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/*
* Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.resolve
import org.jetbrains.kotlin.config.LanguageFeature
import org.jetbrains.kotlin.config.LanguageVersionSettings
import org.jetbrains.kotlin.descriptors.annotations.KotlinTarget
import org.jetbrains.kotlin.lexer.KtKeywordToken
import org.jetbrains.kotlin.lexer.KtTokens.*
import java.util.*
enum class Compatibility {
// modifier pair is compatible: ok (default)
COMPATIBLE,
// second is redundant to first: warning
REDUNDANT,
// first is redundant to second: warning
REVERSE_REDUNDANT,
// error
REPEATED,
// pair is deprecated, will become incompatible: warning
DEPRECATED,
// pair is incompatible: error
INCOMPATIBLE,
// same but only for functions / properties: error
COMPATIBLE_FOR_CLASSES_ONLY
}
val compatibilityTypeMap = hashMapOf, Compatibility>()
fun compatibility(first: KtKeywordToken, second: KtKeywordToken): Compatibility {
return if (first == second) {
Compatibility.REPEATED
} else {
mutualCompatibility[Pair(first, second)] ?: Compatibility.COMPATIBLE
}
}
// First modifier in pair should be also first in declaration
private val mutualCompatibility = buildCompatibilityMap()
private fun buildCompatibilityMap(): Map, Compatibility> {
val result = hashMapOf, Compatibility>()
// Variance: in + out are incompatible
result += incompatibilityRegister(IN_KEYWORD, OUT_KEYWORD)
// Visibilities: incompatible
result += incompatibilityRegister(PRIVATE_KEYWORD, PROTECTED_KEYWORD, PUBLIC_KEYWORD, INTERNAL_KEYWORD)
// Abstract + open + final + sealed: incompatible
result += incompatibilityRegister(ABSTRACT_KEYWORD, OPEN_KEYWORD, FINAL_KEYWORD, SEALED_KEYWORD)
// data + open, data + inner, data + abstract, data + sealed, data + inline, data + value
result += incompatibilityRegister(DATA_KEYWORD, OPEN_KEYWORD)
result += incompatibilityRegister(DATA_KEYWORD, INNER_KEYWORD)
result += incompatibilityRegister(DATA_KEYWORD, ABSTRACT_KEYWORD)
result += incompatibilityRegister(DATA_KEYWORD, SEALED_KEYWORD)
result += incompatibilityRegister(DATA_KEYWORD, INLINE_KEYWORD)
result += incompatibilityRegister(DATA_KEYWORD, VALUE_KEYWORD)
// open is redundant to abstract & override
result += redundantRegister(ABSTRACT_KEYWORD, OPEN_KEYWORD)
// abstract is redundant to sealed
result += redundantRegister(SEALED_KEYWORD, ABSTRACT_KEYWORD)
// const is incompatible with abstract, open, override
result += incompatibilityRegister(CONST_KEYWORD, ABSTRACT_KEYWORD)
result += incompatibilityRegister(CONST_KEYWORD, OPEN_KEYWORD)
result += incompatibilityRegister(CONST_KEYWORD, OVERRIDE_KEYWORD)
// private is incompatible with override
result += incompatibilityRegister(PRIVATE_KEYWORD, OVERRIDE_KEYWORD)
// private is compatible with open / abstract only for classes
result += compatibilityForClassesRegister(PRIVATE_KEYWORD, OPEN_KEYWORD)
result += compatibilityForClassesRegister(PRIVATE_KEYWORD, ABSTRACT_KEYWORD)
result += incompatibilityRegister(CROSSINLINE_KEYWORD, NOINLINE_KEYWORD)
// 1. subclasses contained inside a sealed class can not be instantiated, because their constructors needs
// an instance of an outer sealed (effectively abstract) class
// 2. subclasses of a non-top-level sealed class must be declared inside the class
// (see the KEEP https://github.com/Kotlin/KEEP/blob/master/proposals/sealed-class-inheritance.md)
result += incompatibilityRegister(SEALED_KEYWORD, INNER_KEYWORD)
