KT-16264 Forbid usage of _ without backticks

Forbid underscore-only (_, __, ___, ...) names as callees and as types. If CHECK_TYPE directive is on, filter out UNDERSCORE_USAGE_WITHOUT_BACKTICKS messages.
2017-03-28 17:15:23 +03:00
parent 0a3c031528
commit caae6ff2ec
22 changed files with 317 additions and 19 deletions
@@ -0,0 +1,42 @@
+// !DIAGNOSTICS: -DEPRECATION -TOPLEVEL_TYPEALIASES_ONLY
+
+fun test(`_`: Int) {
+    <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>_<!> + 1
+    `_` + 1
+}
+
+fun `__`() {}
+
+fun testCall() {
+    <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!>()
+    `__`()
+}
+
+val testCallableRef = ::<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!>
+val testCallableRef2 = ::`__`
+
+
+object Host {
+    val `_` = 42
+    object `__` {
+        val bar = 4
+    }
+}
+
+val testQualified = Host.<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>_<!>
+val testQualified2 = Host.`_`
+
+object `___` {
+    val test = 42
+}
+
+val testQualifier = <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>___<!>.test
+val testQualifier2 = `___`.test
+val testQualifier3 = Host.<!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>__<!>.bar
+val testQualifier4 = Host.`__`.bar
+
+fun testCallableRefLHSValue(`_`: Any) = <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>_<!>::toString
+fun testCallableRefLHSValue2(`_`: Any) = `_`::toString
+
+val testCallableRefLHSObject = <!UNDERSCORE_USAGE_WITHOUT_BACKTICKS!>___<!>::toString
+val testCallableRefLHSObject2 = `___`::toString