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Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordi
From: |
Wim Lewis |
Subject: |
Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective? |
Date: |
Mon, 29 Aug 2011 12:15:21 -0700 (PDT) |
On Mon, 29 Aug 2011, Weddington, Eric wrote:
For the preprocessor purposes, I would bet that somehow "last" evaluates
to 0, so of course the condition will always be true.
Yes, I think this is part of the language standard (for better or worse).
I don't have a standard cite but it's described in the GNU docs:
http://gcc.gnu.org/onlinedocs/gcc-3.0.1/cpp_4.html#SEC38
"[6] Identifiers that are not macros, which are all considered to be
the number zero. [....]"
- [avr-gcc-list] Can enumerator values be used in a #if preprocessor directive?, Bob Paddock, 2011/08/29
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, Weddington, Eric, 2011/08/29
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?,
Wim Lewis <=
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, Bob Paddock, 2011/08/29
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, Dave Hansen, 2011/08/29
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, David Brown, 2011/08/30
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, Bob Paddock, 2011/08/30
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, David Brown, 2011/08/30
- Re: [avr-gcc-list] Can enumerator values be used in a #if preprocessordirective?, Bob Paddock, 2011/08/30