Synopsis

(Required) All constructors that are callable with a single argument of fundamental type shall be declared explicit.

Enabled by default

Yes

Severity/Certainty

Low/Medium

Full description

Constructors that can be called with a single argument are not declared explicit. Conversion operators shall also be set explicit. This check is identical to CPU-ctor-implicit, MISRAC++2023-15.1.3.

Coding standards

Code examples

The following code example fails the check and will give a warning:

class C{
  C(double x){} //should be explicit
};

The following code example passes the check and will not give a warning about this issue:

class C{
  explicit C(double x){} //OK
};