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FIR: Support exhaustive whens on subjects of intersection type

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This commit is contained in:
Denis.Zharkov
2021-06-08 17:59:01 +03:00
parent c8b9a3a6f0
commit 2653565f56
11 changed files with 262 additions and 11 deletions
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compiler/testData/diagnostics/tests/when/intersectionExhaustivenessComplex.fir.kt
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// !CHECK_TYPE
sealed class A {
class A1 : A()
class A2 : A()
}
sealed class B {
class B1 : B()
class B2 : B()
}
fun foo(a: A) {
if (a !is B) return
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
}.length
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
}.length // OK
when (a) {
is A.A1 -> ""
is A.A2 -> "v"
is B.B1 -> "..." // should be warning: unreachable code
}.length // OK
when (a) {
is A.A1 -> ""
is B.B1 -> "..."
is A.A2 -> "v"
}.length // OK
<!NO_ELSE_IN_WHEN!>when<!> (a) {
is A.A1 -> ""
is B.B1 -> "..."
}.<!UNRESOLVED_REFERENCE!>length<!>
}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessComplex.kt
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+42
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// !CHECK_TYPE
sealed class A {
class A1 : A()
class A2 : A()
}
sealed class B {
class B1 : B()
class B2 : B()
}
fun foo(a: A) {
if (a !is B) return
<!NO_ELSE_IN_WHEN!>when<!> (<!DEBUG_INFO_SMARTCAST!>a<!>) {
is A.A1 -> ""
is A.A2 -> "v"
}.length
<!NO_ELSE_IN_WHEN!>when<!> (<!DEBUG_INFO_SMARTCAST!>a<!>) {
is A.A1 -> ""
is A.A2 -> "v"
}.length // OK
<!NO_ELSE_IN_WHEN!>when<!> (<!DEBUG_INFO_SMARTCAST!>a<!>) {
is A.A1 -> ""
is A.A2 -> "v"
is <!INCOMPATIBLE_TYPES!>B.B1<!> -> "..." // should be warning: unreachable code
}.length // OK
<!NO_ELSE_IN_WHEN!>when<!> (<!DEBUG_INFO_SMARTCAST!>a<!>) {
is A.A1 -> ""
is <!INCOMPATIBLE_TYPES!>B.B1<!> -> "..."
is A.A2 -> "v"
}.length // OK
<!NO_ELSE_IN_WHEN!>when<!> (<!DEBUG_INFO_SMARTCAST!>a<!>) {
is A.A1 -> ""
is <!INCOMPATIBLE_TYPES!>B.B1<!> -> "..."
}.length
}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessComplex.txt
Vendored
+45
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package
public fun foo(/*0*/ a: A): kotlin.Unit
public sealed class A {
protected constructor A()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
public final class A1 : A {
public constructor A1()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
public final class A2 : A {
public constructor A2()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
}
public sealed class B {
protected constructor B()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
public final class B1 : B {
public constructor B1()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
public final class B2 : B {
public constructor B2()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessSimple.kt
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+21
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// SKIP_TXT
// FIR_IDENTICAL
// !CHECK_TYPE
sealed class KtClassifierSymbol
interface KtNamedSymbol
abstract class KtTypeParameterSymbol : KtClassifierSymbol() {}
sealed class KtClassLikeSymbol : KtClassifierSymbol() {}
fun foo(symbol: KtClassifierSymbol) {
if (symbol !is KtNamedSymbol) return
val x = when (symbol) {
is KtClassLikeSymbol -> "1"
is KtTypeParameterSymbol -> "2"
}
x checkType { _<String>() }
}
compiler/testData/diagnostics/tests/when/intersectionExhaustivenessSimple.txt
Vendored
+30
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package
public fun foo(/*0*/ symbol: KtClassifierSymbol): kotlin.Unit
public sealed class KtClassLikeSymbol : KtClassifierSymbol {
protected constructor KtClassLikeSymbol()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
public sealed class KtClassifierSymbol {
protected constructor KtClassifierSymbol()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
public interface KtNamedSymbol {
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}
public abstract class KtTypeParameterSymbol : KtClassifierSymbol {
public constructor KtTypeParameterSymbol()
public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
}