K2: Rename delegateProvider in node for delegate and refine its type

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/lazy/resolve/FirLazyBodiesCalculator.kt

@@ -17,7 +17,6 @@ import org.jetbrains.kotlin.fir.builder.PsiRawFirBuilder
 import org.jetbrains.kotlin.fir.contracts.FirRawContractDescription
 import org.jetbrains.kotlin.fir.contracts.impl.FirEmptyContractDescription
 import org.jetbrains.kotlin.fir.declarations.*
-import org.jetbrains.kotlin.fir.declarations.annotationPlatformSupport
 import org.jetbrains.kotlin.fir.declarations.utils.getExplicitBackingField
 import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.expressions.impl.FirLazyDelegatedConstructorCall
@@ -243,16 +242,7 @@ private fun rebindDelegate(newTarget: FirProperty, oldTarget: FirProperty) {
         withFirEntry("delegate", delegate)
     }
 
-    val delegateProvider = delegate.delegateProvider
-    requireWithAttachment(
-        delegateProvider is FirFunctionCall,
-        { "Unexpected delegate provider type: ${delegateProvider::class.simpleName}" },
-    ) {
-        withFirEntry("newTarget", newTarget)
-        withFirEntry("oldTarget", oldTarget)
-        withFirEntry("expression", delegateProvider)
-    }
-
+    val delegateProvider = delegate.provideDelegateCall
     rebindArgumentList(
         delegateProvider.argumentList,
         newTarget = newTarget.symbol,

compiler/fir/raw-fir/raw-fir.common/src/org/jetbrains/kotlin/fir/builder/ConversionUtils.kt

@@ -6,7 +6,6 @@
 package org.jetbrains.kotlin.fir.builder
 
 import com.intellij.psi.tree.IElementType
-import org.jetbrains.kotlin.*
 import org.jetbrains.kotlin.KtFakeSourceElementKind
 import org.jetbrains.kotlin.KtRealSourceElementKind
 import org.jetbrains.kotlin.KtSourceElement
@@ -14,15 +13,12 @@ import org.jetbrains.kotlin.contracts.description.LogicOperationKind
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationUseSiteTarget
+import org.jetbrains.kotlin.fakeElement
 import org.jetbrains.kotlin.fir.*
 import org.jetbrains.kotlin.fir.contracts.FirContractDescription
 import org.jetbrains.kotlin.fir.contracts.FirLegacyRawContractDescription
 import org.jetbrains.kotlin.fir.contracts.builder.buildLegacyRawContractDescription
-import org.jetbrains.kotlin.fir.declarations.FirCallableDeclaration
-import org.jetbrains.kotlin.fir.declarations.FirDeclarationOrigin
-import org.jetbrains.kotlin.fir.declarations.FirFunction
-import org.jetbrains.kotlin.fir.declarations.FirReceiverParameter
-import org.jetbrains.kotlin.fir.declarations.FirVariable
+import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.builder.*
 import org.jetbrains.kotlin.fir.declarations.impl.FirDeclarationStatusImpl
 import org.jetbrains.kotlin.fir.declarations.impl.FirDefaultPropertyAccessor
@@ -41,16 +37,9 @@ import org.jetbrains.kotlin.fir.symbols.impl.FirClassSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirDelegateFieldSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirPropertyAccessorSymbol
 import org.jetbrains.kotlin.fir.symbols.impl.FirValueParameterSymbol
-import org.jetbrains.kotlin.fir.types.ConeClassLikeType
-import org.jetbrains.kotlin.fir.types.ConeKotlinTypeProjectionOut
-import org.jetbrains.kotlin.fir.types.ConeStarProjection
-import org.jetbrains.kotlin.fir.types.FirErrorTypeRef
-import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
-import org.jetbrains.kotlin.fir.types.FirTypeRef
+import org.jetbrains.kotlin.fir.types.*
 import org.jetbrains.kotlin.fir.types.builder.buildResolvedTypeRef
 import org.jetbrains.kotlin.fir.types.builder.buildTypeProjectionWithVariance
-import org.jetbrains.kotlin.fir.types.coneType
-import org.jetbrains.kotlin.fir.types.constructClassLikeType
 import org.jetbrains.kotlin.fir.types.impl.ConeTypeParameterTypeImpl
 import org.jetbrains.kotlin.fir.types.impl.FirImplicitTypeRefImplWithoutSource
 import org.jetbrains.kotlin.lexer.KtTokens
@@ -431,7 +420,7 @@ fun <T> FirPropertyBuilder.generateAccessorsByDelegate(
     }
 
     delegate = lazyDelegateExpression ?: run {
-        delegateBuilder.delegateProvider = buildFunctionCall {
+        delegateBuilder.provideDelegateCall = buildFunctionCall {
             explicitReceiver = delegateBuilder.expression
             calleeReference = buildSimpleNamedReference {
                 source = fakeSource

