fish-shell/sphinx_doc_src/cmds/eval.rst

.. _cmd-eval:

eval - evaluate the specified commands
======================================

Synopsis
--------

eval [COMMANDS...]


Description
-----------
``eval`` evaluates the specified parameters as a command. If more than one parameter is specified, all parameters will be joined using a space character as a separator.

If your command does not need access to stdin, consider using ``source`` instead.

If no piping or other compound shell constructs are required, variable-expansion-as-command, as in  ``set cmd ls; $cmd``, is also an option.


Example
-------

The following code will call the ls command and truncate each filename to the first 12 characters.

::

    set cmd ls \| cut -c 1-12
    eval $cmd
docs: Add labels to all commands This allows us to use :ref: references, which don't require hardcoding it as html [ci skip] 2019-03-31 17:05:09 +08:00			`.. _cmd-eval:`

Switch command docs from \section to reStructuredText 2018-12-17 09:39:33 +08:00			`eval - evaluate the specified commands`
Fix command section separator line lengths 2019-01-03 12:10:47 +08:00			`======================================`
Switch command docs from \section to reStructuredText 2018-12-17 09:39:33 +08:00
Migrate the 'synopsis' sections to .rst format 2018-12-18 09:58:24 +08:00			`Synopsis`
			`--------`
Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00
			`eval [COMMANDS...]`
Migrate the 'synopsis' sections to .rst format 2018-12-18 09:58:24 +08:00
Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00
Convert \\subsection sections into rst format 2018-12-19 10:44:30 +08:00			`Description`
Fix command section separator line lengths 2019-01-03 12:10:47 +08:00			`-----------`
Switch backticks to double backticks for rst compatibility 2018-12-20 04:02:45 +08:00			``eval`` evaluates the specified parameters as a command. If more than one parameter is specified, all parameters will be joined using a space character as a separator.
Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00
Switch backticks to double backticks for rst compatibility 2018-12-20 04:02:45 +08:00			If your command does not need access to stdin, consider using ``source`` instead.
Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00
Variables as commands are in fact supported, eval docs should not claim otherwise. (#5819) Provide an example that somewhat justifies eval's existence in light of this change. Also correct similar misinformation found in a comment. 2019-04-26 21:30:13 +08:00			If no piping or other compound shell constructs are required, variable-expansion-as-command, as in ``set cmd ls; $cmd``, is also an option.
Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00

Variables as commands are in fact supported, eval docs should not claim otherwise. (#5819) Provide an example that somewhat justifies eval's existence in light of this change. Also correct similar misinformation found in a comment. 2019-04-26 21:30:13 +08:00			`Example`
			`-------`
Switch \fish sections to rst format 2018-12-19 11:14:04 +08:00
Variables as commands are in fact supported, eval docs should not claim otherwise. (#5819) Provide an example that somewhat justifies eval's existence in light of this change. Also correct similar misinformation found in a comment. 2019-04-26 21:30:13 +08:00			`The following code will call the ls command and truncate each filename to the first 12 characters.`
Switch \fish sections to rst format 2018-12-19 11:14:04 +08:00
			`::`

Variables as commands are in fact supported, eval docs should not claim otherwise. (#5819) Provide an example that somewhat justifies eval's existence in light of this change. Also correct similar misinformation found in a comment. 2019-04-26 21:30:13 +08:00			`set cmd ls \\| cut -c 1-12`
Switch \fish sections to rst format 2018-12-19 11:14:04 +08:00			`eval $cmd`

Copy doc_src to sphinx_doc_src and add a TOC 2018-12-17 05:08:41 +08:00