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[FIR] Check is for impossibility

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^KT-58203 Fixed
^KT-62646
This commit is contained in:
Nikolay Lunyak
2024-02-29 15:39:33 +02:00
committed by Space Team
parent 92d8da621e
commit 88ff93df7f
42 changed files with 110 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files
compiler/testData/diagnostics/nativeTests/forwardDeclarations.fir.kt
Vendored
+2 -2
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@@ -68,8 +68,8 @@ fun testIs(x: Any) : Int {
}
}
fun testIs2(x: lib.FwdStruct) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is cnames.structs.FwdStruct<!>
fun testIs3(x: lib.FwdObjcClass) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.classes.FwdObjcClass<!>
fun testIs2(x: lib.FwdStruct) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION, USELESS_IS_CHECK!>x is cnames.structs.FwdStruct<!>
fun testIs3(x: lib.FwdObjcClass) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION, USELESS_IS_CHECK!>x is objcnames.classes.FwdObjcClass<!>
fun testIs4(x: lib.FwdProtocol) = <!CANNOT_CHECK_FOR_FORWARD_DECLARATION!>x is objcnames.protocols.FwdProtocol<!>
compiler/testData/diagnostics/tests/IsExpressions.fir.kt
Vendored
+1 -1
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@@ -2,7 +2,7 @@
fun test() {
if (<!USELESS_IS_CHECK!>1 is Int<!>) {
if (1 is Boolean) {
if (<!USELESS_IS_CHECK!>1 is Boolean<!>) {
}
}
compiler/testData/diagnostics/tests/PackageInExpressionPosition.fir.kt
Vendored
+1 -1
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@@ -19,7 +19,7 @@ fun main() {
<!NO_COMPANION_OBJECT!>System<!>!!
java.lang.<!NO_COMPANION_OBJECT, VARIABLE_EXPECTED!>System<!> = <!NULL_FOR_NONNULL_TYPE!>null<!>
java.lang.<!NO_COMPANION_OBJECT!>System<!>!!
<!NO_COMPANION_OBJECT!>System<!> is Int
<!USELESS_IS_CHECK!><!NO_COMPANION_OBJECT!>System<!> is Int<!>
<!INVISIBLE_REFERENCE!>System<!>()
(<!NO_COMPANION_OBJECT!>System<!>)
foo@ <!NO_COMPANION_OBJECT!>System<!>
compiler/testData/diagnostics/tests/cast/isErasedUnrelatedAndStarred.fir.kt
Vendored
+4
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@@ -0,0 +1,4 @@
class G<T>
interface Tr
fun f(q: Tr) = <!USELESS_IS_CHECK!>q is G<*><!>
compiler/testData/diagnostics/tests/cast/isErasedUnrelatedAndStarred.kt
Vendored
-1
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@@ -1,4 +1,3 @@
// FIR_IDENTICAL
class G<T>
interface Tr
compiler/testData/diagnostics/tests/controlStructures/kt657.fir.kt
Vendored
+1 -1
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@@ -11,7 +11,7 @@ fun foo() =
<!CONDITION_TYPE_MISMATCH, TYPE_MISMATCH!>Pair(1, 2)<!> -> 3
<!ARGUMENT_TYPE_MISMATCH, EXPECTED_CONDITION!>in 1..10<!> -> 34
<!CONDITION_TYPE_MISMATCH!>4<!> -> 38
<!EXPECTED_CONDITION!>is Int<!> -> 33
<!EXPECTED_CONDITION, USELESS_IS_CHECK!>is Int<!> -> 33
else -> 34
}
compiler/testData/diagnostics/tests/dataFlowInfoTraversal/smartcasts/SmartcastAmbiguitites.fir.kt
Vendored
+1 -1
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@@ -9,7 +9,7 @@ class C() {
fun test(a : Any?) {
if (a is B) {
if (a is C) {
if (<!USELESS_IS_CHECK!>a is C<!>) {
a.bar();
}
}
compiler/testData/diagnostics/tests/enum/enumSubjectTypeCheck.fir.kt
Vendored
+1 -1
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@@ -30,7 +30,7 @@ fun useEn(x: En) = x
fun useEn2(x: En2) = x
fun bar(x: Any) {
if (x is En && x is En2) {
if (x is En && <!USELESS_IS_CHECK!>x is En2<!>) {
when (x) {
En.A -> useEn(x)
En2.D -> useEn2(x)
compiler/testData/diagnostics/tests/generics/kt53656.fir.kt
Vendored
+1 -1
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@@ -5,7 +5,7 @@ interface Entity<T>
abstract class SecuredEntity<out E>(val entity: E) where E : Entity<Int>, E : SecurityCodeAware<*,*>
interface SecurityCodeAware<out E, R : SecuredEntity<E>> where E : Entity<Int>, E : SecurityCodeAware<E, R>
fun <E, R : SecuredEntity<E>> SecurityCodeAware<E, R>.secured() : R where E : Entity<Int>, E : SecurityCodeAware<E, R> = <!RETURN_TYPE_MISMATCH!>when(this) {
is Order -> SecuredOrder(this)
<!USELESS_IS_CHECK!>is Order<!> -> SecuredOrder(this)
else -> null!!
