[FIR] Add accessors to parts of signatures to symbols

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/FirBasedSymbol.kt

@@ -5,7 +5,10 @@
 
 package org.jetbrains.kotlin.fir.symbols
 
+import org.jetbrains.kotlin.fir.FirModuleData
+import org.jetbrains.kotlin.fir.FirSourceElement
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
+import org.jetbrains.kotlin.fir.declarations.FirDeclarationOrigin
 
 abstract class FirBasedSymbol<E : FirDeclaration> {
     private var _fir: E? = null
@@ -17,4 +20,13 @@ abstract class FirBasedSymbol<E : FirDeclaration> {
     fun bind(e: E) {
         _fir = e
     }
+
+    val origin: FirDeclarationOrigin
+        get() = fir.origin
+
+    val source: FirSourceElement?
+        get() = fir.source
+
+    val moduleData: FirModuleData
+        get() = fir.moduleData
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirCallableSymbol.kt

@@ -5,16 +5,59 @@
 
 package org.jetbrains.kotlin.fir.symbols.impl
 
-import org.jetbrains.kotlin.fir.declarations.FirCallableDeclaration
-import org.jetbrains.kotlin.fir.declarations.FirFunction
-import org.jetbrains.kotlin.fir.declarations.FirProperty
-import org.jetbrains.kotlin.fir.declarations.FirMemberDeclaration
+import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
+import org.jetbrains.kotlin.fir.symbols.ensureResolved
+import org.jetbrains.kotlin.fir.types.*
 import org.jetbrains.kotlin.name.CallableId
+import org.jetbrains.kotlin.name.Name
 
 abstract class FirCallableSymbol<D : FirCallableDeclaration> : FirBasedSymbol<D>() {
     abstract val callableId: CallableId
 
+    val resolvedReturnTypeRef: FirResolvedTypeRef
+        get() {
+            ensureType(fir.returnTypeRef)
+            return fir.returnTypeRef as FirResolvedTypeRef
+        }
+
+    val resolvedReceiverTypeRef: FirResolvedTypeRef?
+        get() {
+            ensureType(fir.receiverTypeRef)
+            return fir.receiverTypeRef as FirResolvedTypeRef?
+        }
+
+    val resolvedStatus: FirResolvedDeclarationStatus
+        get() {
+            ensureResolved(FirResolvePhase.STATUS)
+            return fir.status as FirResolvedDeclarationStatus
+        }
+
+    val typeParameterSymbols: List<FirTypeParameterSymbol>
+        get() {
+            return fir.typeParameters.map { it.symbol }
+        }
+
+    val dispatchReceiverType: ConeKotlinType?
+        get() = fir.dispatchReceiverType
+
+    val name: Name
+        get() = callableId.callableName
+
+    val deprecation: DeprecationsPerUseSite?
+        get() {
+            ensureResolved(FirResolvePhase.STATUS)
+            return fir.deprecation
+        }
+
+    private fun ensureType(typeRef: FirTypeRef?) {
+        when (typeRef) {
+            null, is FirResolvedTypeRef -> {}
+            is FirImplicitTypeRef -> ensureResolved(FirResolvePhase.IMPLICIT_TYPES_BODY_RESOLVE)
+            else -> ensureResolved(FirResolvePhase.TYPES)
+        }
+    }
+
     override fun toString(): String = "${this::class.simpleName} $callableId"
 }
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt

@@ -5,8 +5,12 @@
 
 package org.jetbrains.kotlin.fir.symbols.impl
 
+import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.symbols.ConeClassLikeLookupTag
+import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
+import org.jetbrains.kotlin.fir.symbols.ensureResolved
+import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -20,19 +24,62 @@ sealed class FirClassLikeSymbol<D : FirClassLikeDeclaration>(
 }
 
 sealed class FirClassSymbol<C : FirClass>(classId: ClassId) : FirClassLikeSymbol<C>(classId) {
-    private val lookupTag =
+    private val lookupTag: ConeClassLikeLookupTag =
         if (classId.isLocal) ConeClassLookupTagWithFixedSymbol(classId, this)
         else ConeClassLikeLookupTagImpl(classId)
 
