Prohibit expressions of Result type as left operands of ?./!!/?:

#KT-26659 In Progress

compiler/testData/diagnostics/testsWithStdLib/coroutines/usageOfResultTypeWithNullableOperators.kt

@@ -0,0 +1,38 @@
+// !DIAGNOSTICS: -UNUSED_EXPRESSION
+
+fun <T> id(x: T): T = x
+
+private val asFun: () -> Result<Int>? = TODO()
+private val Int.intResult: Result<Int>?
+    get() = null
+
+fun returnInt(): Int? = 0
+
+
+fun nullableOperators(r1: Result<Int>?, b: Boolean) {
+    if (b) {
+        r1<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>!!<!>
+        asFun()<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>!!<!>
+        returnInt()?.intResult<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>!!<!>.toString()
+    }
+
+    if (b) {
+        id(r1)<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>!!<!>
+    }
+
+    if (b) {
+        r1<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?.<!>toString()
+        returnInt()?.intResult<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?.<!>toString()
+        asFun()<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?.<!>toString()
+        id(r1)<!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?.<!>toString()
+    }
+
+    if (b) {
+        r1 <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> 0
+        r1 <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> r1
+        asFun() <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> r1 <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> 0
+        id(asFun()) <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> 0
+
+        returnInt() ?: returnInt() ?: asFun() <!RESULT_CLASS_WITH_NULLABLE_OPERATOR!>?:<!> 0
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/coroutines/usageOfResultTypeWithNullableOperators.txt

@@ -0,0 +1,7 @@
+package
+
+private val asFun: () -> kotlin.Result<kotlin.Int>?
+private val kotlin.Int.intResult: kotlin.Result<kotlin.Int>?
+public fun </*0*/ T> id(/*0*/ x: T): T
+public fun nullableOperators(/*0*/ r1: kotlin.Result<kotlin.Int>?, /*1*/ b: kotlin.Boolean): kotlin.Unit
+public fun returnInt(): kotlin.Int?