Report unmet trait requirements

#KT-3006 Fixed

compiler/testData/diagnostics/tests/traitWithRequired/abstractClass.kt

@@ -0,0 +1,7 @@
+open class Required
+
+trait Trait : Required
+
+abstract class <!UNMET_TRAIT_REQUIREMENT!>Abstract<!> : Trait
+
+abstract class <!UNMET_TRAIT_REQUIREMENT!>AbstractDerived<!> : Abstract()

compiler/testData/diagnostics/tests/traitWithRequired/anonymousObjectExtendsTraitWithRequired.kt

@@ -0,0 +1,6 @@
+open class Required
+
+trait A : Required
+
+val a = <!UNMET_TRAIT_REQUIREMENT!>object<!> : A {}
+val b: A = object : A, Required() {}

compiler/testData/diagnostics/tests/traitWithRequired/differentGenericArguments.kt

@@ -0,0 +1,8 @@
+open class Generic<T>
+
+trait A : Generic<Int>
+
+trait B : Generic<String>
+
+class <!UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT!>Y<!> : <!INCONSISTENT_TYPE_PARAMETER_VALUES!>A, B<!>
+class Z : <!INCONSISTENT_TYPE_PARAMETER_VALUES!>A, B, Generic<Int>()<!>

compiler/testData/diagnostics/tests/traitWithRequired/kt3006.kt

@@ -0,0 +1,13 @@
+open class Base {
+}
+
+trait Derived: Base {
+    fun foo() {
+        f1(this@Derived)
+    }
+}
+
+class <!UNMET_TRAIT_REQUIREMENT!>DerivedImpl()<!>: Derived {}
+object <!UNMET_TRAIT_REQUIREMENT!>ObjectImpl<!>: Derived {}
+
+fun f1(b: Base) = b

compiler/testData/diagnostics/tests/traitWithRequired/manyRequirementsDisallowed.kt

@@ -0,0 +1,4 @@
+open class A
+open class B
+
+trait C : A, <!MANY_CLASSES_IN_SUPERTYPE_LIST!>B<!>

compiler/testData/diagnostics/tests/traitWithRequired/manyTraitsRequireSameClass.kt

@@ -0,0 +1,14 @@
+open class Required
+
+trait A : Required
+
+trait B : A, Required
+
+trait C : Required
+
+trait D : B, Required
+
+class <!UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT!>W<!> : D
+class X : D, Required()
+class <!UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT, UNMET_TRAIT_REQUIREMENT!>Y<!> : C, D
+class Z : D, C, Required()

compiler/testData/diagnostics/tests/traitWithRequired/requirementFulfilledBySubclass.kt

@@ -0,0 +1,8 @@
+open class RequiredBase
+
+trait Trait : RequiredBase
+
+open class RequiredDerived : RequiredBase()
+
+class <!UNMET_TRAIT_REQUIREMENT!>A<!> : Trait
+class B : Trait, RequiredDerived()

compiler/testData/diagnostics/tests/traitWithRequired/traitExtendsTraitWithRequired.kt

@@ -0,0 +1,8 @@
+open class Required(val value: String)
+
+trait First : Required
+
+trait Second : First
+
+class <!UNMET_TRAIT_REQUIREMENT!>Y<!> : Second
+class Z : Second, Required(":o)")

compiler/testData/diagnostics/tests/traitWithRequired/traitRequiresAny.kt

@@ -0,0 +1,5 @@
+trait AnyTrait : Any
+
+class Foo : AnyTrait
+
+class Bar : AnyTrait, Any()

compiler/testData/diagnostics/tests/traitWithRequired/uninheritableTraitDifferentGenericArguments.kt

@@ -0,0 +1,7 @@
+open class Generic<T>
+
+trait A : Generic<String>
+
+trait B : Generic<Int>
+
+trait C : <!INCONSISTENT_TYPE_PARAMETER_VALUES!>A, B<!>