Fix MixinClassCastInspectionSuppressor for pattern match instanceof and architectury projects

Author: Earthcomputer

src/main/kotlin/platform/mixin/inspection/suppress/MixinClassCastInspectionSuppressor.kt

@@ -39,6 +39,7 @@ import com.intellij.psi.PsiExpression
 import com.intellij.psi.PsiInstanceOfExpression
 import com.intellij.psi.PsiType
 import com.intellij.psi.PsiTypeCastExpression
+import com.intellij.psi.PsiTypeTestPattern
 import com.intellij.psi.util.PsiUtil
 
 /**
@@ -54,7 +55,9 @@ class MixinClassCastInspectionSuppressor : InspectionSuppressor {
 
         // check instanceof
         if (element is PsiInstanceOfExpression) {
-            val castType = element.checkType?.type ?: return false
+            val castType = element.checkType?.type
+                ?: (element.pattern as? PsiTypeTestPattern)?.checkType?.type
+                ?: return false
             var operand = PsiUtil.skipParenthesizedExprDown(element.operand) ?: return false
             while (operand is PsiTypeCastExpression) {
                 operand = PsiUtil.skipParenthesizedExprDown(operand.operand) ?: return false

src/main/kotlin/platform/mixin/util/Mixin.kt

@@ -201,7 +201,7 @@ fun isAssignable(left: PsiType, right: PsiType): Boolean {
 private fun isClassAssignable(leftClass: PsiClass, rightClass: PsiClass): Boolean {
     var result = false
     InheritanceUtil.processSupers(rightClass, true) {
-        if (it == leftClass) {
+        if (it.qualifiedName == leftClass.qualifiedName) {
             result = true
             false
         } else {