Move optional annotation utilities to module 'resolution'

To avoid depending on a heavy module 'frontend' in parts of the compiler where checking for optional annotations is needed, such as in 'ir.serialization.common'.
2021-04-22 20:31:53 +02:00
parent e790fa8ac9
commit bcf47ddc94
15 changed files with 67 additions and 70 deletions
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2021 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.resolve.multiplatform
+
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.ClassKind
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.resolve.descriptorUtil.module
+
+object OptionalAnnotationUtil {
+    val OPTIONAL_EXPECTATION_FQ_NAME = FqName("kotlin.OptionalExpectation")
+
+    @JvmStatic
+    fun shouldGenerateExpectClass(descriptor: ClassDescriptor): Boolean {
+        assert(descriptor.isExpect) { "Not an expected class: $descriptor" }
+
+        if (isOptionalAnnotationClass(descriptor)) {
+            with(ExpectedActualResolver) {
+                return descriptor.findCompatibleActualForExpected(descriptor.module).isEmpty()
+            }
+        }
+
+        return false
+    }
+
+    @JvmStatic
+    fun isOptionalAnnotationClass(descriptor: DeclarationDescriptor): Boolean =
+        descriptor is ClassDescriptor &&
+                descriptor.kind == ClassKind.ANNOTATION_CLASS &&
+                descriptor.isExpect &&
+                descriptor.annotations.hasAnnotation(OPTIONAL_EXPECTATION_FQ_NAME)
+}