10.1 Introduction

Blitz++ provides a set of functions to access numeric properties of intrinsic types. They are provided as an alternative to the somewhat klunky numeric_limits<T>::yadda_yadda syntax provided by the ISO/ANSI C++ standard. Where a similar Fortran 90 function exists, the same name has been used.

The argument in all cases is a dummy of the appropriate type.

All functions described in this section assume that numeric_limits<T> has been specialized for the appropriate case. If not, the results are not useful. The standard requires that numeric_limits<T> be specialized for all the intrinsic numeric types (float, double, int, bool, unsigned int, etc.).

To use these functions, you must first include the header <blitz/numinquire.h>. Also, note that these functions may be unavailable if your compiler is non-ANSI compliant. If the preprocessor symbol BZ_HAVE_NUMERIC_LIMITS is false, then these functions are unavailable.