Struct StdlibFn 

pub struct StdlibFn(pub Arc<dyn Fn(Vec<Value>) -> Result<Value, StdlibError> + Send + Sync>);

A callable function value for higher-order stdlib operations.

Wraps an Arc<dyn Fn> so it can be cloned, and provides Debug/PartialEq implementations that the derive macros can’t auto-generate for dyn Fn.

Tuple Fields

0: Arc<dyn Fn(Vec<Value>) -> Result<Value, StdlibError> + Send + Sync>

Implementations

impl StdlibFn

pub fn new( f: impl Fn(Vec<Value>) -> Result<Value, StdlibError> + Send + Sync + 'static, ) -> Self

Create a new stdlib function from a closure.

pub fn call(&self, args: Vec<Value>) -> Result<Value, StdlibError>

Call the function with the given arguments.

Trait Implementations

impl Clone for StdlibFn

fn clone(&self) -> StdlibFn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StdlibFn

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

Formats the value using the given formatter.

impl PartialEq for StdlibFn

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.