explicitly initializing

[Bob Smith]

Given this:

<snip>
typedef std::map<string, QxEvent> QxEventContainerBase;

class QxEventContainer:public QxEventContainerBase{
public:
//!Default constructor
QxEventContainer();
QxEventContainer( const QxEventContainer & ec );
QxEventContainer & operator=( const QxEventContainer& ec );

......
};

QxEventContainer::QxEventContainer( const QxEventContainer & ec ){
*this::
m_interval = ec.m_interval;
}
QxEventContainer & QxEventContainer::operator=( const QxEventContainer&
ec ){
if ( this != &ec ){
m_interval = ec.m_interval;
}
return *this;
}

</snip>
I have a typedef as a base class for a container type class. Now I get a
warning saying that the template *should* be explicitly initialized in
the copy constructor. Now, what does that mean?and how do I fix it.
Thank's for any help.
This is the error I get:

qxeventcontainer.cpp:11: warning: base class `class
map<basic_string<char,string_char_traits<char>,__d efault_alloc_template<true,0>

,QxEvent,less<basic_string<char,string_char_trait s<char>,__default_alloc_template<true,0> > >,__default_alloc_template<true,0> >' should be explicitly initialized in the copy constructor

regards
/B

[Victor Bazarov]

"Bob Smith" <bo******@jippii.fi> wrote...

Given this:

<snip>
typedef std::map<string, QxEvent> QxEventContainerBase;

class QxEventContainer:public QxEventContainerBase{
public:
//!Default constructor
QxEventContainer();
QxEventContainer( const QxEventContainer & ec );
QxEventContainer & operator=( const QxEventContainer& ec );

.....
};

QxEventContainer::QxEventContainer( const QxEventContainer & ec ){
*this::
m_interval = ec.m_interval;
}
QxEventContainer & QxEventContainer::operator=( const QxEventContainer&
ec ){
if ( this != &ec ){
m_interval = ec.m_interval;
}
return *this;
}

</snip>
I have a typedef as a base class for a container type class. Now I get a
warning saying that the template *should* be explicitly initialized in
the copy constructor. Now, what does that mean?and how do I fix it.
Thank's for any help.
This is the error I get:

qxeventcontainer.cpp:11: warning: base class `class
map<basic_string<char,string_char_traits<char>,__d efault_alloc_template<true
,0>
,QxEvent,less<basic_string<char,string_char_trait s<char>,__default_alloc_te

mplate<true,0> > >,__default_alloc_template<true,0> >' should be explicitly
initialized in the copy constructor

std::map<>'s default c-tor is declared "explicit". Since you're
inheriting from std::map, you need to construct the base class
explicitly in the copy c-tor, because if the initialisation is
omitted, the default initialisation is used, and for std::map it
is "explicit".

Victor