rspec/rules/S5184/cfamily/rule.adoc

The RAII idiom associates the lifetime of a resource with the lifetime of an object: The resource is acquired when the object is created, and released when it is destroyed.


If the object that controls the resource lifetime is a temporary, chances are it will get destroyed while the resource should still be in use, leading to resource corruption. This rule detects temporaries that look like RAII objects.


== Noncompliant Code Example

----
void f() {
  scoped_lock{myMutex}; // Noncompliant. The mutex will be locked then immediately unlocked
  protectedCode(); // This code is not protected by the mutex
}
----


== Compliant Solution

----
void f() {
  scoped_lock lock{myMutex}; // Compliant
  protectedCode();
  // The mutex is correctly released at this point
}
----


== See

* https://github.com/isocpp/CppCoreGuidelines/blob/036324/CppCoreGuidelines.md#es84-dont-try-to-declare-a-local-variable-with-no-name[{cpp} Core Guidelines ES.84] - Don’t (try to) declare a local variable with no name


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