Struct OptionDecl 

pub struct OptionDecl {
    pub long: String,
    pub short: Option<char>,
    pub takes_value: bool,
    pub allows_bare: bool,
    pub repeatable: bool,
    pub choices: Option<Vec<String>>,
}

Declaration of a single option (long flag, optionally with short alias).

Fields

long: String

Long name (without -- prefix).

short: Option<char>

Single-character short alias (without - prefix).

takes_value: bool

True for value-carrying options; false for presence-only flags (bool).

allows_bare: bool

True if bare --foo is legal (field type is bool, or a default is declared for an Option<T>). Ignored when takes_value = false.

repeatable: bool

True for list-typed options (Vec<T>): multiple occurrences and comma-separated values accumulate.

choices: Option<Vec<String>>

Restrict values to this set (validated at parse time).

Trait Implementations

impl Clone for OptionDecl

fn clone(&self) -> OptionDecl

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptionDecl

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

Formats the value using the given formatter.