7 Expressions [expr]

7.5 Primary expressions [expr.prim]

7.5.5 Names [expr.prim.id] Destruction [expr.prim.id.dtor]

An id-expression that denotes the destructor of a type T names the destructor of T if T is a class type ([class.dtor]), otherwise the id-expression is said to name a pseudo-destructor.
If the id-expression names a pseudo-destructor, T shall be a scalar type and the id-expression shall appear as the right operand of a class member access ([expr.ref]) that forms the postfix-expression of a function call ([expr.call]).
[Note 1: 
Such a call ends the lifetime of the object ([expr.call], [basic.life]).
— end note]
[Example 1: struct C { }; void f() { C * pc = new C; using C2 = C; pc->C::~C2(); // OK, destroys *pc C().C::~C(); // undefined behavior: temporary of type C destroyed twice using T = int; 0 .T::~T(); // OK, no effect 0.T::~T(); // error: 0.T is a user-defined-floating-point-literal ([lex.ext]) } — end example]