Online PHP editor | rfc for 8T21V

@ 2016-01-15T11:52:45Z

<?php

class Condition {
    
    var $causedNext = false;
    var $cause = null;
    
    public function __construct($at, $next = null) {
        $this->at = $at;
        $this->next = $next;
    }
    
    public function evalCondition() {
        $this->causedNext = false;
        $result = $this->actualEval();
        if ($result !== false && $this->next) {
            $result = $this->next->evalCondition();
            if ($result === false)
                $this->causedNext = true;
        }
        return $result;
    }
    
    public function actualEval() {
        return false;
    }
    
    public function getCause() {
        return $this->causedNext ? $this->next->getCause() : $this->cause;
    }
    
}

class Condition1 extends Condition {
    
    public function __construct($at, $next = null) {
        parent::__construct($at, $next);
        $this->cause = "cause 1";
    }
    
    public function actualEval() {
        return $this->at->condition1;
    }
    
}

class Condition2 extends Condition {
    
    public function __constructor($at, $next = null) {
        parent::__constructor($at, $next);
        $this->cause = "cause 2";
    }
    
    public function actualEval() {
        return $this->at->condition2;
    }
    
}

class X {

    var $condition1 = false;
    var $condition2 = false;

    public function __construct($c1, $c2) {
        $this->condition1 = $c1;
        $this->condition2 = $c2;
    }
    
    protected function check(\Closure $callback) {
        $condition = new Condition1(
            $this, 
            new Condition2($this)
        );
        
        if (!$condition->evalCondition()) {
            $this->log($condition->getCause());
        } else
            return $callback();
            
        $this->cleanup();
        return null;
    }

    public function doSomething() {
        $this->check(function () {
            return $this->reallyDoSomething();
        });
    }
    
    public function reallyDoSomething() {
        echo "Done!";
    }
    
    public function cleanup() {
        echo "> cleanup.\n";
    }
    
    public function log($str) {
        echo "> $str\n";
    }
    
}

echo "f, f\n";
$x = new X(false, false);
$x->doSomething();

echo "f, t\n";
$x = new X(false, true);
$x->doSomething();

echo "t, f\n";
$x = new X(true, false);
$x->doSomething();

echo "t, t\n";
$x = new X(true, true);
$x->doSomething();

Output for git.master, git.master_jit, rfc.property-hooks: f, f Deprecated: Creation of dynamic property Condition2::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition2::$next is deprecated in /in/8T21V on line 10 Deprecated: Creation of dynamic property Condition1::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition1::$next is deprecated in /in/8T21V on line 10 > cause 1 > cleanup. f, t Deprecated: Creation of dynamic property Condition2::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition2::$next is deprecated in /in/8T21V on line 10 Deprecated: Creation of dynamic property Condition1::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition1::$next is deprecated in /in/8T21V on line 10 > cause 1 > cleanup. t, f Deprecated: Creation of dynamic property Condition2::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition2::$next is deprecated in /in/8T21V on line 10 Deprecated: Creation of dynamic property Condition1::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition1::$next is deprecated in /in/8T21V on line 10 > > cleanup. t, t Deprecated: Creation of dynamic property Condition2::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition2::$next is deprecated in /in/8T21V on line 10 Deprecated: Creation of dynamic property Condition1::$at is deprecated in /in/8T21V on line 9 Deprecated: Creation of dynamic property Condition1::$next is deprecated in /in/8T21V on line 10 Done!

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