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31155: minor extra zcalc features and documentation

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Peter Stephenson 2013-03-17 20:52:55 +00:00
parent 136cc1e1b7
commit ab8fe84a8c
3 changed files with 24 additions and 6 deletions
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7
ChangeLog
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@ -1,3 +1,8 @@
2013-03-17 Peter Stephenson <p.w.stephenson@ntlworld.com>
* 31155: Doc/Zsh/contrib.yo, Functions/Misc/zcalc: minor
extra zcalc features and documentation.
2013-03-15 Peter Stephenson <p.w.stephenson@ntlworld.com>
* 31154: Doc/Zsh/contrib.yo, Functions/Misc/zcalc: make zcalc
@ -608,5 +613,5 @@
*****************************************************
* This is used by the shell to define $ZSH_PATCHLEVEL
* $Revision: 1.5822 $
* $Revision: 1.5823 $
*****************************************************

12
Doc/Zsh/contrib.yo
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@ -3144,12 +3144,14 @@ line preceded by `tt(4> )' is available as tt($4). The last value
calculated is available as tt(ans). Full command line editing, including
the history of previous calculations, is available; the history is saved in
the file tt(~/.zcalc_history). To exit, enter a blank line or type `tt(:q)'
on its own (`tt(q)' is allowed for historical compatibility). A
line ending with a single backslash is treated in the same fashion
on its own (`tt(q)' is allowed for historical compatibility).
A line ending with a single backslash is treated in the same fashion
as it is in command line editing: the backslash is removed, the
function prompts for more input (the prompt is preceded by `tt(...)'
to indicate this), and the lines are combined into one to get the final
result.
result. In addition, if the input so far contains more open than
close parentheses tt(zcalc) will prompt for more input.
If arguments are given to tt(zcalc) on start up, they are used to prime the
first few positional parameters. A visual indication of this is given when
@ -3219,11 +3221,13 @@ scope.
)
item(tt(:function) var(name) [ var(body) ])(
Define a mathematical function or (with no var(body)) delete it.
tt(:function) may be abbreviated to tt(:func) or simply tt(:f).
The var(name) may contain the same characters as a shell function name.
The function is defined using tt(zmathfuncdef), see below.
Note that tt(zcalc) takes care of all quoting. Hence for example:
example(function cube $1 * $1 * $1)
example(:f cube $1 * $1 * $1)
defines a function to cube the sole argument.
)

11
Functions/Misc/zcalc
View file

@ -166,6 +166,14 @@ while vared -cehp "${cont_prompt}${ZCALCPROMPT}" line; do
line="$prev_line$line"
prev_line=
cont_prompt=
# Test whether there are as many open as close
# parentheses in the line so far.
if [[ ${#line//[^\(]} -gt ${#line//[^\)]} ]]; then
prev_line+=$line
cont_prompt="..."
line=
continue
fi
[[ -z $line ]] && break
# special cases
# Set default base if `[#16]' or `[##16]' etc. on its own.
@ -178,6 +186,7 @@ while vared -cehp "${cont_prompt}${ZCALCPROMPT}" line; do
defbase=$match[1]
fi
print -s -- $line
print -- $(( ${defbase} ans ))
line=
continue
else
@ -233,7 +242,7 @@ while vared -cehp "${cont_prompt}${ZCALCPROMPT}" line; do
continue
;;
((:|)function[[:blank:]]##(#b)([^[:blank:]]##)(|[[:blank:]]##([^[:blank:]]*)))
((function|:f(unc(tion|)|))[[:blank:]]##(#b)([^[:blank:]]##)(|[[:blank:]]##([^[:blank:]]*)))
zmathfuncdef $match[1] $match[3]
line=
continue