FIR UAST: convert LeafPsiElement to UIdentifier

plugins/uast-kotlin-base/src/org/jetbrains/uast/kotlin/internal/converterUtils.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.uast.kotlin
 
+import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.uast.DEFAULT_EXPRESSION_TYPES_LIST
 import org.jetbrains.uast.DEFAULT_TYPES_LIST
 import org.jetbrains.uast.UElement
@@ -40,3 +41,9 @@ fun <U : UElement> Array<out Class<out UElement>>.accommodate(vararg makers: UEl
 inline fun <reified U : UElement> alternative(noinline make: () -> U?) = UElementAlternative(U::class.java, make)
 
 class UElementAlternative<U : UElement>(val uType: Class<U>, val make: () -> U?)
+
+val identifiersTokens = setOf(
+    KtTokens.IDENTIFIER, KtTokens.CONSTRUCTOR_KEYWORD, KtTokens.OBJECT_KEYWORD,
+    KtTokens.THIS_KEYWORD, KtTokens.SUPER_KEYWORD,
+    KtTokens.GET_KEYWORD, KtTokens.SET_KEYWORD
+)

plugins/uast-kotlin-fir/src/org/jetbrains/uast/kotlin/FirKotlinConverter.kt

@@ -6,13 +6,16 @@
 package org.jetbrains.uast.kotlin
 
 import com.intellij.psi.PsiElement
+import com.intellij.psi.impl.source.tree.LeafPsiElement
 import org.jetbrains.kotlin.asJava.LightClassUtil
 import org.jetbrains.kotlin.asJava.classes.KtLightClass
 import org.jetbrains.kotlin.asJava.elements.*
 import org.jetbrains.kotlin.asJava.findFacadeClass
 import org.jetbrains.kotlin.asJava.toLightClass
 import org.jetbrains.kotlin.asJava.toPsiParameters
+import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.psi.*
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 import org.jetbrains.uast.*
 
@@ -192,6 +195,25 @@ internal object FirKotlinConverter {
                 is KtImportDirective -> {
                     el<UImportStatement>(build(::KotlinUImportStatement))
                 }
+                is LeafPsiElement -> {
+                    when {
+                        element.elementType in identifiersTokens -> {
+                            if (element.elementType != KtTokens.OBJECT_KEYWORD ||
+                                element.getParentOfType<KtObjectDeclaration>(false)?.nameIdentifier == null
+                            )
+                                el<UIdentifier>(build(::FirKotlinUIdentifier))
+                            else null
+                        }
+                        element.elementType in KtTokens.OPERATIONS && element.parent is KtOperationReferenceExpression -> {
+                            el<UIdentifier>(build(::FirKotlinUIdentifier))
+                        }
+                        element.elementType == KtTokens.LBRACKET && element.parent is KtCollectionLiteralExpression -> {
+                            // TODO: need counterpart of UCollectionLiteralExpression
+                            null
+                        }
+                        else -> null
+                    }
+                }
                 else -> null
             }
         }

plugins/uast-kotlin-fir/src/org/jetbrains/uast/kotlin/declarations/FirKotlinUIdentifier.kt

@@ -50,4 +50,6 @@ class FirKotlinUIdentifier(
         }
         return null
     }
+
+    constructor(sourcePsi: PsiElement?, uastParent: UElement?) : this(null, sourcePsi, uastParent)
 }

plugins/uast-kotlin-fir/testData/legacyIdentifiers/AnnotatedExpressions.identifiers.fir.txt

@@ -0,0 +1,30 @@
+foo -> UMethod (name = foo)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (PROPERTY)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    b -> [!] UnknownKotlinExpression (PROPERTY)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    > -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    c -> [!] UnknownKotlinExpression (PROPERTY)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ?: -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+annotatedSwitch -> UMethod (name = annotatedSwitch)
+str -> UParameter (name = str)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+str -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+isBlank -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+str -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+isNotEmpty -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+!= -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/AnnotationComplex.identifiers.fir.txt

@@ -0,0 +1,27 @@
+Annotation -> UClass (name = Annotation)
+strings -> UMethod (name = strings)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Annotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> UClass (name = A)
+AnnotationInner -> UClass (name = AnnotationInner)
+value -> UMethod (name = value)
+Annotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+AnnotationArray -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Annotation -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+B1 -> UClass (name = B1)
+AnnotationArray -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+value -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Annotation -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+B2 -> UClass (name = B2)
+AnnotationArray -> UClass (name = AnnotationArray)
+value -> UMethod (name = value)
+Annotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+AnnotationArray -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Annotation -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+strings -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+arrayOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+C -> UClass (name = C)
+AnnotationArray -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Annotation -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+strings -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+C2 -> UClass (name = C2)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/AnnotationParameters.identifiers.fir.txt

