Zalim Bashorov
67 lines
3.0 KiB
Kotlin
67 lines
3.0 KiB
Kotlin
/*
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* Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
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*/
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package kotlin
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import kotlin.wasm.internal.*
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import kotlin.random.*
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/**
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* The root of the Kotlin class hierarchy. Every Kotlin class has [Any] as a superclass.
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*/
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public open class Any @WasmPrimitiveConstructor constructor() {
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// Pointer to runtime type info
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// Initialized by a compiler
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@Suppress("MUST_BE_INITIALIZED_OR_BE_ABSTRACT")
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internal var typeInfo: Int
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/**
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* Indicates whether some other object is "equal to" this one. Implementations must fulfil the following
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* requirements:
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*
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* * Reflexive: for any non-null value `x`, `x.equals(x)` should return true.
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* * Symmetric: for any non-null values `x` and `y`, `x.equals(y)` should return true if and only if `y.equals(x)` returns true.
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* * Transitive: for any non-null values `x`, `y`, and `z`, if `x.equals(y)` returns true and `y.equals(z)` returns true, then `x.equals(z)` should return true.
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* * Consistent: for any non-null values `x` and `y`, multiple invocations of `x.equals(y)` consistently return true or consistently return false, provided no information used in `equals` comparisons on the objects is modified.
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* * Never equal to null: for any non-null value `x`, `x.equals(null)` should return false.
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*
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* Read more about [equality](https://kotlinlang.org/docs/reference/equality.html) in Kotlin.
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*/
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public open operator fun equals(other: Any?): Boolean =
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wasm_ref_eq(this, other)
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/**
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* Returns a hash code value for the object. The general contract of `hashCode` is:
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*
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* * Whenever it is invoked on the same object more than once, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified.
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* * If two objects are equal according to the `equals()` method, then calling the `hashCode` method on each of the two objects must produce the same integer result.
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*/
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internal var _hashCode: Int = 0
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public open fun hashCode(): Int {
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return identityHashCode()
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}
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/**
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* Returns a string representation of the object.
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*/
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public open fun toString(): String {
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val typeInfoPtr = this.typeInfo
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val packageName = getPackageName(typeInfoPtr)
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val simpleName = getSimpleName(typeInfoPtr)
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val qualifiedName = if (packageName.isEmpty()) simpleName else "$packageName.$simpleName"
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return "$qualifiedName@${identityHashCode()}"
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}
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}
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// Don't use outside, otherwise it could break classes reusing `_hashCode` field, like String.
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// Don't inline it into usages, specifically to `hashCode`.
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// It was extracted to remove `toString`'s dependency on `hashCode`, which improves output size when DCE is involved.
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private fun Any.identityHashCode(): Int {
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if (_hashCode == 0)
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_hashCode = Random.nextInt(1, Int.MAX_VALUE)
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return _hashCode
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}
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