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Add equality constraints without subtyping

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^KT-42195 Fixed
^KT-41741 Fixed
This commit is contained in:
Victor Petukhov
2020-10-16 14:27:08 +03:00
parent b1b87becc8
commit 84129098cb
20 changed files with 325 additions and 46 deletions
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idea/testData/checker/MultipleBounds.kt
Vendored
+14 -14
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@@ -18,46 +18,46 @@ class Test1<T>()
where
T : A,
T : B,
<error>B</error> : T // error
<error descr="[NAME_IN_CONSTRAINT_IS_NOT_A_TYPE_PARAMETER] B does not refer to a type parameter of Test1">B</error> : T // error
{
fun test(t : T) {
<error>T</error>.<error>foo</error>()
<error>T</error>.<error>bar</error>()
<error descr="[TYPE_PARAMETER_ON_LHS_OF_DOT] Type parameter 'T' cannot have or inherit a companion object, so it cannot be on the left hand side of dot">T</error>.<error descr="[UNRESOLVED_REFERENCE] Unresolved reference: foo">foo</error>()
<error descr="[TYPE_PARAMETER_ON_LHS_OF_DOT] Type parameter 'T' cannot have or inherit a companion object, so it cannot be on the left hand side of dot">T</error>.<error descr="[UNRESOLVED_REFERENCE] Unresolved reference: bar">bar</error>()
t.foo()
t.bar()
}
}
fun test() {
Test1<<error>B</error>>()
Test1<<error>A</error>>()
Test1<<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'A'">B</error>>()
Test1<<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'B'">A</error>>()
Test1<C>()
}
class Foo() {}
class Bar<T : <warning>Foo</warning>>
class Bar<T : <warning descr="[FINAL_UPPER_BOUND] 'Foo' is a final type, and thus a value of the type parameter is predetermined">Foo</warning>>
class Buzz<T> where T : <warning>Bar<<error>Int</error>></warning>, T : <error>nioho</error>
class Buzz<T> where T : <warning descr="[FINAL_UPPER_BOUND] 'Bar<Int>' is a final type, and thus a value of the type parameter is predetermined">Bar<<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'Foo'">Int</error>></warning>, T : <error descr="[UNRESOLVED_REFERENCE] Unresolved reference: nioho">nioho</error>
class X<T : <warning>Foo</warning>>
class Y<<error>T</error>> where T : <warning>Foo</warning>, T : <error>Bar<Foo></error>
class X<T : <warning descr="[FINAL_UPPER_BOUND] 'Foo' is a final type, and thus a value of the type parameter is predetermined">Foo</warning>>
class Y<<error descr="[CONFLICTING_UPPER_BOUNDS] Upper bounds of T have empty intersection">T</error>> where T : <warning descr="[FINAL_UPPER_BOUND] 'Foo' is a final type, and thus a value of the type parameter is predetermined">Foo</warning>, T : <error descr="[ONLY_ONE_CLASS_BOUND_ALLOWED] Only one of the upper bounds can be a class">Bar<Foo></error>
fun <T> test2(t : T)
where
T : A,
T : B,
<error>B</error> : T
<error descr="[NAME_IN_CONSTRAINT_IS_NOT_A_TYPE_PARAMETER] B does not refer to a type parameter of test2">B</error> : T
{
<error>T</error>.<error>foo</error>()
<error>T</error>.<error>bar</error>()
<error descr="[TYPE_PARAMETER_ON_LHS_OF_DOT] Type parameter 'T' cannot have or inherit a companion object, so it cannot be on the left hand side of dot">T</error>.<error descr="[UNRESOLVED_REFERENCE] Unresolved reference: foo">foo</error>()
<error descr="[TYPE_PARAMETER_ON_LHS_OF_DOT] Type parameter 'T' cannot have or inherit a companion object, so it cannot be on the left hand side of dot">T</error>.<error descr="[UNRESOLVED_REFERENCE] Unresolved reference: bar">bar</error>()
t.foo()
t.bar()
}
val t1 = test2<<error>A</error>>(A())
val t2 = test2<<error>B</error>>(C())
val t1 = test2<<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'B'">A</error>>(<error descr="[TYPE_MISMATCH] Type mismatch: inferred type is A but B was expected">A()</error>)
val t2 = test2<<error descr="[UPPER_BOUND_VIOLATED] Type argument is not within its bounds: should be subtype of 'A'">B</error>>(C())
val t3 = test2<C>(C())
val <T, B: T> Pair<T, B>.x : Int get() = 0