mirror of
https://github.com/fish-shell/fish-shell
synced 2024-09-21 06:51:58 +00:00
af61ea1325
We are using only :: in a synopsis for fishscript examples given of the command being documented.
51 lines
1.3 KiB
ReStructuredText
51 lines
1.3 KiB
ReStructuredText
.. _cmd-begin:
|
|
|
|
begin - start a new block of code
|
|
=================================
|
|
|
|
Synopsis
|
|
--------
|
|
|
|
**begin**; [*COMMANDS* ...]; **end**
|
|
|
|
Description
|
|
-----------
|
|
|
|
``begin`` is used to create a new block of code.
|
|
|
|
A block allows the introduction of a new variable scope, redirection of the input or output of a set of commands as a group, or to specify precedence when using the conditional commands like ``and``.
|
|
|
|
The block is unconditionally executed. ``begin; ...; end`` is equivalent to ``if true; ...; end``.
|
|
|
|
``begin`` does not change the current exit status itself. After the block has completed, ``$status`` will be set to the status returned by the most recent command.
|
|
|
|
Example
|
|
-------
|
|
|
|
The following code sets a number of variables inside of a block scope. Since the variables are set inside the block and have local scope, they will be automatically deleted when the block ends.
|
|
|
|
::
|
|
|
|
begin
|
|
set -l PIRATE Yarrr
|
|
|
|
...
|
|
end
|
|
|
|
echo $PIRATE
|
|
# This will not output anything, since the PIRATE variable
|
|
# went out of scope at the end of the block
|
|
|
|
|
|
In the following code, all output is redirected to the file out.html.
|
|
|
|
::
|
|
|
|
begin
|
|
echo $xml_header
|
|
echo $html_header
|
|
if test -e $file
|
|
...
|
|
end
|
|
...
|
|
end > out.html
|