On 21/08/2020 07:24, Christian Schoenebeck wrote:
On Freitag, 21. August 2020 02:04:52 CEST Barry Jackson wrote:
Hello,
Quick question:
https://svn.linuxsampler.org/cgi-bin/viewvc.cgi/linuxsampler/trunk/src/netwo
rk/lscp.y?r1=3054&r2=3787&pathrev=3787
I am not a programmer but I do maintain the Linuxsampler package for Mageia.
To me the above code looks as though there may be a typo in it?
Is the space after # on line 1486 correct?
It is correct, both in C as well as in C++. A preprocessor statement must
start with a '#' character at the start of the line, but it is not mandatory
for the actual preprocessor statement to follow that '#' character
immediately.
Space indents like this one are commonly used to clearly structure nested
preprocessor statement blocks, i.e.
#if foo
# if bla
# define something 0
# else
# define something 1
# endif
#else
# if bla
# define something 2
# else
# define something 3
# endif
#endif
is better for the eye than:
#if foo
#if bla
#define something 0
#else
#define something 1
#endif
#else
#if bla
#define something 2
#else
#define something 3
#endif
#endif
This comes especially handy if somebody accidentally breaks the structure when
the software evolves. The indents allow to recover the structure easily.
CU
Christian
Thanks Christian for your quick reply, this is a case of 'a little
knowledge (on my part) is dangerous' :)
I am familiar with indentation in bash etc., but not preprocessor
statements in C.
Cheers,
Barry
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