Enum ArgSyntax 

pub enum ArgSyntax {
    Positional,
    Arrow,
    ColonEquals,
}

How a FunctionArg was spelled.

The surface-form tag for the one canonical FunctionArg shape, mirroring CastSyntax: a positional argument carries no name, while the two PostgreSQL named-argument arrows are otherwise the same construct (=> is current, := is the deprecated spelling PostgreSQL still accepts), so this records which the source used to restore it on render.

Variants

Positional

A bare positional argument, as in f(x).

Arrow

A named argument written name => value.

ColonEquals

A named argument written with the deprecated name := value spelling.

Trait Implementations

impl Clone for ArgSyntax

fn clone(&self) -> ArgSyntax

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ArgSyntax

impl Debug for ArgSyntax

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ArgSyntax

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ArgSyntax

impl Hash for ArgSyntax

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 ArgSyntax

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ArgSyntax

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ArgSyntax