Enum ArgKind 

#[non_exhaustive]
pub enum ArgKind<'arena, 'src> {
    Value(Expr<'arena, 'src>),
    Spread(Expr<'arena, 'src>),
    ByRef(Expr<'arena, 'src>),
    Placeholder,
    SpreadPlaceholder,
}

The form of a call argument.

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.

Value(Expr<'arena, 'src>)

A plain value: f($x), or f(name: $x) when the argument has a name.

Spread(Expr<'arena, 'src>)

A spread: f(...$args).

ByRef(Expr<'arena, 'src>)

Call-time pass-by-reference: f(&$x), a fatal error since PHP 5.4.

Placeholder

The PHP 8.6 partial-application placeholder ?.

SpreadPlaceholder

The PHP 8.6 partial-application placeholder ....

Trait Implementations

impl<'arena, 'src> Debug for ArgKind<'arena, 'src>

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

Formats the value using the given formatter.

impl<'arena, 'src> Serialize for ArgKind<'arena, 'src>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.