I have a piece of code pretty similar to this:
class someclass
{
public:
enum Section{START,MID,END};
vector<Section> Full;
void ex(){
for(int i=0;i<Full.size();i++)
{
switch (Full[i])
{
case START :
cout<<"S";
break;
case MID :
cout<<"M";
break;
case END:
cout<<"E";
break;
}
}
}
};
Now imagine I have much more enum types and their names are longer.... well what i get is not a very good looking code and i was wondering if it possible to bind a specific char to an enum type and maybe do something like this:
for(int i=0;i<Full.size();i++)
{
cout<(Full[i]).MyChar();
}
Or any other method that could make this code "prettier". Is this possible?
First of all, YES, we can assign an Enum to something else, a char !
You can create Enum from String by using Enum. valueOf() method. valueOf() is a static method that is added on every Enum class during compile-time and it's implicitly available to all Enum along with values(), name(), and cardinal() methods.
You can assign different values to enum member. A change in the default value of an enum member will automatically assign incremental values to the other members sequentially.
To convert an enum to int , we can: Typecast the enum value to int . Use the ToInt32 method of the Convert class.
Unfortunately there is not much you can do to clean this up. If you have access to the C++11 strongly typed enumerator feature, then you could do something like the following:
enum class Section : char {
START = 'S',
MID = 'M',
END = 'E',
};
And then you could do something like:
std::cout << static_cast<char>(Full[i]) << std::endl;
However, if you do not have access to this feature then there's not much you can do, my advice would be to have either a global map std::map<Section, char>
, which relates each enum
section to a character, or a helper function with the prototype:
inline char SectionToChar( Section section );
Which just implements the switch()
statement in a more accessible way, e.g:
inline char SectionToChar( Section section ) {
switch( section )
{
default:
{
throw std::invalid_argument( "Invalid Section value" );
break;
}
case START:
{
return 'S';
break;
}
case MID:
{
return 'M';
break;
}
case END:
{
return 'E';
break;
}
}
}
In a situation like this you could be tricky and cast your chars.
enum Section{
START = (int)'S',
MID = (int)'M',
END = (int)'E'
};
...
inline char getChar(Section section)
{
return (char)section;
}
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