[JS IR BE] Covert Char into inline class

libraries/stdlib/js/irRuntime/arrays.kt

@@ -32,7 +32,7 @@ internal fun booleanArray(size: Int): BooleanArray = withType("BooleanArray", fi
 
 internal fun booleanArrayOf(arr: Array<Boolean>): BooleanArray = withType("BooleanArray", arr.asDynamic().slice()).unsafeCast<BooleanArray>()
 
-internal fun charArray(size: Int): CharArray = withType("CharArray", fillArrayVal(Array<Char>(size), '\u0000')).unsafeCast<CharArray>()
+internal fun charArray(size: Int): CharArray = withType("CharArray", fillArrayVal(Array<Int>(size), 0)).unsafeCast<CharArray>()
 
 internal fun charArrayOf(arr: Array<Char>): CharArray = withType("CharArray", arr.asDynamic().slice()).unsafeCast<CharArray>()
 

libraries/stdlib/js/irRuntime/builtins/Char.kt

@@ -9,10 +9,9 @@ package kotlin
  * Represents a 16-bit Unicode character.
  * On the JVM, non-nullable values of this type are represented as values of the primitive type `char`.
  */
-public class Char(value: Int) : Comparable<Char> {
-
-    private val value = value and 0xFFFF
-
+@Suppress("NON_PUBLIC_PRIMARY_CONSTRUCTOR_OF_INLINE_CLASS")
+public inline class Char internal constructor (val value: Int) : Comparable<Char> {
+    
     /**
      * Compares this value with the specified value for order.
      * Returns zero if this value is equal to the specified other value, a negative number if it's less than other,
@@ -21,17 +20,17 @@ public class Char(value: Int) : Comparable<Char> {
     public override fun compareTo(other: Char): Int = value - other.value
 
     /** Adds the other Int value to this value resulting a Char. */
-    public operator fun plus(other: Int): Char = Char(value + other)
+    public operator fun plus(other: Int): Char = (value + other).toChar()
 
     /** Subtracts the other Char value from this value resulting an Int. */
     public operator fun minus(other: Char): Int = value - other.value
     /** Subtracts the other Int value from this value resulting a Char. */
-    public operator fun minus(other: Int): Char = Char(value - other)
+    public operator fun minus(other: Int): Char = (value - other).toChar()
 
     /** Increments this value. */
-    public operator fun inc(): Char = Char(value + 1)
+    public operator fun inc(): Char = (value + 1).toChar()
     /** Decrements this value. */
-    public operator fun dec(): Char = Char(value - 1)
+    public operator fun dec(): Char = (value - 1).toChar()
 
     /** Creates a range from this value to the specified [other] value. */
     public operator fun rangeTo(other: Char): CharRange = CharRange(this, other)
@@ -51,10 +50,6 @@ public class Char(value: Int) : Comparable<Char> {
     /** Returns the value of this character as a `Double`. */
     public fun toDouble(): Double = value.toDouble()
 
-    override fun equals(other: Any?): Boolean = other is Char && value == other.value
-
-    override fun hashCode(): Int = value
-
     override fun toString(): String {
         val value = value
         return js("String.fromCharCode(value)").unsafeCast<String>()

libraries/stdlib/js/irRuntime/numberConversion.kt

@@ -27,4 +27,4 @@ fun doubleToInt(a: dynamic) = js("""
     return a | 0;
 """).unsafeCast<Int>()
 
-fun numberToChar(a: dynamic) = Char(numberToInt(a))
+fun numberToChar(a: dynamic) = Char(numberToInt(a) and 0xFFFF)