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From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.std.c
Subject: Re: Error handling requirements of inlining code.
Keywords: Error handling, Inlining, Optimization
Message-ID: <10834@smoke.BRL.MIL>
Date: 28 Aug 89 04:54:17 GMT
References: <20708@sequent.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 14

In article <20708@sequent.UUCP> paulr@sequent.UUCP (Paul Reger) writes:
-For example, say the code:
-#include <math.h>
-    double x;
-    x = sqrt(-1.0);
-is given the compiler, and it decides to inline sqrt().  Would the
-standard require the compiler to also provide error handling of sqrt()
-according to the standard library ???

The in-line code doesn't have to agree with the library, but it does
have to conform to the Standard.  On a domain error (as in your example),
EDOM must be stored in errno, and the function returns an implementation-
defined value (which may be a NaN, for example).  An exception must not
be raised.