@@ -0,0 +1,40 @@
+IntRange -> UClass (name = IntRange)
+from -> UMethod (name = from)
+Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+to -> UMethod (name = to)
+Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+RequiresPermission -> UClass (name = RequiresPermission)
+anyOf -> UMethod (name = anyOf)
+IntArray -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+RequiresStrPermission -> UClass (name = RequiresStrPermission)
+strs -> UMethod (name = strs)
+Array -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+WithDefaultValue -> UClass (name = WithDefaultValue)
+value -> UMethod (name = value)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SuppressLint -> UClass (name = SuppressLint)
+value -> UMethod (name = value)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+RequiresPermission -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+anyOf -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+intArrayOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+IntRange -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+from -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+to -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+WithDefaultValue -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SuppressLint -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+IntRange -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SuppressLint -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+RequiresPermission -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+anyOf -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+fooWithArrLiteral -> UMethod (name = fooWithArrLiteral)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+RequiresStrPermission -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+strs -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+fooWithStrArrLiteral -> UMethod (name = fooWithStrArrLiteral)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Anonymous.identifiers.fir.txt

@@ -0,0 +1,35 @@
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+io -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Closeable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+io -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+InputStream -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+    runnable -> [!] UnknownKotlinExpression (PROPERTY)
+    object -> UClass (name = null)
+    Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    run -> UMethod (name = run)
+    runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    run -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    runnable2 -> [!] UnknownKotlinExpression (PROPERTY)
+    Runnable -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    runnable2 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    run -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    closeableRunnable -> [!] UnknownKotlinExpression (PROPERTY)
+    object -> UClass (name = null)
+    Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Closeable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    close -> UMethod (name = close)
+    run -> UMethod (name = run)
+    runnableIs -> [!] UnknownKotlinExpression (PROPERTY)
+    object -> UClass (name = null)
+    InputStream -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    read -> UMethod (name = read)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    run -> UMethod (name = run)
+withErr -> UMethod (name = withErr)
+    runnable -> [!] UnknownKotlinExpression (PROPERTY)
+    object -> [!] UnknownKotlinExpression (OBJECT_DECLARATION)
+    Runnable -> null

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Assertion.identifiers.fir.txt

@@ -0,0 +1,6 @@
+foo -> UMethod (name = foo)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    s -> [!] UnknownKotlinExpression (PROPERTY)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    s -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    !! -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Bitwise.identifiers.fir.txt

@@ -0,0 +1,72 @@
+foo -> UMethod (name = foo)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mask -> [!] UnknownKotlinExpression (PROPERTY)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    pos -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    and -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    max -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    or -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    zebra -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    xor -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    signed -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    shr -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    one -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ushr -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zero -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    shl -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    pos -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zero -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    - -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zebra -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    * -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    signed -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    / -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    one -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mask -> [!] UnknownKotlinExpression (PROPERTY)
+    Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    pos -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    and -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    max -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    or -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    zebra -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    xor -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mask -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    signed -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    shr -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    one -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ushr -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zero -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    shl -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    pos -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zero -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    - -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    zebra -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    * -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    signed -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    / -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    one -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/BrokenMethod.identifiers.fir.txt

@@ -0,0 +1,15 @@
+main -> UMethod (name = main)
+args -> UParameter (name = args)
+Array -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    TestUsed -> UClass (name = TestUsed)
+    parameter -> UParameter (name = parameter)
+    CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Used -> UClass (name = Used)
+    parameter -> UParameter (name = parameter)
+    Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    object -> UClass (name = Companion)
+    Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    doStuff1 -> UMethod (name = doStuff1)
+    Used -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ClassAnnotation.identifiers.fir.txt

@@ -0,0 +1,13 @@
+Test -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> UClass (name = A)
+MyAnnotation -> UClass (name = MyAnnotation)
+text -> UMethod (name = text)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> UClass (name = B)
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+InB -> UClass (name = InB)
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+object -> UClass (name = Companion)
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Obj -> UClass (name = Obj)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ConstructorDelegate.identifiers.fir.txt

@@ -0,0 +1,21 @@
+Base -> UClass (name = Base)
+print -> UMethod (name = print)
+BaseImpl -> UClass (name = BaseImpl)
+x -> UParameter (name = x)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Base -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+print -> UMethod (name = print)
+    print -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Derived -> UClass (name = Derived)
+b -> UParameter (name = b)
+Base -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Base -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+createBase -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+createBase -> UMethod (name = createBase)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Base -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    BaseImpl -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Constructors.identifiers.fir.txt

@@ -0,0 +1,80 @@
+A -> UClass (name = A)
+str -> UParameter (name = str)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+constructor -> UMethod (name = A)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+AWithInit -> UClass (name = AWithInit)
+str -> UParameter (name = str)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+constructor -> UMethod (name = AWithInit)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+AWith2Init -> UClass (name = AWith2Init)
+str -> UParameter (name = str)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+constructor -> UMethod (name = AWith2Init)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+AOnlyInit -> UClass (name = AOnlyInit)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+AWithSecondary -> UClass (name = AWithSecondary)
+a -> UField (name = a)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+constructor -> UMethod (name = AWithSecondary)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+constructor -> UMethod (name = AWithSecondary)
+s -> UParameter (name = s)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    s -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+AWithSecondaryInit -> UClass (name = AWithSecondaryInit)
+a -> UField (name = a)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+constructor -> UMethod (name = AWithSecondaryInit)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+constructor -> UMethod (name = AWithSecondaryInit)
+s -> UParameter (name = s)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    s -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    local -> [!] UnknownKotlinExpression (PROPERTY)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    s -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    local -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+AWithFieldInit -> UClass (name = AWithFieldInit)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+a -> UField (name = a)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/CycleInTypeParameters.identifiers.fir.txt

