kotlin.reflect.jvm.internal.impl.resolve.constants.CompileTimeConstant.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package kotlin.reflect.jvm.internal.impl.resolve.constants

import kotlin.reflect.jvm.internal.impl.builtins.KotlinBuiltIns
import kotlin.reflect.jvm.internal.impl.descriptors.annotations.Annotations
import kotlin.reflect.jvm.internal.impl.types.*

interface CompileTimeConstant {
    val isError: Boolean
        get() = false

    val parameters: CompileTimeConstant.Parameters

    fun toConstantValue(expectedType: KotlinType): ConstantValue

    fun getValue(expectedType: KotlinType): T = toConstantValue(expectedType).value

    val canBeUsedInAnnotations: Boolean get() = parameters.canBeUsedInAnnotation

    val usesVariableAsConstant: Boolean get() = parameters.usesVariableAsConstant

    val usesNonConstValAsConstant: Boolean get() = parameters.usesNonConstValAsConstant

    val isPure: Boolean get() = parameters.isPure

    class Parameters(
            val canBeUsedInAnnotation: Boolean,
            val isPure: Boolean,
            val usesVariableAsConstant: Boolean,
            val usesNonConstValAsConstant: Boolean
    )
}

class TypedCompileTimeConstant(
        val constantValue: ConstantValue,
        override val parameters: CompileTimeConstant.Parameters
) : CompileTimeConstant {
    override val isError: Boolean
        get() = constantValue is ErrorValue

    val type: KotlinType = constantValue.type

    override fun toConstantValue(expectedType: KotlinType): ConstantValue = constantValue

    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (other !is TypedCompileTimeConstant<*>) return false
        if (isError) return other.isError
        if (other.isError) return false
        return constantValue.value == other.constantValue.value && type == other.type
    }

    override fun hashCode(): Int {
        if (isError) return 13
        var result = constantValue.value?.hashCode() ?: 0
        result = 31 * result + type.hashCode()
        return result
    }
}

class IntegerValueTypeConstant(
        private val value: Number,
        private val builtIns: KotlinBuiltIns,
        override val parameters: CompileTimeConstant.Parameters
) : CompileTimeConstant {
    private val typeConstructor = IntegerValueTypeConstructor(value.toLong(), builtIns)

    override fun toConstantValue(expectedType: KotlinType): ConstantValue {
        val factory = ConstantValueFactory(builtIns)
        val type = getType(expectedType)
        return when {
            KotlinBuiltIns.isInt(type) -> {
                factory.createIntValue(value.toInt())
            }
            KotlinBuiltIns.isByte(type) -> {
                factory.createByteValue(value.toByte())
            }
            KotlinBuiltIns.isShort(type) -> {
                factory.createShortValue(value.toShort())
            }
            else -> {
                factory.createLongValue(value.toLong())
            }
        }
    }

    val unknownIntegerType = KotlinTypeFactory.simpleTypeWithNonTrivialMemberScope(Annotations.EMPTY, typeConstructor, emptyList(),
                                                                                   false, ErrorUtils.createErrorScope("Scope for number value type (" + typeConstructor.toString() + ")", true)
    )

    fun getType(expectedType: KotlinType): KotlinType = TypeUtils.getPrimitiveNumberType(typeConstructor, expectedType)

    override fun toString() = typeConstructor.toString()

    override fun equals(other: Any?) = other is IntegerValueTypeConstant && value == other.value

    override fun hashCode() = value.hashCode()
}