[KT-63275] Add a nullable body property to SIR functions

native/swift/sir-passes/tests/org/jetbrains/kotlin/sir/passes/mocks/MockSirFunction.kt

@@ -5,8 +5,8 @@
 
 package org.jetbrains.kotlin.sir.passes.mocks
 
+import org.jetbrains.kotlin.sir.SirFunctionBody
 import org.jetbrains.kotlin.sir.*
-import org.jetbrains.kotlin.sir.util.SirSwiftModule
 import org.jetbrains.kotlin.sir.visitors.SirTransformer
 import org.jetbrains.kotlin.sir.visitors.SirVisitor
 
@@ -20,4 +20,6 @@ class MockSirFunction(
 ) : SirFunction() {
     override fun <R, D> acceptChildren(visitor: SirVisitor<R, D>, data: D) = Unit
     override fun <D> transformChildren(transformer: SirTransformer<D>, data: D) = Unit
+
+    override var body: SirFunctionBody? = null
 }

native/swift/sir/gen/org/jetbrains/kotlin/sir/SirFunction.kt

@@ -21,6 +21,7 @@ abstract class SirFunction : SirElementBase(), SirCallable {
     abstract val name: String
     abstract val parameters: List<SirParameter>
     abstract val returnType: SirType
+    abstract var body: SirFunctionBody?
 
     override fun <R, D> accept(visitor: SirVisitor<R, D>, data: D): R =
         visitor.visitFunction(this, data)

native/swift/sir/gen/org/jetbrains/kotlin/sir/builder/SirFunctionBuilder.kt

@@ -21,6 +21,7 @@ class SirFunctionBuilder {
     lateinit var name: String
     val parameters: MutableList<SirParameter> = mutableListOf()
     lateinit var returnType: SirType
+    var body: SirFunctionBody? = null
 
     fun build(): SirFunction {
         return SirFunctionImpl(
@@ -29,8 +30,10 @@ class SirFunctionBuilder {
             name,
             parameters,
             returnType,
+            body,
         )
     }
+
 }
 
 @OptIn(ExperimentalContracts::class)
@@ -52,5 +55,6 @@ inline fun buildFunctionCopy(original: SirFunction, init: SirFunctionBuilder.()
     copyBuilder.name = original.name
     copyBuilder.parameters.addAll(original.parameters)
     copyBuilder.returnType = original.returnType
+    copyBuilder.body = original.body
     return copyBuilder.apply(init).build()
 }

native/swift/sir/gen/org/jetbrains/kotlin/sir/impl/SirFunctionImpl.kt

@@ -20,6 +20,7 @@ internal class SirFunctionImpl(
     override val name: String,
     override val parameters: MutableList<SirParameter>,
     override val returnType: SirType,
+    override var body: SirFunctionBody?,
 ) : SirFunction() {
     override lateinit var parent: SirDeclarationParent
 

native/swift/sir/src/org/jetbrains/kotlin/sir/SirFunctionBody.kt

@@ -0,0 +1,9 @@
+/*
+ * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.sir
+
+class SirFunctionBody {
+}

native/swift/sir/tree-generator/src/org/jetbrains/kotlin/sir/tree/generator/SwiftIrTree.kt

@@ -84,6 +84,7 @@ object SwiftIrTree : AbstractSwiftIrTreeBuilder() {
         +field("name", string)
         +listField("parameters", parameterType)
         +field("returnType", typeType)
+        +field("body", functionBodyType, nullable = true, mutable = true)
     }
 
     val foreignFunction by element {

native/swift/sir/tree-generator/src/org/jetbrains/kotlin/sir/tree/generator/Types.kt

@@ -14,6 +14,7 @@ val originType = type(BASE_PACKAGE, "SirOrigin", TypeKind.Class)
 val parameterType = type(BASE_PACKAGE, "SirParameter", TypeKind.Class)
 val typeType = type(BASE_PACKAGE, "SirType", TypeKind.Class)
 val enumCaseType = type(BASE_PACKAGE, "SirEnumCase", TypeKind.Class)
+val functionBodyType = type(BASE_PACKAGE, "SirFunctionBody", TypeKind.Class)
 
 private const val VISITORS_PACKAGE = "$BASE_PACKAGE.visitors"