@@ -0,0 +1,7 @@
+Device -> UClass (name = Device)
+D -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Device -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+D -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+a -> UField (name = a)
+as? -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+Device -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/DefaultImpls.identifiers.fir.txt

@@ -0,0 +1,4 @@
+Foo -> UClass (name = Foo)
+bar -> UMethod (name = bar)
+Baz -> UClass (name = Baz)
+Foo -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/DefaultParameterValues.identifiers.fir.txt

@@ -0,0 +1,5 @@
+foo -> UMethod (name = foo)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UParameter (name = foo)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Delegate.identifiers.fir.txt

@@ -0,0 +1,16 @@
+MyColor -> UClass (name = MyColor)
+x -> UParameter (name = x)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+y -> UParameter (name = y)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+z -> UParameter (name = z)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Some -> UClass (name = Some)
+delegate -> UMethod (name = getDelegate)
+lazy -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    MyColor -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+lambda -> UField (name = lambda)
+lazy -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    MyColor -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+nonLazy -> UField (name = nonLazy)
+MyColor -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/DeprecatedHidden.identifiers.fir.txt

@@ -0,0 +1,10 @@
+test -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+pkg -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Test -> UClass (name = Test)
+test1 -> UMethod (name = test1)
+Deprecated -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+level -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+DeprecationLevel -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+HIDDEN -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+message -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+test2 -> [!] UnknownKotlinExpression (FUN)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/DestructuringDeclaration.identifiers.fir.txt

@@ -0,0 +1,14 @@
+foo -> UMethod (name = foo)
+data -> UParameter (name = data)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+    b -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+    to -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    k -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+    v -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+    data -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    as -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    Pair -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Elvis.identifiers.fir.txt

@@ -0,0 +1,13 @@
+foo -> UMethod (name = foo)
+bar -> UParameter (name = bar)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+baz -> UMethod (name = baz)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    ?: -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    ?: -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ElvisType.identifiers.fir.txt

@@ -0,0 +1,9 @@
+foo -> UMethod (name = foo)
+text -> UParameter (name = text)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+text -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+?: -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+bar -> UMethod (name = bar)
+o -> UParameter (name = o)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/EnumValuesConstructors.identifiers.fir.txt

@@ -0,0 +1,7 @@
+Style -> UClass (name = Style)
+value -> UParameter (name = value)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SYSTEM -> [!] UnknownKotlinExpression (ENUM_ENTRY)
+USER -> [!] UnknownKotlinExpression (ENUM_ENTRY)
+INTERNAL -> [!] UnknownKotlinExpression (ENUM_ENTRY)
+UNKNOWN -> [!] UnknownKotlinExpression (ENUM_ENTRY)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/IfStatement.identifiers.fir.txt

@@ -0,0 +1,3 @@
+foo -> UMethod (name = foo)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    != -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Imports.identifiers.fir.txt

@@ -0,0 +1,23 @@
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Thread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+currentThread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Thread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+NORM_PRIORITY -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Thread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+UncaughtExceptionHandler -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Thread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+sleep -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+kotlin -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+collections -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+emptyList -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+kotlin -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Companion -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SIZE_BYTES -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/In.identifiers.fir.txt

@@ -0,0 +1,11 @@
+foo -> UMethod (name = foo)
+Boolean -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    y -> [!] UnknownKotlinExpression (PROPERTY)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    in -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    .. -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    && -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    y -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    !in -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    .. -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/InferenceInsideUnresolvedConstructor.identifiers.fir.txt

@@ -0,0 +1,11 @@
+bar -> [!] UnknownKotlinExpression (PROPERTY)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+Unresolved -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+id -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+id -> UMethod (name = id)
+x -> UParameter (name = x)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/InnerClasses.identifiers.fir.txt

@@ -0,0 +1,13 @@
+Foo -> UClass (name = Foo)
+Bar -> UClass (name = Bar)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+getAPlusB -> UMethod (name = getAPlusB)
+a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
++ -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Baz -> UClass (name = Baz)
+doNothing -> UMethod (name = doNothing)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/InnerNonFixedTypeVariable.identifiers.fir.txt

@@ -0,0 +1,13 @@
+Some -> UClass (name = Some)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Some -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+test -> UMethod (name = test)
+list -> UParameter (name = list)
+List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    list -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    filterIsInstance -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Some -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mapTo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    mutableSetOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/LambdaReturn.identifiers.fir.txt

