Problem with a substitution

Problem with a substitution

[Sebastian Gniazdowski]

Hello,
I think that the parsing of command line can be performed by 1-2
substitutions. Below is the one that I'm currently working on:

${(j::)${@[@]//(#b)(--quiet|-q|--force|-f)[[:blank:]=]#(([a-zA-Z-]#)~(--quiet|-q|--force|-f))#/${TARGET[${match[1]}]::=${match[1]}//${${match[2]:+${match[2]}}:-1}
}}}

Explanation:


${(j::)${@[@]//
# Work on the command line arguments – substitute sub-strings (i.e.
the "//" substitution)

(#b)(--quiet|-q|--force|-f)
# Enable $match array (the #b); match 4 different option cases

[[:blank:]=]#
# Optional before-option's-value space and =

(([a-zA-Z-]#)~(--quiet|-q|--force|-f))#
# Optional value – a string from letters and dashes, but not any of
the 4 option-names

/
# Substitute to:

${TARGET[${match[1]}]::=${match[1]}
# option name, also assigning it to the TARGET hash (the ::=)

//${${match[2]:+${match[2]}}:-1} }}}
# After-//, also assign optional option's value (using "1" if there's no value)

So, for the following input:
set -- --quiet -fa -q
local -A TARGET

the output of:
print -r -- ${(j::)${@[@]//(#b)(--quiet|-q|--force|-f)[[:blank:]=]#(([a-zA-Z-]#)~(-q|--force|-f))#/${TARGET[${match[1]}]::=${match[1]}//${${match[2]:+${match[2]}}:-1}
}}}

is:
--quiet//1 -f//1 -q//1

and for:
print -rl -- ${(kv)TARGET}

it is (keys and values alternating):
-q
-q//1
--quiet
--quiet//1
-f
-f//1

I.e.: there's no "-f//a" string in it. Why?

--
Sebastian Gniazdowski
News: https://twitter.com/ZdharmaI
IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
Blog: http://zdharma.org

Re: Problem with a substitution

[Sebastian Gniazdowski]

It turned out that it was `#'-repeat-0-or-more the cause, changing it
to `##'-repeat-1-or-more solved the problem. It's the [a-zA-Z-]## in
the part below:

...[[:blank:]=]#(([a-zA-Z-]##)~(-q|--force|-f))#...

I wonder why such effect?

On Sun, 17 Mar 2019 at 03:55, Sebastian Gniazdowski
<sgniazdowski@gmail.com> wrote:
>
> Hello,
> I think that the parsing of command line can be performed by 1-2
> substitutions. Below is the one that I'm currently working on:
>
> ${(j::)${@[@]//(#b)(--quiet|-q|--force|-f)[[:blank:]=]#(([a-zA-Z-]#)~(--quiet|-q|--force|-f))#/${TARGET[${match[1]}]::=${match[1]}//${${match[2]:+${match[2]}}:-1}
> }}}
>
> Explanation:
>
>
> ${(j::)${@[@]//
> # Work on the command line arguments – substitute sub-strings (i.e.
> the "//" substitution)
>
> (#b)(--quiet|-q|--force|-f)
> # Enable $match array (the #b); match 4 different option cases
>
> [[:blank:]=]#
> # Optional before-option's-value space and =
>
> (([a-zA-Z-]#)~(--quiet|-q|--force|-f))#
> # Optional value – a string from letters and dashes, but not any of
> the 4 option-names
>
> /
> # Substitute to:
>
> ${TARGET[${match[1]}]::=${match[1]}
> # option name, also assigning it to the TARGET hash (the ::=)
>
> //${${match[2]:+${match[2]}}:-1} }}}
> # After-//, also assign optional option's value (using "1" if there's no value)
>
> So, for the following input:
> set -- --quiet -fa -q
> local -A TARGET
>
> the output of:
> print -r -- ${(j::)${@[@]//(#b)(--quiet|-q|--force|-f)[[:blank:]=]#(([a-zA-Z-]#)~(-q|--force|-f))#/${TARGET[${match[1]}]::=${match[1]}//${${match[2]:+${match[2]}}:-1}
> }}}
>
> is:
> --quiet//1 -f//1 -q//1
>
> and for:
> print -rl -- ${(kv)TARGET}
>
> it is (keys and values alternating):
> -q
> -q//1
> --quiet
> --quiet//1
> -f
> -f//1
>
> I.e.: there's no "-f//a" string in it. Why?
>
> --
> Sebastian Gniazdowski
> News: https://twitter.com/ZdharmaI
> IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
> Blog: http://zdharma.org



-- 
Sebastian Gniazdowski
News: https://twitter.com/ZdharmaI
IRC: https://kiwiirc.com/client/chat.freenode.net:+6697/#zplugin
Blog: http://zdharma.org