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@ 2015-04-28T19:11:04Z

<?php

function executeFns(Generator $fnProvider, $args = [])
{
	$lastResult = 0;
    while ($fnProvider->valid()) {
	    try {
	    	$fn = $fnProvider->current();
	    	$lastResult = $fn($lastResult);
	        $fnProvider->send($lastResult);
	    } catch (Exception $e) {
	        $fnProvider->throw($e);
	    }
	}
}

$fns = [
    function ($n) { return $n + 1; },
    function ($n) { return $n + 2; },
    function ($n) { return $n + 3; },
    function ($n) { return $n + 4; },
    function ($n) { throw new Exception('Throwin\' \'cepshuns, just cuz!'); }
];

function debuggingFnProvider(array $fns)
{
    foreach ($fns as $fn) {
        try {
            $result = (yield $fn);
            echo "Result: {$result}\n";
        } catch (Exception $e) {
            echo "Error: " . $e->getMessage() . "\n";
        }
    }
}

executeFns(debuggingFnProvider($fns));

Output for git.master, git.master_jit, rfc.property-hooks: Result: 1 Result: 3 Result: 6 Result: 10 Error: Throwin' 'cepshuns, just cuz!

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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