lvalue - definizione. Che cos'è lvalue
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Cosa (chi) è lvalue - definizione

DATATYPE IN C++
Reference (c plus plus); Reference (C Plus Plus); Reference type (C++); Reference (C++ type); C++ reference; References in C++; Lvalue reference

lvalue         
WIKIMEDIA DISAMBIGUATION PAGE
Lvalue; L value; L-value (disambiguation); L-values
<programming> A reference to a location, an expression which can appear as the destination of an assignment operator indicating where a value should be stored. For example, a variable or an array element are lvalues but the constant 42 and the expression i+1 are not. A constant string may or may not be an lvalue (it usually is in C). (1995-04-28)
Reference (C++)         
In the C++ programming language, a reference is a simple reference datatype that is less powerful but safer than the pointer type inherited from C. The name C++ reference may cause confusion, as in computer science a reference is a general concept datatype, with pointers and C++ references being specific reference datatype implementations.

Wikipedia

Reference (C++)

In the C++ programming language, a reference is a simple reference datatype that is less powerful but safer than the pointer type inherited from C. The name C++ reference may cause confusion, as in computer science a reference is a general concept datatype, with pointers and C++ references being specific reference datatype implementations. The definition of a reference in C++ is such that it does not need to exist. It can be implemented as a new name for an existing object (similar to rename keyword in Ada).