@@ -0,0 +1,66 @@
+org -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+jetbrains -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+uast -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+kotlin -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+    lam1 -> [!] UnknownKotlinExpression (PROPERTY)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        b -> [!] UnknownKotlinExpression (PROPERTY)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lam2 -> [!] UnknownKotlinExpression (PROPERTY)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        c -> [!] UnknownKotlinExpression (PROPERTY)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        > -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        c -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        - -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        c -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lam3 -> [!] UnknownKotlinExpression (PROPERTY)
+    lbd -> [!] UnknownKotlinExpression (LABEL)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        d -> [!] UnknownKotlinExpression (PROPERTY)
+        lbd -> [!] UnknownKotlinExpression (LABEL)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        d -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lam4 -> [!] UnknownKotlinExpression (PROPERTY)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        < -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        > -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    lam5 -> [!] UnknownKotlinExpression (PROPERTY)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        it -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        > -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        b -> [!] UnknownKotlinExpression (PROPERTY)
+        it -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        a -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+        b -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+        listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    y -> [!] UnknownKotlinExpression (PROPERTY)
+    Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (FUN)
+lmbd -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lmbd -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Lambdas.identifiers.fir.txt

@@ -0,0 +1,19 @@
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+util -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+stream -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Stream -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+    Stream -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    empty -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    filter -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        it -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        isEmpty -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+doSelectItem -> UMethod (name = doSelectItem)
+selectItemFunction -> UParameter (name = selectItemFunction)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    selectItemFunction -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    baz -> [!] UnknownKotlinExpression (PROPERTY)
+        Local -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    baz -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+lambdaInPlaceCall -> UMethod (name = lambdaInPlaceCall)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/LocalDeclarations.identifiers.fir.txt

@@ -0,0 +1,14 @@
+foo -> UMethod (name = foo)
+Boolean -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Local -> UClass (name = Local)
+    bar -> [!] UnknownKotlinExpression (FUN)
+    Local -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    baz -> [!] UnknownKotlinExpression (PROPERTY)
+        Local -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    someLocalFun -> [!] UnknownKotlinExpression (FUN)
+    text -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    == -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    Local -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/LocalVariableWithAnnotation.identifiers.fir.txt

@@ -0,0 +1,4 @@
+TestAnnotation -> UClass (name = TestAnnotation)
+foo -> UMethod (name = foo)
+    TestAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    bar -> [!] UnknownKotlinExpression (PROPERTY)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ManyAlternatives.identifiers.fir.txt

@@ -0,0 +1,7 @@
+ClassA -> UClass (name = ClassA)
+justParam -> UParameter (name = justParam)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+paramAndProp -> UParameter (name = paramAndProp)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+writebleProp -> UField (name = writebleProp)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/MethodReference.identifiers.fir.txt

@@ -0,0 +1,5 @@
+Foo -> UClass (name = Foo)
+bar -> UMethod (name = bar)
+x -> UField (name = x)
+Foo -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/NameContainingFile.identifiers.fir.txt

@@ -0,0 +1,4 @@
+Foo -> UClass (name = Foo)
+bar -> UMethod (name = bar)
+xyzzy -> UField (name = xyzzy)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/NonTrivialIdentifiers.identifiers.fir.txt

@@ -0,0 +1,17 @@
+A -> UClass (name = A)
+invoke -> UMethod (name = invoke)
+    this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+invoke -> UMethod (name = invoke)
+f -> UParameter (name = f)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+main -> UMethod (name = main)
+a -> UParameter (name = a)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    !! -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    p -> [!] UnknownKotlinExpression (PROPERTY)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    !! -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+        p -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+            A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ParameterPropertyWithAnnotation.identifiers.fir.txt

@@ -0,0 +1,19 @@
+MyAnnotation -> UClass (name = MyAnnotation)
+MyAnnotation2 -> UClass (name = MyAnnotation2)
+MyAnnotation3 -> UClass (name = MyAnnotation3)
+MyAnnotation4 -> UClass (name = MyAnnotation4)
+MyAnnotation5 -> UClass (name = MyAnnotation5)
+Test1 -> UClass (name = Test1)
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UParameter (name = bar)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Test2 -> UClass (name = Test2)
+get -> null
+MyAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+set -> null
+MyAnnotation2 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyAnnotation3 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyAnnotation4 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyAnnotation5 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UParameter (name = bar)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ParametersDisorder.identifiers.fir.txt

@@ -0,0 +1,67 @@
+global -> UMethod (name = global)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+Float -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+withDefault -> UMethod (name = withDefault)
+c -> UParameter (name = c)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+d -> UParameter (name = d)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+withReceiver -> UMethod (name = withReceiver)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+Float -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+call -> UMethod (name = call)
+    global -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    withDefault -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    d -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    withReceiver -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Math -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    atan2 -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    unresolvedMethod -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    format -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    format -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    arrayOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    format -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    arrayOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    arrayOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    format -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    chunked -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    toTypedArray -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    with -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        with2Receivers -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+A -> UClass (name = A)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+with2Receivers -> UMethod (name = with2Receivers)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+Float -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Parent -> UClass (name = Parent)
+a -> UParameter (name = a)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+objectLiteral -> UMethod (name = objectLiteral)
+    object -> UClass (name = null)
+    Parent -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    b -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ParametersWithDefaultValues.identifiers.fir.txt

