brzuchal

Sealed classes

Introduction

A sealed type is one for which subclassing is restricted according to subclass names specified with the class’s declaration or to restrict to the same subclass namespace.

Sealed type is more like extended form of finality, where it is possible to list all class names allowed to extending from sealed class or permit only same namespace class to extend sealed class.

brzuchal

string(10) "created_at"
string(10) "2019-02-05"
object(Message)#1 (5) {
  ["id"]=>
  int(999)
  ["title"]=>
  string(12) "Hello World!"
  ["message"]=>
  string(23) "Here is your message..."
  ["time"]=>

brzuchal

FROM alpine:latest as builder

ENV PHP_INI_DIR /etc/php7
ENV PHP_VERSION 7.3.0
ENV PHP_FILENAME php-7.3.0.tar.xz
ENV PHP_SHA256 7d195cad55af8b288c3919c67023a14ff870a73e3acc2165a6d17a4850a560b5

RUN build_pkgs="build-base linux-headers pcre-dev gnupg autoconf file  g++ gcc libc-dev make pkgconf re2c gnupg" \
  && runtime_pkgs="ca-certificates openssl zlib curl" \
  && apk add --update --no-cache --virtual .build-deps ${build_pkgs} \

brzuchal

Introduction

Annotation is a form of syntactic metadata that can be added to source code. Annotations can be embeded in and read using reflection mechanism. Annotations known from Java or so called Attributes in C# and can be retained by VM at run-time and read via reflection. Annotations can be placed in classes, methods, properties and functions.

PHP offers only a single form of such metadata - doc-comments. In userland there exists some annotation reader libraries like Doctrine Annotations which is widely used for eg. to express object-relational mapping metadata.

brzuchal

<?php
require 'autoload.php';

$someObject = new Vendor\Package\SomeClass(); // autoloader tries to load... what exactly??? need to load vendor package.php somehow

brzuchal

diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
index 2941546..b0ca01b 100644
--- a/Zend/zend_language_parser.y
+++ b/Zend/zend_language_parser.y
@@ -221,12 +221,14 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %token T_COALESCE        "?? (T_COALESCE)"
 %token T_POW             "** (T_POW)"
 %token T_POW_EQUAL       "**= (T_POW_EQUAL)"
+%token T_AT				 "@ (T_AT)"
 

brzuchal

<?php
namespace Acme:Animal;

class Cat {
  public function __construct() {
    echo 'Created ' . self::class . ' from package ' . __PACKAGE__;
  }
}

brzuchal

<?php function it($m,$p){echo"\e[3".($p?"2m✔︎":"1m✘")."\e[0m It $m\n";if(!$p){$GLOBALS['e']=1;$d=debug_backtrace()[0];echo"ERROR {$d['file']}@{$d['line']}\n";}}register_shutdown_function(function(){echo"\e[1;3".(($e=@$GLOBALS['e'])?"7;41mFAIL":"2mOK")."\e[0m\n";die($e);});

brzuchal

diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
index 92524c6..8ac8f55 100644
--- a/Zend/zend_language_parser.y
+++ b/Zend/zend_language_parser.y
@@ -240,7 +240,7 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %type <ast> internal_functions_in_yacc
 %type <ast> exit_expr scalar backticks_expr lexical_var function_call member_name property_name
 %type <ast> variable_class_name dereferencable_scalar constant dereferencable
-%type <ast> callable_expr callable_variable static_member new_variable
+%type <ast> callable_expr callable_variable static_member new_variable closure_expr

brzuchal

<?php
/*
 usage: php document.php --ext name [--output document.txt]
*/
function prototype(Reflector $reflector) {
	$elements = [];

	switch (get_class($reflector)) {
		case "ReflectionClass":
			if ($reflector->isFinal()) {