[FIR] Add ReturnsImplies effect analyzer

2020-08-11 12:41:43 +03:00
parent 3454ae7ca4
commit 21b8679799
37 changed files with 1110 additions and 89 deletions
@@ -0,0 +1,35 @@
+import kotlin.contracts.*
+
+@OptIn(ExperimentalContracts::class)
+fun foo(x: String?): Any? {
+    <!WRONG_IMPLIES_CONDITION!>contract {
+        returns(null) implies (x != null)
+    }<!>
+
+    if (true) {
+        throw java.lang.IllegalArgumentException()
+    }
+
+    return x
+}
+
+@OptIn(ExperimentalContracts::class)
+fun bar(x: String?): Any? {
+    <!WRONG_IMPLIES_CONDITION!>contract {
+        returns() implies (x != null)
+    }<!>
+
+    if (x == null) {
+        return x
+    }
+    return x
+}
+
+@OptIn(ExperimentalContracts::class)
+fun baz(x: String?): Any? {
+    <!WRONG_IMPLIES_CONDITION!>contract {
+        returns(null) implies (x != null)
+    }<!>
+
+    return x
+}
@@ -0,0 +1,40 @@
+FILE: notNull.kt
+    @R|kotlin/OptIn|(vararg(<getClass>(Q|kotlin/contracts/ExperimentalContracts|))) public final fun foo(x: R|kotlin/String?|): R|kotlin/Any?|
+        [R|Contract description]
+         <
+            Returns(NULL) -> x != null
+        >
+     {
+        [StubStatement]
+        when () {
+            Boolean(true) ->  {
+                throw Q|java/lang|.R|java/lang/IllegalArgumentException.IllegalArgumentException|()
+            }
+        }
+
+        ^foo R|<local>/x|
+    }
+    @R|kotlin/OptIn|(vararg(<getClass>(Q|kotlin/contracts/ExperimentalContracts|))) public final fun bar(x: R|kotlin/String?|): R|kotlin/Any?|
+        [R|Contract description]
+         <
+            Returns(WILDCARD) -> x != null
+        >
+     {
+        [StubStatement]
+        when () {
+            ==(R|<local>/x|, Null(null)) ->  {
+                ^bar R|<local>/x|
+            }
+        }
+
+        ^bar R|<local>/x|
+    }
+    @R|kotlin/OptIn|(vararg(<getClass>(Q|kotlin/contracts/ExperimentalContracts|))) public final fun baz(x: R|kotlin/String?|): R|kotlin/Any?|
+        [R|Contract description]
+         <
+            Returns(NULL) -> x != null
+        >
+     {
+        [StubStatement]
+        ^baz R|<local>/x|
+    }
@@ -0,0 +1,18 @@
+import kotlin.contracts.*
+
+@OptIn(ExperimentalContracts::class)
+fun Any?.isNotNull(): Boolean {
+    contract {
+        returns(true) implies (this@isNotNull != null)
+    }
+    return this != null
+}
+
+@OptIn(ExperimentalContracts::class)
+val Any?.isNotNull: Boolean
+    get() {
+        <!WRONG_IMPLIES_CONDITION!>contract {
+            returns(true) implies (this@isNotNull != null)
+        }<!>
+        return this@isNotNull != null
+    }
@@ -0,0 +1,20 @@
+FILE: propertyGetter.kt
+    @R|kotlin/OptIn|(vararg(<getClass>(Q|kotlin/contracts/ExperimentalContracts|))) public final fun R|kotlin/Any?|.isNotNull(): R|kotlin/Boolean|
+        [R|Contract description]
+         <
+            Returns(TRUE) -> this != null
+        >
+     {
+        [StubStatement]
+        ^isNotNull !=(this@R|/isNotNull|, Null(null))
+    }
+    @R|kotlin/OptIn|(vararg(<getClass>(Q|kotlin/contracts/ExperimentalContracts|))) public final val R|kotlin/Any?|.isNotNull: R|kotlin/Boolean|
+        public get(): R|kotlin/Boolean|
+            [R|Contract description]
+             <
+                Returns(TRUE) -> this != null
+            >
+         {
+            [StubStatement]
+            ^ !=(this@R|/isNotNull|, Null(null))
+        }