On Wed, 24 Oct 2007 19:03:12 -0600, Eric Blake wrote: >> Personally I agree with you that it's more convenient when isfinite >> does not raise an exception. But the bottom line is that portable >> code can't assume that isfinite(sNaN) will return 0 without raising an >> exception. >> > >I guess it boils down to a question of whether we need to make the text >for all of the real-floating macros in <math.h> stronger in stating that >signalling NaNs will not raise any exception when processed by the macros.
The latest document to address Signaling NaNs in C99 is: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1011.htm First off, in Standard C, there is no way to create or get a Signaling NaN. Second off, the best that I could get the C committee to agree to on the subject is full of 'should' and 'might', instead of 'shall' and 'shall not'. --- Fred J. Tydeman Tydeman Consulting [EMAIL PROTECTED] Testing, numerics, programming +1 (775) 358-9748 Vice-chair of J11 (ANSI "C") Sample C99+FPCE tests: http://www.tybor.com Savers sleep well, investors eat well, spenders work forever.