}<!>
class Order : Entity<Int>
compiler/testData/diagnostics/tests/inference/coercionToUnit/coercionToUnitWithNothingType.fir.kt
Vendored
+1 -1
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@@ -45,7 +45,7 @@ fun test(i: Inv<Nothing>, iUnit: Inv<Unit>) {
run<dynamic> { "" }
}
if (iUnit is String) {
if (<!USELESS_IS_CHECK!>iUnit is String<!>) {
launch {
run(A.<!INFERRED_TYPE_VARIABLE_INTO_EMPTY_INTERSECTION_WARNING!>flexible<!>(iUnit)) { 42 }
}
compiler/testData/diagnostics/tests/infos/SmartCasts.fir.kt
Vendored
+2 -2
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@@ -111,12 +111,12 @@ fun f13(a : A?) {
<!UNRESOLVED_REFERENCE!>c<!>.bar()
}
if (!(a is B) || !(a is C)) {
if (!(a is B) || !(<!USELESS_IS_CHECK!>a is C<!>)) {
}
else {
}
if (!(a is B) || !(a is C)) {
if (!(a is B) || !(<!USELESS_IS_CHECK!>a is C<!>)) {
}
if (!(a is B)) return
compiler/testData/diagnostics/tests/scopes/stopResolutionOnAmbiguity.fir.kt
Vendored
+1 -1
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@@ -11,7 +11,7 @@ class C() {
fun test(a : Any?) {
if (a is B) {
if (a is C) {
if (<!USELESS_IS_CHECK!>a is C<!>) {
a.bar();
}
}
compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.fir.kt
Vendored
+17
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@@ -0,0 +1,17 @@
sealed class Sealed(val x: Int) {
object First: Sealed(12)
open class NonFirst(x: Int, val y: Int): Sealed(x) {
object Second: NonFirst(34, 2)
object Third: NonFirst(56, 3)
}
object Last: Sealed(78)
}
fun foo(s: Sealed): Int {
return when(s) {
!is Sealed.First -> 1
<!USELESS_IS_CHECK!>!is Sealed.Last<!> -> 0
// no else required
}
}
compiler/testData/diagnostics/tests/sealed/ExhaustiveWhenNegatedTwice.kt
Vendored
-1
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@@ -1,4 +1,3 @@
// FIR_IDENTICAL
sealed class Sealed(val x: Int) {
object First: Sealed(12)
open class NonFirst(x: Int, val y: Int): Sealed(x) {
compiler/testData/diagnostics/tests/smartCasts/kt27221_irrelevantClasses.fir.kt
Vendored
+2 -2
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@@ -11,7 +11,7 @@ fun foo(a: A) {
if (a is B) {
if (a is C) {
val t = when (a) {
is CC -> "CC"
<!USELESS_IS_CHECK!>is CC<!> -> "CC"
}
}
}
@@ -21,7 +21,7 @@ fun foo2(a: A) {
if (a is C) {
if (a is B) {
val t = when (a) {
is CC -> "CC"
<!USELESS_IS_CHECK!>is CC<!> -> "CC"
}
}
}
compiler/testData/diagnostics/tests/smartCasts/variables/aliasing.fir.kt
Vendored
+3 -3
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@@ -25,7 +25,7 @@ fun test() {
b.<!UNRESOLVED_REFERENCE!>length<!> // error
c.length // OK, since `c` is aliased to `a`
}
if (b is String) {
if (<!USELESS_IS_CHECK!>b is String<!>) {
a.<!UNRESOLVED_REFERENCE!>length<!> // error
c.<!UNRESOLVED_REFERENCE!>length<!> // error
}
@@ -35,11 +35,11 @@ fun test() {
}
a = 2 // break `c` -> `a`
if (a is String) {
if (<!USELESS_IS_CHECK!>a is String<!>) {
b.<!UNRESOLVED_REFERENCE!>length<!> // error
c.<!UNRESOLVED_REFERENCE!>length<!> // error
}
if (b is String) {
if (<!USELESS_IS_CHECK!>b is String<!>) {
a.<!UNRESOLVED_REFERENCE!>length<!> // error
c.<!UNRESOLVED_REFERENCE!>length<!> // error
}
compiler/testData/diagnostics/tests/visibility/kt63434.fir.kt
Vendored
+1 -1
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@@ -11,7 +11,7 @@ fun checkCannotAccess() {
object : InlineCompletionSessionManager() {
fun chch() {
val b: Proto = Proto()
if (b is Proto.Some) return
if (<!USELESS_IS_CHECK!>b is Proto.Some<!>) return
}
}
}
compiler/testData/diagnostics/tests/when/When.fir.kt
Vendored
+1 -1
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@@ -18,7 +18,7 @@ fun foo() : Int {
val s = ""
val x = 1
when (x) {
is String -> 1
<!USELESS_IS_CHECK!>is String<!> -> 1
<!USELESS_IS_CHECK!>!is Int<!> -> 1
<!USELESS_IS_CHECK!>is Any?<!> -> 1
<!USELESS_IS_CHECK!>is Any<!> -> 1
compiler/testData/diagnostics/tests/when/deprecatedSyntaxInConditionsNoSubject.fir.kt
Vendored
+2 -2
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@@ -39,8 +39,8 @@ fun testWithSubject_ok(x: Boolean, y: Boolean?, any: Any, z: Boolean) {
y ?: x -> {}
x in x -> {}
x !in x -> {}
x is String -> {}
x !is String -> {}
<!USELESS_IS_CHECK!>x is String<!> -> {}
<!USELESS_IS_CHECK!>x !is String<!> -> {}
x < x -> {}
x > x -> {}
x <= x -> {}
compiler/testData/diagnostics/tests/when/deprecatedSyntaxInConditions_after.fir.kt
Vendored
+8 -8
View File
