lint warnings from `bison -y' generated files

[Nicolas Joly]

Hi,

As a software developper, i often use lint(1) on my NetBSD workstation
to check my C source code for potential problems. One of my project
use multiple parsers and lexers to detect and parse biological
sequence formats.

While running lint on all .c files, i noticed that bison generated
files exhibit some lint warnings:

./align/clustaly.c:
align/clustaly.c(842): warning: expression has null effect [129]
align/clustaly.c(1023): warning: constant in conditional context [161]
align/clustaly.c(1023): warning: constant in conditional context [161]
align/clustaly.c(1024): warning: constant in conditional context [161]
align/clustaly.c(1024): warning: constant in conditional context [161]
align/clustaly.c(1358): warning: constant in conditional context [161]

I tracked them to various constructs:

- (void)yyvaluep;         ... line 842.
- do {} while (0)         ... lines 1023/1024.
- if (0) {}               ... line 1358.

Except for the fisrt one, it should be easy to fix them by adding a
`/*CONSTCOND*/' lint directive.

As the code is not really under the developper control, i think that
most lint warnings should be avoided; like we try to do for compilers.

Thanks in advance,
Regards.

-- 
Nicolas Joly

Biological Software and Databanks.
Institut Pasteur, Paris.