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<?php |
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namespace FunctionalPHP\Trampoline; |
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/** |
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* This method should be used inside your recursive functions |
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* when you need to make a tail recursive call. |
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* |
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* Instead of calling the function directly it will give back |
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* the control to the trampoline which will in turn call your |
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* function again in order to avoid a stack overflow. |
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* |
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* @param callable $f a tail recursive function |
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* @param array ...$args arguments for the function |
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* @return callable a callable for the Trampoline |
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*/ |
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function bounce(callable $f, ...$args) |
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{ |
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return Trampoline::bounce($f, ...$args); |
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} |
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/** |
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* Launch a trampoline. The given callable should be a tail |
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* recursive function. |
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* |
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* All recursive calls inside the function should be made |
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* using the bounce function so that the trampoline can |
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* correctly avoid stack overflows. |
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* |
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* @param callable $f a tail recursive function |
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* @param array ...$args arguments for the function |
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* @return mixed The final result of your function |
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*/ |
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function trampoline(callable $f, ...$args) |
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{ |
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return Trampoline::run($f, ...$args); |
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} |
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function trampoline_wrapper(callable $f) |
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{ |
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return function(...$args) use($f) { |
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return Trampoline::run($f, ...$args); |
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}; |
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} |
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/** |
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* Alternative method to get a tail recursive function |
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* without risk of stack overflows. |
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* |
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* All recursive calls inside the function should be made |
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* by using the `$this` directly as a function. |
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* |
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* @param callable $f a tail recursive function |
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* @return callable equivalent function without stack overflow risk |
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*/ |
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function pool(callable $f) |
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{ |
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return Pool::get($f); |
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} |
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functional-php /
trampoline
