git.delta.rocks / jrsonnet / refs/commits / 64fb3950ee00

1use crate::{2	binding, bool_val, context_creator, function_default, function_rhs, future_wrapper,3	lazy_binding, lazy_val, Binding, Context, ContextCreator, FuncDesc, LazyBinding, ObjMember,4	ObjValue, Val,5};6use closure::closure;7use jsonnet_parser::{8	ArgsDesc, BinaryOpType, BindSpec, Expr, FieldMember, LiteralType, Member, ObjBody, ParamsDesc,9	UnaryOpType, Visibility,10};11use std::{12	collections::{BTreeMap, HashMap},13	rc::Rc,14};1516pub fn evaluate_binding(b: &BindSpec, context_creator: ContextCreator) -> (String, LazyBinding) {17	let b = b.clone();18	if let Some(args) = &b.params {19		let args = args.clone();20		(21			b.name.clone(),22			lazy_binding!(move |this, super_obj| lazy_val!(23				closure!(clone b, clone args, clone context_creator, || evaluate_method(24					context_creator.0(this.clone(), super_obj.clone()),25					&b.value,26					args.clone()27				))28			)),29		)30	} else {31		(32			b.name.clone(),33			lazy_binding!(move |this, super_obj| {34				lazy_val!(closure!(clone context_creator, clone b, || evaluate(35					context_creator.0(this.clone(), super_obj.clone()),36					&b.value37				)))38			}),39		)40	}41}4243pub fn evaluate_method(ctx: Context, expr: &Expr, arg_spec: ParamsDesc) -> Val {44	Val::Func(FuncDesc {45		ctx,46		params: arg_spec,47		eval_rhs: function_rhs!(closure!(clone expr, |ctx| evaluate(ctx, &expr))),48		eval_default: function_default!(|ctx, default| evaluate(ctx, &default)),49	})50}5152pub fn evaluate_field_name(context: Context, field_name: &jsonnet_parser::FieldName) -> String {53	match field_name {54		jsonnet_parser::FieldName::Fixed(n) => n.clone(),55		jsonnet_parser::FieldName::Dyn(expr) => {56			let name = evaluate(context, expr).unwrap_if_lazy();57			match name {58				Val::Str(n) => n,59				_ => panic!(60					"dynamic field name can be only evaluated to 'string', got: {:?}",61					name62				),63			}64		}65	}66}6768pub fn evaluate_unary_op(op: UnaryOpType, b: &Val) -> Val {69	match (op, b) {70		(o, Val::Lazy(l)) => evaluate_unary_op(o, &l.0()),71		(UnaryOpType::Not, Val::Literal(LiteralType::True)) => Val::Literal(LiteralType::False),72		(UnaryOpType::Not, Val::Literal(LiteralType::False)) => Val::Literal(LiteralType::True),73		(op, o) => panic!("unary op not implemented: {:?} {:?}", op, o),74	}75}7677pub fn evaluate_binary_op(a: &Val, op: BinaryOpType, b: &Val) -> Val {78	match (a, op, b) {79		(Val::Lazy(a), o, b) => evaluate_binary_op(&a.0(), o, b),80		(a, o, Val::Lazy(b)) => evaluate_binary_op(a, o, &b.0()),8182		(Val::Str(v1), BinaryOpType::Add, Val::Str(v2)) => Val::Str(v1.to_owned() + &v2),83		(Val::Str(v1), BinaryOpType::Eq, Val::Str(v2)) => bool_val(v1 == v2),84		(Val::Str(v1), BinaryOpType::Ne, Val::Str(v2)) => bool_val(v1 != v2),8586		(Val::Str(v1), BinaryOpType::Add, Val::Num(v2)) => Val::Str(format!("{}{}", v1, v2)),87		(Val::Str(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Str(v1.repeat(*v2 as usize)),8889		(Val::Literal(LiteralType::False), BinaryOpType::And, Val::Literal(LiteralType::False)) => {90			bool_val(false)91		}92		(Val::Literal(LiteralType::False), BinaryOpType::And, Val::Literal(LiteralType::True)) => {93			bool_val(false)94		}95		(Val::Literal(LiteralType::True), BinaryOpType::And, Val::Literal(LiteralType::False)) => {96			bool_val(false)97		}98		(Val::Literal(LiteralType::True), BinaryOpType::And, Val::Literal(LiteralType::True)) => {99			bool_val(true)100		}101102		(Val::Obj(v1), BinaryOpType::Add, Val::Obj(v2)) => Val::Obj(v2.with_super(v1.clone())),103104		(Val::Arr(a), BinaryOpType::Add, Val::Arr(b)) => Val::Arr([&a[..], &b[..]].concat()),105106		(Val::Num(v1), BinaryOpType::Mul, Val::Num(v2)) => Val::Num(v1 * v2),107		(Val::Num(v1), BinaryOpType::Div, Val::Num(v2)) => Val::Num(v1 / v2),108		(Val::Num(v1), BinaryOpType::Mod, Val::Num(v2)) => Val::Num(v1 % v2),109110		(Val::Num(v1), BinaryOpType::Add, Val::Num(v2)) => Val::Num(v1 + v2),111		(Val::Num(v1), BinaryOpType::Sub, Val::Num(v2)) => Val::Num(v1 - v2),112113		(Val::Num(v1), BinaryOpType::Lhs, Val::Num(v2)) => {114			Val::Num(((*v1 as i32) << (*v2 as i32)) as f64)115		}116		(Val::Num(v1), BinaryOpType::Rhs, Val::Num(v2)) => {117			Val::Num(((*v1 as i32) >> (*v2 as i32)) as f64)118		}119120		(Val::Num(v1), BinaryOpType::Lt, Val::Num(v2)) => bool_val(v1 < v2),121		