Update PHP language level & better RFC compliance

.gitignore

@@ -1,4 +1,5 @@
 /vendor/
 /.idea/
 /composer.lock
-/.phpunit.result.cache
+/.phpunit.result.cache
+.phpcs-cache

composer.json

@@ -1,9 +1,15 @@
 {
 	"name": "simshaun/recurr",
+	"type": "library",
 	"description": "PHP library for working with recurrence rules",
-	"keywords": ["rrule", "recurrence", "recurring", "events", "dates"],
+	"keywords": [
+		"rrule",
+		"recurrence",
+		"recurring",
+		"events",
+		"dates"
+	],
 	"homepage": "https://github.com/simshaun/recurr",
-	"type": "library",
 	"license": "MIT",
 	"authors": [
 		{
@@ -13,12 +19,18 @@
 		}
 	],
 	"require": {
-		"php": "^7.2||^8.0",
-		"doctrine/collections": "~1.6"
+		"php": "^8.0",
+		"doctrine/collections": "^1.6"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^8.5.16",
-		"symfony/yaml": "^5.3"
+		"phpunit/phpunit": "^8.5 || ^9.0",
+		"squizlabs/php_codesniffer": "^3.6",
+		"symfony/yaml": "^5.3 || ^6.0"
+	},
+	"extra": {
+		"branch-alias": {
+			"dev-master": "0.x-dev"
+		}
 	},
 	"autoload": {
 		"psr-4": {
@@ -30,11 +42,6 @@
 			"Recurr\\Test\\": "tests/Recurr/Test"
 		}
 	},
-	"extra": {
-		"branch-alias": {
-			"dev-master": "0.x-dev"
-		}
-	},
 	"scripts": {
 		"test": "./vendor/bin/phpunit --color=always"
 	}

phpcs.xml.dist

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<ruleset
+        name="PHPCS Coding Standards"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd"
+>
+    <arg name="basepath" value="."/>
+    <arg name="extensions" value="php"/>
+    <arg name="colors" />
+    <arg name="cache" value=".phpcs-cache"/>
+
+    <!-- Ignore warnings, show progress of the run and show sniff names -->
+    <arg value="nps"/>
+
+    <rule ref="PSR12"/>
+
+    <file>src</file>
+    <file>tests</file>
+
+</ruleset>

phpunit.xml.dist

@@ -1,24 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         backupGlobals="false"
-         backupStaticAttributes="false"
          bootstrap="./tests/bootstrap.php"
-         colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/8.5/phpunit.xsd">
-  <testsuites>
-    <testsuite name="Recurr Test Suite">
-      <directory suffix="Test.php">./tests/Recurr/Test/</directory>
-    </testsuite>
-  </testsuites>
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+>
 
-  <filter>
-    <whitelist>
-      <directory suffix=".php">./src/Recurr/</directory>
-    </whitelist>
-  </filter>
+    <coverage>
+        <include>
+            <directory suffix=".php">./src/Recurr/</directory>
+        </include>
+    </coverage>
+
+    <testsuites>
+        <testsuite name="Recurr Test Suite">
+            <directory>./tests/Recurr/Test/</directory>
+        </testsuite>
+    </testsuites>
 </phpunit>

src/Recurr/DateExclusion.php

@@ -9,6 +9,8 @@
 
 namespace Recurr;
 
+use DateTimeInterface;
+
 /**
  * Class DateExclusion is a container for a single \DateTimeInterface.
  *
@@ -23,23 +25,21 @@
  */
 class DateExclusion
 {
-    /** @var \DateTimeInterface */
-    public $date;
+    public DateTimeInterface $date;
 
     /** @var bool Day of year */
-    public $hasTime;
+    public bool $hasTime;
 
-    /** @var bool */
-    public $isUtcExplicit;
+    public bool $isUtcExplicit;
 
     /**
      * Constructor
      *
-     * @param \DateTimeInterface $date
+     * @param DateTimeInterface $date
      * @param bool               $hasTime
      * @param bool               $isUtcExplicit
      */
-    public function __construct(\DateTimeInterface $date, $hasTime = true, $isUtcExplicit = false)
+    public function __construct(DateTimeInterface $date, bool $hasTime = true, bool $isUtcExplicit = false)
     {
         $this->date          = $date;
         $this->hasTime       = $hasTime;

src/Recurr/DateInclusion.php

@@ -9,6 +9,8 @@
 
 namespace Recurr;
 
+use DateTimeInterface;
+
 /**
  * Class DateInclusion is a container for a single \DateTimeInterface.
  *
@@ -23,23 +25,21 @@
  */
 class DateInclusion
 {
-    /** @var \DateTimeInterface */
-    public $date;
+    public DateTimeInterface $date;
 
     /** @var bool Day of year */
-    public $hasTime;
+    public bool $hasTime;
 
-    /** @var bool */
-    public $isUtcExplicit;
+    public bool $isUtcExplicit;
 
     /**
      * Constructor
      *
-     * @param \DateTimeInterface $date
+     * @param DateTimeInterface $date
      * @param bool               $hasTime
      * @param bool               $isUtcExplicit
      */
-    public function __construct(\DateTimeInterface $date, $hasTime = true, $isUtcExplicit = false)
+    public function __construct(DateTimeInterface $date, bool $hasTime = true, bool $isUtcExplicit = false)
     {
         $this->date          = $date;
         $this->hasTime       = $hasTime;

src/Recurr/DateInfo.php

@@ -13,6 +13,8 @@
 
 namespace Recurr;
 
+use DateTimeInterface;
+
 /**
  * Class DateInfo is responsible for holding information based on a particular
  * date that is applicable to a Rule.
@@ -22,52 +24,51 @@
  */
 class DateInfo
 {
-    /** @var \DateTime */
-    public $dt;
+    public DateTimeInterface $dt;
 
     /**
      * @var int Number of days in the month.
      */
-    public $monthLength;
+    public int $monthLength;
 
     /**
      * @var int Number of days in the year (365 normally, 366 on leap years)
      */
-    public $yearLength;
+    public int $yearLength;
 
     /**
      * @var int Number of days in the next year (365 normally, 366 on leap years)
      */
-    public $nextYearLength;
+    public int $nextYearLength;
 
     /**
      * @var array Day of year of last day of each month.
      */
-    public $mRanges;
+    public array $mRanges;
 
     /** @var int Day of week */
-    public $dayOfWeek;
+    public int $dayOfWeek;
 
     /** @var int Day of week of the year's first day */
-    public $dayOfWeekYearDay1;
+    public int $dayOfWeekYearDay1;
 
     /**
      * @var array Month number for each day of the year.
      */
-    public $mMask;
+    public array $mMask;
 
     /**
      * @var array Month-daynumber for each day of the year.
      */
-    public $mDayMask;
+    public array $mDayMask;
 
     /**
      * @var array Month-daynumber for each day of the year (in reverse).
      */
-    public $mDayMaskNeg;
+    public array $mDayMaskNeg;
 
     /**
      * @var array Day of week (0-6) for each day of the year, 0 being Monday
      */
-    public $wDayMask;
+    public array $wDayMask;
 }