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base/include: use C++20 function template syntax

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Issue #5227
This commit is contained in:
Norman Feske
2024-05-22 16:35:38 +02:00
committed by Christian Helmuth
parent 48d6f0220c
commit 5e862b2cd3
38 changed files with 173 additions and 254 deletions
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20
repos/base/include/util/retry.h
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@ -17,9 +17,9 @@
namespace Genode {
template <typename EXC, typename FUNC, typename HANDLER>
auto retry(FUNC func, HANDLER handler,
unsigned attempts = ~0U) -> decltype(func());
template <typename EXC>
auto retry(auto const &fn, auto const &,
unsigned attempts = ~0U) -> decltype(fn());
}
/**
@ -29,20 +29,20 @@ namespace Genode {
* is called and the function call is retried.
*
* \param EXC exception type to handle
* \param func functor to execute
* \param handler exception handler executed if 'func' raised an exception
* \param fn functor to execute
* \param exc_fn exception handler executed if 'fn' raised an exception
* of type 'EXC'
* \param attempts number of attempts to execute 'func' before giving up
* and reflecting the exception 'EXC' to the caller. If not
* specified, attempt infinitely.
*/
template <typename EXC, typename FUNC, typename HANDLER>
auto Genode::retry(FUNC func, HANDLER handler,
unsigned attempts) -> decltype(func())
template <typename EXC>
auto Genode::retry(auto const &fn, auto const &exc_fn,
unsigned attempts) -> decltype(fn())
{
for (unsigned i = 0; attempts == ~0U || i < attempts; i++)
try { return func(); }
catch (EXC) { handler(); }
try { return fn(); }
catch (EXC) { exc_fn(); }
throw EXC();
}