Function quickjs_runtime::quickjs_utils::functions::new_function_q

pub fn new_function_q<F>(
    q_ctx: &QuickJsRealmAdapter, 
    name: &str, 
    func: F, 
    arg_count: u32
) -> Result<JSValueRef, JsError> where
    F: Fn(&QuickJsRealmAdapter, &JSValueRef, &[JSValueRef]) -> Result<JSValueRef, JsError> + 'static, 

create a new Function which is backed by a closure

Example

use quickjs_runtime::builder::QuickJsRuntimeBuilder;
use quickjs_runtime::quickjs_utils::functions::new_function_q;
use quickjs_runtime::quickjs_utils::primitives::from_i32;
use quickjs_runtime::quickjs_utils::get_global_q;
use quickjs_runtime::quickjs_utils::objects::set_property_q;
use hirofa_utils::js_utils::Script;
let rt = QuickJsRuntimeBuilder::new().build();
rt.exe_rt_task_in_event_loop(|q_js_rt| {
    let q_ctx = q_js_rt.get_main_context();
    // create a function which always returns 1253
    let func_obj = new_function_q(q_ctx, "myFunc7654", |_q_ctx, _this, _args|{Ok(from_i32(1253))}, 0).ok().unwrap();
    // store as a global member so script can call it
    let global = get_global_q(q_ctx);
    set_property_q(q_ctx, &global, "myFunc7654", &func_obj);
});
rt.eval_sync(Script::new("new_function_q.es", "let a = myFunc7654(); if (a !== 1253) {throw Error('a was not 1253')}")).ok().expect("script failed");