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 +1,45 @@
+// !DIAGNOSTICS: -UNUSED_EXPRESSION,-UNUSED_VARIABLE
+
+fun <T : CharSequence?> T.bar1() {}
+fun CharSequence?.bar2() {}
+
+fun <T : CharSequence> T.bar3() {}
+fun CharSequence.bar4() {}
+
+fun <T : CharSequence?> foo(x: T) {
+
+    if (x != null) {
+        if (<!SENSELESS_COMPARISON!>x != null<!>) {}
+
+        <!DEBUG_INFO_SMARTCAST!>x<!>.length()
+        x<!UNNECESSARY_SAFE_CALL!>?.<!>length()
+
+        x.bar1()
+        x.bar2()
+        x.<!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>bar3<!>()
+        <!DEBUG_INFO_SMARTCAST!>x<!>.bar4()
+
+
+        x<!UNNECESSARY_SAFE_CALL!>?.<!>bar1()
+    }
+
+    x<!UNSAFE_CALL!>.<!>length()
+
+    if (x is String) {
+        <!DEBUG_INFO_SMARTCAST!>x<!>.length()
+        <!DEBUG_INFO_SMARTCAST!>x<!><!UNNECESSARY_SAFE_CALL!>?.<!>length()
+
+        <!DEBUG_INFO_SMARTCAST!>x<!>.bar1()
+        x.bar2()
+        <!DEBUG_INFO_SMARTCAST!>x<!>.bar3()
+    }
+
+    if (x is CharSequence) {
+        <!DEBUG_INFO_SMARTCAST!>x<!>.length()
+        x<!UNNECESSARY_SAFE_CALL!>?.<!>length()
+
+        <!DEBUG_INFO_SMARTCAST!>x<!>.bar1()
+        x.bar2()
+        <!DEBUG_INFO_SMARTCAST!>x<!>.bar3()
+    }
+}