MISRA.CTOR.NOT_EXPLICIT

Constructor with one argument of built-in type is not declared 'explicit'.

MISRA-C++ Rule 12-1-3 (required): All constructors that are callable with a single argument of fundamental type shall be declared explicit.

Rationale

The explicit keyword prevents the constructor from being used to implicitly convert from a fundamental type to the class type.

Example

class C
{
public:
   C ( int32_t a )            // Non-compliant
   {
   }
};

class D
{
public:
   explicit D ( int32_t a )   // Compliant
   {
   }
};