     override fun toLookupTag(): ConeClassLikeLookupTag = lookupTag
+
+    val resolvedSuperTypeRefs: List<FirResolvedTypeRef>
+        get() {
+            ensureResolved(FirResolvePhase.SUPER_TYPES)
+            @Suppress("UNCHECKED_CAST")
+            return fir.superTypeRefs as List<FirResolvedTypeRef>
+        }
+
+    val declarationSymbols: List<FirBasedSymbol<*>>
+        get() {
+            return fir.declarations.map { it.symbol }
+        }
+
+    val typeParameterSymbols: List<FirTypeParameterSymbol>
+        get() {
+            return fir.typeParameters.map { it.symbol }
+        }
+
+    val classKind: ClassKind
+        get() = fir.classKind
 }
 
-class FirRegularClassSymbol(classId: ClassId) : FirClassSymbol<FirRegularClass>(classId)
+class FirRegularClassSymbol(classId: ClassId) : FirClassSymbol<FirRegularClass>(classId) {
+    val resolvedStatus: FirResolvedDeclarationStatus
+        get() {
+            ensureResolved(FirResolvePhase.STATUS)
+            return fir.status as FirResolvedDeclarationStatus
+        }
+}
 
 val ANONYMOUS_CLASS_ID = ClassId(FqName.ROOT, FqName.topLevel(Name.special("<anonymous>")), true)
 
 class FirAnonymousObjectSymbol : FirClassSymbol<FirAnonymousObject>(ANONYMOUS_CLASS_ID)
 
 class FirTypeAliasSymbol(classId: ClassId) : FirClassLikeSymbol<FirTypeAlias>(classId) {
-    override fun toLookupTag() = ConeClassLikeLookupTagImpl(classId)
+    override fun toLookupTag(): ConeClassLikeLookupTag = ConeClassLikeLookupTagImpl(classId)
+
+    val resolvedStatus: FirResolvedDeclarationStatus
+        get() {
+            ensureResolved(FirResolvePhase.STATUS)
+            return fir.status as FirResolvedDeclarationStatus
+        }
+
+    val resolvedExpandedTypeRef: FirResolvedTypeRef
+        get() {
+            ensureResolved(FirResolvePhase.SUPER_TYPES)
+            return fir.expandedTypeRef as FirResolvedTypeRef
+        }
+
+    val typeParameterSymbols: List<FirTypeParameterSymbol>
+        get() {
+            return fir.typeParameters.map { it.symbol }
+        }
 }

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirFunctionSymbol.kt

@@ -5,16 +5,30 @@
 
 package org.jetbrains.kotlin.fir.symbols.impl
 
+import org.jetbrains.kotlin.fir.contracts.FirResolvedContractDescription
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.symbols.AccessorSymbol
-import org.jetbrains.kotlin.fir.types.ConeKotlinType
+import org.jetbrains.kotlin.fir.symbols.ensureResolved
 import org.jetbrains.kotlin.name.CallableId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 
 sealed class FirFunctionSymbol<D : FirFunction>(
     override val callableId: CallableId
-) : FirCallableSymbol<D>()
+) : FirCallableSymbol<D>() {
+    val valueParameterSymbols: List<FirValueParameterSymbol>
+        get() = fir.valueParameters.map { it.symbol }
+
+    val resolvedContractDescription: FirResolvedContractDescription?
+        get() {
+            ensureResolved(FirResolvePhase.CONTRACTS)
+            return when (this) {
+                is FirNamedFunctionSymbol -> fir.contractDescription
+                is FirPropertyAccessorSymbol -> fir.contractDescription
+                else -> null
+            } as? FirResolvedContractDescription
+        }
+}
 
 // ------------------------ named ------------------------
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirTypeParameterSymbol.kt

@@ -5,12 +5,15 @@
 
 package org.jetbrains.kotlin.fir.symbols.impl
 
+import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
 import org.jetbrains.kotlin.fir.declarations.FirTypeParameter
 import org.jetbrains.kotlin.fir.symbols.ConeTypeParameterLookupTag
+import org.jetbrains.kotlin.fir.symbols.ensureResolved
+import org.jetbrains.kotlin.fir.types.FirResolvedTypeRef
 import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.types.Variance
 
 class FirTypeParameterSymbol : FirClassifierSymbol<FirTypeParameter>() {
-
     val name: Name
         get() = fir.name
 
