Struct NativeFn 

pub struct NativeFn {
    pub name: Arc<str>,
    pub diagnostic_id: NativeDiagnosticId,
    pub arity: Arity,
    pub func: NativeFnFunc,
    pub captures: Arc<[Value]>,
    pub blocking_func: Option<NativeFnFunc>,
}

Fields

name: Arc<str>

diagnostic_id: NativeDiagnosticId

Lazily assigned watchdog name id (Default::default() when building).

arity: Arity

func: NativeFnFunc

captures: Arc<[Value]>

Managed values retained by the opaque callable closure.

blocking_func: Option<NativeFnFunc>

Optional adapter that marshals owned inputs and offloads native work.

Implementations

impl NativeFn

pub fn new(name: impl Into<Arc<str>>, arity: Arity, func: NativeFnPtr) -> Self

Create from a bare function pointer (backwards-compatible).

pub fn with_closure( name: impl Into<Arc<str>>, arity: Arity, func: impl Fn(&[Value]) -> ValueResult<Value> + 'static, ) -> Self

Create a Rust callable with no managed captures. For closures that retain Values, use with_captures so the collector can visit them.

pub fn with_captures( name: impl Into<Arc<str>>, arity: Arity, captures: Vec<Value>, func: impl Fn(&[Value], &[Value]) -> ValueResult<Value> + 'static, ) -> Self

Create a callable with explicit managed captures for precise tracing. The callback and tracer share one immutable capture slice. Callers must not replace the public captures handle after construction.

pub fn with_blocking( name: impl Into<Arc<str>>, arity: Arity, func: impl Fn(&[Value]) -> ValueResult<Value> + 'static, blocking_func: impl Fn(&[Value]) -> ValueResult<Value> + 'static, ) -> Self

Create a native function with a separate owned-work blocking adapter. The adapter must keep managed conversions on the caller’s isolate.

pub fn call_blocking(&self, args: &[Value]) -> ValueResult<Value>

Call the blocking adapter. Reject unsupported functions before execution.

Trait Implementations

impl Debug for NativeFn

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

Formats the value using the given formatter.

impl Trace for NativeFn

fn trace(&self, visitor: &mut MarkVisitor)

fn gc_size_extra(&self) -> usize