5 Expressions [expr]

The noexcept operator determines whether the evaluation of its operand, which is an unevaluated operand (Clause [expr]), can throw an exception ([except.throw]).

noexcept-expression:
  noexcept ( expression )

The result of the noexcept operator is a constant of type bool and is a prvalue.

The result of the noexcept operator is false if in a potentially-evaluated context the expression would contain

• (3.1)

  a potentially-evaluated call83 to a function, member function, function pointer, or member function pointer that does not have a non-throwing exception-specification ([except.spec]), unless the call is a constant expression ([expr.const]),

• (3.2)

  a potentially-evaluated throw-expression ([except.throw]),

• (3.3)

  a potentially-evaluated dynamic_cast expression dynamic_cast<T>(v), where T is a reference type, that requires a run-time check ([expr.dynamic.cast]), or

• (3.4)

  a potentially-evaluated typeid expression ([expr.typeid]) applied to a glvalue expression whose type is a polymorphic class type ([class.virtual]).

Otherwise, the result is true.