Struct HostFunction 

pub struct HostFunction { /* private fields */ }

A host function callable from WASM, wrapping a native closure with its declared WASM signature.

Implementations

impl HostFunction

pub fn new( ty: FuncType, func: impl FnMut(&[Value]) -> Result<Vec<Value>, RuntimeError> + 'static, ) -> Self

Wrap a closure with its WASM signature. The signature is checked against the import declaration at registration; argument values are passed positionally and results must match the declared result types.

pub fn ty(&self) -> &FuncType

The declared WASM signature.

pub fn call(&mut self, args: &[Value]) -> Result<Vec<Value>, RuntimeError>

Invoke the host function.

Trait Implementations

impl Debug for HostFunction

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

Formats the value using the given formatter.