HP Integrity NonStop H-Series - Manual (Page 242)

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©Copyright 1996 Rogue Wave Software
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.