@@ -0,0 +1,9 @@
+foo -> UMethod (name = foo)
+a -> UParameter (name = a)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+b -> UParameter (name = b)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+c -> UParameter (name = c)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+flag -> UParameter (name = flag)
+Boolean -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyAccessors.identifiers.fir.txt

@@ -0,0 +1,13 @@
+PropertyTest -> UClass (name = PropertyTest)
+stringRepresentation -> [!] UnknownKotlinExpression (PROPERTY)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+set -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+value -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    setDataFromString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    value -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+setDataFromString -> UMethod (name = setDataFromString)
+data -> UParameter (name = data)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyDelegate.identifiers.fir.txt

@@ -0,0 +1,9 @@
+sdCardPath -> UMethod (name = getSdCardPath)
+lazy -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+localPropertyTest -> UMethod (name = localPropertyTest)
+    sdCardPathLocal -> [!] UnknownKotlinExpression (PROPERTY)
+    lazy -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+annotatedDelegate -> UMethod (name = getAnnotatedDelegate)
+lazy -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyInitializer.identifiers.fir.txt

@@ -0,0 +1,9 @@
+TestPropertyInitializer -> UClass (name = TestPropertyInitializer)
+withSetter -> [!] UnknownKotlinExpression (PROPERTY)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+field -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+set -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+p -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    field -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    p -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyInitializerWithoutSetter.identifiers.fir.txt

@@ -0,0 +1,3 @@
+withoutSetter -> UField (name = withoutSetter)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+field -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyReferences.identifiers.fir.txt

@@ -0,0 +1,53 @@
+A -> UClass (name = A)
+init -> UParameter (name = init)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+privateProp -> UField (name = privateProp)
+mutableProp -> UField (name = mutableProp)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    init -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+add -> UMethod (name = add)
+x -> UParameter (name = x)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    result -> [!] UnknownKotlinExpression (PROPERTY)
+    privateProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    privateProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    privateProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+properties -> UMethod (name = properties)
+    a -> [!] UnknownKotlinExpression (PROPERTY)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    - -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    += -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ++ -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    -- -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+ext -> UMethod (name = ext)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    - -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    += -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    x -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ++ -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    mutableProp -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    -- -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/PropertyWithAnnotation.identifiers.fir.txt

@@ -0,0 +1,19 @@
+TestAnnotation -> UClass (name = TestAnnotation)
+TestAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+prop1 -> UField (name = prop1)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> null
+TestAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+prop2 -> [!] UnknownKotlinExpression (PROPERTY)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+set -> null
+TestAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+prop3 -> [!] UnknownKotlinExpression (PROPERTY)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+set -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+value -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    field -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    value -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/QualifiedConstructorCall.identifiers.fir.txt

@@ -0,0 +1,11 @@
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+C -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Foo -> UClass (name = Foo)
+Bar -> UClass (name = Bar)
+getFoo -> UMethod (name = getFoo)
+Foo -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    C -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ReceiverFun.identifiers.fir.txt

@@ -0,0 +1,14 @@
+MyReceiverAnnotation -> UClass (name = MyReceiverAnnotation)
+name -> UMethod (name = name)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyReceiverAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+length -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+MyReceiverAnnotation -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+rx -> [!] UnknownKotlinExpression (PROPERTY)
+Regex -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+get -> [!] UnknownKotlinExpression (PROPERTY_ACCESSOR)
+    toRegex -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Reified.identifiers.fir.txt

@@ -0,0 +1,23 @@
+test -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+pkg -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Context -> UClass (name = Context)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+ownSystemService1 -> [!] UnknownKotlinExpression (FUN)
+getSystemService -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+ownSystemService2 -> [!] UnknownKotlinExpression (FUN)
+getSystemService -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Context -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+systemService1 -> [!] UnknownKotlinExpression (FUN)
+getSystemService -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Context -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+systemService2 -> [!] UnknownKotlinExpression (FUN)
+getSystemService -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ReifiedParameters.identifiers.fir.txt

@@ -0,0 +1,47 @@
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+functionWithLambda -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+process -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+process -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+functionWithVararg -> [!] UnknownKotlinExpression (FUN)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+functionWithReceiver -> [!] UnknownKotlinExpression (FUN)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+`name with spaces` -> [!] UnknownKotlinExpression (FUN)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+functionWithParamAnnotation -> [!] UnknownKotlinExpression (FUN)
+Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+functionUnresolved -> [!] UnknownKotlinExpression (FUN)
+Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Unresolved -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ReifiedResolve.identifiers.fir.txt

