Fundamental Data Types

The standard library describes a specific type by providing a specialized implementation of the numeric_limits class for the type. Static functions and static constant data members then provide information specific to the type. The standard library includes descriptions of the following fundamental data types.

`bool`	`char`	`int`	`float`
	`signed char`	`short`	`double`
	`unsigned char`	`long`	`long double`
	`wchar_t`	`unsigned short`
		`unsigned int`
		`unsigned long`

Certain implementations may also provide information on other data types. Whether or not an implementation is described can be discovered using the static data member field is_specialized. For example, the following is legal, and will indicate that the string data type is not described by this mechanism.

cout << "are strings described " <<
    numeric_limits<string>::is_specialized << endl;

For data types that do not have a specialization, the values yielded by the functions and data fields in numeric_limits are generally zero or false.