rspec/rules/S1024/cfamily/rule.adoc

== Why is this an issue?

Argument-dependent lookup (ADL) adds additional associated namespaces to the set of scopes searched when lookup is performed for the names of called functions. A generic function found in one of these additional namespaces would be added to the overload set and chosen by overload resolution, which is inconsistent with developer expectation.


=== Noncompliant code example

[source,cpp]
----
template <typename T>
class B
{
public:
  B operator+ ( long & rhs );
  void f ( )
  {
    *this + 10; // calls NS::operator+ and not B<NS::A>::operator+ when B is instantiated with NS::A
  }
};

namespace NS
{
  class A {
  public:
  };
  template <typename T>
  bool operator+ ( T, int32_t ); // Noncompliant, within associated namespace
}
template class B<NS::A>;
----


== Resources

* MISRA {cpp}:2008, 14-5-1