[FIR] Add NAME_IN_CONSTRAINT_IS_NOT_A_TYPE_PARAMETER check

compiler/fir/tree/src/org/jetbrains/kotlin/fir/declarations/danglingConstraints.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir.declarations
+
+import org.jetbrains.kotlin.fir.FirSourceElement
+import org.jetbrains.kotlin.name.Name
+
+/**
+ * Constraint without corresponding type argiment
+ */
+data class DanglingTypeConstraint(val name: Name, val source: FirSourceElement)
+
+private object DanglingTypeConstraintsKey : FirDeclarationDataKey()
+
+var <T> T.danglingTypeConstraints: List<DanglingTypeConstraint>?
+        where T : FirDeclaration, T : FirTypeParameterRefsOwner
+        by FirDeclarationDataRegistry.data(DanglingTypeConstraintsKey)
+
+fun FirDeclaration.getDanglingTypeConstraintsOrEmpty(): List<DanglingTypeConstraint> {
+    val res = when (this) {
+        is FirRegularClass -> danglingTypeConstraints
+        is FirSimpleFunction -> danglingTypeConstraints
+        is FirProperty -> danglingTypeConstraints
+        else -> null
+    }
+    return res ?: emptyList()
+}