The operator== and similar should not be member of the class. This
ensure a symertry.
Indeed, consider this code
string == string1 + string2;
string1 + string2 == string;
The first line compile fine even if QStringBuilder is used, because
QStringBuilder will be converted to QString implicitly.
But the second line do not compile if the operator== is a member of
QString, because the implicit conversion rules do not apply.
For this reason, the symetric operators should not be declared as
member.
Change-Id: I3f7c11fab45a9133f7a424bdfcb894f97da9282b
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
c06e932c73