7 Strings

7.1 String

The String class provided the same functionality of the C++ string except for fewer constructors. It also inherits OStream so that you can write to it with the << operator. It is defined in string.hpp.

7.2 ParmString

ParmString is a special string class that is designed to be used as a parameter for a function that is expecting a string. It is defined in parm_string.hpp. It will allow either a const char * or String class to be passed in. It will automatically convert to a const char *. The string can also be accessed via the str method. Usage example:

void foo(ParmString s1, ParmString s2) {
   const char * str0 = s1;
   unsigned int size0 = s2.size()
   if (s1 == s2 || s2 == "bar") {
     ...
   }
}
...
String s1 = "...";
foo(s1);
const char * s2 = "...";
foo(s2);

This class should be used when a string is being passed in as a parameter. It is faster than using const String & (as that will create an unnecessary temporary when a const char * is passed in), and is less annoying than using const char * (as it doesn’t require the c_str() method to be used when a String is passed in).

7.3 CharVector

A character vector is basically a Vector<char> but it has a few additional methods for dealing with strings which Vector does not provide. It, like String, is also inherits OStream so that you can write to it with the << operator. It is defined in char_vector.hpp. Use it when ever you need a string which is guaranteed to be in a continuous block of memory which you can write to.