git.delta.rocks / jrsonnet / refs/commits / 94fa86f59bc6

1#![allow(clippy::type_complexity)]23use std::{path::Path, rc::Rc};45use gcmodule::Trace;67use crate::{8	error::Result,9	function::{parse_builtin_call, ArgsLike, Builtin, BuiltinParam, CallLocation},10	gc::TraceBox,11	Context, State, Val,12};1314#[derive(Trace)]15pub struct NativeCallback {16	pub(crate) params: Vec<BuiltinParam>,17	handler: TraceBox<dyn NativeCallbackHandler>,18}19impl NativeCallback {20	#[deprecated = "prefer using builtins directly, use this interface only for bindings"]21	pub fn new(params: Vec<BuiltinParam>, handler: TraceBox<dyn NativeCallbackHandler>) -> Self {22		Self { params, handler }23	}24}2526impl Builtin for NativeCallback {27	fn name(&self) -> &str {28		// TODO: standard natives gets their names from definition29		// But builitins should already have them30		"<native>"31	}3233	fn params(&self) -> &[BuiltinParam] {34		&self.params35	}3637	fn call(&self, s: State, ctx: Context, loc: CallLocation, args: &dyn ArgsLike) -> Result<Val> {38		let args = parse_builtin_call(s.clone(), ctx, &self.params, args, true)?;39		let mut out_args = Vec::with_capacity(self.params.len());40		for p in &self.params {41			out_args.push(args[&p.name].evaluate(s.clone())?);42		}43		self.handler.call(s, loc.0.map(|l| l.0.clone()), &out_args)44	}45}4647pub trait NativeCallbackHandler: Trace {48	fn call(&self, s: State, from: Option<Rc<Path>>, args: &[Val]) -> Result<Val>;49}