git.delta.rocks / jrsonnet / refs/commits / 9b331948fca2

1use crate::{2	future_wrapper, map::LayeredHashMap, rc_fn_helper, resolved_lazy_val, LazyBinding, LazyVal,3	ObjValue, Result, Val,4};5use std::{cell::RefCell, collections::HashMap, fmt::Debug, rc::Rc};67rc_fn_helper!(8	ContextCreator,9	context_creator,10	dyn Fn(Option<ObjValue>, Option<ObjValue>) -> Result<Context>11);1213future_wrapper!(Context, FutureContext);1415struct ContextInternals {16	dollar: Option<ObjValue>,17	this: Option<ObjValue>,18	super_obj: Option<ObjValue>,19	bindings: LayeredHashMap<String, LazyVal>,20}21pub struct Context(Rc<ContextInternals>);22impl Debug for Context {23	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {24		f.debug_struct("Context")25			.field("this", &self.0.this.clone().map(|e| Rc::as_ptr(&e.0)))26			.finish()27	}28}29impl Context {30	pub fn new_future() -> FutureContext {31		FutureContext(Rc::new(RefCell::new(None)))32	}3334	pub fn dollar(&self) -> &Option<ObjValue> {35		&self.0.dollar36	}3738	pub fn this(&self) -> &Option<ObjValue> {39		&self.0.this40	}4142	pub fn super_obj(&self) -> &Option<ObjValue> {43		&self.0.super_obj44	}4546	pub fn new() -> Context {47		Context(Rc::new(ContextInternals {48			dollar: None,49			this: None,50			super_obj: None,51			bindings: LayeredHashMap::default(),52		}))53	}5455	pub fn binding(&self, name: &str) -> Result<LazyVal> {56		self.0.bindings.get(name).cloned().ok_or_else(|| {57			create_error::<()>(Error::UnknownVariable(name.to_owned()))58				.err()59				.unwrap()60		})61	}62	pub fn into_future(self, ctx: FutureContext) -> Context {63		{64			ctx.0.borrow_mut().replace(self);65		}66		ctx.unwrap()67	}6869	pub fn with_var(&self, name: String, value: Val) -> Result<Context> {70		let mut new_bindings = HashMap::with_capacity(1);71		new_bindings.insert(name, resolved_lazy_val!(value));72		self.extend(new_bindings, None, None, None)73	}7475	pub fn extend(76		&self,77		new_bindings: HashMap<String, LazyVal>,78		new_dollar: Option<ObjValue>,79		new_this: Option<ObjValue>,80		new_super_obj: Option<ObjValue>,81	) -> Result<Context> {82		let dollar = new_dollar.or_else(|| self.0.dollar.clone());83		let this = new_this.or_else(|| self.0.this.clone());84		let super_obj = new_super_obj.or_else(|| self.0.super_obj.clone());85		let bindings = if new_bindings.is_empty() {86			self.0.bindings.clone()87		} else {88			self.0.bindings.extend(new_bindings)89		};90		Ok(Context(Rc::new(ContextInternals {91			dollar,92			this,93			super_obj,94			bindings,95		})))96	}97	pub fn extend_unbound(98		&self,99		new_bindings: HashMap<String, LazyBinding>,100		new_dollar: Option<ObjValue>,101		new_this: Option<ObjValue>,102		new_super_obj: Option<ObjValue>,103	) -> Result<Context> {104		let this = new_this.or_else(|| self.0.this.clone());105		let super_obj = new_super_obj.or_else(|| self.0.super_obj.clone());106		let mut new = HashMap::with_capacity(new_bindings.len());107		for (k, v) in new_bindings.into_iter() {108			new.insert(k, v.evaluate(this.clone(), super_obj.clone())?);109		}110		self.extend(new, new_dollar, this, super_obj)111	}112}113114impl Default for Context {115	fn default() -> Self {116		Self::new()117	}118}119120impl PartialEq for Context {121	fn eq(&self, other: &Self) -> bool {122		Rc::ptr_eq(&self.0, &other.0)123	}124}125126impl Clone for Context {127	fn clone(&self) -> Self {128		Context(self.0.clone())129	}130}