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added rule about not modifying return values when failing

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Andreas Gustafsson 2000-09-19 22:47:14 +00:00
parent 337ca18384
commit 4d7bd2d694
1 changed files with 6 additions and 1 deletions
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doc/dev/coding.html
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@ -15,7 +15,7 @@
- WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-->
<!-- $Id: coding.html,v 1.13 2000/08/01 01:18:21 tale Exp $ -->
<!-- $Id: coding.html,v 1.14 2000/09/19 22:47:14 gson Exp $ -->
<H2>C Language</H2>
@ -346,6 +346,11 @@ Bad (obviously for more than one reason ...):
A function should report success or failure, and do so accurately. It
should never fail silently. Use of Design by Contract can help here.<P>
When a function is designed to return results to the caller by
assigning to caller variables through pointer arguments, it should
perform the assignment only if it succeeds and leave the variables
unmodified if it fails.<P>
<H4>Testing Bits</H4>
Bit testing should be as follows:<P>
Good: