Enum oursh::program::posix::ast::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

Just a single command, with it’s arguments.

Examples

date --iso-8601

Tuple Fields of Simple

0: Vec<Assignment>1: Vec<Word>2: Vec<Redirect>

Compound

A full program embedded in a compound command.

{ ls ; }

Tuple Fields of Compound

0: Vec<Command>

Not

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

Examples

! grep 'password' data.txt

Tuple Fields of Not

0: Box<Command>

And

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

Examples

mkdir tmp && cd tmp

Tuple Fields of And

0: Box<Command>1: Box<Command>

Or

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

Examples

kill $1 || kill -9 $1

Tuple Fields of Or

0: Box<Command>1: Box<Command>

Subshell

Run the inner program in a sub-shell environment.

Examples

DATE=(date)

Tuple Fields of Subshell

0: Box<Program>

Pipeline

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

Examples

cat $1 | wc -l

Tuple Fields of Pipeline

0: Box<Command>1: Box<Command>

Background

Run a command in the background.

Examples

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

Tuple Fields of Background

0: Box<Command>

Lang

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?

Tuple Fields of Lang

0: Interpreter1: String

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 copy of the value.

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>