@@ -0,0 +1,31 @@
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> [!] UnknownKotlinExpression (FUN)
+init -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    TODO -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (FUN)
+init -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    TODO -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+resolve -> UMethod (name = resolve)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    x -> [!] UnknownKotlinExpression (PROPERTY)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    y -> [!] UnknownKotlinExpression (PROPERTY)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    z -> [!] UnknownKotlinExpression (PROPERTY)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    filterIsInstance -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ReifiedReturnType.identifiers.fir.txt

@@ -0,0 +1,171 @@
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function1 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function2 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function2CharSequence -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function3 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function4 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function5 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Activity -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function6 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function7 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function8 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function9 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+function10 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function11 -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function11CharSequence -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function12CharSequence -> [!] UnknownKotlinExpression (FUN)
+t -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+s -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+B -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+copyWhenGreater -> UMethod (name = copyWhenGreater)
+list -> UParameter (name = list)
+List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+threshold -> UParameter (name = threshold)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+threshold2 -> UParameter (name = threshold2)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+CharSequence -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Comparable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    threshold2 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Foo -> UClass (name = Foo)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Z -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> [!] UnknownKotlinExpression (FUN)
+Z -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    TODO -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Resolve.identifiers.fir.txt

@@ -0,0 +1,62 @@
+A -> UClass (name = A)
+foo -> UMethod (name = foo)
+inlineFoo -> [!] UnknownKotlinExpression (FUN)
+bar -> UMethod (name = bar)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    inlineFoo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    A -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    forEach -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        it -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    joinToString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    size -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    indices -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    date -> [!] UnknownKotlinExpression (PROPERTY)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    util -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Date -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    util -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Date -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    date -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    time -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    last -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    mutableMapOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    to -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    entries -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    first -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    setValue -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    intRange -> [!] UnknownKotlinExpression (PROPERTY)
+    .. -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    intRange -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    contains -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    as -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    IntRange -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+barT -> UMethod (name = barT)
+t -> UParameter (name = t)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    t -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+barTL -> UMethod (name = barTL)
+listT -> UParameter (name = listT)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    listT -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    isEmpty -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    listT -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/SAM.identifiers.fir.txt

@@ -0,0 +1,67 @@
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Thread -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+util -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+concurrent -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Callable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+util -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+function -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Supplier -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+notSam -> UField (name = notSam)
+foo -> UField (name = foo)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    = -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    a -> [!] UnknownKotlinExpression (PROPERTY)
+    as -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    runRunnable -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+baz -> UField (name = baz)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Runnable -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+runRunnable -> UMethod (name = runRunnable)
+r -> UParameter (name = r)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Runnable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+r -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+test1 -> UMethod (name = test1)
+    thread1 -> [!] UnknownKotlinExpression (PROPERTY)
+    Thread -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+test2 -> UMethod (name = test2)
+    thread2 -> [!] UnknownKotlinExpression (PROPERTY)
+    Thread -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Runnable -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+test3 -> UMethod (name = test3)
+    ambiguousSamAcceptor -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Supplier -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    ambiguousSamAcceptor -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Callable -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+ambiguousSamAcceptor -> UMethod (name = ambiguousSamAcceptor)
+s -> UParameter (name = s)
+Supplier -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+TODO -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+ambiguousSamAcceptor -> UMethod (name = ambiguousSamAcceptor)
+s -> UParameter (name = s)
+Callable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+TODO -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Simple.identifiers.fir.txt

@@ -0,0 +1,5 @@
+Simple -> UClass (name = Simple)
+method -> UMethod (name = method)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+property -> UField (name = property)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/SimpleAnnotated.identifiers.fir.txt

@@ -0,0 +1,8 @@
+SimpleAnnotated -> UClass (name = SimpleAnnotated)
+Suppress -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+method -> UMethod (name = method)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+kotlin -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SinceKotlin -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+property -> UField (name = property)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/StringTemplate.identifiers.fir.txt

@@ -0,0 +1,7 @@
+foo -> UField (name = foo)
+bar -> UField (name = bar)
+baz -> UField (name = baz)
+foobarbaz -> UField (name = foobarbaz)
+foo -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+baz -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/StringTemplateComplex.identifiers.fir.txt

@@ -0,0 +1,20 @@
+muchRecur -> UField (name = muchRecur)
+case4 -> UField (name = case4)
+case5 -> UField (name = case5)
+literalInLiteral -> UField (name = literalInLiteral)
+case4 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+literalInLiteral2 -> UField (name = literalInLiteral2)
+case4 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+repeat -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+empty -> UField (name = empty)
+simpleForTemplate -> UMethod (name = simpleForTemplate)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    baz -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    template1 -> [!] UnknownKotlinExpression (PROPERTY)
+    simpleForTemplate -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    template2 -> [!] UnknownKotlinExpression (PROPERTY)
+    simpleForTemplate -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/StringTemplateComplexForUInjectionHost.identifiers.fir.txt

