Is there a way to make new variables to be scoped locally by default in zsh? - Stack Overflow

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Is there a way to make new variables to be scoped locally by default in zsh?

I was thinking something like this:

setopt magic_local_opt;

x=1
function foo {
  x=2
}

echo $x

and then end goal would be to print '1'

Is there a way to make new variables to be scoped locally by default in zsh?

I was thinking something like this:

setopt magic_local_opt;

x=1
function foo {
  x=2
}

echo $x

and then end goal would be to print '1'

• zsh

Share Improve this question Follow edited Mar 18 at 16:31 Martin 37411 gold badge55 silver badges1717 bronze badges asked Mar 18 at 16:24 Jan MatejkaJan Matejka 1,99011 gold badge1515 silver badges3333 bronze badges

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2 Answers 2

Sorted by: Reset to default 1

use this:

function foo {
  typeset x=2  # Makes x local to the function
}

x=1
foo
echo $x  # This will print 1

Not by default. You would at least have to write something like

local x=2

Since it is easy to fet this and unwillingly create a global variable, you can put at least in your script at

setopt warn_create_global

This would at least produce an error message, if you create a new variable without explicitly declaring it as local or global. It would not help in your concrete example, because x has already a value

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