Hirohito Higashi wrote:

> Title is as it is.
> 
> Merit:
> - Compiler optimizations will be a bit smarter.
> - Execution speed will be a bit faster.
> - Compiler us warn the code assignment wrong.
> 
> Demerit:
> - None. (maybe)
> 
> I made a patch for proposal.
> How about this?
> 
> When it's Okay, I'll continue with the remaining of the work.

In my experience using "const" does not really bring an advantage.
Changing the variable anyway would already cause a problem.
There is some inconvenience when a called function doesn't have "const",
it usually causes a ripple effect of changes.  I can't remember a
mistake where using "const" would have avoided the problem.

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