mirror of
https://github.com/denoland/deno.git
synced 2024-10-29 08:58:01 -04:00
b518f5e1ba
* feat(core): facilitate op-disabling middleware By providing `void_op_sync()` and `void_op_async() as well as `core/examples/disable_ops.rs`
27 lines
715 B
Rust
27 lines
715 B
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
|
|
//! This example shows you how to define ops in Rust and then call them from
|
|
//! JavaScript.
|
|
|
|
use deno_core::Extension;
|
|
use deno_core::JsRuntime;
|
|
use deno_core::RuntimeOptions;
|
|
|
|
fn main() {
|
|
let my_ext = Extension::builder()
|
|
.middleware(|name, opfn| match name {
|
|
"op_print" => deno_core::void_op_sync(),
|
|
_ => opfn,
|
|
})
|
|
.build();
|
|
|
|
// Initialize a runtime instance
|
|
let mut runtime = JsRuntime::new(RuntimeOptions {
|
|
extensions: vec![my_ext],
|
|
..Default::default()
|
|
});
|
|
|
|
// Deno.core.print() will now be a NOP
|
|
runtime
|
|
.execute_script("<usage>", r#"Deno.core.print("I'm broken")"#)
|
|
.unwrap();
|
|
}
|