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| Related articles |
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| [4 earlier articles] |
| Re: Overloaded logic operators arnold@skeeve.com (2008-11-25) |
| Re: Overloaded logic operators mike@mike-austin.com (Mike Austin) (2008-11-25) |
| Re: Overloaded logic operators mike@mike-austin.com (Mike Austin) (2008-11-25) |
| Re: Overloaded logic operators mike@mike-austin.com (Mike Austin) (2008-11-25) |
| Re: Overloaded logic operators lkrupp@pssw.com (Louis Krupp) (2008-11-25) |
| Re: Overloaded logic operators mailbox@dmitry-kazakov.de (Dmitry A. Kazakov) (2008-11-25) |
| Re: Overloaded logic operators m.helvensteijn@gmail.com (2008-11-25) |
| Re: Overloaded logic operators bc@freeuk.com (Bartc) (2008-11-25) |
| Re: Overloaded logic operators cdodd@acm.org (Chris Dodd) (2008-11-25) |
| Re: Overloaded logic operators torbenm@pc-003.diku.dk (2008-11-26) |
| Re: Overloaded logic operators fswarbrick@gmail.com (Frank Swarbrick) (2008-11-27) |
| Re: Overloaded logic operators dot@dotat.at (Tony Finch) (2008-12-01) |
| Re: Overloaded logic operators alexc@TheWorld.com (Alex Colvin) (2008-12-03) |
| [1 later articles] |
| From: | m.helvensteijn@gmail.com |
| Newsgroups: | comp.compilers |
| Date: | Tue, 25 Nov 2008 10:13:50 -0800 (PST) |
| Organization: | Compilers Central |
| References: | 08-11-110 08-11-116 |
| Keywords: | design |
| Posted-Date: | 25 Nov 2008 14:50:28 EST |
> (Being able to write if a<b<c is neat though and I've just added
> that to my language, with about 5 lines of code; it just converts to
> if (a<b) and (b<c).)
Yes, chained comparison is neat. But watch out. If someone wrote: (a <
b() < c), he would expect b() to only be evaluated once, not twice.
This makes a big difference if b() has side-effects. Also, the syntax
can be extended to mixed comparison operators. For example: (a < b = c
< d).
Did you catch all that in 5 lines of code? Then I admire your code
modularity. :-)
--
Michiel
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