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Full Discussion: enum and C preprocessor
Top Forums Programming enum and C preprocessor Post 302556295 by agama on Saturday 17th of September 2011 08:18:19 PM
Old 09-17-2011
Short answer: yes, you'll need to use some tricks with #define to do what you want; values set in an enum aren't recognised by the preprocessor.

An enum is interpreted by the compiler and not the preprocessor. The statement is ignored by the preprocessor and thus something like PIN_A is not any more meaningful, as far as the preprocessor is concerned, in the later code than j would be from a statement like:

Code:
int j = 23;

 

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LEARN ABOUT DEBIAN

uthash-dev

UTHASH-DEV(3)						      uthash-dev User Manual						     UTHASH-DEV(3)

NAME

       uthash-dev - Hash map and linked list implementation

SYNOPSIS

       #include <uthash.h>

       #include <utlist.h>

       #include <utarray.h>

       #include <utstring.h>

DESCRIPTION

       The uthash-dev Debian package build from the uthash source package contains the uthash, utlist, utharray, and utstring headers. They can be
       included in any C source code and provide a hash map, linked list, etc implementations as C preprocessor macros.

       The documentation is available in the documentation directory of the package (/usr/share/doc/uthash-dev/) in HTML and PDF format.
       Additionally, some examples are also included that have been provided as test cases in the upstream release.

FILES

       /usr/include/uthash.h
	   The hash map implementation as C preprocessor macro.

       /usr/include/utlist.h
	   The linked list implementation as C preprocessor macro.

       /usr/include/utarray.h
	   The dynamic array implementation as C preprocessor macro.

       /usr/include/utstring.h
	   The dynamic string implementation as C preprocessor macro.

AUTHOR

       Bastian Blywis <blywis@zedat.fu-berlin.de>
	   Wrote this manpage for the Debian system.

COPYRIGHT

       Copyright (C) 2009 Bastian Blywis

       This manual page was written for the Debian system (and may be used by others).

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 3 or (at
       your option) any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.

uthash-dev							    03/11/2012							     UTHASH-DEV(3)
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