Struct FunctionArg 

pub struct FunctionArg<X: Extension = NoExt> {
    pub name: Option<Symbol>,
    pub variadic: bool,
    pub syntax: ArgSyntax,
    pub value: Expr<X>,
    pub meta: Meta,
}

One argument of a FunctionCall: a bare positional value, or a PostgreSQL named argument name => value / name := value, optionally prefixed by the VARIADIC array-spread marker (VARIADIC arr, VARIADIC name => arr).

One canonical shape covers all three spellings: a positional argument is { name: None, syntax: Positional, value }, while a named argument carries name: Some(_) and an ArgSyntax surface tag recording which arrow the source wrote so it round-trips. name being Some ⟺ syntax is a named form is an invariant the parser upholds. The argument is a spanned node so the name => value extent has side-table identity of its own.

Fields

name: Option<Symbol>

The argument name for a named argument (name in name => value); None for a positional argument.

variadic: bool

The VARIADIC marker that spreads an array over a variadic parameter (f(a, VARIADIC arr)). A parse-layer prefix the parser admits only on the last argument of a call and never alongside an ALL/DISTINCT quantifier (both PostgreSQL and DuckDB parse-reject the other positions); it composes with the name => value named form, so it is a flag on the argument rather than a separate call-level field. false for an ordinary argument.

syntax: ArgSyntax

Which surface form spelled this argument (positional, =>, or :=).

value: Expr<X>

Value supplied by this syntax.

meta: Meta

Source location and node identity.

Trait Implementations

impl<X: Clone + Extension> Clone for FunctionArg<X>

fn clone(&self) -> FunctionArg<X>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<X: Debug + Extension> Debug for FunctionArg<X>

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

Formats the value using the given formatter.

impl<'de, X> Deserialize<'de> for FunctionArg<X>

where X: Deserialize<'de> + Extension,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<X: Eq + Extension> Eq for FunctionArg<X>

impl<X: Hash + Extension> Hash for FunctionArg<X>

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<X: PartialEq + Extension> PartialEq for FunctionArg<X>

fn eq(&self, other: &FunctionArg<X>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<X: Extension + Render> Render for FunctionArg<X>

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

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl<X> Serialize for FunctionArg<X>

where X: Serialize + Extension,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<X: Extension> Spanned for FunctionArg<X>

fn span(&self) -> Span

Return the span for this value.

impl<X: PartialEq + Extension> StructuralPartialEq for FunctionArg<X>