FE: Minor. Extract AbstractTypeApproximator.approximateEntryPoint

Author: dzharkov

compiler/resolution.common/src/org/jetbrains/kotlin/types/AbstractTypeApproximator.kt

@@ -81,19 +81,26 @@ abstract class AbstractTypeApproximator(
         conf: TypeApproximatorConfiguration,
         caches: TypeApproximatorCachesPerConfiguration? = null,
     ): KotlinTypeMarker? {
-        return context(conf, caches?.getOrPut(conf, ::Cache) ?: Cache()) {
-            approximateToSuperType(type, -type.typeDepthForApproximation())
-        }
+        return approximateEntryPoint(type, conf, caches) { type, depth -> approximateToSuperType(type, depth) }
     }
 
     // resultType <: type
     fun approximateToSubType(
         type: KotlinTypeMarker,
         conf: TypeApproximatorConfiguration,
         caches: TypeApproximatorCachesPerConfiguration? = null,
+    ): KotlinTypeMarker? {
+        return approximateEntryPoint(type, conf, caches) { type, depth -> approximateToSubType(type, depth) }
+    }
+
+    private inline fun approximateEntryPoint(
+        type: KotlinTypeMarker,
+        conf: TypeApproximatorConfiguration,
+        caches: TypeApproximatorCachesPerConfiguration?,
+        approximateTo: context(TypeApproximatorConfiguration, Cache) (KotlinTypeMarker, Int) -> KotlinTypeMarker?,
     ): KotlinTypeMarker? {
         return context(conf, caches?.getOrPut(conf, ::Cache) ?: Cache()) {
-            approximateToSubType(type, -type.typeDepthForApproximation())
+            approximateTo(type, -type.typeDepthForApproximation())
         }
     }