[FIR] Partial implementation of DEPRECATION(_ERROR) diagnostics

No support for inheritance deprecations
and deprecations in qualifier's parts

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/classMembers.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: classMembers.kt
     public? final? [RAW_FIR] class A : R|kotlin/Any| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/propertyWithGetter.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: propertyWithGetter.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/propertyWithGetterAndSetter.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: propertyWithGetterAndSetter.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/propertyWithInitializer.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: propertyWithInitializer.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/secondaryConstructor.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: secondaryConstructor.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/superTypes.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: superTypes.kt
     public? open [RAW_FIR] class A : R|kotlin/Any| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/superTypesLoop.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: superTypesLoop.kt
     public? open [RAW_FIR] class resolveMe : C {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/topLevelFunctions.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: topLevelFunctions.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/topLevelFunctionsWithExpressionBodyAndExplicitType.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: topLevelFunctionsWithExpressionBodyAndExplicitType.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/lazyResolve/topLevelFunctionsWithImplicitType.txt

@@ -1,3 +1,4 @@
+
 RAW_FIR:
 FILE: topLevelFunctionsWithImplicitType.kt
     public? final? [RAW_FIR] fun resolveMe(): R|kotlin/Unit| {

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -278,6 +278,22 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirErrors.DEPRECATION_ERROR) { firDiagnostic ->
+        DeprecationErrorImpl(
+            firSymbolBuilder.buildSymbol(firDiagnostic.a.fir as FirDeclaration),
+            firDiagnostic.b,
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
+    add(FirErrors.DEPRECATION) { firDiagnostic ->
+        DeprecationImpl(
+            firSymbolBuilder.buildSymbol(firDiagnostic.a.fir as FirDeclaration),
+            firDiagnostic.b,
+            firDiagnostic as FirPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.CREATING_AN_INSTANCE_OF_ABSTRACT_CLASS) { firDiagnostic ->
         CreatingAnInstanceOfAbstractClassImpl(
             firDiagnostic as FirPsiDiagnostic,

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -217,6 +217,18 @@ sealed class KtFirDiagnostic<PSI: PsiElement> : KtDiagnosticWithPsi<PSI> {
         override val diagnosticClass get() = NoThis::class
     }
 
+    abstract class DeprecationError : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = DeprecationError::class
+        abstract val reference: KtSymbol
+        abstract val message: String
+    }
+
+    abstract class Deprecation : KtFirDiagnostic<PsiElement>() {
+        override val diagnosticClass get() = Deprecation::class
+        abstract val reference: KtSymbol
+        abstract val message: String
+    }
+
     abstract class CreatingAnInstanceOfAbstractClass : KtFirDiagnostic<KtExpression>() {
         override val diagnosticClass get() = CreatingAnInstanceOfAbstractClass::class
     }

idea/idea-frontend-fir/src/org/jetbrains/kotlin/idea/frontend/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -323,6 +323,24 @@ internal class NoThisImpl(
     override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
 }
 
+internal class DeprecationErrorImpl(
+    override val reference: KtSymbol,
+    override val message: String,
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.DeprecationError(), KtAbstractFirDiagnostic<PsiElement> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
+internal class DeprecationImpl(
+    override val reference: KtSymbol,
+    override val message: String,
+    firDiagnostic: FirPsiDiagnostic,
+    override val token: ValidityToken,
+) : KtFirDiagnostic.Deprecation(), KtAbstractFirDiagnostic<PsiElement> {
+    override val firDiagnostic: FirPsiDiagnostic by weakRef(firDiagnostic)
+}
+
 internal class CreatingAnInstanceOfAbstractClassImpl(
     firDiagnostic: FirPsiDiagnostic,
     override val token: ValidityToken,