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Date: Sun, 2 Jun 2013 09:33:36 +0200
From: Tom Wijsman <TomWij@gentoo.org>
To: gentoo-dev@lists.gentoo.org
Subject: Re: [gentoo-dev] evar_push/pop helpers
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On Sun, 2 Jun 2013 03:09:31 -0400
Mike Frysinger <vapier@gentoo.org> wrote:

> there's no way to undo the local thus it affects the rest of the
> func.  this makes sure the change is actually localized to where it
> is needed. -mike

In other languages you can freely introduce local scopes { ... }, this
isn't possible in Bash since a local corresponds to a function; but
it's not really that hard to replicate, now consider this instead:

	test()
	{
		local test=3D"FUNCTION"
		echo ${test}

		x(){
			local test=3D"LOCAL SCOPE 1"
			echo ${test}
		};x

		echo ${test}

		x(){
			local test=3D"LOCAL SCOPE 2"
			echo ${test}
		};x
	=09
		echo ${test}
	}

	test

Now 'x' is vague, you could replace 'x' by a name documenting the scope.

I consider this to be more clean than using a variable to remember it,
especially when multiple local scopes are to be used after each other.

--=20
With kind regards,

Tom Wijsman (TomWij)
Gentoo Developer

E-mail address  : TomWij@gentoo.org
GPG Public Key  : 6D34E57D
GPG Fingerprint : C165 AF18 AB4C 400B C3D2  ABF0 95B2 1FCD 6D34 E57D

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