__isnanl

Name

__isnanl -- test for infinity

Synopsis

int __isnanl(long double arg);

Description

__isnanl() has the same specification as isnan() in POSIX 1003.1-2001 (ISO/IEC 9945-2003), except that the argument type for __isnanl() is known to be long double.

__isnanl() is not in the source standard; it is only in the binary standard.