8 Expressions [expr]

8.4 Primary expressions [expr.prim]

8.4.4 Names [expr.prim.id]

8.4.4.1 Unqualified names [expr.prim.id.unqual]

unqualified-id:
	identifier
	operator-function-id
	conversion-function-id
	literal-operator-id
	~ class-name
	~ decltype-specifier
	template-id
An identifier is an id-expression provided it has been suitably declared ([dcl.dcl]).
[Note
:
A class-name or decltype-specifier prefixed by ~ denotes a destructor; see [class.dtor].
Within the definition of a non-static member function, an identifier that names a non-static member is transformed to a class member access expression ([class.mfct.non-static]).
end note
]
The type of the expression is the type of the identifier.
The result is the entity denoted by the identifier.
The expression is an lvalue if the entity is a function, variable, or data member and a prvalue otherwise; it is a bit-field if the identifier designates a bit-field ([dcl.struct.bind]).