singleton_source.cpp

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#ifndef Om_Source_SingletonSource_
 
    #include "om/source/singleton_source.hpp"
 
#else
 
// MARK: - Om::Source::SingletonSource
 
    #define Template_ \
    template <typename ThisItem>
 
    #define Type_ \
    Om::Source::SingletonSource<ThisItem>
 
// MARK: public (non-static)
 
Template_
inline Type_::SingletonSource():
thisItem() {}
 
Template_
inline Type_::SingletonSource(ThisItem & theItem):
thisItem(&theItem) {}
 
Template_
inline Type_ & Type_::operator =(SingletonSource theSingletonSource) {
    this->Swap(theSingletonSource);
    return *this;
}
 
Template_
inline bool Type_::operator !() const {
    return !this->thisItem;
}
 
Template_
inline ThisItem & Type_::operator *() const {
    assert(this->thisItem);
    return *this->thisItem;
}
 
Template_
inline bool Type_::Equals(SingletonSource const & theSingletonSource) const {
    return this->thisItem == theSingletonSource.thisItem;
}
 
Template_
inline void Type_::Pop() {
    assert(this->thisItem);
    this->thisItem = 0;
}
 
Template_
inline void Type_::Swap(SingletonSource & theSingletonSource) {
    boost::swap(
        this->thisItem,
        theSingletonSource.thisItem
    );
}
 
    #undef Type_
    #undef Template_
 
// MARK: - Om::Source::
 
    #define Template_ \
    template <typename TheItem>
 
    #define Type_ \
    Om::Source::SingletonSource<TheItem>
 
Template_
inline bool Om::Source::operator ==(
    Type_ const & theFirst,
    Type_ const & theSecond
) {
    return theFirst.Equals(theSecond);
}
 
Template_
inline bool Om::Source::operator !=(
    Type_ const & theFirst,
    Type_ const & theSecond
) {
    return !theFirst.Equals(theSecond);
}
 
// MARK: - boost::
 
Template_
inline void boost::swap(
    Type_ & theFirst,
    Type_ & theSecond
) {
    theFirst.Swap(theSecond);
}
 
    #undef Type_
    #undef Template_
 
#endif