1 unstable release
0.1.0 | Jan 10, 2022 |
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#3 in #duktape
Used in dukt-macros
3.5MB
74K
SLoC
duktape
Duktape is an embeddable Javascript engine, with a focus on portability and compact footprint.
Add to build
Cargo.toml:
duktape = { git = "https://github.com/polachok/duktape", rev = "45968b5be7240c6adaa5232b32085b7ac94b21f7" } duktape-sys = { git = "https://github.com/polachok/duktape", rev = "45968b5be7240c6adaa5232b32085b7ac94b21f7" }
bindings for Duktape javascript engine
Initialize a context
use duktape::Context;
let mut ctx = Context::default();
let x: u32 = ctx.eval("1+2").unwrap();
assert_eq!(x, 3);
Add rust function binding
use duktape::Context;
use duktape_macros::duktape;
let mut ctx = Context::default();
#[duktape]
fn native_adder(ctx: &mut Context) -> u32 {
let n = ctx.stack_len();
let mut res = 0;
for i in 0..n {
res += ctx.get_uint(i);
}
res
}
ctx.register_function("adder", NativeAdder);
let res: u32 = ctx.eval("adder(2,3)").unwrap();
assert_eq!(res, 5);
Push an object
use duktape::{PushValue, PeekValue, Context};
use duktape_macros::{duktape, Value};
let mut ctx = Context::default();
#[derive(Value)]
#[duktape(Peek, Push, Methods("sumFields"))]
struct Test {
a: u32,
b: u32,
}
impl Test {
#[duktape(this = "Test")]
fn sum_fields(&self) -> u32 {
self.a + self.b
}
}
let t = Test { a: 4, b: 2 };
let obj_id = t.push_to(&mut ctx);
ctx.push_string("sumFields");
ctx.call_prop(obj_id as i32, 0);
let sum = u32::peek_at(&mut ctx, -1).unwrap();
assert_eq!(sum, 6);
Dependencies
~1.4–4MB
~87K SLoC