// header / expect / impl / actual are all incompatible
result += incompatibilityRegister(HEADER_KEYWORD, EXPECT_KEYWORD, IMPL_KEYWORD, ACTUAL_KEYWORD)
return result
}
private fun incompatibilityRegister(vararg list: KtKeywordToken): Map, Compatibility> {
return compatibilityRegister(Compatibility.INCOMPATIBLE, *list)
}
private fun redundantRegister(
sufficient: KtKeywordToken,
redundant: KtKeywordToken
): Map, Compatibility> {
return mapOf(
Pair(sufficient, redundant) to Compatibility.REDUNDANT,
Pair(redundant, sufficient) to Compatibility.REVERSE_REDUNDANT
)
}
private fun compatibilityForClassesRegister(vararg list: KtKeywordToken) =
compatibilityRegister(Compatibility.COMPATIBLE_FOR_CLASSES_ONLY, *list)
private fun compatibilityRegister(
compatibility: Compatibility, vararg list: KtKeywordToken
): Map, Compatibility> {
val result = hashMapOf, Compatibility>()
for (first in list) {
for (second in list) {
if (first != second) {
result[Pair(first, second)] = compatibility
}
}
}
return result
}
val featureDependencies = mapOf(
SUSPEND_KEYWORD to listOf(LanguageFeature.Coroutines),
INLINE_KEYWORD to listOf(LanguageFeature.InlineProperties, LanguageFeature.InlineClasses),
HEADER_KEYWORD to listOf(LanguageFeature.MultiPlatformProjects),
IMPL_KEYWORD to listOf(LanguageFeature.MultiPlatformProjects),
EXPECT_KEYWORD to listOf(LanguageFeature.MultiPlatformProjects),
ACTUAL_KEYWORD to listOf(LanguageFeature.MultiPlatformProjects),
LATEINIT_KEYWORD to listOf(LanguageFeature.LateinitTopLevelProperties, LanguageFeature.LateinitLocalVariables),
FUN_KEYWORD to listOf(LanguageFeature.FunctionalInterfaceConversion),
DATA_KEYWORD to listOf(LanguageFeature.DataObjects)
)
val featureDependenciesTargets = mapOf(
LanguageFeature.InlineProperties to setOf(KotlinTarget.PROPERTY, KotlinTarget.PROPERTY_GETTER, KotlinTarget.PROPERTY_SETTER),
LanguageFeature.LateinitLocalVariables to setOf(KotlinTarget.LOCAL_VARIABLE),
LanguageFeature.LateinitTopLevelProperties to setOf(KotlinTarget.TOP_LEVEL_PROPERTY),
LanguageFeature.InlineClasses to setOf(KotlinTarget.CLASS_ONLY),
LanguageFeature.JvmInlineValueClasses to setOf(KotlinTarget.CLASS_ONLY),
LanguageFeature.FunctionalInterfaceConversion to setOf(KotlinTarget.INTERFACE),
LanguageFeature.DataObjects to setOf(KotlinTarget.STANDALONE_OBJECT)
)
val defaultVisibilityTargets: EnumSet = EnumSet.of(
KotlinTarget.CLASS_ONLY, KotlinTarget.OBJECT, KotlinTarget.INTERFACE, KotlinTarget.ENUM_CLASS, KotlinTarget.ANNOTATION_CLASS,
KotlinTarget.MEMBER_FUNCTION, KotlinTarget.TOP_LEVEL_FUNCTION, KotlinTarget.PROPERTY_GETTER, KotlinTarget.PROPERTY_SETTER,
KotlinTarget.MEMBER_PROPERTY, KotlinTarget.TOP_LEVEL_PROPERTY, KotlinTarget.CONSTRUCTOR, KotlinTarget.TYPEALIAS,
)
val possibleTargetMap = mapOf(
ENUM_KEYWORD to EnumSet.of(KotlinTarget.ENUM_CLASS),
ABSTRACT_KEYWORD to EnumSet.of(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.INTERFACE,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.MEMBER_FUNCTION
),
OPEN_KEYWORD to EnumSet.of(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.INTERFACE,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.MEMBER_FUNCTION
),
FINAL_KEYWORD to EnumSet.of(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.ENUM_CLASS,
KotlinTarget.OBJECT,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.MEMBER_FUNCTION
),
SEALED_KEYWORD to EnumSet.of(KotlinTarget.CLASS_ONLY, KotlinTarget.INTERFACE),