@@ -0,0 +1,20 @@
+muchRecur -> UField (name = muchRecur)
+case4 -> UField (name = case4)
+case5 -> UField (name = case5)
+literalInLiteral -> UField (name = literalInLiteral)
+case4 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+literalInLiteral2 -> UField (name = literalInLiteral2)
+case4 -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+repeat -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+empty -> UField (name = empty)
+simpleForTemplate -> UMethod (name = simpleForTemplate)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    baz -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    template1 -> [!] UnknownKotlinExpression (PROPERTY)
+    simpleForTemplate -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    template2 -> [!] UnknownKotlinExpression (PROPERTY)
+    simpleForTemplate -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/StringTemplateInClass.identifiers.fir.txt

@@ -0,0 +1,4 @@
+Demo -> UClass (name = Demo)
+foo -> UField (name = foo)
+X -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/StringTemplateWithVar.identifiers.fir.txt

@@ -0,0 +1,3 @@
+bar -> UField (name = bar)
+f -> UField (name = f)
+bar -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/SuperCalls.identifiers.fir.txt

@@ -0,0 +1,50 @@
+A -> UClass (name = A)
+str -> UParameter (name = str)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+constructor -> UMethod (name = A)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+this -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+foo -> UMethod (name = foo)
+a -> UParameter (name = a)
+Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+B -> UClass (name = B)
+param -> UParameter (name = param)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+param -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+C -> UClass (name = C)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+constructor -> UMethod (name = C)
+p -> UParameter (name = p)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+super -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+p -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+constructor -> UMethod (name = C)
+i -> UParameter (name = i)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+super -> [!] UnknownKotlinExpression (CONSTRUCTOR_DELEGATION_REFERENCE)
+i -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    println -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+foo -> UMethod (name = foo)
+a -> UParameter (name = a)
+Long -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    super -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    foo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+O -> UClass (name = O)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+anon -> UField (name = anon)
+object -> UClass (name = null)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+    cons -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    object -> UClass (name = null)
+    A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+InnerClass -> UClass (name = InnerClass)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+cons -> UMethod (name = cons)
+a -> UParameter (name = a)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/Suspend.identifiers.fir.txt

@@ -0,0 +1,13 @@
+test -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+pkg -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Context -> UClass (name = Context)
+inner -> UMethod (name = inner)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+suspendPrivate -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+suspendPrivate -> UMethod (name = suspendPrivate)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+inner -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+top -> UMethod (name = top)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Context -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+inner -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/TryCatch.identifiers.fir.txt

@@ -0,0 +1,26 @@
+TryCatch -> UClass (name = TryCatch)
+catches -> UMethod (name = catches)
+        body -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    e -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Throwable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        catcher -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        finalizer -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+body -> UMethod (name = body)
+catcher -> UMethod (name = catcher)
+finalizer -> UMethod (name = finalizer)
+TryCatchAnnotations -> UClass (name = TryCatchAnnotations)
+java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+SuppressWarnings -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+catches -> UMethod (name = catches)
+        body -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    lang -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    SuppressWarnings -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    e -> [!] UnknownKotlinExpression (VALUE_PARAMETER)
+    Throwable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        catcher -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        finalizer -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+body -> UMethod (name = body)
+catcher -> UMethod (name = catcher)
+finalizer -> UMethod (name = finalizer)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/TypeAliasExpansionWithOtherAliasInArgument.identifiers.fir.txt

@@ -0,0 +1,23 @@
+A -> [!] UnknownKotlinExpression (TYPEALIAS)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+My -> [!] UnknownKotlinExpression (TYPEALIAS)
+Map -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Unit -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+My -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)
+x -> UParameter (name = x)
+My -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+My -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Map -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> UMethod (name = bar)
+x -> UParameter (name = x)
+Map -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Map -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/TypeAliases.identifiers.fir.txt

@@ -0,0 +1,8 @@
+A -> UClass (name = A)
+F -> [!] UnknownKotlinExpression (TYPEALIAS)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+A -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+G -> [!] UnknownKotlinExpression (TYPEALIAS)
+F -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+F -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/TypeInAnnotation.identifiers.fir.txt

@@ -0,0 +1,3 @@
+C -> UClass (name = C)
+Test -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+foo -> UMethod (name = foo)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/TypeReferences.identifiers.fir.txt