(Val::Num(v1), BinaryOpType::Gt, Val::Num(v2)) => bool_val(v1 > v2),122		(Val::Num(v1), BinaryOpType::Lte, Val::Num(v2)) => bool_val(v1 <= v2),123		(Val::Num(v1), BinaryOpType::Gte, Val::Num(v2)) => bool_val(v1 >= v2),124125		(Val::Num(v1), BinaryOpType::Eq, Val::Num(v2)) => bool_val((v1 - v2).abs() < f64::EPSILON),126		(Val::Num(v1), BinaryOpType::Ne, Val::Num(v2)) => bool_val((v1 - v2).abs() > f64::EPSILON),127128		(Val::Num(v1), BinaryOpType::BitAnd, Val::Num(v2)) => {129			Val::Num(((*v1 as i32) & (*v2 as i32)) as f64)130		}131		(Val::Num(v1), BinaryOpType::BitOr, Val::Num(v2)) => {132			Val::Num(((*v1 as i32) | (*v2 as i32)) as f64)133		}134		(Val::Num(v1), BinaryOpType::BitXor, Val::Num(v2)) => {135			Val::Num(((*v1 as i32) ^ (*v2 as i32)) as f64)136		}137		_ => panic!("no rules for binary operation: {:?} {:?} {:?}", a, op, b),138	}139}140141future_wrapper!(HashMap<String, LazyBinding>, FutureNewBindings);142future_wrapper!(ObjValue, FutureObjValue);143144// TODO: Asserts145pub fn evaluate_object(context: Context, object: ObjBody) -> ObjValue {146	match object {147		ObjBody::MemberList(members) => {148			let new_bindings = FutureNewBindings::new();149			let future_this = FutureObjValue::new();150			let context_creator = context_creator!(151				closure!(clone context, clone new_bindings, clone future_this, |this: Option<ObjValue>, super_obj: Option<ObjValue>| {152					context.clone().extend(153						new_bindings.clone().unwrap(),154						context.clone().dollar().clone().or_else(||this.clone()),155						Some(this.clone().unwrap()),156						super_obj157					)158				})159			);160			{161				let mut bindings: HashMap<String, LazyBinding> = HashMap::new();162				for (n, b) in members163					.iter()164					.filter_map(|m| match m {165						Member::BindStmt(b) => Some(b.clone()),166						_ => None,167					})168					.map(|b| evaluate_binding(&b, context_creator.clone()))169				{170					bindings.insert(n, b);171				}172				new_bindings.fill(bindings);173			}174175			let mut new_members = BTreeMap::new();176			for member in members.into_iter() {177				match member {178					Member::Field(FieldMember {179						name,180						plus,181						params: None,182						visibility,183						value,184					}) => {185						let name = evaluate_field_name(context.clone(), &name);186						new_members.insert(187							name,188							ObjMember {189								add: plus,190								visibility: visibility.clone(),191								invoke: binding!(192									closure!(clone value, clone context_creator, |this, super_obj| {193										let context = context_creator.0(this, super_obj);194										// TODO: Assert195										evaluate(196											context,197											&value,198										).unwrap_if_lazy()199									})200								),201							},202						);203					}204					Member::Field(FieldMember {205						name,206						params: Some(params),207						value,208						..209					}) => {210						let name = evaluate_field_name(context.clone(), &name);211						new_members.insert(212							name,213							ObjMember {214								add: false,215								visibility: Visibility::Hidden,216								invoke: binding!(217									closure!(clone value, clone context_creator, |this, super_obj| {218										// TODO: Assert219										evaluate_method(220											context_creator.0(this, super_obj),221											&value.clone(),222											params.clone(),223										)224									})225								),226							},227						);228					}229					Member::BindStmt(_) => {}230					Member::AssertStmt(_) => {}231				}232			}233			future_this.fill(ObjValue::new(None, Rc::new(new_members)))234		}235		_ => todo!(),236	}237}238239pub fn evaluate(context: Context, expr: &Expr) -> Val {240	use Expr::*;241	match &*expr {242		Literal(LiteralType::This) => Val::Obj(243			context244				.this()245				.clone()246				.unwrap_or_else(|| panic!("this not found")),247		),248		Literal(LiteralType::Super) => Val::Obj(249			context250				.super_obj()251				.clone()252				.unwrap_or_else(|| panic!("super not found")),253		),254		Literal(t) => Val::Literal(t.clone()),255		Parened(e) => evaluate(context, e),256		Str(v) => Val::Str(v.clone()),257		Num(v) => Val::Num(*v),258		BinaryOp(v1, o, v2) => {259			evaluate_binary_op(&evaluate(context.clone(), v1), *o, &evaluate(context, v2))260		}261		UnaryOp(o, v) => evaluate_unary_op(*o, &evaluate(context, v)),262		Var(name) => Val::Lazy(context.binding(&name)).unwrap_if_lazy(),263		Index(box value, box index) => {264			match (265				evaluate(context.clone(), value).unwrap_if_lazy(),266				evaluate(context.clone(), index),267			) {268				(Val::Obj(v), Val::Str(s)) => v269					.get(&s)270					.unwrap_or_else(closure!