Online PHP editor | rfc for STpuP

@ 2017-06-19T19:58:29Z

<?php

interface ProcessInterface
{
}

interface RewindIterator extends Iterator
{
    public function previous(): void;
}

interface ProcessListInterface extends RewindIterator
{
    public function append(ProcessInterface $process): void;
    public function clear(): void;
    public function isEmpty(): bool;
}

final class ProcessList implements ProcessListInterface
{
    private $processes = [];

    public function __construct(array $processes = [])
    {
        foreach ($processes as $process) {
            $this->append($process);
        }
    }

    public function append(ProcessInterface $process): void
    {
        $this->processes[] = $process;
    }

    public function clear(): void
    {
        $this->processes = [];
    }

    public function isEmpty(): bool
    {
        return empty($this->processes);
    }

    public function rewind(): ProcessInterface
    {
        return reset($this->processes);
    }

    public function current(): ProcessInterface
    {
        return current($this->processes);
    }

    public function key(): int
    {
        return key($this->processes);
    }

    public function next(): ProcessInterface
    {
        return next($this->processes);
    }
    
    public function previous(): ProcessInterface
    {
        return prev($this->processes);
    }

    public function valid(): bool
    {
        return key($this->processes) !== null;
    }
}

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Declaration of ProcessList::previous(): ProcessInterface must be compatible with RewindIterator::previous(): void in /in/STpuP on line 65
Process exited with code 255.

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