Enum StringPart 

pub enum StringPart {
    Literal(String),
    Var(VarPath),
    VarWithDefault {
        name: String,
        default: Vec<StringPart>,
    },
    VarLength(String),
    Positional(usize),
    AllArgs,
    ArgCount,
    Arithmetic(String),
    CommandSubst(Pipeline),
    LastExitCode,
    CurrentPid,
}

Part of an interpolated string.

Variants

Literal(String)

Literal text

Var(VarPath)

Variable interpolation: ${VAR} or $VAR

VarWithDefault

Variable with default: ${VAR:-default} where default can contain nested expansions

Fields

name: String

default: Vec<StringPart>

VarLength(String)

Variable string length: ${#VAR}

Positional(usize)

Positional parameter: $0, $1, …, $9

AllArgs

All arguments: $@

ArgCount

Argument count: $#

Arithmetic(String)

Arithmetic expansion: $((expr))

CommandSubst(Pipeline)

Command substitution: $(pipeline) embedded in a string

LastExitCode

Last exit code: $?

CurrentPid

Current shell PID: $$

Trait Implementations

impl Clone for StringPart

fn clone(&self) -> StringPart

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StringPart

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

Formats the value using the given formatter.

impl PartialEq for StringPart

fn eq(&self, other: &StringPart) -> 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 StructuralPartialEq for StringPart