"bearophile" <bearophileh...@lycos.com> wrote in message news:i4luk9$2rd...@digitalmars.com... >A small Reddit thread regarding if unused variables and imports are better >as errors or warnings: > http://www.reddit.com/r/programming/comments/d3emo > > In my opinion in this case errors are too much, warning are enough. > > Few situations for those warnings: > - warning for unused variables (as GC, C# and other compilers do); > - warning when a variable get used in some ways, and then its last > assignment gets unused (done by a kind of C compiler); > - unused imports (useful to keep code clean and remove unnecessary module > dependences); > - unused functions (but this is harder to do in a clean way in a language > that has templates, so this may be omitted). > > Among those four warnings the most useful are the first two ones. In C > once the unused variable warning of GCC has found at compile time a bug in > my code (I did forget to increment that variable in the loop). So I have > loved this warning ever since. >
An error would be an enormous pain in the ass. A warning might be helpful in some cases.
