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Side-Effectful Expressions in C (2023)

https://blog.xoria.org/expr-stmt-c/
17•surprisetalk•5d ago

Comments

andrewla•29m ago
Really this is mainly about the ++ and -- operators. I think Go made the right call here and allows these only as statements, not as expressions. I will basically never use these in code I write and will remove it from code I maintain or review; the only value add is compactness which is very rarely a goal.

The other side effect expression here is the equals operator; once again, this should not be an expression but should just be a statement. Once again this is used (intentionally) mainly for compactness and unintentionally used to create messy bugs. I do find the "yoda" style checks to be aesthetically unpleasing so I'm party of the problem here.

Maybe it's time to add `-Wno-crement-expressions` and `-Wno-assignment-expressions`. `-Wparentheses` gets you part of the way to the second but even the legitimate uses are ugly to my eye.