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AK: Simplify constructors and conversions from nullptr_t

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Problem:
- Many constructors are defined as `{}` rather than using the ` =
  default` compiler-provided constructor.
- Some types provide an implicit conversion operator from `nullptr_t`
  instead of requiring the caller to default construct. This violates
  the C++ Core Guidelines suggestion to declare single-argument
  constructors explicit
  (https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c46-by-default-declare-single-argument-constructors-explicit).

Solution:
- Change default constructors to use the compiler-provided default
  constructor.
- Remove implicit conversion operators from `nullptr_t` and change
  usage to enforce type consistency without conversion.
This commit is contained in:
Lenny Maiorani 2021-01-10 16:29:28 -07:00 • committed by Andreas Kling
parent 9dc44bf8c4
commit e6f907a155
105 changed files with 300 additions and 244 deletions
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2
Kernel/Net/Routing.cpp
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@ -230,7 +230,7 @@ RoutingDecision route_to(const IPv4Address& target, const IPv4Address& source, c
adapter->send({ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, request);
Optional<MACAddress> addr;
if (!Thread::current()->block<ARPTableBlocker>(nullptr, next_hop_ip, addr).was_interrupted()) {
if (!Thread::current()->block<ARPTableBlocker>({}, next_hop_ip, addr).was_interrupted()) {
if (addr.has_value()) {
#ifdef ROUTING_DEBUG
klog() << "Routing: Got ARP response using adapter " << adapter->name().characters() << " for " << next_hop_ip.to_string().characters() << " (" << addr.value().to_string().characters() << ")";