Is there any real reason to use "const"?

rempas rempas at
Mon Jan 24 16:27:35 UTC 2022

On Monday, 24 January 2022 at 14:40:33 UTC, Steven Schveighoffer 
> On 1/24/22 5:06 AM, rempas wrote:
>> Rather than just tell the compiler to not allow me to modify a 
>> variable (like I don't know what I'm doing with my program), 
>> are there any reason to use "const" variables?
> If you want the compiler to help you prevent mistakes, yes. If 
> you don't, then no.
> Other than that, if you want to write a library and have it 
> most accessible to others that may prefer to use const, you 
> should use const, as it will allow the most usage.
>> Other than out of curiosity, I'm actually asking because I'm 
>> writing a transpiler and I want to know if I should support 
>> "const" (or the concept of immutability in general) or not.
> immutable/const is purely a compile-time concept. It's not 
> reflected in the final binary, so it's not necessary to forward 
> the attributes to a language that doesn't support it.
> Same thing with types (see for instance, TypeScript compiled to 
> JavaScript).
> -Steve

Thanks for your time! My question is if you think that it will be 
very very bad to not include it in my language or not. I'm slowly 
changing my mind after seeing all these comments and thinking 
about including it tho...

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