LGTM.com - false positive: constant-comparison with assignment on one side
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false-positive
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I have
int next_char;
...
(next_char = gzgetc(file_)) != -1
where gzgetc is from zlib:
ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
It triggers constant-comparison rule with message:
> Comparison is always true because ... = ... >= 0.
In this case (a = b) is integer assignment and can be negative.
https://lgtm.com/projects/g/project-gemmi/gemmi/snapshot/d1a210cf4810719b905806a690feade01e6eb5c9/files/include/gemmi/gz.hpp?sort=name&dir=ASC&mode=heatmap#x4ec8a4d86c53b859:1
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