Remember the annoying warnings that you feel helpless about? Well you shouldn’t
because C++-11 introduced Attributes which are indicators to the compiler to
either disable a warning or to flag a warning.
C++-17 introduced three main Attributes which are helpful.
[[nodiscard]]
As the name suggests, by annotating the code with [[nodiscard]] you are
telling the compiler that the values returned should not be discarded. This is
usefull when ignoring the returned value can cause errors in the program.
[[maybe_unused]]
In many cases, some of the variables or values allocated may not be used. Example for this are function parameters that are not used, or data members of a structure or a Class that are not used.
[[fallthrough]]
You have a switch statement and certain cases may not have an explicit
break statement. In such cases, the compiler usually throws a warning. To
avoid these warnings we should explicitly add [[fallthrough]] statements.
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