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirDeclarationsResolveTransformer.kt

@@ -404,7 +404,7 @@ open class FirDeclarationsResolveTransformer(
         val delegateExpression = wrappedDelegateExpression.expression.transformSingle(transformer, ResolutionMode.ContextDependent.Delegate)
             .transformSingle(components.integerLiteralAndOperatorApproximationTransformer, null)
 
-        val provideDelegateCall = wrappedDelegateExpression.delegateProvider as FirFunctionCall
+        val provideDelegateCall = wrappedDelegateExpression.provideDelegateCall
         provideDelegateCall.replaceExplicitReceiver(delegateExpression)
 
         // Resolve call for provideDelegate, without completion

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/FirWrappedDelegateExpression.kt

@@ -23,7 +23,7 @@ abstract class FirWrappedDelegateExpression : FirWrappedExpression() {
     abstract override val coneTypeOrNull: ConeKotlinType?
     abstract override val annotations: List<FirAnnotation>
     abstract override val expression: FirExpression
-    abstract val delegateProvider: FirExpression
+    abstract val provideDelegateCall: FirFunctionCall
 
     override fun <R, D> accept(visitor: FirVisitor<R, D>, data: D): R =
         visitor.visitWrappedDelegateExpression(this, data)

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/builder/FirWrappedDelegateExpressionBuilder.kt

@@ -17,6 +17,7 @@ import org.jetbrains.kotlin.fir.builder.FirBuilderDsl
 import org.jetbrains.kotlin.fir.builder.toMutableOrEmpty
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
 import org.jetbrains.kotlin.fir.expressions.FirWrappedDelegateExpression
 import org.jetbrains.kotlin.fir.expressions.impl.FirWrappedDelegateExpressionImpl
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
@@ -26,14 +27,14 @@ class FirWrappedDelegateExpressionBuilder : FirAnnotationContainerBuilder, FirEx
     override var source: KtSourceElement? = null
     override val annotations: MutableList<FirAnnotation> = mutableListOf()
     lateinit var expression: FirExpression
-    lateinit var delegateProvider: FirExpression
+    lateinit var provideDelegateCall: FirFunctionCall
 
     override fun build(): FirWrappedDelegateExpression {
         return FirWrappedDelegateExpressionImpl(
             source,
             annotations.toMutableOrEmpty(),
             expression,
-            delegateProvider,
+            provideDelegateCall,
         )
     }
 

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/expressions/impl/FirWrappedDelegateExpressionImpl.kt

@@ -13,10 +13,7 @@ package org.jetbrains.kotlin.fir.expressions.impl
 import org.jetbrains.kotlin.KtSourceElement
 import org.jetbrains.kotlin.fir.MutableOrEmptyList
 import org.jetbrains.kotlin.fir.builder.toMutableOrEmpty
-import org.jetbrains.kotlin.fir.expressions.FirAnnotation
-import org.jetbrains.kotlin.fir.expressions.FirExpression
-import org.jetbrains.kotlin.fir.expressions.FirWrappedDelegateExpression
-import org.jetbrains.kotlin.fir.expressions.UnresolvedExpressionTypeAccess
+import org.jetbrains.kotlin.fir.expressions.*
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.visitors.FirTransformer
 import org.jetbrains.kotlin.fir.visitors.FirVisitor
@@ -26,7 +23,7 @@ internal class FirWrappedDelegateExpressionImpl(
     override val source: KtSourceElement?,
     override var annotations: MutableOrEmptyList<FirAnnotation>,
     override var expression: FirExpression,
-    override var delegateProvider: FirExpression,
+    override var provideDelegateCall: FirFunctionCall,
 ) : FirWrappedDelegateExpression() {
     @OptIn(UnresolvedExpressionTypeAccess::class)
     override val coneTypeOrNull: ConeKotlinType?
@@ -35,13 +32,13 @@ internal class FirWrappedDelegateExpressionImpl(
     override fun <R, D> acceptChildren(visitor: FirVisitor<R, D>, data: D) {
         annotations.forEach { it.accept(visitor, data) }
         expression.accept(visitor, data)
-        delegateProvider.accept(visitor, data)
+        provideDelegateCall.accept(visitor, data)
     }
 
     override fun <D> transformChildren(transformer: FirTransformer<D>, data: D): FirWrappedDelegateExpressionImpl {
         transformAnnotations(transformer, data)
         expression = expression.transform(transformer, data)
-        delegateProvider = delegateProvider.transform(transformer, data)
+        provideDelegateCall = provideDelegateCall.transform(transformer, data)
         return this
     }
 

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -665,7 +665,7 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
         }
 
         wrappedDelegateExpression.configure {
-            +field("delegateProvider", expression)
+            +field("provideDelegateCall", functionCall)
         }
 
         enumEntryDeserializedAccessExpression.configure {