add export from kotlin into swift of simple documentation comment #KT-65913 fixed

Merge-request: KT-MR-14622
Merged-by: Artem Olkov <artem.olkov@jetbrains.com>

native/swift/sir-printer/src/org/jetbrains/sir/printer/SirAsSwiftSourcesPrinter.kt

@@ -42,6 +42,7 @@ public class SirAsSwiftSourcesPrinter(private val printer: SmartPrinter) : SirVi
     }
 
     override fun visitClass(klass: SirClass): Unit = with(printer) {
+        printDocumentation(klass)
         printVisibility(klass)
         println(
             "class ",
@@ -55,6 +56,7 @@ public class SirAsSwiftSourcesPrinter(private val printer: SmartPrinter) : SirVi
     }
 
     override fun visitVariable(variable: SirVariable): Unit = with(printer) {
+        printDocumentation(variable)
         printVisibility(variable)
         printCallableKind(variable.kind)
         print(
@@ -94,7 +96,7 @@ public class SirAsSwiftSourcesPrinter(private val printer: SmartPrinter) : SirVi
     }
 
     override fun visitFunction(function: SirFunction): Unit = with(printer) {
-        function.documentation?.let { println(it) }
+        printDocumentation(function)
         printVisibility(function)
         printCallableKind(function.kind)
         print(
@@ -118,7 +120,7 @@ public class SirAsSwiftSourcesPrinter(private val printer: SmartPrinter) : SirVi
     }
 
     override fun visitInit(init: SirInit): Unit = with(printer) {
-        init.documentation?.let { println(it) }
+        printDocumentation(init)
         printVisibility(init)
         printInitKind(init.initKind)
         print("init")
@@ -192,6 +194,10 @@ internal fun SmartPrinter.printVisibility(decl: SirDeclaration) {
     )
 }
 
+internal fun SmartPrinter.printDocumentation(decl: SirDeclaration) {
+    decl.documentation?.lines()?.forEach { println(it.trimIndent()) }
+}
+
 internal fun SmartPrinter.printInitKind(decl: SirInitializerKind) {
     print(
         when (decl) {

native/swift/sir-printer/testData/commented_class.golden.swift

@@ -0,0 +1,6 @@
+/// Function foo description.
+/// - Parameters:
+///   - p: first Integer to consume
+/// - Returns: Bool
+public class Foo {
+}

native/swift/sir-printer/testData/commented_namespaced_class.golden.swift

@@ -0,0 +1,8 @@
+public enum NAMESPACE {
+    /**
+    *  demo comment for
+    *  NAMESPACED_CLASS
+    */
+    public class Foo {
+    }
+}

native/swift/sir-printer/testData/commented_variable.golden.swift

@@ -0,0 +1,8 @@
+
+/// Function foo description.
+/// - Parameters:
+///   - p: first Integer to consume
+/// - Returns: Bool
+public var myVariable: Swift.Bool {
+    get
+}

native/swift/sir-printer/tests/org/jetbrains/kotlin/sir/printer/SirAsSwiftSourcesPrinterTests.kt

@@ -270,7 +270,7 @@ class SirAsSwiftSourcesPrinterTests {
     }
 
     @Test
-    fun `should print DocC comment`() {
+    fun `should print DocC comment on function`() {
 
         val module = buildModule {
             name = "Test"
@@ -303,6 +303,89 @@ class SirAsSwiftSourcesPrinterTests {
         )
     }
 
+    @Test
+    fun `should print DocC comment on class`() {
+
+        val module = buildModule {
+            name = "Test"
+            declarations.add(
+                buildClass {
+                    origin = SirOrigin.Unknown
+                    visibility = SirVisibility.PUBLIC
+                    name = "Foo"
+                    documentation = """
+                            /// Function foo description.
+                            /// - Parameters:
+                            ///   - p: first Integer to consume
+                            /// - Returns: Bool
+                        """.trimIndent()
+                }
+            )
+        }
+
+        runTest(
+            module,
+            "testData/commented_class"
+        )
+    }
+
+    @Test
+    fun `should print DocC comment on namespaced class`() {
+
+        val module = buildModule {
+            name = "Test"
+            declarations.add(
+                buildEnum {
+                    name = "NAMESPACE"
+                    declarations += buildClass {
+                        origin = SirOrigin.Unknown
+                        visibility = SirVisibility.PUBLIC
+                        name = "Foo"
+                        documentation = """
+                            /**
+                             *  demo comment for
+                             *  NAMESPACED_CLASS
+                             */
+                        """.trimIndent()
+                    }
+                }
+            )
+        }
+
+        runTest(
+            module,
+            "testData/commented_namespaced_class"
+        )
+    }
+
+    @Test
+    fun `should print DocC comment on variable`() {
+
+        val module = buildModule {
+            name = "Test"
+            declarations.add(
+                buildVariable {
+                    name = "myVariable"
+                    type = SirNominalType(SirSwiftModule.bool)
+                    getter = buildGetter {
+                        kind = SirCallableKind.INSTANCE_METHOD
+                    }
+                    documentation = """
+                            /// Function foo description.
+                            /// - Parameters:
+                            ///   - p: first Integer to consume
+                            /// - Returns: Bool
+                        """.trimIndent()
+                }
+            )
+        }
+
+        runTest(
+            module,
+            "testData/commented_variable"
+        )
+    }
+
     @Test
     fun `should print empty class`() {