Re: Use readonly wherever possible?

[Greg Wooledge]

On Wed, May 06, 2020 at 12:04:08PM -0300, Maroloccio wrote:
> or general thoughts on marking explicitly as "const" what is
> de-facto "const":
> 
> * https://isocpp.org/wiki/faq/const-correctness

You're bringing concepts from other languages into bash, and expecting
them to play out the same way in bash that they do in these other
languages.

Bash isn't like other languages.

unicorn:~$ readonly foo=bar
unicorn:~$ foo() { local foo="$1"; }
unicorn:~$ foo bar
bash: local: foo: readonly variable

The "readonly" flag is HEAVY.  It is not a thing you toss around as if
it only affects a single scope.