Still WIP

js/entity/NumberEntity.js

@@ -0,0 +1,36 @@
+import P from "parsernostrum"
+import IEntity from "./IEntity.js"
+
+export default class NumberEntity extends IEntity {
+
+    static grammar = P.regArray(
+        new RegExp(`(${P.number.getParser().parser.regexp.source})|(\\+?inf)|(-inf)`)
+    ).map(([_0, n, plusInf, minusInf]) => new this(
+        n ? Number(n) : plusInf ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY
+    ))
+
+    /** @type {Number} */
+    #value
+    get value() {
+        return this.#value
+    }
+    set value(value) {
+        if (value === -0) {
+            value = 0
+        }
+        this.#value = value
+    }
+
+    constructor(value = 0) {
+        super()
+        this.value = value
+    }
+
+    valueOf() {
+        return this.value
+    }
+
+    toString() {
+        return this.value.toString()
+    }
+}