@@ -19,5 +22,18 @@ class FirTypeParameterSymbol : FirClassifierSymbol<FirTypeParameter>() {
     override fun toLookupTag(): ConeTypeParameterLookupTag = lookupTag
 
     override fun toString(): String = "${this::class.simpleName} ${name.asString()}"
+
+    val resolvedBounds: List<FirResolvedTypeRef>
+        get() {
+            ensureResolved(FirResolvePhase.TYPES)
+            @Suppress("UNCHECKED_CAST")
+            return fir.bounds as List<FirResolvedTypeRef>
+        }
+
+    val variance: Variance
+        get() = fir.variance
+
+    val isReified: Boolean
+        get() = fir.isReified
 }
 

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirVariableSymbol.kt

@@ -7,7 +7,8 @@ package org.jetbrains.kotlin.fir.symbols.impl
 
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.diagnostics.ConeDiagnostic
-import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.references.FirControlFlowGraphReference
+import org.jetbrains.kotlin.fir.symbols.ensureResolved
 import org.jetbrains.kotlin.name.CallableId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
@@ -19,6 +20,33 @@ open class FirPropertySymbol(
 ) : FirVariableSymbol<FirProperty>(callableId) {
     // TODO: should we use this constructor for local variables?
     constructor(name: Name) : this(CallableId(name))
+
+    val isLocal: Boolean
+        get() = fir.isLocal
+
+    val getterSymbol: FirPropertyAccessorSymbol?
+        get() = fir.getter?.symbol
+
+    val setterSymbol: FirPropertyAccessorSymbol?
+        get() = fir.setter?.symbol
+
+    val hasInitializer: Boolean
+        get() = fir.initializer != null
+
+    val hasDelegate: Boolean
+        get() = fir.delegate != null
+
+    val controlFlowGraphReference: FirControlFlowGraphReference?
+        get() {
+            ensureResolved(FirResolvePhase.BODY_RESOLVE)
+            return fir.controlFlowGraphReference
+        }
+
+    val isVal: Boolean
+        get() = fir.isVal
+
+    val isVar: Boolean
+        get() = fir.isVar
 }
 
 class FirIntersectionOverridePropertySymbol(
@@ -26,20 +54,36 @@ class FirIntersectionOverridePropertySymbol(
     override val intersections: Collection<FirCallableSymbol<*>>
 ) : FirPropertySymbol(callableId), FirIntersectionCallableSymbol
 
-class FirBackingFieldSymbol(callableId: CallableId) : FirVariableSymbol<FirProperty>(callableId)
+class FirBackingFieldSymbol(callableId: CallableId) : FirVariableSymbol<FirProperty>(callableId) {
+    val isVal: Boolean
+        get() = fir.isVal
 
-class FirDelegateFieldSymbol(callableId: CallableId) : FirVariableSymbol<FirProperty>(callableId) {
-    val delegate: FirExpression
-        get() = fir.delegate!!
+    val isVar: Boolean
+        get() = fir.isVar
+
+    val getterSymbol: FirPropertyAccessorSymbol?
+        get() = fir.getter?.symbol
 }
 
+class FirDelegateFieldSymbol(callableId: CallableId) : FirVariableSymbol<FirProperty>(callableId)
+
 class FirFieldSymbol(callableId: CallableId) : FirVariableSymbol<FirField>(callableId)
 
 class FirEnumEntrySymbol(callableId: CallableId) : FirVariableSymbol<FirEnumEntry>(callableId)
 
 class FirValueParameterSymbol(name: Name) : FirVariableSymbol<FirValueParameter>(CallableId(name)) {
-    val name: Name
-        get() = callableId.callableName
+    val hasDefaultValue: Boolean
+        get() = fir.defaultValue != null
+
+    val isCrossinline: Boolean
+        get() = fir.isCrossinline
+
+    val isNoinline: Boolean
+        get() = fir.isNoinline
+
+    val isVararg: Boolean
+        get() = fir.isVararg
+
 }
 
 class FirErrorPropertySymbol(