Standard Exceptions

The C++ 4.2 compiler used the names related to standard exceptions that appeared in the C++ draft standard at the time the compiler was prepared. The names in the C++ standard have changed since then. The C++ 5.0 compiler in standard mode uses the standard names, as shown in the following table.

Table 3-3 Exception-Related Type Names

Old name	Standard name	Description
xmsg	exception	Base class for standard exceptions
xalloc	bad_alloc	Thrown by failed allocation request
terminate_function	terminate_handler	Type of a terminate handler function
unexpected_function	unexpected_handler	Type of an unexpected-exception handler function

The public members of the classes (xmsg vs. exception, and xalloc vs. bad_alloc) are different, as is the way you use the classes.