[dfawcus]

Attribute (qualifier), or storage class?

https://www.airs.com/blog/archives/428

The use of 'const' in C is very much a mixed blessing; I certainly have experience of the 'const poisoning' issue. Possibly it would have been better as a storage class.

For bool, yes it was a useful addition. Especially for the cases where old code would have something like:

    #define FLAG_A 1u
    #define FLAG_B 2u
    int has_flag_B (something *some) { return some->field & FLAG_B; }

and that was then combined with logic expecting 'true' to be 1; which could sneak in over time.