INNER_KEYWORD to EnumSet.of(KotlinTarget.CLASS_ONLY),
OVERRIDE_KEYWORD to EnumSet.of(KotlinTarget.MEMBER_PROPERTY, KotlinTarget.MEMBER_FUNCTION),
PRIVATE_KEYWORD to defaultVisibilityTargets + KotlinTarget.BACKING_FIELD,
PUBLIC_KEYWORD to defaultVisibilityTargets,
INTERNAL_KEYWORD to defaultVisibilityTargets + KotlinTarget.BACKING_FIELD,
PROTECTED_KEYWORD to EnumSet.of(
KotlinTarget.CLASS_ONLY,
KotlinTarget.OBJECT,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS,
KotlinTarget.MEMBER_FUNCTION,
KotlinTarget.PROPERTY_GETTER,
KotlinTarget.PROPERTY_SETTER,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.CONSTRUCTOR,
KotlinTarget.TYPEALIAS
),
IN_KEYWORD to EnumSet.of(KotlinTarget.TYPE_PARAMETER, KotlinTarget.TYPE_PROJECTION),
OUT_KEYWORD to EnumSet.of(KotlinTarget.TYPE_PARAMETER, KotlinTarget.TYPE_PROJECTION),
REIFIED_KEYWORD to EnumSet.of(KotlinTarget.TYPE_PARAMETER),
VARARG_KEYWORD to EnumSet.of(KotlinTarget.VALUE_PARAMETER, KotlinTarget.PROPERTY_PARAMETER),
COMPANION_KEYWORD to EnumSet.of(KotlinTarget.OBJECT),
LATEINIT_KEYWORD to EnumSet.of(
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.TOP_LEVEL_PROPERTY,
KotlinTarget.LOCAL_VARIABLE,
KotlinTarget.BACKING_FIELD
),
DATA_KEYWORD to EnumSet.of(KotlinTarget.CLASS_ONLY, KotlinTarget.LOCAL_CLASS, KotlinTarget.STANDALONE_OBJECT),
INLINE_KEYWORD to EnumSet.of(
KotlinTarget.FUNCTION,
KotlinTarget.PROPERTY,
KotlinTarget.PROPERTY_GETTER,
KotlinTarget.PROPERTY_SETTER,
KotlinTarget.CLASS_ONLY
),
NOINLINE_KEYWORD to EnumSet.of(KotlinTarget.VALUE_PARAMETER),
TAILREC_KEYWORD to EnumSet.of(KotlinTarget.FUNCTION),
SUSPEND_KEYWORD to EnumSet.of(KotlinTarget.MEMBER_FUNCTION, KotlinTarget.TOP_LEVEL_FUNCTION, KotlinTarget.LOCAL_FUNCTION),
EXTERNAL_KEYWORD to EnumSet.of(
KotlinTarget.FUNCTION,
KotlinTarget.PROPERTY,
KotlinTarget.PROPERTY_GETTER,
KotlinTarget.PROPERTY_SETTER,
KotlinTarget.CLASS
),
ANNOTATION_KEYWORD to EnumSet.of(KotlinTarget.ANNOTATION_CLASS),
CROSSINLINE_KEYWORD to EnumSet.of(KotlinTarget.VALUE_PARAMETER),
CONST_KEYWORD to EnumSet.of(KotlinTarget.MEMBER_PROPERTY, KotlinTarget.TOP_LEVEL_PROPERTY),
OPERATOR_KEYWORD to EnumSet.of(KotlinTarget.FUNCTION),
INFIX_KEYWORD to EnumSet.of(KotlinTarget.FUNCTION),
HEADER_KEYWORD to EnumSet.of(
KotlinTarget.TOP_LEVEL_FUNCTION,
KotlinTarget.TOP_LEVEL_PROPERTY,
KotlinTarget.CLASS_ONLY,
KotlinTarget.OBJECT,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS
),
IMPL_KEYWORD to EnumSet.of(
KotlinTarget.TOP_LEVEL_FUNCTION,
KotlinTarget.MEMBER_FUNCTION,
KotlinTarget.TOP_LEVEL_PROPERTY,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.CONSTRUCTOR,
KotlinTarget.CLASS_ONLY,
KotlinTarget.OBJECT,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS,
KotlinTarget.TYPEALIAS
),
EXPECT_KEYWORD to EnumSet.of(
KotlinTarget.TOP_LEVEL_FUNCTION,
KotlinTarget.TOP_LEVEL_PROPERTY,
KotlinTarget.CLASS_ONLY,
KotlinTarget.OBJECT,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS
),
ACTUAL_KEYWORD to EnumSet.of(
KotlinTarget.TOP_LEVEL_FUNCTION,
KotlinTarget.MEMBER_FUNCTION,
KotlinTarget.TOP_LEVEL_PROPERTY,
KotlinTarget.MEMBER_PROPERTY,
KotlinTarget.CONSTRUCTOR,
KotlinTarget.CLASS_ONLY,
KotlinTarget.OBJECT,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS,
KotlinTarget.TYPEALIAS
),
FUN_KEYWORD to EnumSet.of(KotlinTarget.INTERFACE),
VALUE_KEYWORD to EnumSet.of(KotlinTarget.CLASS_ONLY)
)
// NOTE: deprecated targets must be possible!
