\section functions functions - print or erase functions

\subsection functions-synopsis Synopsis
\fish{synopsis}
functions [ -a | --all ] [ -n | --names ]
functions [ -D | --details ] [ -v ] FUNCTION
functions -c OLDNAME NEWNAME
functions -d DESCRIPTION FUNCTION
functions [ -e | -q ] FUNCTIONS...
\endfish

\subsection functions-description Description

`functions` prints or erases functions.

The following options are available:

- `-a` or `--all` lists all functions, even those whose name starts with an underscore.

- `-c OLDNAME NEWNAME` or `--copy OLDNAME NEWNAME` creates a new function named NEWNAME, using the definition of the OLDNAME function.

- `-d DESCRIPTION` or `--description=DESCRIPTION` changes the description of this function.

- `-e` or `--erase` causes the specified functions to be erased.

- `-D` or `--details` reports the path name where each function is defined or could be autoloaded, `stdin` if the function was defined interactively or on the command line or by reading stdin, and `n/a` if the function isn't available. If the `--verbose` option is also specified then five lines are written:

    -# the pathname as already described,
    -# `autoloaded`, `not-autoloaded` or `n/a`,
    -# the line number within the file or zero if not applicable,
    -# `scope-shadowing` if the function shadows the vars in the calling function (the normal case if it wasn't defined with `--no-scope-shadowing`), else `no-scope-shadowing`, or `n/a` if the function isn't defined,
    -# the function description minimally escaped so it is a single line or `n/a` if the function isn't defined.

You should not assume that only five lines will be written since we may add additional information to the output in the future.

- `-n` or `--names` lists the names of all defined functions.

- `-q` or `--query` tests if the specified functions exist.

- `-v` or `--verbose` will make some output more verbose.

The default behavior of `functions`, when called with no arguments, is to print the names of all defined functions. Unless the `-a` option is given, no functions starting with underscores are not included in the output.

If any non-option parameters are given, the definition of the specified functions are printed.

Automatically loaded functions cannot be removed using `functions -e`. Either remove the definition file or change the $fish_function_path variable to remove autoloaded functions.

Copying a function using `-c` copies only the body of the function, and does not attach any event notifications from the original function.

Only one function's description can be changed in a single invocation of `functions -d`.

The exit status of `functions` is the number of functions specified in the argument list that do not exist, which can be used in concert with the `-q` option.


\subsection functions-example Examples
\fish
functions -n
# Displays a list of currently-defined functions

functions -c foo bar
# Copies the 'foo' function to a new function called 'bar'

functions -e bar
# Erases the function `bar`
\endfish
