[NI] Consider intersection type with number type as Nothing

Currently, only for "in": In<in Int & A> == In<in Nothing> == In<*> #KT-37302 Fixed
2020-03-22 23:25:12 +03:00
parent b23aff4d0d
commit 191fb02bf6
26 changed files with 242 additions and 92 deletions
@@ -0,0 +1,81 @@
+// IGNORE_BACKEND: JS, JS_IR
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_RUNTIME
+
+// FILE: J.java
+
+public class J {
+    public static long platformLong() {
+        return 42;
+    }
+
+    public static Comparable<Long> platformCLong() {
+        return new Long(42);
+    }
+}
+
+// FILE: test.kt
+
+inline fun <reified T> check(value: Any?) {
+    if (value !is T) throw Exception("value: $value should have type ${T::class.simpleName}")
+}
+
+fun <K> selectFirst(vararg xs: K): K = xs[0]
+
+fun takeNLong(nL: Long?) {}
+
+fun <T> checkArray(array: T, copy: T.() -> T, toList: T.() -> List<*>, check: (T, T) -> Boolean, modify: T.() -> Unit) {}
+
+fun testFromStdlib() {
+    checkArray(arrayOf("a", 1, null), { copyOf() }, { toList() }, { a1, a2 -> a1 contentEquals a2 }, { reverse() })
+}
+
+fun box(): String {
+    check<Long>(selectFirst(0, 0L))
+    check<Byte>(selectFirst(0, 0.toByte()))
+    check<Short>(selectFirst(0, 0.toShort()))
+
+    takeNLong(0)
+
+    val cLong: Comparable<Long> = 0L
+    check<Long>(selectFirst(0, cLong))
+
+    val cByte: Comparable<Byte> = 0.toByte()
+    check<Byte>(selectFirst(0, cByte))
+
+    val cShort: Comparable<Short> = 0.toShort()
+    check<Short>(selectFirst(0, cShort))
+
+    val cStar: Comparable<*> = 0L
+    check<Int>(selectFirst(0, cStar))
+
+    check<Long>(selectFirst(0, J.platformLong()))
+    check<Long>(selectFirst(0, J.platformCLong()))
+
+    check<Int>(selectFirst(0, 0L, "string"))
+    check<Int>(selectFirst(0, 0L, true))
+    check<Int>(selectFirst(0, 0L, 0.toByte()))
+    check<Int>(selectFirst(0, 0L, 0f))
+    check<Int>(selectFirst(0, 0L, 0f, 0.0))
+
+    val r = 0
+    check<Int>(
+        when (r) {
+            0 -> 0
+            1 -> 0L
+            2 -> "string"
+            else -> TODO()
+        }
+    )
+
+    check<Int>(selectFirst(0, 0L, 0.0, null))
+
+    check<ULong>(selectFirst(0u, 0uL))
+    check<UByte>(selectFirst(0u, 0.toUByte()))
+    check<UShort>(selectFirst(0u, 0.toUShort()))
+
+    check<UInt>(selectFirst(0u, 0uL, "foo"))
+    check<UInt>(selectFirst(0u, 0uL, "foo", null))
+
+    return "OK"
+}