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
next 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
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