C++ Primer, Fifth Edition

4.11.2. Other Implicit Conversions

In addition to the arithmetic conversions, there are several additional kinds of implicit conversions. These include:

Array to Pointer Conversions: In most expressions, when we use an array, the array is automatically converted to a pointer to the first element in that array:

int ia[10];   // array of ten intsint* ip = ia; // convert ia to a pointer to the first element

This conversion is not performed when an array is used with decltype or as the operand of the address-of (&), sizeof, or typeid (which we’ll cover in § 19.2.2 (p. 826)) operators. The conversion is also omitted when we initialize a reference ...