POSIX-Compliant Way to Scope Variables to a Function in a Shell Script

Question

Is there a POSIX Compliant way to limit the scope of a variable to the function it is declared in? i.e.:

Testing()
{
    TEST=\"testing\"
}

Testing
echo \"T         


        

Answer 1

Dude. You guys are going crazy with all this! This is built into the design of POSIX functions declarations.

If you would like a variable declared in the parent scope, to be accessible in a function, but leave its value in the parent scope unchanged, simply:

Declare your function using an explicit subshell, i.e., use a

• subshell_function_declaration() ( with=parentheses ), not

• inlined_function_declarations() { with=braces ;}

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Which is the same behavior of inline grouping vs. subshell grouping, throughout the entire language. BTW.

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{ [ $that = $is ] && how=grouping_works || ! $SHELL ;} || (exit 1), y'know?