zsh-users
 help / color / mirror / code / Atom feed
From: Sebastian Gniazdowski <sgniazdowski@gmail.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Problem with a substitution
Date: Sun, 17 Mar 2019 03:55:27 +0100	[thread overview]
Message-ID: <CAKc7PVDxXnkFaC9oSUCm-59tYpofA3HwiY09XewfBvGruGY8Eg@mail.gmail.com> (raw)

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

             reply	other threads:[~2019-03-17  2:56 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-17  2:55 Sebastian Gniazdowski [this message]
2019-03-17  3:33 ` Sebastian Gniazdowski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAKc7PVDxXnkFaC9oSUCm-59tYpofA3HwiY09XewfBvGruGY8Eg@mail.gmail.com \
    --to=sgniazdowski@gmail.com \
    --cc=zsh-users@zsh.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.vuxu.org/mirror/zsh/

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).