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2017-25 © Pedro Peláez
ThrowableGenerator
Generator wrapper for yield be sequential regardless of using Generator::throw., (*1)
From top level view, Generator::throw discards next value from generator,
but it's not completely lost, but instead it becames return value of throw() method., (*2)
This is rather inconvenient if you want values be returned by yield., (*3)
<?php
function generator() {
foreach (range(1, 6) as $x) {
try {
yield $x;
} catch (Throwable $e) {
echo " !! exception: {$e->getMessage()}\n";
}
}
}
$generator = generator();
foreach ($generator as $x) {
echo "process: $x\n";
if ($x % 2 === 0) {
$generator->throw(new RuntimeException($x));
}
}
The above code prints:, (*4)
process: 1 process: 2 !! exception: 2 process: 4 !! exception: 4 process: 6 !! exception: 6
i.e values 3 and 5 were "lost" by using throw. This library makes result to be:, (*5)
process: 1 process: 2 !! exception: 2 process: 3 process: 4 !! exception: 4 process: 5 process: 6 !! exception: 6
See question and discussion on stackoverflow post, (*6)
To use this class, wrap your original generator with this class:, (*7)
$generator = new ThrowableGenerator($generator);
Note: There is API change, throw() will return nothing instead of next value from generator., (*8)
ThrowableGenerator
MIT
ThrowableGenerator
MIT
ThrowableGenerator
MIT
ThrowableGenerator
MIT