Lvalue-to-rvalue conversions
If an lvalue appears in a situation in which the compiler expects
an rvalue, the compiler converts the lvalue to an rvalue. The following
table lists exceptions to this:
| Situation before conversion | Resulting behavior |
|---|---|
| The lvalue is a function type. | |
| The lvalue is an array. | |
| The type of the lvalue is an incomplete type. | compile-time error |
| The lvalue refers to an uninitialized object. | undefined behavior |
| The lvalue refers to an object not of the type of the rvalue, nor of a type derived from the type of the rvalue. | undefined behavior |
 The lvalue is a nonclass type, qualified by either const or volatile. |
The type after conversion is not qualified by
either const or volatile. |
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