Enum TrailingPolicy 

pub enum TrailingPolicy {
    Optional,
    Required,
    Forbidden,
}

Policy for trailing punctuation in punctuated sequences.

Controls whether a trailing separator (e.g., comma) is allowed after the last element.

Variants

Optional

Trailing punctuation is allowed but not required (e.g., [1, 2, 3] or [1, 2, 3,]).

Required

Trailing punctuation is required (e.g., use foo; where ; is required).

Forbidden

Trailing punctuation is forbidden (e.g., function arguments: f(a, b, c)).

Trait Implementations

impl Clone for TrailingPolicy

fn clone(&self) -> TrailingPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TrailingPolicy

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

Formats the value using the given formatter.

impl Hash for TrailingPolicy

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 TrailingPolicy

fn eq(&self, other: &TrailingPolicy) -> 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 Copy for TrailingPolicy

impl Eq for TrailingPolicy

impl StructuralPartialEq for TrailingPolicy