Support new form of definitely non-nullable types: T & Any

^KT-26245 In Progress
2021-08-09 12:10:51 +03:00
parent cdd8d1c163
commit 302eacbf59
53 changed files with 2139 additions and 196 deletions
@@ -0,0 +1,33 @@
+// !LANGUAGE: +DefinitelyNotNullTypeParameters
+
+fun <T> toDefNotNull(s: T): T & Any = s!!
+
+fun <K> removeQuestionMark(x: K?): K = x!!
+
+fun Any.foo() {}
+
+fun <E> expectNN(e: E & Any) {}
+
+fun <F> main(x: F, y: F, z: F, w: F, m: F) {
+    val y1 = toDefNotNull(x) // K instead of K & Any
+    val y2: F & Any = toDefNotNull(x) // K instead of K & Any
+    val x1 = removeQuestionMark(x) // T or T & Any
+    val x2: F & Any = removeQuestionMark(x) // T or T & Any
+
+    val z1 = x!!
+    val z2: F & Any = y!!
+    val w1 = if (z != null) <!DEBUG_INFO_SMARTCAST!>z<!> else return
+    val w2: F & Any = if (w != null) <!DEBUG_INFO_SMARTCAST!>w<!> else return
+
+    y1.foo()
+    y2.foo()
+    x1.foo()
+    x2.foo()
+    z1.foo()
+    z2.foo()
+    w1.foo()
+    w2.foo()
+
+    expectNN(<!TYPE_MISMATCH!>m<!>)
+    expectNN(m!!)
+}