Marko Rauhamaa wrote:
Grant Edwards <grant.b.edwa...@gmail.com>:
I like [const qualifiers] in C because it allows the linker to place
them in ROM with the code. It also _sometimes_ provides useful
diagnostics when you pass a pointer to something which shouldn't be
modified to something that is going to try to modify it.
Unfortunately, "const" is so tacky in practice that the language and the
standard libraries have rendered it useless.
One example is the surprising fact that string literals in C are "char
*" and not "const char *".
If not, you couldn't pass a string literal to a function having prototype
void f(char *s);
Of course, if f tries to modify *s, there will be a run time error as
character string literals are stored in a "special place", and are not
mutable. This improves performance.
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