    public final fun getCause(): kotlin.Throwable?
-    public final fun getMessage(): kotlin.String?
+    public final val cause: kotlin.Throwable?
+        public final fun <get-cause>(): kotlin.Throwable?
+    public final val message: kotlin.String?
+        public final fun <get-message>(): kotlin.String?
     public final fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/codegen/box/builtinsProperties/throwable.kt

+fun box(): String {
+    try {
+        throw Throwable("OK", null)
+    } catch (t: Throwable) {
+        if (t.cause != null) return "fail 1"
+        return t.message!!
+    }
+
+    return "fail 2"
+}

compiler/testData/codegen/box/classes/exceptionConstructor.kt

@@ -3,5 +3,5 @@ class GameError(msg: String): Exception(msg) {
 
 fun box(): String {
   val e = GameError("foo")
-  return if (e.getMessage() == "foo") "OK" else "fail"
+  return if (e.message == "foo") "OK" else "fail"
 }

compiler/testData/codegen/box/controlStructures/tryCatchInExpressions/multipleCatchBlocks.kt

@@ -13,7 +13,7 @@ fun box(): String =
             "e2"
         }
         catch (e3: Exception3) {
-            e3.getMessage()
+            e3.message
         }
         catch (e: Exception) {
             "e"

compiler/testData/codegen/controlStructures/tryCatch.kt

@@ -4,6 +4,6 @@ fun foo(s: String): String? {
     return "no message";
   }
   catch(e: NumberFormatException) {
-    return e.getMessage(); // Work around an overload-resolution bug
+    return e.message // Work around an overload-resolution bug
   }
 }

compiler/testData/compileJavaAgainstKotlin/method/throws/ClassMembers.txt

@@ -2,15 +2,15 @@ package test
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 
 public final class E2 : java.lang.Exception {
     public constructor E2()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/Constructor.txt

@@ -2,15 +2,15 @@ package test
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 
 public final class E2 : java.lang.Exception {
     public constructor E2()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/DefaultArgs.txt

@@ -4,8 +4,8 @@ package test
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/Delegation.txt

@@ -2,15 +2,15 @@ package test
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 
 public final class E2 : java.lang.Exception {
     public constructor E2()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/GenericSubstitution.txt

@@ -11,8 +11,8 @@ public final class Derived : test.Base<kotlin.String> {
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/TopLevel.txt

@@ -6,15 +6,15 @@ public fun two(): kotlin.Unit
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 
 public final class E2 : java.lang.Exception {
     public constructor E2()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/compileJavaAgainstKotlin/method/throws/TraitMembers.txt

@@ -2,15 +2,15 @@ package test
 
 public final class E1 : java.lang.Exception {
     public constructor E1()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 
 public final class E2 : java.lang.Exception {
     public constructor E2()
-    public final /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final /*fake_override*/ fun getMessage(): kotlin.String?
+    public final /*fake_override*/ val cause: kotlin.Throwable?
+    public final /*fake_override*/ val message: kotlin.String?
     public final /*fake_override*/ fun printStackTrace(): kotlin.Unit
 }
 

compiler/testData/diagnostics/tests/ResolveToJava.kt

@@ -36,7 +36,7 @@ fun test(<!UNUSED_PARAMETER!>l<!> : <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.util
     // ...
   }
   catch(e: Exception) {
-    System.out.println(e.getMessage())
+    System.out.println(e.message)
   }
 
   PrintStream("sdf")

compiler/testData/diagnostics/tests/regressions/DoubleDefine.kt

@@ -60,6 +60,6 @@ fun main(args: Array<String>) {
       System.out.println("You won!");
   }
   catch(e: Throwable) {
-    System.out.println(e.getMessage())
+    System.out.println(e.message)
   }
 }

compiler/testData/diagnostics/tests/regressions/kt498.txt

@@ -4,9 +4,9 @@ public fun </*0*/ T : kotlin.Any> T.getJavaClass(): java.lang.Class<T>
 
 public final class IdUnavailableException : java.lang.Exception {
     public constructor IdUnavailableException()
+    public final override /*1*/ /*fake_override*/ val cause: kotlin.Throwable?
+    public final override /*1*/ /*fake_override*/ val message: kotlin.String?
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    public final override /*1*/ /*fake_override*/ fun getCause(): kotlin.Throwable?
-    public final override /*1*/ /*fake_override*/ fun getMessage(): kotlin.String?
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final override /*1*/ /*fake_override*/ fun printStackTrace(): kotlin.Unit
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -921,6 +921,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinsProperties/maps.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("throwable.kt")
+        public void testThrowable() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinsProperties/throwable.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("compiler/testData/codegen/box/casts")

core/builtins/native/kotlin/Throwable.kt

@@ -22,17 +22,7 @@ package kotlin
  * @param message the detail message string.
  * @param cause the cause of this throwable.
  */
-public open class Throwable(message: String? = null, cause: Throwable? = null) {
-    /**
-     * Returns the detail message of this throwable.
-     */
-    public fun getMessage(): String?
-
-    /**
-     * Returns the cause of this throwable.
-     */
-    public fun getCause(): Throwable?
-
+public open class Throwable(val message: String? = null, val cause: Throwable? = null) {
     /**
      * Prints the stack trace of this throwable to the standard output.
      */

idea/testData/checker/ResolveToJava.kt

@@ -35,7 +35,7 @@ fun test(<warning>l</warning> : List<Int>) {
     // ...
   }
   catch(e: Exception) {
-    System.out.println(e.getMessage())
+    System.out.println(e.message)
   }
 
   PrintStream("sdf")

idea/testData/checker/regression/DoubleDefine.kt

@@ -60,6 +60,6 @@ fun main(args: Array<String>) {
       System.out.println("You won!");
   }
   catch(e: Throwable) {
-    System.out.println(e.getMessage())
+    System.out.println(e.message)
   }
 }

js/js.translator/testData/regression/cases/kt2470.kt

@@ -2,8 +2,6 @@
 
 package foo
 
-@native val Exception.message: String get() = noImpl
-
 public fun <T : Throwable> failsWith(block: () -> Any): T {
     try {
         block()
@@ -20,5 +18,5 @@ fun box(): String {
         throw Exception("OK")
     }
 
-    return a.message
+    return a.message!!
 }

js/js.translator/testData/standardClasses/cases/arrayFactoryMethods.kt

 package foo
 
-class Fail(val message: String) : Exception(message)
+class Fail(message: String) : Exception(message)
 
 fun test(testName: String, actual: Any, expectedAsString: String) {
     val expected = eval("[$expectedAsString]")
@@ -20,7 +20,7 @@ fun box(): String {
         test("doubleArrayOf", doubleArrayOf(0.0, 1.1, 2.2, 3.3, 4.4), "0.0, 1.1, 2.2, 3.3, 4.4")
     }
     catch (e: Fail) {
-        return e.message
+        return e.message!!
     }
 
     return "OK"

libraries/stdlib/src/kotlin/collections/DeprecatedBuiltins.kt

@@ -78,3 +78,9 @@ public inline fun <K, V> Map<K, V>.values(): Collection<V> = values
 @kotlin.jvm.JvmName("mutableValues")
 @Deprecated("Use property 'values' instead", ReplaceWith("this.values"))
 public inline fun <K, V> MutableMap<K, V>.values(): MutableCollection<V> = values
+
+@Deprecated("Use property 'message' instead", ReplaceWith("this.message"))
+public inline fun Throwable.getMessage(): String? = message
+
+@Deprecated("Use property 'cause' instead", ReplaceWith("this.cause"))
+public inline fun Throwable.getCause(): Throwable? = cause