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Removed ambiguity of casts

This commit is contained in:
Daniel Russel 2006-05-03 11:41:06 +00:00
parent 5d8cf629f6
commit 906e7e1645
1 changed files with 77 additions and 64 deletions
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141
Kinetic_data_structures/include/CGAL/Tools/Label.h
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@ -28,81 +28,94 @@ CGAL_BEGIN_NAMESPACE
//! A type which provides opaque, typed identifiers.
/*!
Basically this is just an int with a type associated with it
and one value (-1) picked out as the null value. It implements
comparisons and things.
Basically this is just an int with a type associated with it
and one value (-1) picked out as the null value. It implements
comparisons and things.
*/
template <class A_Type>
class Label
{
protected:
typedef Label<A_Type> This;
int id_;
protected:
typedef Label<A_Type> This;
int id_;
public:
//! Construct it from an int
Label(int i):id_(i){}
//! Construct a default (null) label
Label():id_(-1) {
if(0) print(); // make sure it is compiled
}
//! Make the next label
This next_label() {
return Label(id_+1);
}
//! Return the null label
operator bool() const
{
return id_ != -1;
}
//! Convert to an index value, -1 is invalid
int index() const
{
return id_;
}
bool operator<(const This &o) const
{
return id_ < o.id_;
}
bool operator>(const This &o) const
{
return id_ > o.id_;
}
bool operator==(const This &o) const
{
return id_ ==o.id_;
}
bool operator!=(const This &o) const
{
return id_ !=o.id_;
}
public:
//! Construct it from an int
Label(int i):id_(i){}
//! Construct a default (null) label
Label():id_(-1) {
if(0) print(); // make sure it is compiled
}
//! Make the next label
This next_label() {
return Label(id_+1);
}
//! Return the null label
operator bool() const
{
return id_ != -1;
}
operator int() const {
// I need this because otherwise a pathway through bool is used implicitly
bool use_index_instead;
CGAL_assertion(false);
return id_;
}
operator unsigned int() const {
// I need this because otherwise a pathway through bool is used implicitly
bool use_index_instead;
CGAL_assertion(false);
return id_;
}
//! Convert to an index value, -1 is invalid
int index() const
{
return id_;
}
bool operator<(const This &o) const
{
return id_ < o.id_;
}
bool operator>(const This &o) const
{
return id_ > o.id_;
}
bool operator==(const This &o) const
{
return id_ ==o.id_;
}
bool operator!=(const This &o) const
{
return id_ !=o.id_;
}
template <class OS>
void write(OS &out) const
{
if (id_==-1) out << "N";
else out << id_;
}
void print() const
{
write(std::cout);
}
//! Convert to a string
std::string string() const
{
std::ostringstream os;
write(os);
return os.str();
}
template <class OS>
void write(OS &out) const
{
if (id_==-1) out << "N";
else out << id_;
}
void print() const
{
write(std::cout);
}
//! Convert to a string
std::string string() const
{
std::ostringstream os;
write(os);
return os.str();
}
};
template <class A_type>
std::ostream& operator<<(std::ostream &out, const Label<A_type> &label)
{
out << "(";
label.write(out);
out << ")";
return out;
out << "(";
label.write(out);
out << ")";
return out;
}