Struct Closure 

pub struct Closure { /* private fields */ }

A SurrealQL anonymous function (closure), e.g. |$x: int| -> int $x * 2. As a DynExpr it nests anywhere an expression is taken — a SET value, a DEFINE PARAM/LET value, or an argument to a higher-order function (array::map($xs, |$x: int| $x * 2)).

Closure::new(Raw("$x * 2".into())).arg("x", "int").returns("int");
// |$x: int| -> int $x * 2

Implementations

impl Closure

pub fn new(body: impl DynExpr + 'static) -> Self

A closure with the given body and no arguments yet.

pub fn arg( self, name: impl Into<String>, surreal_type: impl Into<String>, ) -> Self

Add a typed argument $name: <surreal_type> (a leading $ is optional).

pub fn returns(self, surreal_type: impl Into<String>) -> Self

Set the return type (-> <surreal_type>).

Trait Implementations

impl Debug for Closure

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

Formats the value using the given formatter.

impl DynExpr for Closure

fn render_dyn(&self, buf: &mut String)

Append this expression’s SurrealQL to buf with all values inlined.

fn render_dyn_params( &self, buf: &mut String, params: &mut BTreeMap<String, Value>, )

Render with $param placeholders, collecting values into params. Default falls back to inline rendering; Literal nodes override this to emit $pN placeholders and collect their value.