(clone context, || {271						if let Some(n) = v.get("__intristic_namespace__") {272							if let Val::Str(n) = n.unwrap_if_lazy() {273								Val::Intristic(n, s)274							} else {275								panic!("__intristic_namespace__ should be string");276							}277						} else {278							panic!("{} not found in {:?}", s, v)279						}280					}))281					.unwrap_if_lazy(),282				(Val::Arr(v), Val::Num(n)) => v283					.get(n as usize)284					.unwrap_or_else(|| panic!("out of bounds"))285					.clone(),286				(Val::Str(s), Val::Num(n)) => {287					// FIXME: Only works for ASCII288					Val::Str(String::from_utf8(vec![s.as_bytes()[n as usize]]).unwrap())289				}290				(v, i) => todo!("not implemented: {:?}[{:?}]", v, i.unwrap_if_lazy()),291			}292		}293		LocalExpr(bindings, returned) => {294			let mut new_bindings: HashMap<String, LazyBinding> = HashMap::new();295			let future_context = Context::new_future();296297			let context_creator = context_creator!(298				closure!(clone future_context, |_, _| future_context.clone().unwrap())299			);300301			for (k, v) in bindings302				.iter()303				.map(move |b| evaluate_binding(b, context_creator.clone()))304			{305				new_bindings.insert(k, v);306			}307308			let context = context309				.extend(new_bindings, None, None, None)310				.into_future(future_context);311			evaluate(context, &*returned.clone())312		}313		Obj(body) => Val::Obj(evaluate_object(context, body.clone())),314		Apply(box value, ArgsDesc(args)) => {315			let value = evaluate(context.clone(), value).unwrap_if_lazy();316			match value {317				// TODO: Capture context of application318				Val::Intristic(ns, name) => match (&ns as &str, &name as &str) {319					("std", "length") => {320						assert_eq!(args.len(), 1);321						let expr = &args.get(0).unwrap().1;322						match evaluate(context, expr) {323							Val::Str(n) => Val::Num(n.len() as f64),324							Val::Arr(i) => Val::Num(i.len() as f64),325							v => panic!("can't get length of {:?}", v),326						}327					}328					("std", "type") => {329						assert_eq!(args.len(), 1);330						let expr = &args.get(0).unwrap().1;331						Val::Str(evaluate(context, expr).type_of().to_owned())332					}333					("std", "makeArray") => {334						assert_eq!(args.len(), 2);335						if let (Val::Num(v), Val::Func(d)) = (336							evaluate(context.clone(), &args[0].1),337							evaluate(context, &args[1].1),338						) {339							assert!(v > 0.0);340							let mut out = Vec::with_capacity(v as usize);341							for i in 0..v as usize {342								out.push(d.evaluate(vec![(None, Val::Num(i as f64))]))343							}344							Val::Arr(out)345						} else {346							panic!("bad makeArray call");347						}348					}349					("std", "codepoint") => {350						assert_eq!(args.len(), 1);351						if let Val::Str(s) = evaluate(context.clone(), &args[0].1) {352							// FIXME: this is not a codepoint353							Val::Num(s.as_bytes()[0] as f64)354						} else {355							panic!("bad codepoint call");356						}357					}358					(ns, name) => panic!("Intristic not found: {}.{}", ns, name),359				},360				Val::Func(f) => f.evaluate(361					args.clone()362						.into_iter()363						.map(|a| {364							(365								a.clone().0,366								Val::Lazy(lazy_val!(367									closure!(clone context, clone a, || evaluate(context.clone(), &a.clone().1))368								)),369							)370						})371						.collect(),372				),373				_ => panic!("{:?} is not a function", value),374			}375		}376		Function(params, body) => evaluate_method(context, body, params.clone()),377		Error(e) => panic!("error: {}", evaluate(context, e)),378		IfElse {379			cond,380			cond_then,381			cond_else,382		} => match evaluate(context.clone(), &cond.0).unwrap_if_lazy() {383			Val::Literal(LiteralType::True) => evaluate(context, cond_then),384			Val::Literal(LiteralType::False) => match cond_else {385				Some(v) => evaluate(context, v),386				None => Val::Literal(LiteralType::False),387			},388			v => panic!("if condition evaluated to {:?} (boolean needed instead)", v),389		},390		_ => panic!("evaluation not implemented: {:?}", expr),391	}392}