Struct OptionSpec 

pub struct OptionSpec {
    pub id: u16,
    pub short: Option<u8>,
    pub long: Option<&'static str>,
    pub arity: Arity,
    pub negatable: bool,
}

What: struct OptionSpec is one row of a Git option table. u16 is an unsigned 16-bit integer (siblings: u8, u32, usize). Option<u8> is “a byte or nothing”; &'static str is text baked into the program. Why: id lets a command module ask about an option by a named constant instead of by table position. u16 (not usize) keeps rows small; no table has 65 thousand rows.

In TS you’d write (pseudocode):

type OptionSpec = { id: number; short?: string; long?: string; arity: Arity; negatable: boolean };

Fields

id: u16

Identifier chosen by the command module; UNREAD when no fact reads the option.

short: Option<u8>

Git short_name: the single letter after one dash.

long: Option<&'static str>

Git long_name: the spelling after two dashes; it may itself start with no-.

arity: Arity

Value relationship.

negatable: bool

Whether --no-<long> is accepted (false for PARSE_OPT_NONEG).

Trait Implementations

impl Clone for OptionSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OptionSpec

impl Debug for OptionSpec

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

Formats the value using the given formatter.

impl Eq for OptionSpec

impl PartialEq for OptionSpec

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OptionSpec