@@ -57,8 +57,8 @@ fun testWithSubject_bad_1(x: A) {
when (x) {
<!CONFUSING_BRANCH_CONDITION_ERROR!>x in x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x !in x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x !is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR, USELESS_IS_CHECK!>x is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR, USELESS_IS_CHECK!>x !is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x < x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x > x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_ERROR!>x <= x<!> -> {}
@@ -72,8 +72,8 @@ fun testWithSubject_bad_1(x: A) {
when (x) {
(x in x) -> {}
(x !in x) -> {}
(x is String) -> {}
(x !is String) -> {}
(<!USELESS_IS_CHECK!>x is String<!>) -> {}
(<!USELESS_IS_CHECK!>x !is String<!>) -> {}
(x < x) -> {}
(x > x) -> {}
(x <= x) -> {}
@@ -161,8 +161,8 @@ fun testWithRange_bad_1(x: A) {
when (x) {
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x in x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x !in x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x !is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR, USELESS_IS_CHECK!>x is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR, USELESS_IS_CHECK!>x !is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x < x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x > x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_ERROR!>x <= x<!> -> {}
@@ -176,8 +176,8 @@ fun testWithRange_bad_1(x: A) {
when (x) {
in (x in x) -> {}
in (x !in x) -> {}
in (x is String) -> {}
in (x !is String) -> {}
in (<!USELESS_IS_CHECK!>x is String<!>) -> {}
in (<!USELESS_IS_CHECK!>x !is String<!>) -> {}
in (x < x) -> {}
in (x > x) -> {}
in (x <= x) -> {}
compiler/testData/diagnostics/tests/when/deprecatedSyntaxInConditions_before.fir.kt
Vendored
+8 -8
View File
@@ -57,8 +57,8 @@ fun testWithSubject_bad_1(x: A) {
when (x) {
<!CONFUSING_BRANCH_CONDITION_WARNING!>x in x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x !in x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x !is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING, USELESS_IS_CHECK!>x is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING, USELESS_IS_CHECK!>x !is String<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x < x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x > x<!> -> {}
<!CONFUSING_BRANCH_CONDITION_WARNING!>x <= x<!> -> {}
@@ -72,8 +72,8 @@ fun testWithSubject_bad_1(x: A) {
when (x) {
(x in x) -> {}
(x !in x) -> {}
(x is String) -> {}
(x !is String) -> {}
(<!USELESS_IS_CHECK!>x is String<!>) -> {}
(<!USELESS_IS_CHECK!>x !is String<!>) -> {}
(x < x) -> {}
(x > x) -> {}
(x <= x) -> {}
@@ -161,8 +161,8 @@ fun testWithRange_bad_1(x: A) {
when (x) {
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x in x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x !in x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x !is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING, USELESS_IS_CHECK!>x is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING, USELESS_IS_CHECK!>x !is String<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x < x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x > x<!> -> {}
in <!CONFUSING_BRANCH_CONDITION_WARNING!>x <= x<!> -> {}
@@ -176,8 +176,8 @@ fun testWithRange_bad_1(x: A) {
when (x) {
in (x in x) -> {}
in (x !in x) -> {}
in (x is String) -> {}
in (x !is String) -> {}
in (<!USELESS_IS_CHECK!>x is String<!>) -> {}
in (<!USELESS_IS_CHECK!>x !is String<!>) -> {}
in (x < x) -> {}
in (x > x) -> {}
in (x <= x) -> {}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessComplex.fir.kt
Vendored
+12 -12
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@@ -14,29 +14,29 @@ fun foo(a: A) {
if (a !is B) return
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
<!USELESS_IS_CHECK!>is A.A1<!> -> ""
<!USELESS_IS_CHECK!>is A.A2<!> -> "v"
}.length
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
<!USELESS_IS_CHECK!>is A.A1<!> -> ""
<!USELESS_IS_CHECK!>is A.A2<!> -> "v"
}.length // OK
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
is B.B1 -> "..." // should be warning: unreachable code
<!USELESS_IS_CHECK!>is A.A1<!> -> ""
<!USELESS_IS_CHECK!>is A.A2<!> -> "v"
<!USELESS_IS_CHECK!>is B.B1<!> -> "..." // should be warning: unreachable code
}.length // OK
when (a) {
is A.A1 -> ""
is B.B1 -> "..."
