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
60 lines
1.4 KiB
Kotlin
Vendored
60 lines
1.4 KiB
Kotlin
Vendored
/*
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* KOTLIN DIAGNOSTICS SPEC TEST (NEGATIVE)
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*
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* SPEC VERSION: 0.1-152
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* PRIMARY LINKS: expressions, when-expression -> paragraph 2 -> sentence 5
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* expressions, when-expression -> paragraph 5 -> sentence 1
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* expressions, when-expression -> paragraph 6 -> sentence 1
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* expressions, when-expression -> paragraph 6 -> sentence 3
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* expressions, when-expression -> paragraph 6 -> sentence 5
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* expressions, when-expression -> paragraph 6 -> sentence 9
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* expressions, when-expression -> paragraph 6 -> sentence 10
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* expressions, when-expression -> paragraph 6 -> sentence 11
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*/
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fun Int.foo() : Boolean = true
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fun foo() : Int {
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val s = ""
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val x = 1
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when (x) {
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is String -> 1
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<!USELESS_IS_CHECK!>!is Int<!> -> 1
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<!USELESS_IS_CHECK!>is Any?<!> -> 1
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<!USELESS_IS_CHECK!>is Any<!> -> 1
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<!INCOMPATIBLE_TYPES!>s<!> -> 1
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1 -> 1
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1 <!OVERLOAD_RESOLUTION_AMBIGUITY!>+<!> <!UNRESOLVED_REFERENCE!>a<!> -> 1
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in 1..<!UNRESOLVED_REFERENCE!>a<!> -> 1
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!in 1..<!UNRESOLVED_REFERENCE!>a<!> -> 1
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else -> 1
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}
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return 0
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}
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val _type_test : Int = foo() // this is needed to ensure the inferred return type of foo()
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fun test() {
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val x = 1;
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val s = "";
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when (x) {
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<!INCOMPATIBLE_TYPES!>s<!> -> 1
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<!INCOMPATIBLE_TYPES!>""<!> -> 1
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x -> 1
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1 -> 1
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}
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val z = 1
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when (z) {
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<!ELSE_MISPLACED_IN_WHEN!>else<!> -> 1
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1 -> 2
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}
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when (z) {
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else -> 1
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}
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}
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