Svyatoslav Kuzmich
73 lines
2.3 KiB
Kotlin
73 lines
2.3 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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/**
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* The `String` class represents character strings. All string literals in Kotlin programs, such as `"abc"`, are
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* implemented as instances of this class.
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*/
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@WasmPrimitive
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public class String constructor(public val string: String) : Comparable<String>, CharSequence {
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public companion object;
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/**
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* Returns a string obtained by concatenating this string with the string representation of the given [other] object.
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*/
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public operator fun plus(other: Any?): String =
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stringPlusImpl(this, other.toString())
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public override val length: Int
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get() = stringLengthImpl(this)
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/**
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* Returns the character of this string at the specified [index].
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*
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* If the [index] is out of bounds of this string, throws an [IndexOutOfBoundsException] except in Kotlin/JS
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* where the behavior is unspecified.
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*/
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public override fun get(index: Int): Char =
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stringGetCharImpl(this, index)
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public override fun subSequence(startIndex: Int, endIndex: Int): CharSequence =
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stringSubSequenceImpl(this, startIndex, endIndex)
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public override fun compareTo(other: String): Int =
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stringCompareToImpl(this, other)
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public override fun equals(other: Any?): Boolean {
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if (other is String)
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return this.compareTo(other) == 0
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return false
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}
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public override fun toString(): String = this
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// TODO: Implement
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public override fun hashCode(): Int = 10
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}
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@JsFun("(it, other) => it + String(other)")
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private fun stringPlusImpl(it: String, other: String): String =
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implementedAsIntrinsic
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@JsFun("(it) => it.length")
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private fun stringLengthImpl(it: String): Int =
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implementedAsIntrinsic
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@WasmImport("runtime", "String_getChar")
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private fun stringGetCharImpl(it: String, index: Int): Char =
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implementedAsIntrinsic
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@WasmImport("runtime", "String_compareTo")
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private fun stringCompareToImpl(it: String, other: String): Int =
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implementedAsIntrinsic
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@WasmImport("runtime", "String_subsequence")
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private fun stringSubSequenceImpl(string: String, startIndex: Int, endIndex: Int): String =
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implementedAsIntrinsic
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