is A.A2 -> "v"
<!USELESS_IS_CHECK!>is A.A1<!> -> ""
<!USELESS_IS_CHECK!>is B.B1<!> -> "..."
<!USELESS_IS_CHECK!>is A.A2<!> -> "v"
}.length // OK
<!NO_ELSE_IN_WHEN!>when<!> (a) {
is A.A1 -> ""
is B.B1 -> "..."
<!USELESS_IS_CHECK!>is A.A1<!> -> ""
<!USELESS_IS_CHECK!>is B.B1<!> -> "..."
}.length
}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessSimple.kt
Vendored
+1 -1
View File
@@ -1,5 +1,5 @@
// SKIP_TXT
// FIR_IDENTICAL
// SKIP_TXT
// !CHECK_TYPE
sealed class KtClassifierSymbol
compiler/testData/diagnostics/tests/when/withSubjectVariable/unsupportedVariableDeclarationsInWhenSubject.fir.kt
Vendored
+1 -1
View File
@@ -12,7 +12,7 @@ fun testSimpleValInWhenSubject() {
fun testValWithoutInitializerWhenSubject() {
when (<!ILLEGAL_DECLARATION_IN_WHEN_SUBJECT!>val y: Any<!>) {
<!EXPECTED_CONDITION!>is String<!> -> <!UNINITIALIZED_VARIABLE!>y<!>.<!UNRESOLVED_REFERENCE!>length<!>
<!EXPECTED_CONDITION, USELESS_IS_CHECK!>is String<!> -> <!UNINITIALIZED_VARIABLE!>y<!>.<!UNRESOLVED_REFERENCE!>length<!>
}
}
compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/deeplyNested.fir.kt
Vendored
+2 -2
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@@ -79,7 +79,7 @@ fun branchedAndNested(x: Any?, y: Any?) {
fun br(y: Any?) {
if (myAssert(y is Int) == Unit && myAssert(y is String) == Unit) {
if (myAssert(y is Int) == Unit && myAssert(<!USELESS_IS_CHECK!>y is String<!>) == Unit) {
y.length
y.inc()
}
@@ -90,7 +90,7 @@ fun branchedAndNestedWithNativeOperators(x: Any?, y: Any?) {
equalsTrue(notEqualsNull(nullWhenNotString(x))) // x is String
&&
(
(myAssert(y is Int) == Unit && myAssert(y is String) == Unit) // y is Int, String
(myAssert(y is Int) == Unit && myAssert(<!USELESS_IS_CHECK!>y is String<!>) == Unit) // y is Int, String
||
equalsTrue(isInt(y) && isString(y)) // y is Int, String
)
compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/intersectingInfo.fir.kt
Vendored
+2 -2
View File
@@ -45,8 +45,8 @@ fun intersectingInfo2(x: Any?, y: Any?) {
// of them is absent in each arg of "||"-operator, so they *shouldn't* lead to smartcast
if ((isString(x) && !notIsInt(x) && y is String) ||
(!notIsString(x) && isString(y) && y is Int) ||
(x is String && !notIsInt(y) && x is Int)) {
(!notIsString(x) && isString(y) && <!USELESS_IS_CHECK!>y is Int<!>) ||
(x is String && !notIsInt(y) && <!USELESS_IS_CHECK!>x is Int<!>)) {
x.length
x.<!UNRESOLVED_REFERENCE!>inc<!>()
y.<!UNRESOLVED_REFERENCE!>length<!>