Enum Command

pub enum Command {
    Simple(Vec<Assignment>, Vec<Word>, Vec<Redirect>),
    Compound(Vec<Command>),
    Not(Box<Command>),
    And(Box<Command>, Box<Command>),
    Or(Box<Command>, Box<Command>),
    Subshell(Box<Program>),
    Pipeline(Box<Command>, Box<Command>),
    Background(Box<Command>),
    Lang(Interpreter, String),
}

A command is a highly mutually-recursive node with the main features of the POSIX language.

Variants

Simple(Vec<Assignment>, Vec<Word>, Vec<Redirect>)

Just a single command, with it’s arguments.

Examples

date --iso-8601

Compound(Vec<Command>)

A full program embedded in a compound command.

{ ls ; }

Not(Box<Command>)

Performs boolean negation to the status code of the inner command.

Examples

! grep 'password' data.txt

And(Box<Command>, Box<Command>)

Perform the first command, conditionally running the next upon success.

Examples

mkdir tmp && cd tmp

Or(Box<Command>, Box<Command>)

Perform the first command, conditionally running the next upon failure.

Examples

kill $1 || kill -9 $1

Subshell(Box<Program>)

Run the inner program in a sub-shell environment.

Examples

DATE=(date)

Pipeline(Box<Command>, Box<Command>)

Run a command’s output through to the input of another.

Examples

cat $1 | wc -l

Background(Box<Command>)

Run a command in the background.

Examples

while true; do
  sleep 1; echo "ping";
done &

Lang(Interpreter, String)

Run a program through another parser/interpreter.

Examples

{#ruby puts (Math.sqrt(32**2/57.2))}

Compatibility

This is non-POSIX

TODO: How bad is it?

Implementations

impl Command

pub fn push(self, command: &Command) -> Self

pub fn insert(self, command: &Command) -> Self

Trait Implementations

impl Clone for Command

fn clone(&self) -> Command

Returns a duplicate of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Command for Command

fn name(&self) -> CString

Return the name of this command.

impl Debug for Command

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Run for Command

fn run(&self, runtime: &mut Runtime<'_>) -> Result<WaitStatus>