Properly check whether nullability of receiver argument fits to parameter's nullability

It's should behave like we check isSubtype(receiverType, parameterType) + use nullability info from smart cast #KT-1090 Fixed
2015-08-26 11:29:18 +03:00
parent 70d4a7997e
commit aad977d204
13 changed files with 267 additions and 10 deletions
@@ -0,0 +1,35 @@
+// !DIAGNOSTICS: -UNUSED_EXPRESSION,-UNUSED_VARIABLE
+
+fun <T : CharSequence?> T.bar1() {}
+fun CharSequence?.bar2() {}
+
+fun <T : CharSequence> T.bar3() {}
+fun CharSequence.bar4() {}
+
+fun <T : String?> T.foo() {
+    if (this != null) {
+        if (<!SENSELESS_COMPARISON!>this != null<!>) {}
+
+        length()
+        this<!UNNECESSARY_SAFE_CALL!>?.<!>length()
+
+        bar1()
+        bar2()
+        <!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>bar3<!>()
+        bar4()
+
+
+        this<!UNNECESSARY_SAFE_CALL!>?.<!>bar1()
+    }
+
+    <!UNSAFE_CALL!>length<!>()
+
+    if (this is String) {
+        length()
+        this<!UNNECESSARY_SAFE_CALL!>?.<!>length()
+
+        bar1()
+        bar2()
+        <!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>bar3<!>()
+    }
+}