Adjust code to PHP 8.0

Author: dazet

docs/examples.md

@@ -54,13 +54,6 @@ function it_can_be_created_from_float()
         $this->toNumber()->shouldBe(123.66);
     }
 
-    function it_can_be_created_from_numeric_string()
-    {
-        $this->beConstructedThrough('from', ['123.66']);
-
-        $this->toNumber()->shouldBe(123.66);
-    }
-
     function it_compares_int_with_numbers_just_like_scalars()
     {
         $this->beConstructedWith(new JustInteger(123));

spec/PlainNumberSpec.php

@@ -7,44 +7,44 @@ interface NumberValue extends Value, Numberable
     // comparators
 
     /**
-     * @param int|float|numeric-string|Numberable $other
-     * @return int {-1, 0, 1}
+     * @param float|int|numeric-string|Numberable $other
+     * @return int<-1,1>
      */
-    public function compare($other): int;
+    public function compare(float|int|string|Numberable $other): int;
 
     /**
-     * @param int|float|numeric-string|Numberable $other
+     * @param float|int|numeric-string|Numberable $other
      */
-    public function equals($other): bool;
+    public function equals(float|int|string|Numberable $other): bool;
 
     // basic math
 
     /**
-     * @param int|float|numeric-string|Numberable $other
+     * @param float|int|numeric-string|Numberable $other
      */
-    public function add($other): NumberValue;
+    public function add(float|int|string|Numberable $other): NumberValue;
 
     /**
-     * @param int|float|numeric-string|Numberable $other
+     * @param float|int|numeric-string|Numberable $other
      */
-    public function subtract($other): NumberValue;
+    public function subtract(float|int|string|Numberable $other): NumberValue;
 
     /**
-     * @param int|float|numeric-string|Numberable $other
+     * @param float|int|numeric-string|Numberable $other
      */
-    public function multiply($other): NumberValue;
+    public function multiply(float|int|string|Numberable $other): NumberValue;
 
     /**
-     * @param int|float|numeric-string|Numberable $other
+     * @param float|int|numeric-string|Numberable $other
      */
-    public function divide($other): NumberValue;
+    public function divide(float|int|string|Numberable $other): NumberValue;
 
     public function abs(): NumberValue;
 
     /**
-     * @param int|float|numeric-string|Numberable $divider
+     * @param float|int|numeric-string|Numberable $divider
      */
-    public function modulo($divider): NumberValue;
+    public function modulo(float|int|string|Numberable $divider): NumberValue;
 
     // rounding
 

src/NumberValue.php

@@ -4,8 +4,5 @@
 
 interface Numberable
 {
-    /**
-     * @return int|float
-     */
-    public function toNumber();
+    public function toNumber(): float|int;
 }

src/Numberable.php

@@ -7,15 +7,12 @@
 
 final class Absolute implements Numberable
 {
-    private Numberable $numberable;
-
-    public function __construct(Numberable $numberable)
-    {
-        $this->numberable = $numberable;
+    public function __construct(
+        private Numberable $numberable,
+    ) {
     }
 
-    /** @return int|float */
-    public function toNumber()
+    public function toNumber(): float|int
     {
         return abs($this->numberable->toNumber());
     }

src/Numberable/Absolute.php

@@ -6,17 +6,13 @@
 
 final class Add implements Numberable
 {
-    private Numberable $leftTerm;
-    private Numberable $rightTerm;
-
-    public function __construct(Numberable $leftTerm, Numberable $rightTerm)
-    {
-        $this->leftTerm = $leftTerm;
-        $this->rightTerm = $rightTerm;
+    public function __construct(
+        private Numberable $leftTerm,
+        private Numberable $rightTerm,
+    ) {
     }
 
-    /** @return int|float */
-    public function toNumber()
+    public function toNumber(): float|int
     {
         return $this->leftTerm->toNumber() + $this->rightTerm->toNumber();
     }

src/Numberable/Add.php

@@ -9,17 +9,13 @@
 
 final class Average implements Numberable
 {
-    /** @var Arrayable<Numberable> */
-    private Arrayable $terms;
-
-    /** @param Arrayable<Numberable> $terms */
-    public function __construct(Arrayable $terms)
-    {
-        $this->terms = $terms;
+    public function __construct(
+        /** @var Arrayable<Numberable> */
+        private Arrayable $terms,
+    ) {
     }
 
-    /** @return int|float */
-    public function toNumber()
+    public function toNumber(): float|int
     {
         $terms = $this->terms->toArray();
         $count = count($terms);

src/Numberable/Average.php

@@ -6,19 +6,18 @@
 
 final class Calculate implements Numberable
 {
-    private Numberable $numberable;
     /** @var callable(int|float):(int|float|Numberable) */
     private $formula;
 
     /** @param callable(int|float):(int|float|Numberable) $formula */
-    public function __construct(Numberable $numberable, callable $formula)
-    {
-        $this->numberable = $numberable;
+    public function __construct(
+        private Numberable $numberable,
+        callable $formula,
+    ) {
         $this->formula = $formula;
     }
 
-    /** @return int|float */
-    public function toNumber()
+    public function toNumber(): float|int
     {
         $result = ($this->formula)($this->numberable->toNumber());
 

src/Numberable/Calculate.php

@@ -7,11 +7,9 @@
 
 final class Ceil implements Numberable
 {
-    private Numberable $numberable;
-
-    public function __construct(Numberable $numberable)
-    {
-        $this->numberable = $numberable;
+    public function __construct(
+        private Numberable $numberable,
+    ) {
     }
 
     public function toNumber(): float

src/Numberable/Ceil.php

@@ -6,11 +6,9 @@
 
 final class CompareAsInt
 {
-    private int $direction;
-
-    private function __construct(int $direction)
-    {
-        $this->direction = $direction;
+    private function __construct(
+        private int $direction,
+    ) {
     }
 
     public static function asc(): self