Types conversions

No-promotion conversions may imply a loss of precision, which the compiler can signal with a warning. This warning can be avoided with an explicit conversion.
For non-fundamental types, arrays and functions implicitly convert to pointers, and pointers in general allow the following conversions:
  • Null pointers can be converted to pointers of any type
  • Pointers to any type can be converted to void pointers.
  • Pointer upcast: pointers to a derived class can be converted to a pointer of an accessible and unambiguous base class, without modifying its const or volatile qualification.
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