Enum StringPart 

#[non_exhaustive]
pub enum StringPart {
    Literal(String),
    Var(VarPath),
    VarWithDefault {
        path: VarPath,
        default: Vec<StringPart>,
    },
    VarLength(VarPath),
    Positional(usize),
    AllArgs,
    ArgCount,
    Arithmetic(String),
    CommandSubst(Vec<Stmt>),
    LastExitCode,
    CurrentPid,
}

Part of an interpolated string.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Literal(String)

Literal text

Var(VarPath)

Variable interpolation: ${VAR} or $VAR

VarWithDefault

Variable with default: ${VAR:-default} / ${path[sub]:-default} where default can contain nested expansions

Fields

path: VarPath

default: Vec<StringPart>

VarLength(VarPath)

Variable string length: ${#VAR} or ${#path[sub]}

Positional(usize)

Positional parameter: $0, $1, …, $9

AllArgs

All arguments: $@

ArgCount

Argument count: $#

Arithmetic(String)

Arithmetic expansion: $((expr))

CommandSubst(Vec<Stmt>)

Command substitution: $(...) embedded in a string — runs a statement block (full grammar; see Expr::CommandSubst) and inlines its stdout.

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StringPart