Create a new Numberable helper

Building on laravel#48845, this class will work similarly to the `Stringable` class, but for numbers.

src/Illuminate/Support/Numberable.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace Illuminate\Support;
+
+use Illuminate\Support\Traits\Conditionable;
+use Illuminate\Support\Traits\Macroable;
+use Illuminate\Support\Traits\Tappable;
+
+class Numberable
+{
+    use Conditionable, Macroable, Tappable;
+
+    /**
+     * The underlying numeric value.
+     *
+     * @var int|float
+     */
+    protected $value;
+
+    /**
+     * Create a new instance of the class.
+     *
+     * @param  int|float  $value
+     * @return void
+     */
+    public function __construct($value = 0)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * Get the raw numeric value.
+     *
+     * @return int|float
+     */
+    public function value()
+    {
+        return $this->value;
+    }
+
+    /**
+     * Proxy dynamic properties onto methods.
+     *
+     * @param  string  $key
+     * @return mixed
+     */
+    public function __get($key)
+    {
+        return $this->{$key}();
+    }
+
+    /**
+     * Get the raw string value.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return (string) $this->value;
+    }
+}

tests/Support/SupportNumberableTest.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Illuminate\Tests\Support;
+
+use Illuminate\Support\Numberable;
+use PHPUnit\Framework\TestCase;
+
+class SupportNumberableTest extends TestCase
+{
+    /**
+     * @param  int|float  $number
+     * @return \Illuminate\Support\Numberable
+     */
+    protected function numberable($number = 0)
+    {
+        return new Numberable($number);
+    }
+
+    public function testNumberable()
+    {
+        $this->assertSame(0, $this->numberable()->value());
+        $this->assertSame(1, $this->numberable(1)->value());
+        $this->assertSame(1.1, $this->numberable(1.1)->value());
+    }
+
+    public function testMagicGet()
+    {
+        $this->assertSame(0, $this->numberable()->value);
+        $this->assertSame(1, $this->numberable(1)->value);
+        $this->assertSame(1.1, $this->numberable(1.1)->value);
+    }
+
+    public function testStringCast()
+    {
+        $this->assertSame('0', (string) $this->numberable());
+        $this->assertSame('1', (string) $this->numberable(1));
+        $this->assertSame('1.1', (string) $this->numberable(1.1));
+    }
+}