val deprecatedTargetMap = mapOf>()
val deprecatedParentTargetMap = mapOf>()
val deprecatedModifierMap = mapOf(
HEADER_KEYWORD to EXPECT_KEYWORD,
IMPL_KEYWORD to ACTUAL_KEYWORD
)
// NOTE: redundant targets must be possible!
val redundantTargetMap = mapOf>(
OPEN_KEYWORD to EnumSet.of(KotlinTarget.INTERFACE)
)
interface TargetAllowedPredicate {
fun isAllowed(target: KotlinTarget, languageVersionSettings: LanguageVersionSettings): Boolean
}
fun always(target: KotlinTarget, vararg targets: KotlinTarget) = object : TargetAllowedPredicate {
private val targetSet = EnumSet.of(target, *targets)
override fun isAllowed(target: KotlinTarget, languageVersionSettings: LanguageVersionSettings) =
target in targetSet
}
fun ifSupported(languageFeature: LanguageFeature, target: KotlinTarget, vararg targets: KotlinTarget) =
object : TargetAllowedPredicate {
private val targetSet = EnumSet.of(target, *targets)
override fun isAllowed(target: KotlinTarget, languageVersionSettings: LanguageVersionSettings) =
languageVersionSettings.supportsFeature(languageFeature) && target in targetSet
}
fun or(p1: TargetAllowedPredicate, p2: TargetAllowedPredicate) = object : TargetAllowedPredicate {
override fun isAllowed(target: KotlinTarget, languageVersionSettings: LanguageVersionSettings) =
p1.isAllowed(target, languageVersionSettings) ||
p2.isAllowed(target, languageVersionSettings)
}
val possibleParentTargetPredicateMap = mapOf(
INNER_KEYWORD to or(
always(KotlinTarget.CLASS_ONLY, KotlinTarget.LOCAL_CLASS, KotlinTarget.ENUM_CLASS),
ifSupported(LanguageFeature.InnerClassInEnumEntryClass, KotlinTarget.ENUM_ENTRY)
),
OVERRIDE_KEYWORD to always(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.OBJECT,
KotlinTarget.OBJECT_LITERAL,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ENUM_ENTRY
),
PROTECTED_KEYWORD to always(KotlinTarget.CLASS_ONLY, KotlinTarget.LOCAL_CLASS, KotlinTarget.ENUM_CLASS, KotlinTarget.COMPANION_OBJECT),
INTERNAL_KEYWORD to always(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.OBJECT,
KotlinTarget.OBJECT_LITERAL,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ENUM_ENTRY,
KotlinTarget.FILE
),
PRIVATE_KEYWORD to always(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.OBJECT,
KotlinTarget.OBJECT_LITERAL,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ENUM_ENTRY,
KotlinTarget.FILE
),
COMPANION_KEYWORD to always(
KotlinTarget.CLASS_ONLY,
KotlinTarget.INTERFACE,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ANNOTATION_CLASS
),
FINAL_KEYWORD to always(
KotlinTarget.CLASS_ONLY,
KotlinTarget.LOCAL_CLASS,
KotlinTarget.OBJECT,
KotlinTarget.OBJECT_LITERAL,
KotlinTarget.ENUM_CLASS,
KotlinTarget.ENUM_ENTRY,
KotlinTarget.ANNOTATION_CLASS,
KotlinTarget.FILE
),
VARARG_KEYWORD to always(KotlinTarget.CONSTRUCTOR, KotlinTarget.FUNCTION, KotlinTarget.CLASS)
)
