Nikolay Lunyak
f0720c1d12
The compiler should only report diagnostics for
comparisons over builtins and identity-less types,
other incompatibilities should be reported
via inspections.
It's ok that in `equalityChecksOnIntegerTypes`
instead of `EQUALITY_NOT_APPLICABLE_WARNING` we get
`EQUALITY_NOT_APPLICABLE`, because
`ProperEqualityChecksInBuilderInferenceCalls`
is already active by default.
This change also replaces the notion of a representative superclass
with the least upper bound.
This makes complex types like
intersection/flexible transparent to
RULES1-based compatibility checks.
One way to look at it is to think
that this is an automatic way of handling
type parameters: automatic picking of
"interesting" bounds, and checking them against one another.
Note that `TypeIntersector.intersectTypes`
for `Int` and `T` where `T` is a type parameter
may return both `{Int & T}` or `null`
depending on `T`-s bounds. At the same time,
for type parameters `T` and `K` it will
always return `{T & K}`.
`ConeTypeIntersector.intersectTypes`, on the
other hand, will always return `{Int & T}`
irrespectively of the bounds. Meaning, the two
intersectors differ in corner cases.
`lowerBoundIfFlexible` call in `isLiterallyTypeParameter` is backed by
the `equalityOfFlexibleTypeParameters` test.
^KT-35134 #fixed-in-k2
^KT-22499 #fixed-in-k2
^KT-46383 #fixed-in-k2
64 lines
2.2 KiB
Kotlin
Vendored
64 lines
2.2 KiB
Kotlin
Vendored
interface Buffered {
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fun flush()
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}
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interface AIPowered {
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fun getAvatarReleaseYear(): Int
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}
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enum class BufferedEnum : Buffered {
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A, B;
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override fun flush() {}
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}
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enum class UsualEnum {
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C, D;
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}
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enum class CleverEnum : Buffered, AIPowered {
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E, F;
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override fun flush() {}
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override fun getAvatarReleaseYear() = 2022
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}
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fun <P> processInfo1(info: String, printer: P) where P: Buffered, P: AIPowered {
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<!EQUALITY_NOT_APPLICABLE!>printer == 20<!>
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printer == BufferedEnum.A
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == UsualEnum.C<!>
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printer == CleverEnum.E
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}
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fun <P> processInfo2(info: String, printer: P) where P: AIPowered, P: Buffered {
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<!EQUALITY_NOT_APPLICABLE!>printer == 20<!>
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == BufferedEnum.A<!>
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == UsualEnum.C<!>
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printer == CleverEnum.E
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}
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abstract class Printer {
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abstract fun print(command: String)
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}
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fun <P> processInfo3(info: String, printer: P) where P: Buffered, P: Printer {
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<!EQUALITY_NOT_APPLICABLE!>printer == 20<!>
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == BufferedEnum.A<!>
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == UsualEnum.C<!>
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<!INCOMPATIBLE_ENUM_COMPARISON_ERROR!>printer == CleverEnum.E<!>
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}
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fun test(a: Int, b: Any?) {
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<!IMPLICIT_BOXING_IN_IDENTITY_EQUALS!>a === b<!>
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}
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fun <<!INCONSISTENT_TYPE_PARAMETER_BOUNDS, MISPLACED_TYPE_PARAMETER_CONSTRAINTS!><!CONFLICTING_UPPER_BOUNDS!>T<!>: <!FINAL_UPPER_BOUND!>Int<!><!>> rest(a: T, b: Any?) where T : <!FINAL_UPPER_BOUND, ONLY_ONE_CLASS_BOUND_ALLOWED!>String<!> {
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a === b
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}
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fun <<!MISPLACED_TYPE_PARAMETER_CONSTRAINTS!>T: Any?<!>> nest(a: Int, b: T) where T : <!FINAL_UPPER_BOUND, ONLY_ONE_CLASS_BOUND_ALLOWED!>String<!> {
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<!EQUALITY_NOT_APPLICABLE!>a === b<!>
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}
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fun <<!INCONSISTENT_TYPE_PARAMETER_BOUNDS, MISPLACED_TYPE_PARAMETER_CONSTRAINTS!><!CONFLICTING_UPPER_BOUNDS!>T<!>: <!FINAL_UPPER_BOUND!>Int<!><!>, <!MISPLACED_TYPE_PARAMETER_CONSTRAINTS!>K: Any?<!>> mest(a: T, b: K) where T : <!FINAL_UPPER_BOUND, ONLY_ONE_CLASS_BOUND_ALLOWED!>String<!>, K: <!FINAL_UPPER_BOUND, ONLY_ONE_CLASS_BOUND_ALLOWED!>Boolean<!> {
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a === b
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}
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