Support for 'as' and temporary support for 'is'

idea/idea-analysis/src/org/jetbrains/kotlin/idea/search/usagesSearch/destructuringDeclarationUsages.kt

@@ -198,6 +198,15 @@ private class Processor(
                                     return true
                                 }
                             }
+
+                            is KtIsExpression -> {
+                                return true //TODO!
+                            }
+
+                            is KtBinaryExpressionWithTypeRHS -> {
+                                processSuspiciousExpression(typeRefParent)
+                                return true
+                            }
                         }
                     }
 

idea/testData/findUsages/kotlin/conventions/components/dataClass.2.kt

@@ -20,3 +20,14 @@ fun g() = A()
 fun h() = g()
 
 fun listOfA() = listOf<A>(A(1, "", ""))
+
+fun x(o: Any) {
+    if (o is A) {
+        val (x, y) = o
+    }
+}
+
+fun y(o: Any) {
+    val list = o as List<A>
+    val (x, y) = list[0]
+}

idea/testData/findUsages/kotlin/conventions/components/dataClass.results.txt

@@ -5,6 +5,8 @@
 [dataClass.2.kt] Value read 11 val (x3, y3, z3) = h()
 [dataClass.2.kt] Value read 13 val (x4, y4, z4) = listOfA()[0]
 [dataClass.2.kt] Value read 15 val (x5, y5, z5) = javaClass.getA()[0]
+[dataClass.2.kt] Value read 26 val (x, y) = o
+[dataClass.2.kt] Value read 32 val (x, y) = list[0]
 [dataClass.2.kt] Value read 5 a.n
 [dataClass.2.kt] Value read 8 val (x, y, z) = a
 [dataClass.2.kt] Value read 9 val (x1, y1, z1) = f()