Enum SpecialParam

pub enum SpecialParam {
    At,
    Asterisk,
    Number,
    Question,
    Hyphen,
    Dollar,
    Exclamation,
    Zero,
}

Special parameter

This enum value identifies a special parameter in the shell language. Each special parameter is a single character that has a special meaning in the shell language. For example, @ represents all positional parameters.

See ParamType for other types of parameters.

Variants

At

@ (all positional parameters)

Asterisk

* (all positional parameters)

Number

# (number of positional parameters)

Question

? (exit status of the last command)

Hyphen

- (active shell options)

Dollar

$ (process ID of the shell)

Exclamation

! (process ID of the last asynchronous command)

Zero

0 (name of the shell or shell script)

Implementations

impl SpecialParam

pub const fn as_char(self) -> char

Returns the character representing the special parameter.

pub const fn from_char(c: char) -> Option<SpecialParam>

Returns the special parameter that corresponds to the given character.

If the character does not represent any special parameter, None is returned.

Trait Implementations

impl Clone for SpecialParam

fn clone(&self) -> SpecialParam

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SpecialParam

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

Formats the value using the given formatter.

impl Display for SpecialParam

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

Formats the value using the given formatter.

impl From<SpecialParam> for Param

Constructs a Param value representing a special parameter.

fn from(special: SpecialParam) -> Param

Converts to this type from the input type.

impl From<SpecialParam> for ParamType

fn from(special: SpecialParam) -> ParamType

Converts to this type from the input type.

impl FromStr for SpecialParam

type Err = NotSpecialParam

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<SpecialParam, NotSpecialParam>

Parses a string s to return a value of this type.

impl Hash for SpecialParam

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SpecialParam

fn eq(&self, other: &SpecialParam) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<char> for SpecialParam

type Error = NotSpecialParam

The type returned in the event of a conversion error.

fn try_from(c: char) -> Result<SpecialParam, NotSpecialParam>

Performs the conversion.

impl Copy for SpecialParam

impl Eq for SpecialParam

impl StructuralPartialEq for SpecialParam