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Re: [Help-bash] regex for allowed names of bash variables
From: |
Greg Wooledge |
Subject: |
Re: [Help-bash] regex for allowed names of bash variables |
Date: |
Thu, 31 Dec 2015 07:44:09 -0500 |
User-agent: |
Mutt/1.4.2.3i |
On Wed, Dec 30, 2015 at 10:26:24PM -0600, Peng Yu wrote:
> Hi, I want to know the exact definition of allowed as bash variable
> names. Could anybody know the regex for it?
DEFINITIONS
...
name A word consisting only of alphanumeric characters and
underscores, and beginning with an alphabetic character or an
underscore. Also referred to as an identifier.
PARAMETERS
A parameter is an entity that stores values. It can be a name, a
number, or one of the special characters listed below under Special
Parameters. A variable is a parameter denoted by a name.