@ 2013-01-11T12:25:55Z <?php
function decorate(callable $fn, callable $decorator)
{
$wrapper = $decorator();
return function() use ($fn, $wrapper) {
$gen = $wrapper();
// Only call the wrapped function if the decorator made "yield"
if (!$gen instanceof \Generator) {
return;
}
// Use the yielded arguments, forward all if none given.
if (is_array($gen->current())) {
$arguments = $gen->current();
} else {
$arguments = func_get_args();
}
// Forward all throwed Exceptions
try {
// Send the decorated function's return value into the
// decorator as return value of "yield"
$gen->send(call_user_func_array($fn, $arguments));
} catch (\Exception $e) {
$gen->throw($e);
}
};
}
function foo($bar)
{
throw new Exception("Error $bar!");
}
function catch_all_exceptions()
{
return function() {
try {
(yield);
} catch (\Exception $e) {
echo "catch_all_exceptions: Caught Exception: $e\n";
}
};
}
function do_something_before()
{
return function() {
echo "Before!\n";
yield;
};
}
$foo = decorate(decorate("foo", "catch_all_exceptions"), "do_something_before");
$foo("bar");
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Output for 7.0.0 - 7.0.20 , 7.1.0 - 7.1.20 , 7.2.6 - 7.2.33 , 7.3.12 - 7.3.33 , 7.4.0 - 7.4.33 , 8.0.0 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.7 Before!
catch_all_exceptions: Caught Exception: Exception: Error bar! in /in/DJQ41:35
Stack trace:
#0 /in/DJQ41(26): foo('bar')
#1 /in/DJQ41(26): {closure}('bar')
#2 /in/DJQ41(58): {closure}('bar')
#3 {main}
Output for 5.5.0 - 5.5.36 , 5.6.0 - 5.6.28 Before!
catch_all_exceptions: Caught Exception: exception 'Exception' with message 'Error bar!' in /in/DJQ41:35
Stack trace:
#0 [internal function]: foo('bar')
#1 /in/DJQ41(26): call_user_func_array('foo', Array)
#2 [internal function]: {closure}('bar')
#3 /in/DJQ41(26): call_user_func_array(Object(Closure), Array)
#4 /in/DJQ41(58): {closure}('bar')
#5 {main}
Output for 5.4.0 - 5.4.45 Before!
Notice: Use of undefined constant yield - assumed 'yield' in /in/DJQ41 on line 53
Output for 5.3.0 - 5.3.29 Catchable fatal error: Argument 1 passed to decorate() must be an instance of callable, string given, called in /in/DJQ41 on line 57 and defined in /in/DJQ41 on line 3
Process exited with code 255 . Output for 5.1.0 - 5.1.6 , 5.2.0 - 5.2.17 Parse error: syntax error, unexpected T_FUNCTION in /in/DJQ41 on line 7
Process exited with code 255 . Output for 5.0.0 - 5.0.5 Parse error: parse error, unexpected T_FUNCTION in /in/DJQ41 on line 7
Process exited with code 255 . Output for 4.4.2 - 4.4.9 Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/DJQ41 on line 3
Process exited with code 255 . Output for 4.3.0 - 4.3.1 , 4.3.5 - 4.3.11 , 4.4.0 - 4.4.1 Parse error: parse error, unexpected T_STRING, expecting ')' in /in/DJQ41 on line 3
Process exited with code 255 . Output for 4.3.2 - 4.3.4 Parse error: parse error, expecting `')'' in /in/DJQ41 on line 3
Process exited with code 255 . preferences:dark mode live preview
246.42 ms | 401 KiB | 348 Q