@@ -0,0 +1,52 @@
+foo -> UMethod (name = foo)
+parameter -> UParameter (name = parameter)
+Int -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    varWithType -> [!] UnknownKotlinExpression (PROPERTY)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    varWithoutType -> [!] UnknownKotlinExpression (PROPERTY)
+    result -> [!] UnknownKotlinExpression (PROPERTY)
+    varWithType -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    + -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    varWithoutType -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    result -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+ListOfLists -> [!] UnknownKotlinExpression (TYPEALIAS)
+List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+parameterizedFoo -> UMethod (name = parameterizedFoo)
+arg -> UParameter (name = arg)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    a -> [!] UnknownKotlinExpression (PROPERTY)
+    arg -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    at -> [!] UnknownKotlinExpression (PROPERTY)
+    T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    arg -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    ?: -> [!] UnknownKotlinExpression (OPERATION_REFERENCE)
+    tl -> [!] UnknownKotlinExpression (PROPERTY)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    at -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    tsl -> [!] UnknownKotlinExpression (PROPERTY)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    tl -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    map -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+        it -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        toString -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    lls -> [!] UnknownKotlinExpression (PROPERTY)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    llsAliased -> [!] UnknownKotlinExpression (PROPERTY)
+    ListOfLists -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    llt -> [!] UnknownKotlinExpression (PROPERTY)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    parameterizedFoo -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    List -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    emptyList -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/UnexpectedContainerException.identifiers.fir.txt

@@ -0,0 +1,23 @@
+Callback -> UClass (name = Callback)
+onError -> UMethod (name = onError)
+throwable -> UParameter (name = throwable)
+Throwable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+Model -> UClass (name = Model)
+    crashMe -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    Callback -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    java -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        object -> UClass (name = null)
+        Callback -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        onError -> UMethod (name = onError)
+        throwable -> UParameter (name = throwable)
+        Throwable -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+            UnsupportedOperationException -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+T -> [!] UnknownKotlinExpression (TYPE_PARAMETER)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+crashMe -> UMethod (name = crashMe)
+clazz -> UParameter (name = clazz)
+Class -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+factory -> UParameter (name = factory)
+T -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    UnsupportedOperationException -> [!] UnknownKotlinExpression (CALL_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/WhenAndDestructing.identifiers.fir.txt

@@ -0,0 +1,11 @@
+getElementsAdditionalResolve -> UMethod (name = getElementsAdditionalResolve)
+string -> UParameter (name = string)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+    arr -> [!] UnknownKotlinExpression (PROPERTY)
+    listOf -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+    string -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        bindingContext -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+        statementFilter -> [!] UnknownKotlinExpression (DESTRUCTURING_DECLARATION_ENTRY)
+        arr -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+        bindingContext -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/WhenIs.identifiers.fir.txt

@@ -0,0 +1,7 @@
+foo -> UMethod (name = foo)
+bar -> UParameter (name = bar)
+Any -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+bar -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+String -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)

plugins/uast-kotlin-fir/testData/legacyIdentifiers/WhenStringLiteral.identifiers.fir.txt

@@ -0,0 +1,7 @@
+a -> UField (name = a)
+readLine -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+b -> UField (name = b)
+a -> [!] UnknownKotlinExpression (REFERENCE_EXPRESSION)
+a -> null
+    println -> null
+    println -> null

plugins/uast-kotlin-fir/testData/legacyIdentifiers/ea101715.identifiers.fir.txt

@@ -0,0 +1,4 @@
+a -> UMethod (name = a)
+    a -> [!] UnknownKotlinExpression (PROPERTY)
+    Obj -> [!] UnknownKotlinExpression (CALL_EXPRESSION)
+Obj -> UClass (name = Obj)

plugins/uast-kotlin-fir/tests/org/jetbrains/uast/test/common/kotlin/FirUastIdentifiersTestBase.kt

@@ -55,6 +55,9 @@ interface FirUastIdentifiersTestBase : FirUastPluginSelection, FirUastFileCompar
             }
         } catch (e: AssertionError) {
             if (!isExpectedToFail(filePath)) throw e
+        } catch (e: NotImplementedError) {
+            // TODO: Remove this catch once parent conversion in FIR UAST is implemented
+            if (!isExpectedToFail(filePath)) throw e
         }
 
         cleanUpIdenticalFile(

plugins/uast-kotlin-fir/tests/org/jetbrains/uast/test/kotlin/AbstractFirLegacyUastIdentifiersTest.kt

@@ -10,7 +10,7 @@ import org.jetbrains.uast.test.common.kotlin.FirLegacyUastIdentifiersTestBase
 
 abstract class AbstractFirLegacyUastIdentifiersTest : AbstractFirUastIdentifiersTest(), FirLegacyUastIdentifiersTestBase {
     override fun isExpectedToFail(filePath: String): Boolean {
-        // TODO: investigate why everything is failing!
+        // TODO: Implement parent conversion in FIR UAST
         return true
     }
 

plugins/uast-kotlin/src/org/jetbrains/uast/kotlin/KotlinConverter.kt

@@ -44,12 +44,6 @@ internal object KotlinConverter {
         else -> element
     }
 
-    private val identifiersTokens = setOf(
-        KtTokens.IDENTIFIER, KtTokens.CONSTRUCTOR_KEYWORD, KtTokens.OBJECT_KEYWORD,
-        KtTokens.THIS_KEYWORD, KtTokens.SUPER_KEYWORD,
-        KtTokens.GET_KEYWORD, KtTokens.SET_KEYWORD
-    )
-
     internal fun convertPsiElement(
         element: PsiElement?,
         givenParent: UElement?,